Climate and monthly weather forecastGrangeville, ID
Climate and monthly weather forecast
The climate of Grangeville
Located in Idaho, USA, Grangeville has a Marine west coast, warm summer climate, as classified by the Köppen climate classification as Cfb. Geographically, it occupies a region with extensive climatic and weather fluctuations throughout the year. Certain weather patterns and statistics define the city's annual climatic regime, which is characterized by warm summers and predominantly cool winters, determining the lifestyle and activities of the inhabitants.The yearly average high temperatures range from 33.6°F (0.9°C) in January to a peak of 82.6°F (28.1°C) in August, while the lows vary from a bottom of 21.7°F (-5.7°C) in December to 53.2°F (11.8°C), also in August. Throughout the year, differences in temperature can be considerable. The increase from the winter months to the summer months exemplifies these shifts, a typical attribute of this climate system.
Different weather elements such as sunshine hours, rainfall, snowfall, and wind contribute to Grangeville's overall climate. Analysis shows that the longest daylight duration, about 15.7 hours, can be expected in June, whereas December is the month with the shortest daylight time, just 8.7 hours. Between January and December, the rainfall levels oscillate from a low of 0.59" (15mm) in July to a high in April of 2.91" (74mm).
The highest snowfall of 12.8" (325mm) generally occurs in December, with no snowfall from May to September. The pace of the wind fluctuates throughout the year, with the speediest wind, 5.3mph (8.5km/h), occurring in January and November, and the slowest, 3.8mph (6.1km/h), in August.
The best time to visit Grangeville
For potential tourists, June to September is arguably the best time to visit Grangeville. The rationale behind this timing is the reliably warm and comfortable weather conditions. The period see temps soaring to between 62.6°F (17°C) and 82.6°F (28.1°C) and a low rainfall of between 0.59" (15mm) and 0.94" (24mm), which creates ideal conditions for outdoor activities and sightseeing.Additionally, these months receive the most extended daylight time, ranging from 15 hours in June to 12.5 hours in September, providing ample time for daytime activities. The humidity level drops from 69% in June to a comfortable year-low of 47% in August, adding to the pleasant weather conditions during this period.
The worst time to visit Grangeville
January and February are arguably the least favored months for tourism in Grangeville, mainly due to the cold weather conditions. Temperature highs stay between 33.6°F (0.9°C) and 37.6°F (3.1°C), while lows drop to between 21.7°F (-5.7°C) and 25°F (-3.9°C). During these months, Grangeville experiences the heaviest snowfall, with an average of 12.4" (315mm) in January and 12.9" (328mm) in February.Furthermore, these months experience the most reduced sunlight hours, with average monthly sunshine duration of 4.8 and 4.9 hours respectively. Consequently, the low temperatures, reduced daylight, and increased snowfall make it inconvenient for outdoor activities and sightseeing.
Spring weather in Grangeville
Spring in Grangeville extends from March to May and is marked by progressively rising temperatures and steady rainfall. The average high temperature elevates from 44.6°F (7°C) in March to 62.6°F (17°C) by May, while the average low temperature rises from 29.7°F (-1.3°C) in March to 38.8°F (3.8°C) in May.Rainfall during these months ranges within 2.83" (72mm) and 2.32" (59mm), making it one of the wetter periods of the year. As temperatures rise through the period, snowfall decreases, moving from 9.96" (253mm) in March to almost nil in May.
Summer weather in Grangeville
Summer in Grangeville spans from June through August. The season is characterized by high temperatures ranging within 69.4°F (20.8°C) to 82.6°F (28.1°C). Average low temperatures also stay comfortably warm, ranging between 44.2°F (6.8°C) and 53.2°F (11.8°C).Although it is the driest season with rainfall as low as 0.59" (15mm) in July, the humidity level reduces significantly to make the weather comfortable. This period also experiences zero snowfall, bringing the advantage of clear skies and bright sunshine.
Autumn weather in Grangeville
Fall in Grangeville, occurring from September to November, is a season of cooling temperatures. The average high temperature ranges from 72.7°F (22.6°C) in September to a chilly 43.3°F (6.3°C) by November. The average low temperature follows this downward trend, from 47.3°F (8.5°C) in September to 29.1°F (-1.6°C) in November.Rainfall slightly increases compared to summer, from 0.94" (24mm) in September to 2.01" (51mm) in November, but remains relatively lower than in spring or winter. Snow re-emerges in November with an average of 5.67" (144mm) as winter approaches.
