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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 a freezing cold winter month in Northbrook, Illinois, with an average temperature fluctuating between 18.9°F (-7.3°C) and 28.8°F (-1.8°C). With average high temperatures of 28.8°F (-1.8°C) and lows of 18.9°F (-7.3°C), January is the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Northbrook, is also a subzero cold month, with temperature in the range of an average low of 21.6°F (-5.8°C) and an average high of 31.8°F (-0.1°C). The commencement of February brings an average high-temperature of a still freezing cold 31.8°F (-0.1°C), marking an inconsequential divergence from January. Weather in February »
Weather in March
March, the first month of the spring in Northbrook, is a cold month, with an average temperature ranging between max 42.3°F (5.7°C) and min 31.5°F (-0.3°C). Northbrook sees a rise in temperature during March, with average high-temperatures transitioning from a freezing cold 31.8°F (-0.1°C) in February to a wintry 42.3°F (5.7°C). Weather in March »
Weather in April
April in Northbrook, Illinois, is a fresh spring month, with an average temperature ranging between min 39.7°F (4.3°C) and max 52°F (11.1°C). Northbrook sees a rise in temperature during April, with average high-temperatures transitioning from a wintry 42.3°F (5.7°C) in March to a cool 52°F (11.1°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Northbrook, Illinois, with an average temperature fluctuating between 50.4°F (10.2°C) and 62.8°F (17.1°C). The beginning of May marks a shift in the average high-temperature, moving from April's fresh 52°F (11.1°C) to an enjoyable 62.8°F (17.1°C). Weather in May »
Weather in June
June, the first month of the summer in Northbrook, is an agreeable month, with an average temperature ranging between max 72.5°F (22.5°C) and min 60.1°F (15.6°C). Northbrook's weather in June presents a rise in the average high-temperature, moving from a refreshing 62.8°F (17.1°C) in May to an agreeable 72.5°F (22.5°C). Weather in June »
Weather in July
July is a warm summer month in Northbrook, Illinois, with an average temperature fluctuating between 79.2°F (26.2°C) and 67.1°F (19.5°C). Northbrook's July weather reaches an average high of 79.2°F (26.2°C) and an average low of 67.1°F (19.5°C), making it the warmest month. Weather in July »
Weather in August
August, the last month of the summer in Northbrook, is another warm month, with an average temperature varying between 66.9°F (19.4°C) and 78.1°F (25.6°C). The commencement of August records an average high-temperature of a still warm 78.1°F (25.6°C), barely varying from July's 79.2°F (26.2°C). Weather in August »
Weather in September
September, the first month of the autumn in Northbrook, is still a pleasant month, with an average temperature varying between 60.3°F (15.7°C) and 71.6°F (22°C). In Northbrook, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's moderately hot 78.1°F (25.6°C) to a pleasant 71.6°F (22°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Northbrook, Illinois, with an average temperature fluctuating between 59.5°F (15.3°C) and 47.7°F (8.7°C). The commencement of October indicates a shift in the average high-temperature, receding from September's agreeable 71.6°F (22°C) to a mild 59.5°F (15.3°C). Weather in October »
Weather in November
November, the last month of the autumn in Northbrook, is another chilly month, with an average temperature fluctuating between 35.1°F (1.7°C) and 45.5°F (7.5°C). As October transitions into November, Northbrook sees a drop in the average high-temperature, transitioning from a moderate 59.5°F (15.3°C) to a chilly 45.5°F (7.5°C). Weather in November »
Weather in December
December, the first month of the winter in Northbrook, is also a wintry month, with an average temperature ranging between min 26.1°F (-3.3°C) and max 34.9°F (1.6°C). As Northbrook enters December, the average high-temperature decreases from the a frosty 45.5°F (7.5°C) of November to a wintry 34.9°F (1.6°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest time of year in Northbrook?
The lowest temperatures in Northbrook, Illinois, are recorded in January, with averages reaching a high of 28.8°F (-1.8°C) and a low of 18.9°F (-7.3°C).
What is the most humid month in Northbrook?
With an average relative humidity of 82%, January is the most humid month in Northbrook, Illinois.
How much does it rain in Northbrook?
In Northbrook, Illinois, during the entire year, the rain falls for 164.7 days and collects up to 35.28" (896mm) of precipitation.
When does it snow in Northbrook?
January through May, October through December are months with snowfall in Northbrook, Illinois.
When does it snow the most in Northbrook?
The month with the most snowfall is January, when snow falls for 13.1 days and typically aggregates up to 4.84" (123mm) of snow.
