May weather forecast
Northbrook, IL

Weather in May

May, the last month of the spring in Northbrook, is a comfortable month, with an average temperature varying between 62.8°F (17.1°C) and 50.4°F (10.2°C).

Temperature

In Northbrook, the average high-temperature in May increases from a cool 52°F (11.1°C) in April to a comfortable 62.8°F (17.1°C). The average low-temperature, in May, is 50.4°F (10.2°C).

Humidity

In Northbrook, Illinois, the average relative humidity in May is 77%.

Rainfall

The wettest months are May and June, with an average 4.57" (116mm) of rainfall.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, Northbrook aggregates 0.08" (2mm) of snow. Throughout the year, in Northbrook, Illinois, there are 47.6 snowfall days, and 17.8" (452mm) of snow is accumulated.

Daylight

In Northbrook, the average length of the day in May is 14h and 36min.
On the first day of May, sunrise is at 5:46 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 5:18 am and sunset at 8:19 pm CDT.

Sunshine

In May, the average sunshine is 8.7h.

UV index

In Northbrook, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: In May, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in May in Northbrook?

The average high-temperature, in May, in Northbrook, is 62.8°F (17.1°C), while the average low-temperature is 50.4°F (10.2°C).

What is the average humidity in May in Northbrook?

The average relative humidity in May in Northbrook, Illinois, is 77%.

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.

How much does it rain in Northbrook in May?

In Northbrook, Illinois, during May, the rain falls for 19.1 days and regularly aggregates up to 4.57" (116mm) of precipitation.

What is the last month it snows in Northbrook?

May is the last month it regularly snows in Northbrook, Illinois. During 0.1 snowfall days, in May, Northbrook aggregates 0.08" (2mm) of snow.

How many hours of daylight does Northbrook have in May?

In Northbrook, Illinois, the average day length in May is 14h and 36min.

What time are sunrise and sunset in May in Northbrook?

In May, on the first day of the month, sunrise is at 5:46 am and sunset at 7:50 pm. On the last day of the month, in Northbrook, Illinois, sunrise is at 5:18 am and sunset at 8:19 pm CDT.

How long on average sun shines in May in Northbrook?

In May, the average sunshine duration is 8.7h.

What is the UV index intensity in May in Northbrook?

In Northbrook, Illinois, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Northbrook, IL

Average temperature in May - Northbrook, IL
  • Average high temperature in May: 62.8°F

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).

  • Average low temperature in May: 50.4°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).

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Average pressure in May
Northbrook, IL

Average pressure in May - Northbrook, IL
  • Average pressure in May: 29.96"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).

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Average wind speed in May
Northbrook, IL

Average wind speed in May - Northbrook, IL
  • Average wind speed in May: 8.9mph

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).

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Average humidity in May
Northbrook, IL

Average humidity in May - Northbrook, IL
  • Average humidity in May: 77%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in May
Northbrook, IL

Average rainfall in May - Northbrook, IL
  • Average rainfall in May: 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").

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Average rainfall days in May
Northbrook, IL

Average rainfall days in May - Northbrook, IL
  • Average rainfall days in May: 19.1 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).

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Average snowfall in May
Northbrook, IL

Average snowfall in May - Northbrook, IL
  • Average snowfall in May: 0.08"

The month with the highest snowfall is January (4.84").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Northbrook, IL

Average snowfall days in May - Northbrook, IL
  • Average snowfall days in May: 0.1 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).

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Average daylight in May /
Average sunshine in May
Northbrook, IL

Average daylight in May / Average sunshine in May - Northbrook, IL
  • Average daylight in May: 14h and 36min

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 10min).

  • Average sunshine in May: 8h and 42min

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).

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Average sunshine days in May
Northbrook, IL

Average sunshine days in May - Northbrook, IL
  • Average sunshine days in May: 10 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).

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Average UV index in May
Northbrook, IL

Average UV index in May - Northbrook, IL
  • Average UV index in May: 5

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).

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Average cloud cover in May
Northbrook, IL

Average cloud cover in May - Northbrook, IL
  • Average cloud cover in May: 41

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).

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Average visibility in May
Northbrook, IL

Average visibility in May - Northbrook, IL
  • Average visibility in May: 6mi

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).

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