Expand
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, in Somonauk, Illinois, is a freezing cold winter month, with temperature in the range of an average low of 15.6°F (-9.1°C) and an average high of 27.5°F (-2.5°C). The coldest temperatures occur during January, when averages reach a peak of 27.5°F (-2.5°C) and a low of 15.6°F (-9.1°C). Weather in January »
Weather in February
February, the last month of the winter in Somonauk, is an icy month, with an average temperature varying between 32°F (0°C) and 18.9°F (-7.3°C). Shifting into February, Somonauk records an average high-temperature of an icy 32°F (0°C), presenting minor fluctuations compared to the previous month. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Somonauk, Illinois, with an average temperature ranging between max 45.7°F (7.6°C) and min 31.1°F (-0.5°C). The start of March brings a rise in the average high-temperature, moving from an icy 32°F (0°C) in February to a frosty 45.7°F (7.6°C). Weather in March »
Weather in April
April is a refreshing spring month in Somonauk, Illinois, with temperature in the range of an average high of 57°F (13.9°C) and an average low of 40.8°F (4.9°C). Somonauk's weather shows a temperature rise with the arrival of April, moving from a chilly 45.7°F (7.6°C) in March to a refreshing 57°F (13.9°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Somonauk, Illinois, with an average temperature fluctuating between 69.3°F (20.7°C) and 52.2°F (11.2°C). Somonauk in May experiences an increase in the average high-temperature, moving from April's refreshing 57°F (13.9°C) to an agreeable 69.3°F (20.7°C). Weather in May »
Weather in June
June, the first month of the summer in Somonauk, is a moderately hot month, with an average temperature varying between 78.1°F (25.6°C) and 60.6°F (15.9°C). Somonauk's transition into June is noticed by a slight rise in the average high-temperature, advancing from an agreeable 69.3°F (20.7°C) in May to a warm 78.1°F (25.6°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Somonauk, Illinois, with temperature in the range of an average high of 80.6°F (27°C) and an average low of 63.3°F (17.4°C). July brings the highest temperatures, with an average high of 80.6°F (27°C) and an average low of 63.3°F (17.4°C). The average heat index in July is computed to be a hot 86°F (30°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Somonauk, Illinois, with an average temperature fluctuating between 61.5°F (16.4°C) and 79°F (26.1°C). Stepping into August, Somonauk records an average high-temperature of a still warm 79°F (26.1°C), almost consistent with July. Weather in August »
Weather in September
September, the first month of the autumn in Somonauk, is also a moderately hot month, with an average temperature ranging between max 73.8°F (23.2°C) and min 55.4°F (13°C). Somonauk records an average high-temperature of a still moderately hot 73.8°F (23.2°C) as September arrives, nearly mirroring the previous month's climate. Weather in September »
Weather in October
October, like September, is a moderate autumn month in Somonauk, Illinois, with temperature in the range of an average low of 44.8°F (7.1°C) and an average high of 60.3°F (15.7°C). Observing a mild shift, the average high-temperature during October reduces from September's moderately hot 73.8°F (23.2°C) to a mild 60.3°F (15.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Somonauk, is another chilly month, with an average temperature fluctuating between 45.5°F (7.5°C) and 32.9°F (0.5°C). As Somonauk transitions into November, a marked decrease in the average high-temperature is observed, dropping from a moderate 60.3°F (15.7°C) in October to a frosty 45.5°F (7.5°C). Weather in November »
Weather in December
December, the first month of the winter in Somonauk, is still a cold month, with an average temperature ranging between max 34.2°F (1.2°C) and min 23.9°F (-4.5°C). Somonauk experiences a temperature shift at the start of December, with average high-temperatures adjusting from a frosty 45.5°F (7.5°C) in November to a cold 34.2°F (1.2°C). Weather in December »
[Resources]Frequently asked questions
What month is the coldest in Somonauk?
Somonauk's coldest month, January, generally records average temperatures ranging from a high of 27.5°F (-2.5°C) to a low of 15.6°F (-9.1°C).
What is the driest month in Somonauk?
The month with the least rainfall in Somonauk is January, when the rain falls for 5.5 days and typically collects 1.69" (43mm) of precipitation.
How many days does it rain in Somonauk?
In Somonauk, Illinois, during the entire year, the rain falls for 162.1 days and collects up to 33.54" (852mm) of precipitation.
When does it snow in Somonauk?
