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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, in Deerfield, Illinois, is a freezing cold winter month, with an average temperature varying between 18.9°F (-7.3°C) and 28.6°F (-1.9°C). January, with its high-temperature average of 28.6°F (-1.9°C) and a low-temperature average of 18.9°F (-7.3°C), is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Deerfield, Illinois, with an average temperature fluctuating between 31.3°F (-0.4°C) and 21.6°F (-5.8°C). As February unfolds, the average high-temperature reaches a still subzero cold 31.3°F (-0.4°C), hinting at a slight fluctuation from the previous month. Weather in February »
Weather in March
March, the first month of the spring in Deerfield, is an icy month, with an average temperature varying between 31.5°F (-0.3°C) and 41.5°F (5.3°C). Deerfield in March experiences an increase in the average high-temperature, moving from February's freezing cold 31.3°F (-0.4°C) to a cold 41.5°F (5.3°C). Weather in March »
Weather in April
April in Deerfield, Illinois, is a cool spring month, with an average temperature varying between 39.7°F (4.3°C) and 50.9°F (10.5°C). April brings an increase in the average high-temperature, progressing from an icy 41.5°F (5.3°C) in March to a fresh 50.9°F (10.5°C). Weather in April »
Weather in May
May, the last month of the spring in Deerfield, is an enjoyable month, with an average temperature ranging between max 61.2°F (16.2°C) and min 49.6°F (9.8°C). Deerfield's weather in May shows a rise in the average high-temperature, moving up from April's cool 50.9°F (10.5°C) to an enjoyable 61.2°F (16.2°C). Weather in May »
Weather in June
The first month of the summer, June, is an agreeable month in Deerfield, Illinois, with an average temperature varying between 71.1°F (21.7°C) and 59.4°F (15.2°C). As May transitions into June, Deerfield sees a rise in the average high-temperature, moving from a refreshing 61.2°F (16.2°C) to a pleasant 71.1°F (21.7°C). Weather in June »
Weather in July
July is a warm summer month in Deerfield, Illinois, with an average temperature varying between 66.7°F (19.3°C) and 77.7°F (25.4°C). Deerfield witnesses the warmest weather in July, with temperatures averaging a high of 77.7°F (25.4°C) and a low of 66.7°F (19.3°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Deerfield, Illinois, with an average temperature fluctuating between 66.7°F (19.3°C) and 77.5°F (25.3°C). August commences with an average high-temperature of a still moderately hot 77.5°F (25.3°C), showing little deviation from July's 77.7°F (25.4°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Deerfield, Illinois, with an average temperature varying between 71.2°F (21.8°C) and 60.1°F (15.6°C). Deerfield's weather subtly changes with the onset of September, barely falling from a warm 77.5°F (25.3°C) in August to an agreeable 71.2°F (21.8°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Deerfield, Illinois, with an average temperature fluctuating between 47.7°F (8.7°C) and 58.6°F (14.8°C). Welcoming October, Deerfield observes a shift in the average high-temperature, falling from September's pleasant 71.2°F (21.8°C) to a refreshing 58.6°F (14.8°C). Weather in October »
Weather in November
November, the last month of the autumn in Deerfield, is also a frosty month, with an average temperature ranging between max 45.5°F (7.5°C) and min 35.1°F (1.7°C). Deerfield's progression into November includes a drop in the average high-temperature, from a moderate 58.6°F (14.8°C) in October to a chilly 45.5°F (7.5°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Deerfield, Illinois, with temperature in the range of an average low of 26.2°F (-3.2°C) and an average high of 34.5°F (1.4°C). In the transition to December, Deerfield observes a drop in the average high-temperature, moving from a chilly 45.5°F (7.5°C) in November to an icy 34.5°F (1.4°C). Weather in December »
Updated: Jun 19, 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 part of the year is the coldest in Deerfield?
Deerfield's coldest month, January, generally records average temperatures ranging from a high of 28.6°F (-1.9°C) to a low of 18.9°F (-7.3°C).
What is the most humid month?
