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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, the same as December, is another cold winter month in Somerset, Illinois, with an average temperature ranging between max 39.7°F (4.3°C) and min 26.2°F (-3.2°C). Somerset's coldest weather arrives in January, when temperatures average a high of 39.7°F (4.3°C) and a low of 26.2°F (-3.2°C). Weather in January »
Weather in February
The last month of the winter, February, is a frosty month in Somerset, Illinois, with an average temperature ranging between min 30.2°F (-1°C) and max 44.1°F (6.7°C). February notes an average high-temperature of a frosty 44.1°F (6.7°C), subtly differing from January's 39.7°F (4.3°C). Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Somerset, Illinois, with an average temperature varying between 39.2°F (4°C) and 55°F (12.8°C). March signals a shift in the average high-temperature, moving from February's chilly 44.1°F (6.7°C) to a fresh 55°F (12.8°C). Weather in March »
Weather in April
April is a refreshing spring month in Somerset, Illinois, with an average temperature ranging between max 66.4°F (19.1°C) and min 48.7°F (9.3°C). The arrival of April brings a change in Somerset's weather, with average high-temperatures moving from March's cool 55°F (12.8°C) to an enjoyable 66.4°F (19.1°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Somerset, Illinois, with an average temperature ranging between max 75.6°F (24.2°C) and min 58.1°F (14.5°C). The arrival of May brings an increase in high-temperatures, moving from an enjoyable 66.4°F (19.1°C) in April to a warm 75.6°F (24.2°C). Weather in May »
Weather in June
The first month of the summer, June, is still a warm month in Somerset, Illinois, with an average temperature varying between 66.2°F (19°C) and 84.7°F (29.3°C). Noticing a change, the average high-temperature during June moves from May's warm 75.6°F (24.2°C) to a still moderately hot 84.7°F (29.3°C). Weather in June »
Weather in July
July in Somerset, Illinois, is a hot summer month, with an average temperature fluctuating between 87.3°F (30.7°C) and 68.5°F (20.3°C). The warmest time of the year is July, with temperatures averaging a high of 87.3°F (30.7°C) and a low of 68.5°F (20.3°C). Throughout July, the heat index is calculated to be a sweltering 102.2°F (39°C). Weather in July »
Weather in August
August, the last month of the summer in Somerset, is another warm month, with temperature in the range of an average high of 85.6°F (29.8°C) and an average low of 66°F (18.9°C). The onset of August brings with it an average high-temperature of a moderately hot 85.6°F (29.8°C), showing a negligible variation from the month before. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Somerset, Illinois, with an average temperature varying between 60.4°F (15.8°C) and 80.8°F (27.1°C). Somerset's September average high-temperature settles at a still moderately hot 80.8°F (27.1°C), showing a near match with the preceding month. Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Somerset, Illinois, with an average temperature fluctuating between 67.8°F (19.9°C) and 49.3°F (9.6°C). The start of October involves a temperature drop, moving from a warm 80.8°F (27.1°C) in September to a refreshing 67.8°F (19.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Somerset, Illinois, with an average temperature fluctuating between 38.7°F (3.7°C) and 53.8°F (12.1°C). Onset of November comes with a temperature decline, the average high falling from an enjoyable 67.8°F (19.9°C) in October to a cool 53.8°F (12.1°C). Weather in November »
Weather in December
December, the first month of the winter in Somerset, is also a frosty month, with an average temperature varying between 32.4°F (0.2°C) and 44.1°F (6.7°C). With December's arrival, Somerset's weather changes as the average high-temperature falls from a fresh 53.8°F (12.1°C) in November to a frosty 44.1°F (6.7°C). Weather in December »
Updated: Jun 21, 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 month is the coldest?
January, noted for its average high-temperature of 39.7°F (4.3°C) and an average low-temperature of 26.2°F (-3.2°C), is considered the coldest month.
How much does it rain?
