Climate and monthly weather forecastGranby, CO
Climate and monthly weather forecast
The climate of Granby
Located in Colorado, USA, Granby has a dominant climate recognised as Dfc by the Köppen climate classification system. The description for this specific climate is Subarctic, severe winter, no dry season, cool summer.On assessing the provided annual weather parameters, it becomes evident that Granby is subject to broad temperature variations. Between January to December, the upper temperature ranges from 25°F (-3.9°C) to 72.3°F (22.4°C), but at its lowest, the temperature gets as chilly as 4.3°F (-15.4°C) to 43.7°F (6.5°C). Throughout the year, humidity varies from 49% to 87%.
Another notable aspect in Granby's weather conditions is the rainfall pattern. The monthly rain varies from 0.55" (14mm) to 1.73" (44mm), spread over 4.9 days to 12.8 days. Additionally, Granby does not remain dry in winter as some regions do. It receives impressive snow between January and April and later in October to December, adding up to 10.94" (278mm) per month at its peak.
The best time to visit Granby
With bearable temperatures, modest rainfall, and a considerable number of sunshine hours, the period from June to August is ideal to visit Granby. During this frame, the temperatures are relatively warm, ranging between 52.3°F (11.3°C) and 71.2°F (21.8°C). The rainiest month among these is June, receiving 1.26" (32mm) spread over approximately 8.7 days.Another good news for visitors traveling during this time is the longer daylight hours. With around 14.7 hours of daylight in July, tourists can plan several outdoor activities. Those who enjoy sunbathing will also be pleased to find an average of around 11.8 hours of sunshine.
The worst time to visit Granby
Winters in Granby can be testing for those unaccustomed to extreme cold weather. December to February are the coldest months with the temperature dropping between 4.3°F (-15.4°C) and 33.6°F (0.9°C). December, in particular, records the lowest daylight hours of 9.4. Snowfall is also frequent in these months, peaking in February with about 8.7" (221mm).Spring weather in Granby
Spring season, observed from March to May, witnesses a significant rise in temperature from 33.6°F (0.9°C) to 52.3°F (11.3°C). The lowest temperature, however, lingers around 19.2°F (-7.1°C) to 28.6°F (-1.9°C). During this period, rainfall is quite high, specifically in April and May receiving around 1.54" (39mm) and 1.73" (44mm) of rain, respectively. Snowfall also remains a part of the weather in March and April, with the snow depth measuring 10.94" (278mm) in March and 7.87" (200mm) in April.Summer weather in Granby
The summer period initiates from June and continues till August. During this time, the temperatures peak with the highest average being around 72.3°F (22.4°C) in July and the lowest averaging 38.5°F (3.6°C) to 43.7°F (6.5°C). Rainfall is evenly dispatched throughout the season with each month receiving less than 1.26" (32mm). Moreover, the sun shines for about 10.9 hours to 11.8 hours a day, ensuring a warm and pleasant environment for outdoor activities.Autumn weather in Granby
Autumn in Granby runs from September through November. Temperatures during this period settle down between 35.2°F (1.8°C) and 64.4°F (18°C). The region receives rainfall between 0.59" (15mm) and 0.79" (20mm) per month. The daylight hours decrease to approximately 11.1 hours by November and sunshine hours also fall to around 7 hours.Winter weather in Granby
The winter season starts from December and extends till February. This period experiences the coldest months of the year with temperatures tumbling down to between 4.3°F (-15.4°C) and 33.6°F (0.9°C). The snow blankets almost the entire region, with 5.12" (130mm) to 8.7" (221mm) of snowfall per month. Sunshine hours see a further dip to around 6.4 hours per day by December. Despite the chilly weather, the beauty of the snow-capped surroundings makes for an enchanting sight.Weather in January
January in Granby, Colorado, is characterized by low temperatures, with the lowest monthly average minimum temperature hitting 4.3°F (-15.4°C), generating a crisp and frosty environment. Remaining colder than its succeeding month, the outdoor scenery curls under the blanket of snow, registering the second-highest snowfall of the year. Weather in January »Weather in February
The weather in February sees a slight upswing from January's chill, yet consistently depicts a chilly ambiance as the winter season prolongs. This month brings the most snowfall in the entire year with an average snowfall of 8.7" (221mm). Weather in February »Weather in March
The arrival of March in Granby, Colorado indicates a transition from the intense winter months to an extended Spring season. Temperatures somewhat rise, proffering a more accommodating weather condition compared to the preceding months, with the maximum average temperature scaling to 33.6°F (0.9°C). Weather in March »Weather in April