Winter weather in Grangeville
Winter in Grangeville stretches from December to February. It is characterized by cold temperatures and heavy snowfall. Temperature highs range from 33.6°F (0.9°C) to 37.6°F (3.1°C) and the lows vary between 21.7°F (-5.7°C) and 25°F (-3.9°C).December witnesses the highest snowfall of the year, measuring around 12.8" (325mm), making travel during this month slightly difficult. Additionally, winter presents the year's lowest visibility parameters, primarily due to cloudy skies and snowfall. January and February continue the cold trend, with periods of snowfall and chilling temperatures prevailing.
Weather in January
Grangeville, Idaho experiences a cold start to the year with January. The frigid weather sees average high and low temperatures of 35.6°F (2°C) and 24.1°F (-4.4°C), respectively, with an impressive 12.48" (317mm) of snowfall over 15 days. Weather in January »Weather in February
A seamless transition from January blankets Grangeville with cold winds, snowy conditions and cloudy skies. Noteworthy is the increase in snowfall which reaches 12.95" (329mm) in February. sunlight hours increase to around 10.4 hours a day, although the weather remains cold. Weather in February »Weather in March
Moving into March, Grangeville begins to shed its white winter cloak as the city experiences higher temperatures. However, substantial snowfall of nearly 10" (254mm) still blankets the ground. There's an observable decrease in cloud cover and increase in daylight hours, promising the forthcoming arrival of spring. Weather in March »Weather in April
April in Grangeville brings about a noticeable change in the climate as winter transitions to spring. As warmer air replaces the wintry chill, all the snowfalls give way to more rainfall, amounting to close to 3" (76mm) over 19 days. Weather in April »Weather in May
Grangeville embraces May with warmer temperatures and lengthened daylight hours. The climate sees a significant decrease in cloud cover and rainfall, a mere 2.32" (59mm), signifying the peak of spring. With almost no snowfall, the city welcomes its residents outdoors to enjoy a plethora of springtime activities. Weather in May »Weather in June
The weather in June in Grangeville shows the unmistakable signs of an approaching summer, with corresponding weather conditions. The remarkable feature in June is the absence of snowfall, paving the way for outdoor enthusiast to seize the day. Weather in June »Weather in July
July's weather in Grangeville, Idaho is in stark contrast to the beginning of the year. The city experiences the highest temperatures of the year with the mercury soaring to nearly 82°F (27.8°C). As sunlight dominates the weather, the city sees only a negligible 0.59" (15mm) of precipitation over seven days. Weather in July »Weather in August
As August starts in Grangeville, the scorching hot July gives way to somewhat cooler, yet still warm, weather conditions. Despite the slight dip in the temperature, the city witnesses a maximum temperature of 82.6°F (28.1°C). It's not surprising to see locals and tourists continuing to indulge in various water sports and picnics. Weather in August »Weather in September
The onset of September in Grangeville brings with it the first hints of the approaching autumn. The temperature begins to fall significantly as compared to the preceding months, but the summer warmth lingers. A remarkable characteristic of September's weather is a slight increase in rainfall to almost 1 inch. Weather in September »Weather in October
October in Grangeville, Idaho is synonymous with falling leaves, cooler temperatures and shorter days. The shift in weather stands evident, with further reduced daylight hours and a significant decrease in temperature compared to September. Weather in October »Weather in November
In November, Grangeville experiences a further drop in temperature and increase in precipitation levels. As frosty winds start looming, the city braces itself for the winter with an average of 5.67" (144mm) of snowfall. The transition from fall to winter becomes apparent with the landscape transforming into a white wonderland. Weather in November »Weather in December
Come December, Grangeville is completely submerged in winter, with the weather becoming harsh and frigid. The visible transition from November is the increase in snowfall, standing at nearly 13" (330mm), the highest of the year. Weather in December »Updated: Jul 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January is the most humid month, with an average relative humidity of 88%.
Throughout the year, there are 146.2 rainfall days, and 23.35" (593mm) of precipitation is accumulated.
January through May, September through December are months with snowfall.
In Grangeville, during the entire year, snow falls for 80.3 days and aggregates up to 60.47" (1536mm) of snow.
With an average of 4.8h of sunshine, January has the least sunshine of the year.
February is the month with the most snowfall. Snow falls for 15.3 days and accumulates 12.95" (329mm) of snow.
With an average maximum UV index of 1, February is the month with the lowest UV index in Grangeville.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
April is the month with the most rainfall in Grangeville. Rain falls for 19.3 days and accumulates 2.91" (74mm) of precipitation.
June through August are months without snowfall.
June has the longest days of the year in Grangeville, with an average of 15h and 42min of daylight.
July is the month with the least rainfall. Rain falls for 7.3 days and accumulates 0.59" (15mm) of precipitation.
July is the month with the highest UV index, with an average maximum UV index of 6.
In Grangeville, August registers the highest temperatures, averaging 82.6°F (28.1°C) at the peak and 53.2°F (11.8°C) at the lowest.
The least humid month is August, with an average relative humidity of 47%.