How much does it snow in Northbrook?
Throughout the year, there are 47.6 snowfall days, and 17.8" (452mm) of snow is accumulated.
What is the month with the least sunshine in Northbrook?
The month with the least sunshine in Northbrook is January, with an average of 3.7h of sunshine.
When is Daylight Saving Time (DST) in Northbrook?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Northbrook, 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 Northbrook?
The wettest months in Northbrook, Illinois, are May and June, with an average 4.57" (116mm) of rainfall.
When it does not snow in Northbrook?
June through September are months without snowfall.
When are the longest days in Northbrook?
The month with the longest days is June, with an average of 15h and 12min of daylight.
What is the month with the highest UV index in Northbrook?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What is the hottest time of year in Northbrook?
Northbrook experiences its highest temperatures in July, with an average peak of 79.2°F (26.2°C) and a low of 67.1°F (19.5°C).
What is the month with the most sunshine in Northbrook?
The months with the most sunshine in Northbrook, Illinois, are July and August, with an average of 10.4h of sunshine.
What is the least humid month in Northbrook?
October is the least humid month in Northbrook, with an average relative humidity of 73%.
What is the driest month in Northbrook?
The month with the least rainfall is December, when the rain falls for 9.1 days and typically collects 1.65" (42mm) of precipitation.
What is the month with the shortest days in Northbrook?
With an average of 9h and 12min of daylight, December has the shortest days of the year in Northbrook, Illinois.
What is the month with the lowest UV index in Northbrook?
With an average maximum UV index of 1, December is the month with the lowest UV index in Northbrook.
Average temperature
Northbrook, IL
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Northbrook, IL
- Average pressure in January:
30.11"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 (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Northbrook, IL
- Average wind speed in January:
11.5mph - Average wind speed in February:
11.1mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.6mph - Average wind speed in May:
8.9mph - Average wind speed in June:
8mph
- Average wind speed in July:
7.3mph - Average wind speed in August:
7.1mph - Average wind speed in September:
8.6mph - Average wind speed in October:
10.3mph - Average wind speed in November:
11mph - Average wind speed in December:
10.7mph
The windiest month (with the highest average wind speed) is January (11.5mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).
Average humidity
Northbrook, IL
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Northbrook, IL
- Average rainfall in January:
1.77" - Average rainfall in February:
1.85" - Average rainfall in March:
2.01" - Average rainfall in April:
3.78" - Average rainfall in May:
4.57" - Average rainfall in June:
4.57"
The wettest months (with the highest rainfall) are May and June (4.57").
The driest month (with the least rainfall) is December (1.65").
Average rainfall days
Northbrook, IL
- Average rainfall days in January:
7.3 days - Average rainfall days in February:
6.1 days - Average rainfall days in March:
12.2 days - Average rainfall days in April:
16.5 days - Average rainfall days in May:
19.1 days - Average rainfall days in June:
18.2 days
- Average rainfall days in July:
18.4 days - Average rainfall days in August:
17.7 days - Average rainfall days in September:
14.8 days - Average rainfall days in October:
14.5 days - Average rainfall days in November:
10.8 days - Average rainfall days in December:
9.1 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (6.1 days).
Average snowfall
Northbrook, IL
- Average snowfall in January:
4.84" - Average snowfall in February:
4.65" - Average snowfall in March:
1.22" - Average snowfall in April:
2.44" - Average snowfall in May:
0.08" - Average snowfall in June:
0"
The month with the highest snowfall is January (4.84").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Northbrook, IL
- Average snowfall days in January:
13.1 days - Average snowfall days in February:
11.2 days - Average snowfall days in March:
6.7 days - Average snowfall days in April:
2.3 days - Average snowfall days in May:
0.1 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:
0.3 days - Average snowfall days in November:
3.9 days - Average snowfall days in December:
10 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Northbrook, 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 4min - 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 4min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Northbrook, IL
- Average sunshine days in January:
11.8 days - Average sunshine days in February:
10.9 days - Average sunshine days in March:
13.3 days - Average sunshine days in April:
10.2 days - Average sunshine days in May:
10 days - Average sunshine days in June:
9.2 days
- Average sunshine days in July:
9.3 days - Average sunshine days in August:
10.5 days - Average sunshine days in September:
11.7 days - Average sunshine days in October:
13.4 days - Average sunshine days in November:
15.5 days - Average sunshine days in December:
14.3 days
The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is June (9.2 days).
Average UV index
Northbrook, 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
Northbrook, 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 28).
Average visibility
Northbrook, 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).
Northbrook, Illinois, USA
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