Throughout the year, there are 158.6 rainfall days, and 36.02" (915mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through April, October through December.
When does it snow the most?
January is the month with the most snowfall in Somerset. Snow falls for 5.3 days and accumulates 1.73" (44mm) of snow.
How many days does it snow?
In Somerset, during the entire year, snow falls for 17.7 days and aggregates up to 6.57" (167mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 4.6h of sunshine.
When is the lowest UV index?
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2.
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 16.6 days and accumulates 4.8" (122mm) of precipitation.
What is the most humid month?
With an average relative humidity of 79%, May is the most humid month in Somerset.
When it does not snow?
May through September are months without snowfall.
What are the months with the highest UV index?
The months with the highest UV index in Somerset are May through August, with an average maximum UV index of 6.
When are the longest days in Somerset?
June has the longest days of the year, with an average of 14h and 42min of daylight.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 10.6h of sunshine.
What is the hottest time of year?
July, with an average high of 87.3°F (30.7°C) and a low of 68.5°F (20.3°C), signifies the warmest month of the year.
What is the driest month in Somerset?
The month with the least rainfall is September, when the rain falls for 10.5 days and typically collects 1.57" (40mm) 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?
The month with the shortest days in Somerset is December, with an average of 9h and 36min of daylight.
Average temperature
Somerset, IL
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39.7°F).
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure
Somerset, 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:
29.98"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
Somerset, IL
- Average wind speed in January:
9.4mph - Average wind speed in February:
9.4mph - Average wind speed in March:
9.3mph - Average wind speed in April:
9.3mph - Average wind speed in May:
7.8mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
5.8mph - Average wind speed in September:
6.4mph - Average wind speed in October:
8mph - Average wind speed in November:
8.5mph - Average wind speed in December:
8.8mph
The windiest months (with the highest average wind speed) are January and February (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity
Somerset, IL
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Somerset, IL
- Average rainfall in January:
2.68" - Average rainfall in February:
2.8" - Average rainfall in March:
3.39" - Average rainfall in April:
4.8" - Average rainfall in May:
3.86" - Average rainfall in June:
3.46"
- Average rainfall in July:
2.87" - Average rainfall in August:
2.52" - Average rainfall in September:
1.57" - Average rainfall in October:
2.64" - Average rainfall in November:
2.64" - Average rainfall in December:
2.8"
The wettest month (with the highest rainfall) is April (4.8").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days
Somerset, IL
- Average rainfall days in January:
9.8 days - Average rainfall days in February:
10.8 days - Average rainfall days in March:
15.4 days - Average rainfall days in April:
16.6 days - Average rainfall days in May:
18.5 days - Average rainfall days in June:
15.6 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
9.7 days - Average rainfall days in December:
10.3 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is November (9.7 days).
Average snowfall
Somerset, IL
The month with the highest snowfall is January (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Somerset, IL
- Average snowfall days in January:
5.3 days - Average snowfall days in February:
5.1 days - Average snowfall days in March:
1.8 days - Average snowfall days in April:
0.6 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:
1.2 days - Average snowfall days in December:
3.6 days
The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Somerset, 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 1min - Average daylight in June:
14h and 4min
- 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 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 4min - 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 4min - 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 36min).
Average sunshine days
Somerset, IL
- Average sunshine days in January:
16.2 days - Average sunshine days in February:
13.1 days - Average sunshine days in March:
12.6 days - Average sunshine days in April:
11.5 days - Average sunshine days in May:
9.9 days - Average sunshine days in June:
12.1 days
- Average sunshine days in July:
12.2 days - Average sunshine days in August:
15 days - Average sunshine days in September:
17.1 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
17.7 days - Average sunshine days in December:
16.9 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is May (9.9 days).
Average UV index
Somerset, 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 and December (UV index 2).
Average cloud cover
Somerset, IL
The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are June and September (Cloud cover 28).
Average visibility
Somerset, 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).
Somerset, Illinois, USA
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