January through April, October through December are months with snowfall in Somonauk.
What is the snowiest month in Somonauk?
January is the month with the most snowfall. Snow falls for 12.3 days and accumulates 4.61" (117mm) of snow.
How many days does it snow in Somonauk?
In Somonauk, during the entire year, snow falls for 43.6 days and aggregates up to 16.73" (425mm) of snow.
What is the month with the least sunshine in Somonauk?
With an average of 3.9h of sunshine, January has the least sunshine of the year in Somonauk.
What is the month with the lowest UV index in Somonauk?
The months with the lowest UV index in Somonauk are January and December, with an average maximum UV index of 1.
When is Daylight Saving Time (DST) in Somonauk?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Somonauk, 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 in Somonauk?
The month with the most rainfall is May, when the rain falls for 18.9 days and typically aggregates up to 4.49" (114mm) of precipitation.
When it does not snow in Somonauk?
May through September are months without snowfall.
When are the longest days in Somonauk?
June has the longest days of the year, with an average of 15h and 6min of daylight.
What are the months with the most sunshine in Somonauk?
The months with the most sunshine in Somonauk are June through August, with an average of 9.6h of sunshine.
When is the highest UV index in Somonauk?
The months with the highest UV index in Somonauk, Illinois, are June and August, with an average maximum UV index of 6.
What are the warmest months in Somonauk?
July, on average, is the warmest month in Somonauk, registering a high temperature of 80.6°F (27°C) and a low of 63.3°F (17.4°C).
What is the most humid month in Somonauk?
July is the most humid month in Somonauk, Illinois, with an average relative humidity of 85%.
What is the least humid month in Somonauk?
The least humid month is October, with an average relative humidity of 74%.
What is the month with the shortest days in Somonauk?
With an average of 9h and 12min of daylight, December has the shortest days of the year in Somonauk, Illinois.
Average temperature
Somonauk, IL
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (27.5°F).
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure
Somonauk, IL
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Somonauk, IL
- Average wind speed in January:
9.8mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.6mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.4mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6mph - Average wind speed in September:
7mph - Average wind speed in October:
8.8mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.2mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity
Somonauk, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Somonauk, IL
- Average rainfall in January:
1.69" - Average rainfall in February:
1.77" - Average rainfall in March:
2.05" - Average rainfall in April:
3.94" - Average rainfall in May:
4.49" - Average rainfall in June:
4.25"
- Average rainfall in July:
3.58" - Average rainfall in August:
2.99" - Average rainfall in September:
2.4" - Average rainfall in October:
2.87" - Average rainfall in November:
1.73" - Average rainfall in December:
1.77"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is January (1.69").
Average rainfall days
Somonauk, IL
- Average rainfall days in January:
5.5 days - Average rainfall days in February:
5.7 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
17.3 days - Average rainfall days in May:
18.9 days - Average rainfall days in June:
19.3 days
- Average rainfall days in July:
19.3 days - Average rainfall days in August:
17.6 days - Average rainfall days in September:
13.8 days - Average rainfall days in October:
13.5 days - Average rainfall days in November:
10.4 days - Average rainfall days in December:
8 days
The months with the highest number of rainy days are June and July (19.3 days).
The month with the least rainy days is January (5.5 days).
Average snowfall
Somonauk, IL
The month with the highest snowfall is January (4.61").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Somonauk, IL
- Average snowfall days in January:
12.3 days - Average snowfall days in February:
10.8 days - Average snowfall days in March:
6.1 days - Average snowfall days in April:
1.6 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:
0.4 days - Average snowfall days in November:
3.4 days - Average snowfall days in December:
8.9 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Somonauk, IL
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
9h and 4min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The months with the most sunshine are June, July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Somonauk, IL
- Average sunshine days in January:
15.4 days - Average sunshine days in February:
12.5 days - Average sunshine days in March:
14.2 days - Average sunshine days in April:
9.7 days - Average sunshine days in May:
9.7 days - Average sunshine days in June:
8.9 days
- Average sunshine days in July:
8.2 days - Average sunshine days in August:
10.1 days - Average sunshine days in September:
13.5 days - Average sunshine days in October:
15.3 days - Average sunshine days in November:
17 days - Average sunshine days in December:
15.6 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is July (8.2 days).
Average UV index
Somonauk, IL
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Somonauk, IL
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility
Somonauk, IL
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Somonauk, Illinois, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location
