Climate and monthly weather forecastMeridian, ID
Climate and monthly weather forecast
The climate of Meridian
Meridian, Idaho, USA, falls under the Csb Köppen climate classification, a typical warm summer Mediterranean climate. Located in the Western US, the weather in Meridian varies considerably throughout the year.Analyzing these climatological parameters closely, it is evident that fluctuations are a common phenomenon. Monthly average high temperatures range from 36°F (2.2°C) in January to a comfortable 90.3°F (32.4°C) in July. On the contrary, the lower temperatures fall to 24.6°F (-4.1°C) in December up to 62.2°F (16.8°C) in August.
Humidity levels swing from a low 30% during July and August to a high 79% in January. Rainfall levels typically peak in November and decrease to an almost negligible 0.12" (3mm) in July. The number of rainfall days varies from a high of 16.2 in March to a low of 3.2 in July.
Snowfall occurs mostly between December and February, with December receiving the most snow. Sunshine hours are abundant in the region, with the most extended daylight experienced in June (15.4 hours), decreasing to a low of 9 hours in December.
The best time to visit Meridian
When considering weather parameters, the ideal time to visit Meridian would be between May and August. During these months, high temperatures average between 69.3°F (20.7°C) and 90.3°F (32.4°C), with low humidity levels recorded between 30 and 49%. Moreover, the amount of rainfall in these months ranges only from 0.12" (3mm) to 1.18" (30mm), with visibly fewer days with rain, creating favorable conditions for outdoor activities.The worst time to visit Meridian
On the flip side, the worst time to visit Meridian would arguably be from November to January. During these months, temperatures can drop to a low of 25.2°F (-3.8°C), accompanied by a significant increase in humidity, touching 79% in January. Additionally, the number of daylight hours dwindles to as low as 9 in December. Coupled with decreased visibility, this period presents less appealing conditions for tourists.Spring weather in Meridian
Spring months in Meridian, Idaho, are from March to May. During this period, the weather exhibits a steady increase in warmth, with high temperatures from 51.4°F (10.8°C) moving up to 69.3°F (20.7°C). Concurrently, the humidity levels experience a decrease from 64% to 49%. The days, significantly longer, range from 12 daylight hours in March to 14.7 in May. However, March does see quite a considerable amount of rainfall, with 16.2 days recording rainfall in the month.Summer weather in Meridian
Characterized by warmth and longer daylight hours, summer in Meridian stretches from June to August. The region enjoys high temperatures that peak at 90.3°F (32.4°C) in July and drop to 78.1°F (25.6°C) in August. The humidity levels during this period reach their lowest, between 30 to 43%, making summer days quite comfortable for outdoor activities. Moreover, the rainfall days decrease to a minimum, marking the least rainfall in July at 0.12" (3mm) over 3.2 days.Autumn weather in Meridian
September to November, representing the autumn months, bring a set of cooler temperatures ranging from 78.1°F (25.6°C) to 47.7°F (8.7°C). Humidity starts to rise again during this period, accompanied by an increase in the number of rainfall days, reaching its peak at 16.2 days in November. Despite diminishing daylight hours, the visibility remains clear, and the wind speed stays consistent throughout this season.Winter weather in Meridian
Winter in Meridian, between December and February, is cold with lower temperatures hovering between 24.6°F (-4.1°C) to 29.8°F (-1.2°C). The humidity level rises, reaching 77% in December, contributing to the cold weather. Snowfall is a common phenomenon during these months, with December recording the most snowfall at 4.88" (124mm) over 8.5 days.Weather in January
As the first month of the year unveils, Meridian, Idaho experiences relatively calm weather, albeit quite brisk. Higher humidity levels nearing 79% typically accompany the onset of the new year. Snow is indeed prevalent, with the highest snowfall recorded in January with 4.21" (107mm) falling on average across 6.8 days. Weather in January »Weather in February
Following January, Meridian greets February with similar wintry conditions. However, weather-wise, certain changes start to manifest, with the temperature rising from the low to high 30s°F and a decrease in the volume of snowfall. Weather in February »Weather in March
As winter fades, the weather in Meridian shifts towards spring in March. Notably, temperatures rise to the low 50s°F and snowfall levels drop down to 0.91" (23mm) on average. Humidity levels also decline, resulting in drier conditions. Weather in March »Weather in April
