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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, in New Haven, Illinois, is an icy winter month, with an average temperature varying between 26.1°F (-3.3°C) and 38.3°F (3.5°C). New Haven's coldest weather arrives in January, when temperatures average a high of 38.3°F (3.5°C) and a low of 26.1°F (-3.3°C). Weather in January »
Weather in February
The last month of the winter, February, is a frosty month in New Haven, Illinois, with an average temperature fluctuating between 43.7°F (6.5°C) and 30°F (-1.1°C). February's onset brings a subtle temperature rise, moving from an icy 38.3°F (3.5°C) in January to a frosty 43.7°F (6.5°C). Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in New Haven, Illinois, with an average temperature varying between 39°F (3.9°C) and 54.5°F (12.5°C). The start of March signals an increase in the average high-temperature, moving from a frosty 43.7°F (6.5°C) in February to a cool 54.5°F (12.5°C). Weather in March »
Weather in April
April in New Haven, Illinois, is a refreshing spring month, with an average temperature fluctuating between 48.7°F (9.3°C) and 66°F (18.9°C). As New Haven, Illinois, transitions into April, the average high-temperature is observed to rise from a cool 54.5°F (12.5°C) in March to a comfortable 66°F (18.9°C). Weather in April »
Weather in May
May, the last month of the spring in New Haven, is a warm month, with an average temperature ranging between min 58.3°F (14.6°C) and max 75.2°F (24°C). New Haven's transition into May is marked by a rise in the average high-temperature, advancing from an enjoyable 66°F (18.9°C) in April to a warm 75.2°F (24°C). Weather in May »
Weather in June
The first month of the summer, June, is still a warm month in New Haven, Illinois, with an average temperature varying between 66.6°F (19.2°C) and 83.8°F (28.8°C). The shift into June is marked by a modest rise in the average high-temperature, moving from May's warm 75.2°F (24°C) to a still moderately hot 83.8°F (28.8°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in New Haven, Illinois, with an average temperature ranging between max 85.6°F (29.8°C) and min 68.2°F (20.1°C). New Haven's July weather reaches an average high of 85.6°F (29.8°C) and an average low of 68.2°F (20.1°C), making it the warmest month. July's mean heat index is evaluated at a fiery hot 98.6°F (37°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in New Haven, Illinois, with temperature in the range of an average low of 65.8°F (18.8°C) and an average high of 84.4°F (29.1°C). New Haven's August showcases an average high-temperature of a still warm 84.4°F (29.1°C), hardly distinct from July's 85.6°F (29.8°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in New Haven, Illinois, with an average temperature varying between 60.8°F (16°C) and 79.5°F (26.4°C). The transition into September shows a subtle variation to a still warm 79.5°F (26.4°C) from August's 84.4°F (29.1°C) in the average high-temperature. Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in New Haven, Illinois, with temperature in the range of an average low of 49.6°F (9.8°C) and an average high of 67.1°F (19.5°C). October brings a minor decrease, with the average high-temperature reducing from a moderately hot 79.5°F (26.4°C) in September to a refreshing 67.1°F (19.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in New Haven, Illinois, with an average temperature varying between 53.6°F (12°C) and 38.5°F (3.6°C). In November, the meteorological conditions alter, with the average high-temperature shifting from a comfortable 67.1°F (19.5°C) in October to a fresh 53.6°F (12°C). Weather in November »
Weather in December
December, the first month of the winter in New Haven, is also a frosty month, with an average temperature fluctuating between 43.5°F (6.4°C) and 32.2°F (0.1°C). The arrival of December indicates a decrease in the average high-temperature, moving from a cool 53.6°F (12°C) in November to a frosty 43.5°F (6.4°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
What is the coldest time of year in New Haven?
January, noted for its average high-temperature of 38.3°F (3.5°C) and an average low-temperature of 26.1°F (-3.3°C), is considered the coldest month.
How much does it rain in New Haven?
Throughout the year, in New Haven, there are 100.2 rainfall days, and 8.7" (221mm) of precipitation is accumulated.
When does it snow in New Haven?
January through March, November and December are months with snowfall.
When does it snow the most in New Haven?
The months with the most snowfall are January and February, with an average 0.28" (7mm) of accumulated snow.
How much does it snow in New Haven?
Throughout the year, there are 10.1 snowfall days, and 0.91" (23mm) of snow is accumulated.
What is the month with the least sunshine in New Haven?
January has the least sunshine of the year in New Haven, Illinois, with an average of 4.4h of sunshine.
