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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, in West Salem, Illinois, is an icy winter month, with an average temperature ranging between max 37.8°F (3.2°C) and min 25°F (-3.9°C). West Salem's January weather, marked by an average high temperature of 37.8°F (3.2°C) and an average low temperature of 25°F (-3.9°C), is the coldest in the year. Weather in January »
Weather in February
The last month of the winter, February, is a chilly month in West Salem, Illinois, with an average temperature fluctuating between 42.8°F (6°C) and 29.1°F (-1.6°C). The arrival of February marks a slight shift to an average high-temperature of a frosty 42.8°F (6°C) from January's 37.8°F (3.2°C). Weather in February »
Weather in March
The first month of the spring, March, is a cool month in West Salem, Illinois, with an average temperature ranging between min 38.5°F (3.6°C) and max 54.1°F (12.3°C). March marks a rise in the average high-temperature, moving from February's chilly 42.8°F (6°C) to a cool 54.1°F (12.3°C). Weather in March »
Weather in April
April is a comfortable spring month in West Salem, Illinois, with an average temperature fluctuating between 48.6°F (9.2°C) and 64.9°F (18.3°C). The shift from March to April sees an increase in the average high-temperature, transitioning from a fresh 54.1°F (12.3°C) to a comfortable 64.9°F (18.3°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in West Salem, Illinois, with temperature in the range of an average low of 58.1°F (14.5°C) and an average high of 74.5°F (23.6°C). May brings a temperature increase, with average high-temperatures moving from April's refreshing 64.9°F (18.3°C) to a warm 74.5°F (23.6°C). Weather in May »
Weather in June
The first month of the summer, June, is still a warm month in West Salem, Illinois, with temperature in the range of an average high of 82.9°F (28.3°C) and an average low of 66.6°F (19.2°C). The onset of June marks a slight increase in the average high-temperature, moving from a warm 74.5°F (23.6°C) in May to a still moderately hot 82.9°F (28.3°C). Weather in June »
Weather in July
July, like June, in West Salem, Illinois, is a moderately hot summer month, with temperature in the range of an average low of 67.6°F (19.8°C) and an average high of 84.7°F (29.3°C). In West Salem, the highest average temperatures are observed in July, with a high of 84.7°F (29.3°C) and a low of 67.6°F (19.8°C). In July, the heat index is evaluated at a very hot 96.8°F (36°C). Weather in July »
Weather in August
August, the last month of the summer in West Salem, is also a moderately hot month, with temperature in the range of an average low of 65.8°F (18.8°C) and an average high of 83.8°F (28.8°C). West Salem's average high-temperature in August is a still moderately hot 83.8°F (28.8°C), marking an insignificant difference from the 84.7°F (29.3°C) of July. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in West Salem, Illinois, with an average temperature ranging between max 79.2°F (26.2°C) and min 60.8°F (16°C). September observes an average high-temperature of a still moderately hot 79.2°F (26.2°C), marking an insignificant difference from August's 83.8°F (28.8°C). Weather in September »
Weather in October
October, like September, in West Salem, Illinois, is another comfortable autumn month, with an average temperature varying between 49.6°F (9.8°C) and 66.7°F (19.3°C). October's arrival coincides with a drop in the average high-temperature, decreasing from September's moderately hot 79.2°F (26.2°C) to a refreshing 66.7°F (19.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in West Salem, Illinois, with an average temperature varying between 38.3°F (3.5°C) and 52.9°F (11.6°C). The onset of November comes with a shift in the average high-temperature, falling from a refreshing 66.7°F (19.3°C) in October to a fresh 52.9°F (11.6°C). Weather in November »
Weather in December
The first month of the winter, December, is still a chilly month in West Salem, Illinois, with an average temperature fluctuating between 31.3°F (-0.4°C) and 43.2°F (6.2°C). West Salem's weather in December involves a decrease in the average high-temperature, moving down from November's cool 52.9°F (11.6°C) to a frosty 43.2°F (6.2°C). Weather in December »
Updated: Aug 27, 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
What are the coldest months?
January is the coldest month, with an average high-temperature of 37.8°F (3.2°C) and an average low-temperature of 25°F (-3.9°C).
How much does it rain?
Throughout the year, there are 109.3 rainfall days, and 10.83" (275mm) of precipitation is accumulated.
When does it snow?
January through March, November and December are months with snowfall.