Marking the peak of spring, April ushers in warmer temperatures in Meridian. There's a visible uptick in daylight hours, hitting a high of 13.5 hours on average per day. It further distinguishes itself from March with an absence of snow and less rainfall, along with dropping humidity levels to 54%. Weather in April »Weather in May
With sunshine dominating the sky for about 14.7 hours, May certainly brightens up Meridian. A notable shift away from the brisk weather of earlier months is evident as temperatures soar into the high 60s°F. By the wrap of the month, the citizens brace themselves for the warmer and less humid days that June will bring. Weather in May »Weather in June
In June, summer takes its stance in Meridian, Idaho. Daylight extends to an optimal 15.4 hours, enriching the city with warmth and vibrant sunlight. Winds are considerably steady, with an average speed of 6.2mph (10km/h). The transition to the next month hardly brings drastic differences, as July continues to bask in the heat and sunshine. Weather in June »Weather in July
July resonates strongly with a typical summery atmosphere in Meridian. The striking feature of this month is the high temperature of 90.3°F (32.4°C) recorded, the highest of the entire year. Unsurprisingly, the relative humidity dips to a low 30%, given the soaring heat and sunlit days that can extend up to 15 hours. Weather in July »Weather in August
August remains as another beacon of summer in Meridian's weather calendar. Despite having a slightly shorter daylight span than July, the city enjoys abundant sunlight for about 13.9 hours daily. Meanwhile, temperatures stay stable as the heat of July progresses well into August. Weather in August »Weather in September
Early signs of fall emerge in Meridian with the advent of September. Features of this month encompass a substantial drop in temperatures from the 80s°F down to the high 70s°F, indicative of the change of seasons. Also, September witnesses an increase in rainfall duration compared to the preceding summer months. Weather in September »Weather in October
October in Meridian, Idaho, sees a noticeable amplification of autumnal features. The temperature makes a substantial drop into the 60s°F, and the rainfall duration reaches 0.87" (22mm) on average. Wind conditions remain fairly moderate, with an average speed of 5.7mph (9.2km/h) experienced in Meridian. Weather in October »Weather in November
November signifies the beginning of winter in Meridian. With temperatures dropping to the 40s°F, the city braces for the cold months ahead. The first hints of snow become noticeable, with an average accumulation of 1.26" (32mm). Weather in November »Weather in December
December in Meridian, Idaho, is marked by a true winter ambiance. Engulfed in winter's chill, the city experiences temperatures dropping to the mid 20s°F to high 30s°F. The cityscape gets a white makeover with average snowfall levels peaking at 4.88" (124mm). Weather in December »Updated: Jul 23, 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
The most humid month is January, with an average relative humidity of 79%.
Throughout the year, there are 112.8 rainfall days, and 12.48" (317mm) of precipitation is accumulated.
January through March, November and December are months with snowfall.
In Meridian, during the entire year, snow falls for 27.1 days and aggregates up to 14.45" (367mm) of snow.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
March is the month with the most rainfall. Rain falls for 16.2 days and accumulates 1.97" (50mm) of precipitation.
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.
April through October are months without snowfall.
With an average of 15h and 24min of daylight, June has the longest days of the year.
Meridian experiences its highest temperatures in July, with an average peak of 90.3°F (32.4°C) and a low of 61.7°F (16.5°C).
The months with the lowest humidity are July and August, with an average relative humidity of 30%.
July is the month with the least rainfall. Rain falls for 3.2 days and accumulates 0.12" (3mm) of precipitation.
The month with the most sunshine is July, with an average of 12.1h of sunshine.
The month with the highest UV index is July, with an average maximum UV index of 7.
Meridian's coldest temperatures are experienced in December, with average high temperatures of 36°F (2.2°C) and lows of 24.6°F (-4.1°C).
The month with the most snowfall is December, when snow falls for 8.5 days and typically aggregates up to 4.88" (124mm) of snow.
With an average of 9h and 0min of daylight, December has the shortest days of the year.
December has the least sunshine of the year, with an average of 5.7h of sunshine.
