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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 a wintry winter month in Chesterfield, Illinois, with an average temperature fluctuating between 22.5°F (-5.3°C) and 34.9°F (1.6°C). With average temperatures fluctuating between a high of 34.9°F (1.6°C) and a low of 22.5°F (-5.3°C), January stands out as the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is also an icy month in Chesterfield, Illinois, with an average temperature ranging between min 26.1°F (-3.3°C) and max 39.4°F (4.1°C). Shifting into February, Chesterfield records an average high-temperature of a still icy 39.4°F (4.1°C), presenting minor fluctuations compared to the previous month. Weather in February »
Weather in March
March, the first month of the spring in Chesterfield, is a cool month, with temperature in the range of an average high of 52.2°F (11.2°C) and an average low of 36.5°F (2.5°C). Chesterfield sees an increase in average high-temperatures during March, moving from a wintry 39.4°F (4.1°C) in February to a cool 52.2°F (11.2°C). Weather in March »
Weather in April
April is a comfortable spring month in Chesterfield, Illinois, with an average temperature fluctuating between 46.4°F (8°C) and 63.9°F (17.7°C). A shift in the average high-temperature is noticeable in April, changing from a cool 52.2°F (11.2°C) in March to a comfortable 63.9°F (17.7°C). Weather in April »
Weather in May
May, the last month of the spring in Chesterfield, is a warm month, with an average temperature varying between 56.8°F (13.8°C) and 73.6°F (23.1°C). Chesterfield sees an increase in average high-temperatures during May, moving from an enjoyable 63.9°F (17.7°C) in April to a moderately hot 73.6°F (23.1°C). Weather in May »
Weather in June
June, the first month of the summer in Chesterfield, is also a moderately hot month, with temperature in the range of an average low of 65.1°F (18.4°C) and an average high of 81.9°F (27.7°C). Observing a slight rise in June, the average high-temperature shifts from May's warm 73.6°F (23.1°C) to a still moderately hot 81.9°F (27.7°C). Weather in June »
Weather in July
July, like June, in Chesterfield, Illinois, is another warm summer month, with an average temperature varying between 83.8°F (28.8°C) and 66.9°F (19.4°C). July is the month when Chesterfield's temperatures reach their peak, with averages of 83.8°F (28.8°C) and lows of 66.9°F (19.4°C). The heat index value during July is calculated to be a fiery hot 95°F (35°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Chesterfield, Illinois, with an average temperature fluctuating between 82.6°F (28.1°C) and 64.9°F (18.3°C). The arrival of August is marked by an average high-temperature of a still warm 82.6°F (28.1°C), bearing a close resemblance to July. Weather in August »
Weather in September
September, the first month of the autumn in Chesterfield, is also a moderately hot month, with an average temperature ranging between min 59.4°F (15.2°C) and max 77.9°F (25.5°C). The average high-temperature in September, at a still moderately hot 77.9°F (25.5°C), reveals a modest deviation from August's 82.6°F (28.1°C). Weather in September »
Weather in October
October, like September, in Chesterfield, Illinois, is another enjoyable autumn month, with temperature in the range of an average low of 48.2°F (9°C) and an average high of 64.8°F (18.2°C). The arrival of October corresponds with a reduction in the average high-temperature, down from September's warm 77.9°F (25.5°C) to an enjoyable 64.8°F (18.2°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Chesterfield, Illinois, with an average temperature fluctuating between 36.5°F (2.5°C) and 51.6°F (10.9°C). In Chesterfield, the beginning of November is marked by a lowered average high-temperature, shifting from October's enjoyable 64.8°F (18.2°C) to a fresh 51.6°F (10.9°C). Weather in November »
Weather in December
December, the first month of the winter in Chesterfield, is also a wintry month, with an average temperature varying between 28.8°F (-1.8°C) and 40.1°F (4.5°C). December brings a decrease in the average high-temperature, shifting from a cool 51.6°F (10.9°C) in November to an icy 40.1°F (4.5°C). Weather in December »
[Resources]Frequently asked questions
What are the coldest months in Chesterfield?
January tends to be the coldest month, with temperatures averaging a daily high of 34.9°F (1.6°C) and a low of 22.5°F (-5.3°C).
What is the driest month in Chesterfield?
January and February are months with the least rain when the rain falls for 6.3 days and typically aggregates up to 1.22" (31mm) of rain.
