Climate and monthly weather forecastDe Witt, IL
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in De Witt, Illinois, with an average temperature fluctuating between 19.9°F (-6.7°C) and 31.5°F (-0.3°C). In De Witt, January is the coldest month, with temperatures averaging a high of 31.5°F (-0.3°C) and a low of 19.9°F (-6.7°C). Weather in January »Weather in February
The last month of the winter, February, is a wintry month in De Witt, Illinois, with temperature in the range of an average low of 23.4°F (-4.8°C) and an average high of 36.3°F (2.4°C). The onset of February marks an average high-temperature of a wintry 36.3°F (2.4°C), hardly differing from January's 31.5°F (-0.3°C). Weather in February »Weather in March
March, the first month of the spring in De Witt, is a chilly month, with temperature in the range of an average low of 34.3°F (1.3°C) and an average high of 49.3°F (9.6°C). The start of March brings a shift in the average high-temperature, increasing from February's cold 36.3°F (2.4°C) to a frosty 49.3°F (9.6°C). Weather in March »Weather in April
April is a refreshing spring month in De Witt, Illinois, with an average temperature fluctuating between 45.5°F (7.5°C) and 61.3°F (16.3°C). The start of April signals an increase in the average high-temperature, moving from a frosty 49.3°F (9.6°C) in March to a comfortable 61.3°F (16.3°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in De Witt, Illinois, with an average temperature ranging between min 55.8°F (13.2°C) and max 72.1°F (22.3°C). As De Witt enters May, the average high-temperature increases from the a refreshing 61.3°F (16.3°C) of April to an agreeable 72.1°F (22.3°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in De Witt, Illinois, with temperature in the range of an average low of 63.9°F (17.7°C) and an average high of 79.9°F (26.6°C). In De Witt, the average high-temperature in June slightly increases from an agreeable 72.1°F (22.3°C) in May to a warm 79.9°F (26.6°C). Weather in June »Weather in July
July, like June, in De Witt, Illinois, is a moderately hot summer month, with an average temperature varying between 81°F (27.2°C) and 64.9°F (18.3°C). In De Witt, Illinois, July is the month with the highest recorded average temperatures, measuring a high of 81°F (27.2°C) and a low of 64.9°F (18.3°C). The heat index for July is estimated at a hot 87.8°F (31°C). Weather in July »Weather in August
August, the last month of the summer in De Witt, is another warm month, with an average temperature ranging between min 63.3°F (17.4°C) and max 80.2°F (26.8°C). August is marked by an average high-temperature of a still moderately hot 80.2°F (26.8°C), almost identical to the preceding month. Weather in August »Weather in September
September, the first month of the autumn in De Witt, is still a warm month, with an average temperature fluctuating between 58.1°F (14.5°C) and 75.9°F (24.4°C). The transition into September marks the average high-temperature at a still warm 75.9°F (24.4°C), differing minimally from August's 80.2°F (26.8°C). Weather in September »Weather in October
October, the same as September, is another enjoyable autumn month in De Witt, Illinois, with an average temperature varying between 63.3°F (17.4°C) and 46.9°F (8.3°C). The average high-temperature decreases in October, shifting from a moderately hot 75.9°F (24.4°C) in September to an enjoyable 63.3°F (17.4°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in De Witt, Illinois, with an average temperature varying between 48.9°F (9.4°C) and 35.4°F (1.9°C). As October transitions into November, De Witt sees a drop in the average high-temperature, transitioning from a refreshing 63.3°F (17.4°C) to a frosty 48.9°F (9.4°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in De Witt, Illinois, with an average temperature fluctuating between 37.6°F (3.1°C) and 27.3°F (-2.6°C). With December's arrival, De Witt's weather changes as the average high-temperature falls from a frosty 48.9°F (9.4°C) in November to a cold 37.6°F (3.1°C). Weather in December »Updated: Feb 12, 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
In De Witt, January records the average lowest temperatures, peaking at 31.5°F (-0.3°C) and reaching a low of 19.9°F (-6.7°C).
Throughout the year, there are 138.7 rainfall days, and 20.91" (531mm) of precipitation is accumulated.
Months with snowfall in De Witt are January through April, November and December.
January is the month with the most snowfall in De Witt. Snow falls for 9.6 days and accumulates 2.76" (70mm) of snow.
Throughout the year, in De Witt, Illinois, there are 27.3 snowfall days, and 9.09" (231mm) of snow is accumulated.
January has the least sunshine of the year in De Witt, with an average of 4h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in De Witt, Illinois.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in De Witt, 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.
May is the month with the most rainfall in De Witt, Illinois. Rain falls for 17.3 days and accumulates 2.83" (72mm) of precipitation.
May through October are months without snowfall.
The month with the longest days in De Witt is June, with an average of 15h and 0min of daylight.
With an average of 10.1h of sunshine, June has the most sunshine of the year.
June and July, with an average maximum UV index of 6, are months with the highest UV index in De Witt.
In De Witt, the average temperatures in July are the highest, with a peak at 81°F (27.2°C) and a low of 64.9°F (18.3°C).
The most humid month in De Witt, Illinois, is July, with an average relative humidity of 85%.
With an average relative humidity of 70%, October is the least humid month.
The month with the least rainfall is December, when the rain falls for 7.6 days and typically collects 1.1" (28mm) of precipitation.
December has the shortest days of the year, with an average of 9h and 24min of daylight.
Average temperature
De Witt, IL
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.5°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure
De Witt, 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
De Witt, IL
- Average wind speed in January:
10.9mph - Average wind speed in February:
10.8mph - 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:
7.8mph
- 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:
10.4mph - Average wind speed in December:
10.3mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
De Witt, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall
De Witt, IL
- Average rainfall in January:
1.26" - Average rainfall in February:
1.14" - Average rainfall in March:
1.69" - Average rainfall in April:
2.28" - Average rainfall in May:
2.83" - Average rainfall in June:
2.44"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days
De Witt, IL
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
6.1 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
15.4 days
- Average rainfall days in July:
16.5 days - Average rainfall days in August:
13.7 days - Average rainfall days in September:
10.7 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
7.6 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (6.1 days).
Average snowfall
De Witt, IL
The month with the highest snowfall is January (2.76").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
De Witt, IL
- Average snowfall days in January:
9.6 days - Average snowfall days in February:
6.7 days - Average snowfall days in March:
2.9 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:
1.9 days - Average snowfall days in December:
5.5 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
De Witt, IL
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
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:
4h and 0min - Average sunshine in February:
4h and 12min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 0min - Average sunshine in May:
9h and 6min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
9h and 54min - Average sunshine in August:
9h and 54min - Average sunshine in September:
9h and 6min - Average sunshine in October:
6h and 6min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 24min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
De Witt, IL
- Average sunshine days in January:
16.8 days - Average sunshine days in February:
16.8 days - Average sunshine days in March:
15.9 days - Average sunshine days in April:
14 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
11.3 days
- Average sunshine days in July:
11 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
16.6 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
19.2 days - Average sunshine days in December:
18.3 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (10.4 days).
Average UV index
De Witt, IL
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
De Witt, IL
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility
De Witt, 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).