April identifies itself as one of the transforming periods of the year in Granby creating a noticeable distance from the preceding chilly months. The maximum average temperature further escalates to 40.1°F (4.5°C), signaling a departure from the winter chill. Weather in April »Weather in May
May is a gateway to the upcoming summer season in Granby, bringing along a much-anticipated climb in temperatures. This month acknowledges a transformative leap in temperature, highlighting the maximum average temperature at 52.3°F (11.3°C). Weather in May »Weather in June
June, in Granby, Colorado, stands as the inception of the summer season. This month, being the hottest, boasts a maximum average temperature soaring to 67.5°F (19.7°C). Sunshine prevails for most of the day, ensuring longer daylight hours and reducing humidity levels. Weather in June »Weather in July
July holds its reign as the peak summer month in Granby, producing the highest average temperatures of the year at 72.3°F (22.4°C). While the summer heat maintains its command, the daylight hours draw out further, welcoming more sun into the city. Weather in July »Weather in August
August welcomes a slight downtrend from the heat in Granby, but continues to keep the summer spirit thriving. The month bears the second-highest maximum average temperature, standing ar 71.2°F (21.8°C). The cloud cover reduces concurrently with the descending temperatures while the pleasant breeze continues to persist. Weather in August »Weather in September
September in Granby, Colorado, marks the advent of the fall season, thereby infusing a more calming and serene aura into the cityscape. The temperature sees a considerable retreat from the summer heat, reducing the maximum average temperature to 64.4°F (18°C). Weather in September »Weather in October
The weather in October takes a leap towards the colder side, sharply contrasting the warmer preceding month. The gushing wind speed marks a decent escalation, in addition to the rising cloud coverage, hinting at the approaching winter. Weather in October »Weather in November
The chill becomes apparent during November in Granby, Colorado, allowing the winter vibes to settle firmly into the city. A moderation in wind speed along with the declining temperatures brings along a chilled atmosphere. The city witnesses an accompanying increase in snowfall which covers the city in a white canvas. Weather in November »Weather in December
December personifies the essence of winter in Granby, with the seasonal cheer supplemented by the snowy backdrop and extensive cold. The temperature records the second-lowest for the year, with the minimum average temperature plummeting down to 5°F (-15°C). Weather in December »Updated: Jul 19, 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
In Granby, during the entire year, the rain falls for 96.3 days and collects up to 11.54" (293mm) of precipitation.
Months with snowfall in Granby are January through June, August through December.
In Granby, Colorado, during the entire year, snow falls for 110.7 days and aggregates up to 59.88" (1521mm) of snow.
January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index.
With an average relative humidity of 87%, February is the most humid month.
The month with the least sunshine is February, with an average of 6.2h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
The month with the most snowfall is April, when snow falls for 15.1 days and typically aggregates up to 10.94" (278mm) of snow.
The month with the most rainfall is May, when the rain falls for 12.8 days and typically aggregates up to 1.73" (44mm) of precipitation.
With an average relative humidity of 49%, June is the least humid month.
June has the longest days of the year, with an average of 15h and 0min of daylight.
June through August, with an average maximum UV index of 4, are months with the highest UV index.
Granby reaches its average highest temperatures in July, measuring 72.3°F (22.4°C) at the peak and 43.7°F (6.5°C) at the lowest.
July is the only month when snow does not fall.
The months with the most sunshine are July and August, with an average of 11.8h of sunshine.
August is the month with the least rainfall. Rain falls for 8.8 days and accumulates 0.55" (14mm) of precipitation.
Granby's December weather, with an average high temperature of 24.6°F (-4.1°C) and an average low temperature of 5°F (-15°C), tends to be the coldest of the year.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Granby, CO
The warmest month (with the highest average high temperature) is July (72.3°F).
The month with the lowest average high temperature is December (24.6°F).
The month with the highest average low temperature is July (43.7°F).