How many days does it rain in Chesterfield?
Throughout the year, in Chesterfield, there are 138.2 rainfall days, and 23.31" (592mm) of precipitation is accumulated.
When does it snow in Chesterfield?
January through March, November and December are months with snowfall.
How many days does it snow in Chesterfield?
Throughout the year, there are 21.2 snowfall days, and 6.65" (169mm) of snow is accumulated.
What is the month with the least sunshine in Chesterfield?
January has the least sunshine of the year, with an average of 4.4h of sunshine.
What are the months with the lowest UV index in Chesterfield?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the snowiest month in Chesterfield?
February is the month with the most snowfall in Chesterfield. Snow falls for 6.3 days and accumulates 2.28" (58mm) of snow.
When is Daylight Saving Time (DST) in Chesterfield?
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.
When it does not snow in Chesterfield?
April through October are months without snowfall.
What is the rainiest month in Chesterfield?
The month with the most rainfall is June, when the rain falls for 15.4 days and typically aggregates up to 3.07" (78mm) of precipitation.
When are the longest days in Chesterfield?
The month with the longest days is June, with an average of 14h and 54min of daylight.
What month has the most sunshine in Chesterfield?
With an average of 10.3h of sunshine, June has the most sunshine of the year in Chesterfield.
When is the highest UV index in Chesterfield?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What part of the year is the hottest in Chesterfield?
July, having an average high-temperature of 83.8°F (28.8°C) and an average low-temperature of 66.9°F (19.4°C), is the warmest month in Chesterfield.
What is the most humid month in Chesterfield?
With an average relative humidity of 82%, July is the most humid month in Chesterfield, Illinois.
What is the least humid month in Chesterfield?
With an average relative humidity of 71%, October is the least humid month in Chesterfield, Illinois.
What is the month with the shortest days in Chesterfield?
December has the shortest days of the year, with an average of 9h and 30min of daylight.
Average temperature
Chesterfield, IL
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.9°F).
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure
Chesterfield, IL
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Chesterfield, IL
- Average wind speed in January:
10.1mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.8mph - Average wind speed in April:
9.8mph - Average wind speed in May:
8mph - Average wind speed in June:
7mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
6mph - Average wind speed in September:
6.6mph - Average wind speed in October:
8.6mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.4mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity
Chesterfield, IL
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Chesterfield, IL
- Average rainfall in January:
1.22" - Average rainfall in February:
1.22" - Average rainfall in March:
1.77" - Average rainfall in April:
2.64" - Average rainfall in May:
2.76" - Average rainfall in June:
3.07"
- Average rainfall in July:
2.17" - Average rainfall in August:
2.28" - Average rainfall in September:
1.73" - Average rainfall in October:
1.73" - Average rainfall in November:
1.42" - Average rainfall in December:
1.3"
The wettest month (with the highest rainfall) is June (3.07").
The driest months (with the least rainfall) are January and February (1.22").
Average rainfall days
Chesterfield, IL
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
6.4 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
14.6 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
15.4 days
- Average rainfall days in July:
15.3 days - Average rainfall days in August:
12.3 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
9.6 days - Average rainfall days in November:
8.6 days - Average rainfall days in December:
8.1 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (6.3 days).
Average snowfall
Chesterfield, IL
The month with the highest snowfall is February (2.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Chesterfield, IL
- Average snowfall days in January:
6.2 days - Average snowfall days in February:
6.3 days - Average snowfall days in March:
2.3 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:
1.3 days - Average snowfall days in December:
4.7 days
The month with the highest number of snowfall days is February (6.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Chesterfield, 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 2min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- 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 3min
The month with the longest days is June (Average daylight: 14h and 54min).
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 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
Chesterfield, IL
- Average sunshine days in January:
19.1 days - Average sunshine days in February:
16.4 days - Average sunshine days in March:
15.8 days - Average sunshine days in April:
14 days - Average sunshine days in May:
11.1 days - Average sunshine days in June:
12.1 days
- Average sunshine days in July:
13 days - Average sunshine days in August:
15 days - Average sunshine days in September:
16 days - Average sunshine days in October:
19.8 days - Average sunshine days in November:
19.4 days - Average sunshine days in December:
19.2 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is May (11.1 days).
Average UV index
Chesterfield, 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
Chesterfield, IL
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility
Chesterfield, 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).
Chesterfield, Illinois, USA
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