January and February, with an average relative humidity of 82%, are most humid months.
How much does it rain?
In Deerfield, during the entire year, the rain falls for 154.1 days and collects up to 30.24" (768mm) of precipitation.
When does it snow in Deerfield?
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 11.9 days and accumulates 4.13" (105mm) of snow.
How many days does it snow?
In Deerfield, during the entire year, snow falls for 42.9 days and aggregates up to 13.82" (351mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year in Deerfield, with an average of 3.8h of sunshine.
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 wettest month?
The months with the most rainfall in Deerfield are May and June, with an average 3.82" (97mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
When are the longest days?
With an average of 15h and 12min of daylight, June has the longest days of the year.
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 part of the year is the hottest?
July proves to be the warmest month, recording an average peak temperature of 77.7°F (25.4°C) and a minimum temperature of 66.7°F (19.3°C).
What month has the most sunshine?
The month with the most sunshine is August, with an average of 10.7h of sunshine.
What is the least humid month?
The least humid month is October, with an average relative humidity of 73%.
What is the driest month?
December is the month with the least rainfall in Deerfield. Rain falls for 8.6 days and accumulates 1.3" (33mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 12min of daylight.
What is the month with the lowest UV index?
With an average maximum UV index of 1, December is the month with the lowest UV index.
Average temperature
Deerfield, IL
The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (28.6°F).
The months with the highest average low temperature are July and August (66.7°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Deerfield, IL
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"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"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Deerfield, IL
- Average wind speed in January:
11.9mph - Average wind speed in February:
11.6mph - Average wind speed in March:
10.7mph - Average wind speed in April:
10.8mph - Average wind speed in May:
9.1mph - Average wind speed in June:
8.1mph
- Average wind speed in July:
7.5mph - Average wind speed in August:
7.4mph - Average wind speed in September:
8.9mph - Average wind speed in October:
10.7mph - Average wind speed in November:
11.5mph - Average wind speed in December:
11.2mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).
Average humidity
Deerfield, IL
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Deerfield, IL
- Average rainfall in January:
1.54" - Average rainfall in February:
1.54" - Average rainfall in March:
1.77" - Average rainfall in April:
3.43" - Average rainfall in May:
3.82" - Average rainfall in June:
3.82"
The wettest months (with the highest rainfall) are May and June (3.82").
The driest month (with the least rainfall) is December (1.3").
Average rainfall days
Deerfield, IL
- Average rainfall days in January:
6.2 days - Average rainfall days in February:
5.9 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
16.1 days - Average rainfall days in May:
17.7 days - Average rainfall days in June:
16.6 days
- Average rainfall days in July:
17.4 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
13.6 days - Average rainfall days in October:
14.7 days - Average rainfall days in November:
10.2 days - Average rainfall days in December:
8.6 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (5.9 days).
Average snowfall
Deerfield, IL
The month with the highest snowfall is January (4.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Deerfield, IL
- Average snowfall days in January:
11.9 days - Average snowfall days in February:
9.5 days - Average snowfall days in March:
5.8 days - Average snowfall days in April:
2.4 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:
0.5 days - Average snowfall days in November:
3.7 days - Average snowfall days in December:
9.1 days
The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Deerfield, IL
- Average daylight in January:
9h and 3min - 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 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
3h and 5min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 4min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Deerfield, IL
- Average sunshine days in January:
12.8 days - Average sunshine days in February:
12.3 days - Average sunshine days in March:
14 days - Average sunshine days in April:
10.8 days - Average sunshine days in May:
11.2 days - Average sunshine days in June:
11.2 days
- Average sunshine days in July:
11.5 days - Average sunshine days in August:
13.1 days - Average sunshine days in September:
13.3 days - Average sunshine days in October:
13.6 days - Average sunshine days in November:
14.7 days - Average sunshine days in December:
15.3 days
The month with the most sunshine days is December (15.3 days).
The month with the least sunshine days is April (10.8 days).
Average UV index
Deerfield, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Deerfield, IL
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility
Deerfield, 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).
Deerfield, Illinois, USA
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