The coldest month (with the lowest average low temperature) is January (4.3°F).
Average pressure
Granby, CO
- Average pressure in January:
30.19"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
30.03"Hg - Average pressure in August:
30.03"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.16"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are April, May and June (29.93"Hg).
Average wind speed
Granby, CO
- Average wind speed in January:
6.5mph - Average wind speed in February:
7mph - Average wind speed in March:
6.5mph - Average wind speed in April:
6.7mph - Average wind speed in May:
6.1mph - Average wind speed in June:
6.4mph
- Average wind speed in July:
5.1mph - Average wind speed in August:
5mph - Average wind speed in September:
5.5mph - Average wind speed in October:
6.2mph - Average wind speed in November:
6.4mph - Average wind speed in December:
6.2mph
The windiest month (with the highest average wind speed) is February (7mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity
Granby, CO
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is June (49%).
Average rainfall
Granby, CO
- Average rainfall in January:
0.75" - Average rainfall in February:
1.14" - Average rainfall in March:
0.98" - Average rainfall in April:
1.54" - Average rainfall in May:
1.73" - Average rainfall in June:
1.26"
- Average rainfall in July:
0.94" - Average rainfall in August:
0.55" - Average rainfall in September:
0.59" - Average rainfall in October:
0.79" - Average rainfall in November:
0.59" - Average rainfall in December:
0.67"
The wettest month (with the highest rainfall) is May (1.73").
The driest month (with the least rainfall) is August (0.55").
Average rainfall days
Granby, CO
- Average rainfall days in January:
7.1 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
8.1 days - Average rainfall days in April:
8.7 days - Average rainfall days in May:
12.8 days - Average rainfall days in June:
8.7 days
- Average rainfall days in July:
12.4 days - Average rainfall days in August:
8.8 days - Average rainfall days in September:
7.1 days - Average rainfall days in October:
4.9 days - Average rainfall days in November:
5 days - Average rainfall days in December:
7.4 days
The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is October (4.9 days).
Average snowfall
Granby, CO
- Average snowfall in January:
5.83" - Average snowfall in February:
8.7" - Average snowfall in March:
7.56" - Average snowfall in April:
10.94" - Average snowfall in May:
7.87" - Average snowfall in June:
2.95"
The month with the highest snowfall is April (10.94").
The month with the least snowfall is July (0").
Average snowfall days
Granby, CO
- Average snowfall days in January:
14.3 days - Average snowfall days in February:
16.1 days - Average snowfall days in March:
15.7 days - Average snowfall days in April:
15.1 days - Average snowfall days in May:
12.2 days - Average snowfall days in June:
3.4 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0.2 days - Average snowfall days in September:
2 days - Average snowfall days in October:
9 days - Average snowfall days in November:
9.3 days - Average snowfall days in December:
13.4 days
The month with the highest number of snowfall days is February (16.1 days).
The month with the least snowfall days is July (0 days).
Average daylight / Average sunshine
Granby, CO
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
6h and 18min - Average sunshine in February:
6h and 12min - Average sunshine in March:
8h and 30min - Average sunshine in April:
10h and 0min - Average sunshine in May:
10h and 54min - Average sunshine in June:
11h and 42min
- Average sunshine in July:
11h and 48min - Average sunshine in August:
11h and 48min - Average sunshine in September:
11h and 12min - Average sunshine in October:
7h and 12min - Average sunshine in November:
7h and 0min - Average sunshine in December:
6h and 24min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).
Average sunshine days
Granby, CO
- Average sunshine days in January:
16 days - Average sunshine days in February:
10.8 days - Average sunshine days in March:
12.6 days - Average sunshine days in April:
9.9 days - Average sunshine days in May:
9.5 days - Average sunshine days in June:
14 days
- Average sunshine days in July:
14.4 days - Average sunshine days in August:
16.9 days - Average sunshine days in September:
19.5 days - Average sunshine days in October:
18.3 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
16.8 days
The months with the most sunshine days are September and November (19.5 days).
The month with the least sunshine days is May (9.5 days).
Average UV index
Granby, CO
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover
Granby, CO
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is September (Cloud cover 15).
Average visibility
Granby, CO
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, March, April and December (5mi).