What is the snowiest month in West Salem?
The month with the most snowfall is January, when snow falls for 3.8 days and typically aggregates up to 0.39" (10mm) of snow.
How much does it snow?
Throughout the year, there are 12.4 snowfall days, and 1.38" (35mm) of snow is accumulated.
What is the month with the least sunshine?
With an average of 4.4h of sunshine, January has the least sunshine of the year in West Salem.
When is the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
What is the rainiest month?
April is the month with the most rainfall. Rain falls for 11.5 days and accumulates 1.3" (33mm) of precipitation.
When it does not snow?
April through October are months without snowfall.
When is the highest UV index?
May through August, with an average maximum UV index of 6, are months with the highest UV index.
When are the longest days?
The month with the longest days is June, with an average of 14h and 48min of daylight.
What month has the most sunshine?
With an average of 10.6h of sunshine, June has the most sunshine of the year.
What part of the year is the hottest?
July is the warmest month, exhibiting average temperatures of 84.7°F (29.3°C) at the peak and 67.6°F (19.8°C) at the base.
What is the most humid month?
July is the most humid month, with an average relative humidity of 80%.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 8.5 days and typically collects 0.47" (12mm) of precipitation.
What is the least humid month?
October is the least humid month, with an average relative humidity of 70%.
What is the month with the shortest days?
With an average of 9h and 30min of daylight, December has the shortest days of the year.
Average temperature
West Salem, IL
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (37.8°F).
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25°F).
Average pressure
West Salem, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
West Salem, IL
- Average wind speed in January:
10.1mph - Average wind speed in February:
10.1mph - Average wind speed in March:
10mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.4mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
5.9mph - Average wind speed in August:
6mph - Average wind speed in September:
6.8mph - Average wind speed in October:
8.6mph - Average wind speed in November:
9.2mph - Average wind speed in December:
9.4mph
The windiest months (with the highest average wind speed) are January and February (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity
West Salem, IL
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (70%).
Average rainfall
West Salem, IL
- Average rainfall in January:
0.75" - Average rainfall in February:
0.75" - Average rainfall in March:
0.94" - Average rainfall in April:
1.3" - Average rainfall in May:
1.1" - Average rainfall in June:
1.22"
- Average rainfall in July:
1.1" - Average rainfall in August:
0.94" - Average rainfall in September:
0.47" - Average rainfall in October:
0.83" - Average rainfall in November:
0.67" - Average rainfall in December:
0.75"
The wettest month (with the highest rainfall) is April (1.3").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days
West Salem, IL
- Average rainfall days in January:
5.1 days - Average rainfall days in February:
6.5 days - Average rainfall days in March:
9.8 days - Average rainfall days in April:
11.5 days - Average rainfall days in May:
14 days - Average rainfall days in June:
11.7 days
- Average rainfall days in July:
12.7 days - Average rainfall days in August:
10.5 days - Average rainfall days in September:
8.5 days - Average rainfall days in October:
6.2 days - Average rainfall days in November:
6.2 days - Average rainfall days in December:
6.6 days
The month with the highest number of rainy days is May (14 days).
The month with the least rainy days is January (5.1 days).
Average snowfall
West Salem, IL
The month with the highest snowfall is January (0.39").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
West Salem, IL
- Average snowfall days in January:
3.8 days - Average snowfall days in February:
3.6 days - Average snowfall days in March:
1.8 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0 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:
0.8 days - Average snowfall days in December:
2 days
The month with the highest number of snowfall days is January (3.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
West Salem, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 3min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 3min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 4min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 1min - Average sunshine in October:
6h and 4min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
West Salem, IL
- Average sunshine days in January:
23 days - Average sunshine days in February:
18.8 days - Average sunshine days in March:
18.4 days - Average sunshine days in April:
16.8 days - Average sunshine days in May:
14.3 days - Average sunshine days in June:
14.3 days
- Average sunshine days in July:
15.2 days - Average sunshine days in August:
16.8 days - Average sunshine days in September:
19.1 days - Average sunshine days in October:
23.2 days - Average sunshine days in November:
21.5 days - Average sunshine days in December:
22.4 days
The month with the most sunshine days is October (23.2 days).
The months with the least sunshine days are May and June (14.3 days).
Average UV index
West Salem, IL
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
West Salem, IL
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility
West Salem, IL
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
West Salem, Illinois, USA
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