When is the lowest UV index in New Haven?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in New Haven.
When is Daylight Saving Time (DST) in New Haven?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in New Haven, Illinois, 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 wettest month in New Haven?
April is the month with the most rainfall. Rain falls for 11.3 days and accumulates 1.06" (27mm) of precipitation.
When it does not snow in New Haven?
In New Haven, snow does not fall in April through October.
What are the most humid months in New Haven?
The months with the highest humidity are May and July, with an average relative humidity of 79%.
When is the highest UV index in New Haven?
May through August, with an average maximum UV index of 6, are months with the highest UV index in New Haven, Illinois.
When are the longest days in New Haven?
June has the longest days of the year, with an average of 14h and 48min of daylight.
What month has the most sunshine in New Haven?
June has the most sunshine of the year, with an average of 10.6h of sunshine.
What is the hottest time of year in New Haven?
July is the warmest month of the year in New Haven, registering average temperatures as high as 85.6°F (29.8°C) and as low as 68.2°F (20.1°C).
What is the driest month in New Haven?
September is the month with the least rainfall in New Haven, Illinois. Rain falls for 7.3 days and accumulates 0.28" (7mm) of precipitation.
What is the least humid month in New Haven?
The least humid month is October, with an average relative humidity of 69%.
What is the month with the shortest days in New Haven?
The month with the shortest days in New Haven is December, with an average of 9h and 36min of daylight.
Average temperature
New Haven, IL
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (38.3°F).
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure
New Haven, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
New Haven, IL
- Average wind speed in January:
10mph - Average wind speed in February:
10.1mph - Average wind speed in March:
9.9mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7mph
- Average wind speed in July:
6mph - Average wind speed in August:
6mph - Average wind speed in September:
6.7mph - Average wind speed in October:
8.5mph - Average wind speed in November:
9.1mph - Average wind speed in December:
9.3mph
The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity
New Haven, IL
The months with the highest relative humidity are May and July (79%).
The month with the lowest relative humidity is October (69%).
Average rainfall
New Haven, IL
- Average rainfall in January:
0.67" - Average rainfall in February:
0.63" - Average rainfall in March:
0.75" - Average rainfall in April:
1.06" - Average rainfall in May:
0.98" - Average rainfall in June:
0.94"
- Average rainfall in July:
0.79" - Average rainfall in August:
0.79" - Average rainfall in September:
0.28" - Average rainfall in October:
0.71" - Average rainfall in November:
0.51" - Average rainfall in December:
0.59"
The wettest month (with the highest rainfall) is April (1.06").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days
New Haven, IL
- Average rainfall days in January:
5 days - Average rainfall days in February:
6.2 days - Average rainfall days in March:
9.1 days - Average rainfall days in April:
11.3 days - Average rainfall days in May:
11.9 days - Average rainfall days in June:
10.4 days
- Average rainfall days in July:
11.3 days - Average rainfall days in August:
10.2 days - Average rainfall days in September:
7.3 days - Average rainfall days in October:
6 days - Average rainfall days in November:
5.3 days - Average rainfall days in December:
6.2 days
The month with the highest number of rainy days is May (11.9 days).
The month with the least rainy days is January (5 days).
Average snowfall
New Haven, IL
The months with the highest snowfall are January and February (0.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
New Haven, IL
- Average snowfall days in January:
3.3 days - Average snowfall days in February:
2.8 days - Average snowfall days in March:
1.3 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 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
1.9 days
The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
New Haven, 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 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 3min - 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 1min - Average daylight in December:
9h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 4min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 4min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 3min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 5min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days
New Haven, IL
- Average sunshine days in January:
23.3 days - Average sunshine days in February:
19.8 days - Average sunshine days in March:
19.9 days - Average sunshine days in April:
17.7 days - Average sunshine days in May:
15.8 days - Average sunshine days in June:
16.3 days
- Average sunshine days in July:
16.9 days - Average sunshine days in August:
17.8 days - Average sunshine days in September:
20.4 days - Average sunshine days in October:
23.4 days - Average sunshine days in November:
22.3 days - Average sunshine days in December:
22.5 days
The month with the most sunshine days is October (23.4 days).
The month with the least sunshine days is May (15.8 days).
Average UV index
New Haven, IL
The months with the highest UV index are May, 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
New Haven, IL
The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are June and August (Cloud cover 27).
Average visibility
New Haven, 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).
New Haven, Illinois, USA
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