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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, like December, is another subzero cold winter month in Delavan, Illinois, with temperature in the range of an average high of 31.5°F (-0.3°C) and an average low of 19.8°F (-6.8°C). January, noted for its average high-temperature of 31.5°F (-0.3°C) and an average low-temperature of 19.8°F (-6.8°C), is considered the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is a cold month in Delavan, Illinois, with an average temperature varying between 36.3°F (2.4°C) and 23.4°F (-4.8°C). During February, the average high-temperature is an icy 36.3°F (2.4°C), maintaining a close resemblance to that of the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Delavan, Illinois, with an average temperature ranging between max 49.6°F (9.8°C) and min 34.5°F (1.4°C). In Delavan, stepping into March brings a temperature increase, moving up from February's wintry 36.3°F (2.4°C) to a chilly 49.6°F (9.8°C). Weather in March »
Weather in April
April in Delavan, Illinois, is an enjoyable spring month, with an average temperature varying between 61.5°F (16.4°C) and 44.6°F (7°C). April witnesses an increase in the average high-temperature, moving from a frosty 49.6°F (9.8°C) in March to a refreshing 61.5°F (16.4°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Delavan, Illinois, with an average temperature ranging between min 55.8°F (13.2°C) and max 72.1°F (22.3°C). The beginning of May marks a shift in the average high-temperature, moving from April's comfortable 61.5°F (16.4°C) to an agreeable 72.1°F (22.3°C). Weather in May »
Weather in June
June, the first month of the summer in Delavan, is a moderately hot month, with temperature in the range of an average low of 63.9°F (17.7°C) and an average high of 80.6°F (27°C). June comes with a subtle rise, with the average high-temperature adjusting from a pleasant 72.1°F (22.3°C) in May to a moderately hot 80.6°F (27°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Delavan, Illinois, with temperature in the range of an average high of 82°F (27.8°C) and an average low of 65.3°F (18.5°C). During the warmest month, July, temperatures average a high of 82°F (27.8°C) and a low of 65.3°F (18.5°C). In July, the average heat index is evaluated at a hot 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Delavan, is also a moderately hot month, with temperature in the range of an average low of 63.5°F (17.5°C) and an average high of 81.1°F (27.3°C). In August, Delavan notes an average high-temperature of a still warm 81.1°F (27.3°C), hardly different from the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Delavan, is also a moderately hot month, with an average temperature varying between 57.9°F (14.4°C) and 76.5°F (24.7°C). September welcomes an average high-temperature of a still warm 76.5°F (24.7°C), not much different from the preceding month. Weather in September »
Weather in October
October, like September, in Delavan, Illinois, is another refreshing autumn month, with temperature in the range of an average low of 46.9°F (8.3°C) and an average high of 63.1°F (17.3°C). October is characterized by a reduction in the average high-temperature, from a warm 76.5°F (24.7°C) in September to an enjoyable 63.1°F (17.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Delavan, is also a frosty month, with temperature in the range of an average low of 35.2°F (1.8°C) and an average high of 48.9°F (9.4°C). The arrival of November corresponds with a temperature reduction, down from October's enjoyable 63.1°F (17.3°C) to a frosty 48.9°F (9.4°C). Weather in November »
Weather in December
December, the first month of the winter in Delavan, is also a wintry month, with temperature in the range of an average low of 26.4°F (-3.1°C) and an average high of 36.9°F (2.7°C). The shift from November to December involves a decrease in the average high-temperature, dropping from a frosty 48.9°F (9.4°C) to an icy 36.9°F (2.7°C). Weather in December »
Updated: Jul 30, 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?
January, marked by an average high-temperature of 31.5°F (-0.3°C) and a low-temperature of 19.8°F (-6.8°C), is the coldest month.
How much does it rain?
Throughout the year, there are 131.4 rainfall days, and 20.08" (510mm) of precipitation is accumulated.
When does it snow?
January through April, November and December are months with snowfall.
What is the snowiest month?
January is the month with the most snowfall. Snow falls for 8.4 days and accumulates 2.87" (73mm) of snow.
How much does it snow?
Throughout the year, there are 25.8 snowfall days, and 8.66" (220mm) of snow is accumulated.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4h of sunshine.
What are the months with the lowest UV index in Delavan?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
What is the driest month?
The month with the least rainfall is February, when the rain falls for 5.1 days and typically collects 1.02" (26mm) of precipitation.
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 in Delavan?
The month with the most rainfall is May, when the rain falls for 17.7 days and typically aggregates up to 2.83" (72mm) of precipitation.
When it does not snow?
May through October are months without snowfall in Delavan.
When are the longest days?
With an average of 15h and 0min of daylight, June has the longest days of the year.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 10.2h of sunshine.
What are the months with 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?
July is the warmest month of the year, registering average temperatures as high as 82°F (27.8°C) and as low as 65.3°F (18.5°C).
What is the most humid month?
The most humid month is July, with an average relative humidity of 84%.
What is the least humid month?
With an average relative humidity of 71%, October is the least humid month.
What is the month with the shortest days?
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
Delavan, IL
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (31.5°F).
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure
Delavan, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"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:
30.11"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 (29.91"Hg).
Average wind speed
Delavan, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.6mph - Average wind speed in May:
8.8mph - 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:
9.3mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Delavan, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Delavan, IL
- Average rainfall in January:
1.06" - Average rainfall in February:
1.02" - Average rainfall in March:
1.57" - Average rainfall in April:
2.28" - Average rainfall in May:
2.83" - Average rainfall in June:
2.28"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.61" - Average rainfall in September:
1.57" - Average rainfall in October:
1.61" - Average rainfall in November:
1.26" - Average rainfall in December:
1.06"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days
Delavan, IL
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
5.1 days - Average rainfall days in March:
11.8 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
17.7 days - Average rainfall days in June:
15.7 days
- Average rainfall days in July:
15.5 days - Average rainfall days in August:
12.4 days - Average rainfall days in September:
10.3 days - Average rainfall days in October:
9.8 days - Average rainfall days in November:
7.9 days - Average rainfall days in December:
6.6 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (5.1 days).
Average snowfall
Delavan, IL
The month with the highest snowfall is January (2.87").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Delavan, IL
- Average snowfall days in January:
8.4 days - Average snowfall days in February:
6.4 days - Average snowfall days in March:
3.2 days - Average snowfall days in April:
0.5 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:
0.2 days - Average snowfall days in November:
1.7 days - Average snowfall days in December:
5.4 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Delavan, 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 18min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 1min - 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:
5h and 5min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Delavan, IL
- Average sunshine days in January:
18.3 days - Average sunshine days in February:
17.6 days - Average sunshine days in March:
16.1 days - Average sunshine days in April:
14.8 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
12 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
18.8 days - Average sunshine days in October:
19.4 days - Average sunshine days in November:
20 days - Average sunshine days in December:
19.7 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (11.8 days).
Average UV index
Delavan, 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
Delavan, 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
Delavan, 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).
Delavan, Illinois, USA
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