August has the most sunshine of the year, with an average of 11.9h of sunshine.
December, noted for its average high-temperature of 33.6°F (0.9°C) and an average low-temperature of 21.7°F (-5.7°C), is considered the coldest month.
December has the shortest days of the year, with an average of 8h and 42min of daylight.
Average temperature
Grangeville, ID
The warmest month (with the highest average high temperature) is August (82.6°F).
The month with the lowest average high temperature is December (33.6°F).
The month with the highest average low temperature is August (53.2°F).
The coldest month (with the lowest average low temperature) is December (21.7°F).
Average pressure
Grangeville, ID
- Average pressure in January:
30.21"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
30.01"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.94"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.19"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The months with the lowest atmospheric pressure are June and August (29.94"Hg).
Average wind speed
Grangeville, ID
- Average wind speed in January:
4.9mph - Average wind speed in February:
4.8mph - Average wind speed in March:
4.8mph - Average wind speed in April:
4.5mph - Average wind speed in May:
4mph - Average wind speed in June:
3.9mph
- Average wind speed in July:
4mph - Average wind speed in August:
3.8mph - Average wind speed in September:
3.9mph - Average wind speed in October:
4.3mph - Average wind speed in November:
4.9mph - Average wind speed in December:
4.8mph
The windiest months (with the highest average wind speed) are January and November (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity
Grangeville, ID
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is August (47%).
Average rainfall
Grangeville, ID
- Average rainfall in January:
2.05" - Average rainfall in February:
2.52" - Average rainfall in March:
2.83" - Average rainfall in April:
2.91" - Average rainfall in May:
2.32" - Average rainfall in June:
2.44"
- Average rainfall in July:
0.59" - Average rainfall in August:
0.63" - Average rainfall in September:
0.94" - Average rainfall in October:
1.89" - Average rainfall in November:
2.01" - Average rainfall in December:
2.2"
The wettest month (with the highest rainfall) is April (2.91").
The driest month (with the least rainfall) is July (0.59").
Average rainfall days
Grangeville, ID
- Average rainfall days in January:
10.3 days - Average rainfall days in February:
11 days - Average rainfall days in March:
17 days - Average rainfall days in April:
19.3 days - Average rainfall days in May:
17.8 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
7.3 days - Average rainfall days in August:
6.8 days - Average rainfall days in September:
7.8 days - Average rainfall days in October:
12.6 days - Average rainfall days in November:
11.4 days - Average rainfall days in December:
9.1 days
The month with the highest number of rainy days is April (19.3 days).
The month with the least rainy days is August (6.8 days).
Average snowfall
Grangeville, ID
- Average snowfall in January:
12.48" - Average snowfall in February:
12.95" - Average snowfall in March:
9.96" - Average snowfall in April:
3.54" - Average snowfall in May:
0.51" - Average snowfall in June:
0"
The month with the highest snowfall is February (12.95").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Grangeville, ID
- Average snowfall days in January:
15.2 days - Average snowfall days in February:
15.3 days - Average snowfall days in March:
12.6 days - Average snowfall days in April:
7.4 days - Average snowfall days in May:
1.3 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.3 days - Average snowfall days in October:
1.8 days - Average snowfall days in November:
9.5 days - Average snowfall days in December:
16.9 days
The month with the highest number of snowfall days is December (16.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Grangeville, ID
- Average daylight in January:
9h and 6min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 36min - Average daylight in May:
15h and 0min - Average daylight in June:
15h and 42min
- Average daylight in July:
15h and 18min - Average daylight in August:
14h and 6min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 30min - Average daylight in December:
8h and 42min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January:
4h and 48min - Average sunshine in February:
4h and 54min - Average sunshine in March:
6h and 30min - Average sunshine in April:
9h and 6min - Average sunshine in May:
10h and 6min - Average sunshine in June:
10h and 30min
- Average sunshine in July:
11h and 42min - Average sunshine in August:
11h and 54min - Average sunshine in September:
10h and 0min - Average sunshine in October:
7h and 12min - Average sunshine in November:
5h and 48min - Average sunshine in December:
4h and 54min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days
Grangeville, ID
- Average sunshine days in January:
11.8 days - Average sunshine days in February:
9 days - Average sunshine days in March:
7.5 days - Average sunshine days in April:
7.8 days - Average sunshine days in May:
10.6 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
21 days - Average sunshine days in August:
22.2 days - Average sunshine days in September:
20 days - Average sunshine days in October:
16.3 days - Average sunshine days in November:
12.5 days - Average sunshine days in December:
11.5 days
The month with the most sunshine days is August (22.2 days).
The month with the least sunshine days is March (7.5 days).
Average UV index
Grangeville, ID
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover
Grangeville, ID
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility
Grangeville, ID
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