Average temperature
Meridian, ID
The warmest month (with the highest average high temperature) is July (32.4°C).
The month with the lowest average high temperature is December (2.2°C).
The month with the highest average low temperature is August (16.8°C).
The coldest month (with the lowest average low temperature) is December (-4.1°C).
Average pressure
Meridian, ID
- Average pressure in January:
1024.3mbar - Average pressure in February:
1020.3mbar - Average pressure in March:
1017.4mbar - Average pressure in April:
1015.3mbar - Average pressure in May:
1013.3mbar - Average pressure in June:
1012.6mbar
- Average pressure in July:
1013mbar - Average pressure in August:
1012.8mbar - Average pressure in September:
1014mbar - Average pressure in October:
1017.3mbar - Average pressure in November:
1020.3mbar - Average pressure in December:
1023.1mbar
The month with the highest atmospheric pressure is January (1024.3mbar).
The month with the lowest atmospheric pressure is June (1012.6mbar).
Average wind speed
Meridian, ID
- Average wind speed in January:
8.7km/h - Average wind speed in February:
10.3km/h - Average wind speed in March:
11.7km/h - Average wind speed in April:
11.8km/h - Average wind speed in May:
10.5km/h - Average wind speed in June:
10km/h
- Average wind speed in July:
9.2km/h - Average wind speed in August:
8.8km/h - Average wind speed in September:
8.9km/h - Average wind speed in October:
9.2km/h - Average wind speed in November:
9.8km/h - Average wind speed in December:
9.8km/h
The windiest month (with the highest average wind speed) is April (11.8km/h).
The calmest month (with the lowest average wind speed) is January (8.7km/h).
Average humidity
Meridian, ID
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (30%).
Average rainfall
Meridian, ID
The wettest month (with the highest rainfall) is March (50mm).
The driest month (with the least rainfall) is July (3mm).
Average rainfall days
Meridian, ID
- Average rainfall days in January:
11.1 days - Average rainfall days in February:
11.4 days - Average rainfall days in March:
16.2 days - Average rainfall days in April:
13.5 days - Average rainfall days in May:
10.4 days - Average rainfall days in June:
8.7 days
- Average rainfall days in July:
3.2 days - Average rainfall days in August:
3.4 days - Average rainfall days in September:
5.9 days - Average rainfall days in October:
8.5 days - Average rainfall days in November:
10.1 days - Average rainfall days in December:
10.4 days
The month with the highest number of rainy days is March (16.2 days).
The month with the least rainy days is July (3.2 days).
Average snowfall
Meridian, ID
The month with the highest snowfall is December (124mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days
Meridian, ID
- Average snowfall days in January:
6.8 days - Average snowfall days in February:
6.5 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.2 days - Average snowfall days in May:
0.1 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 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
2.6 days - Average snowfall days in December:
8.5 days
The month with the highest number of snowfall days is December (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Meridian, ID
- Average daylight in January:
9h and 24min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 24min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
5h and 48min - Average sunshine in February:
7h and 42min - Average sunshine in March:
7h and 54min - Average sunshine in April:
9h and 30min - Average sunshine in May:
11h and 0min - Average sunshine in June:
11h and 24min
- Average sunshine in July:
12h and 6min - Average sunshine in August:
11h and 24min - Average sunshine in September:
9h and 30min - Average sunshine in October:
8h and 0min - Average sunshine in November:
6h and 36min - Average sunshine in December:
5h and 42min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days
Meridian, ID
- Average sunshine days in January:
16.1 days - Average sunshine days in February:
13.3 days - Average sunshine days in March:
12.3 days - Average sunshine days in April:
14.2 days - Average sunshine days in May:
16.3 days - Average sunshine days in June:
18.8 days
- Average sunshine days in July:
25.4 days - Average sunshine days in August:
24.3 days - Average sunshine days in September:
22.7 days - Average sunshine days in October:
20.6 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
15.6 days
The month with the most sunshine days is July (25.4 days).
The month with the least sunshine days is March (12.3 days).
Average UV index
Meridian, ID
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Meridian, ID
The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 8).
Average visibility
Meridian, ID
The months with the highest visibility are March, April, May, June, July, August, September, October and November (10km).
The months with the lowest visibility are January, February and December (9km).
