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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
Climate and monthly weather forecast
Weather in January
January, the same as December, in Clinton, Illinois, is a freezing cold winter month, with an average temperature fluctuating between 19.9°F (-6.7°C) and 31.8°F (-0.1°C). January brings the lowest temperatures, with an average high of 31.8°F (-0.1°C) and an average low of 19.9°F (-6.7°C). Weather in January »
Weather in February
February, the last month of the winter in Clinton, is a wintry month, with an average temperature fluctuating between 36.9°F (2.7°C) and 23.7°F (-4.6°C). The introduction of February notes a subtle temperature variation to a wintry 36.9°F (2.7°C) from January's 31.8°F (-0.1°C). Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Clinton, Illinois, with an average temperature varying between 49.5°F (9.7°C) and 34.9°F (1.6°C). The rise of average high-temperatures is seen in March, with an increase from a wintry 36.9°F (2.7°C) in February to a frosty 49.5°F (9.7°C). Weather in March »
Weather in April
April in Clinton, Illinois, is a refreshing spring month, with an average temperature ranging between min 45.5°F (7.5°C) and max 61.5°F (16.4°C). April sees a temperature increase, moving from a frosty 49.5°F (9.7°C) in March to an enjoyable 61.5°F (16.4°C). Weather in April »
Weather in May
May, the last month of the spring in Clinton, is an agreeable month, with an average temperature fluctuating between 72.1°F (22.3°C) and 55.9°F (13.3°C). The shift from April to May sees an increase in the average high-temperature, transitioning from an enjoyable 61.5°F (16.4°C) to a pleasant 72.1°F (22.3°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Clinton, Illinois, with an average temperature varying between 63.9°F (17.7°C) and 80.1°F (26.7°C). With the onset of June, Clinton observes a minor temperature ascent, with the average high-temperature adjusting from May's agreeable 72.1°F (22.3°C) to a moderately hot 80.1°F (26.7°C). Weather in June »
Weather in July
July, like June, in Clinton, Illinois, is another warm summer month, with temperature in the range of an average low of 65.1°F (18.4°C) and an average high of 81.3°F (27.4°C). The month of July sees the highest average temperatures, reaching 81.3°F (27.4°C) at the peak and 65.1°F (18.4°C) at the low. In July, the average heat index is appraised at a tropical 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Clinton, Illinois, with an average temperature ranging between min 63.5°F (17.5°C) and max 81°F (27.2°C). With the arrival of August, Clinton's average high-temperature registers at a still moderately hot 81°F (27.2°C), indicating a subtle variation from the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Clinton, is also a moderately hot month, with temperature in the range of an average high of 76.3°F (24.6°C) and an average low of 58.3°F (14.6°C). Clinton starts September with an average high-temperature of a still warm 76.3°F (24.6°C), a minor shift from August's 81°F (27.2°C). Weather in September »
Weather in October
October, like September, in Clinton, Illinois, is another enjoyable autumn month, with an average temperature varying between 47.3°F (8.5°C) and 63.1°F (17.3°C). October shows a mild decline in the average high-temperature, falling from September's warm 76.3°F (24.6°C) to a comfortable 63.1°F (17.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Clinton, Illinois, with an average temperature varying between 49.1°F (9.5°C) and 35.4°F (1.9°C). A change in temperatures is noted as October gives way to November, with average highs reducing from a refreshing 63.1°F (17.3°C) to a frosty 49.1°F (9.5°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Clinton, Illinois, with temperature in the range of an average low of 27.3°F (-2.6°C) and an average high of 37.6°F (3.1°C). The commencement of December indicates a shift in the average high-temperature, receding from November's frosty 49.1°F (9.5°C) to a cold 37.6°F (3.1°C). Weather in December »
Updated: Jun 24, 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 is the coldest month?
Clinton's coldest weather arrives in January, when temperatures average a high of 31.8°F (-0.1°C) and a low of 19.9°F (-6.7°C).
How many days does it rain?
In Clinton, during the entire year, the rain falls for 165.4 days and collects up to 33.78" (858mm) of precipitation.
When does it snow?
January through April, October through December are months with snowfall.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 12 days and accumulates 4.49" (114mm) of snow.
How many days does it snow?
Throughout the year, there are 36.9 snowfall days, and 14.76" (375mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 3.9h of sunshine.
What is the month with the lowest UV index?
The months with the lowest UV index are January, February, November 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?
May is the month with the most rainfall. Rain falls for 20.2 days and accumulates 4.37" (111mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
When are the longest days in Clinton?
With an average of 15h and 0min of daylight, June has the longest days of the year in Clinton, Illinois.
What month has the most sunshine?
The month with the most sunshine in Clinton is June, with an average of 10.1h of sunshine.
When is the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What is the warmest month in Clinton?
Temperature records mark July as the warmest month, with highs averaging 81.3°F (27.4°C) and lows at 65.1°F (18.4°C).
What is the most humid month?
The most humid month is July, with an average relative humidity of 85%.
What is the least humid month?
With an average relative humidity of 70%, October is the least humid month.
What is the driest month?
The month with the least rainfall is December, when the rain falls for 9.5 days and typically collects 1.89" (48mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 24min of daylight.
Average temperature
Clinton, IL
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.8°F).
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure
Clinton, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"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:
30.02"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Clinton, IL
- Average wind speed in January:
10.8mph - Average wind speed in February:
10.7mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.5mph - Average wind speed in October:
9.6mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10.2mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Clinton, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Clinton, IL
- Average rainfall in January:
2.13" - Average rainfall in February:
2.01" - Average rainfall in March:
2.64" - Average rainfall in April:
3.7" - Average rainfall in May:
4.37" - Average rainfall in June:
3.86"
- Average rainfall in July:
3.07" - Average rainfall in August:
2.95" - Average rainfall in September:
2.24" - Average rainfall in October:
2.76" - Average rainfall in November:
2.17" - Average rainfall in December:
1.89"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is December (1.89").
Average rainfall days
Clinton, IL
- Average rainfall days in January:
7.8 days - Average rainfall days in February:
6.8 days - Average rainfall days in March:
14 days - Average rainfall days in April:
16.7 days - Average rainfall days in May:
20.2 days - Average rainfall days in June:
18.6 days
- Average rainfall days in July:
20.2 days - Average rainfall days in August:
16.7 days - Average rainfall days in September:
13.4 days - Average rainfall days in October:
12 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
9.5 days
The months with the highest number of rainy days are May and July (20.2 days).
The month with the least rainy days is February (6.8 days).
Average snowfall
Clinton, IL
The month with the highest snowfall is January (4.49").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Clinton, IL
- Average snowfall days in January:
12 days - Average snowfall days in February:
9 days - Average snowfall days in March:
3.7 days - Average snowfall days in April:
1.2 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:
0.3 days - Average snowfall days in November:
2.7 days - Average snowfall days in December:
8 days
The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Clinton, 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 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - 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 0min - Average daylight in December:
9h and 2min
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:
3h and 5min - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 0min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Clinton, IL
- Average sunshine days in January:
13.8 days - Average sunshine days in February:
13.8 days - Average sunshine days in March:
13.5 days - Average sunshine days in April:
10.9 days - Average sunshine days in May:
8.3 days - Average sunshine days in June:
8.8 days
- Average sunshine days in July:
7.3 days - Average sunshine days in August:
11.3 days - Average sunshine days in September:
13.8 days - Average sunshine days in October:
16.5 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 November (17.5 days).
The month with the least sunshine days is July (7.3 days).
Average UV index
Clinton, IL
The months with the highest UV index are 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
Clinton, IL
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility
Clinton, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).