May weather forecast
Deerfield, IL

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Weather in May

May, the last month of the spring in Deerfield, is a refreshing month, with an average temperature ranging between min 49.6°F (9.8°C) and max 61.2°F (16.2°C).

Temperature

As May begins, there is an increase in the average high-temperature, moving from a cool 50.9°F (10.5°C) in April to a comfortable 61.2°F (16.2°C). During May, the average low-temperature is recorded at a frosty 49.6°F (9.8°C).

Humidity

In May, the average relative humidity is 79%.

Rainfall

The wettest months in Deerfield are May and June, with an average 3.82" (97mm) of rainfall.

Snowfall

In Deerfield, snow does not fall in May through September.

Daylight

The average length of the day in May is 14h and 36min.
On the first day of the month, sunrise is at 5:45 am and sunset at 7:51 pm. On the last day of May, sunrise is at 5:17 am and sunset at 8:20 pm CDT.

Sunshine

In May, the average sunshine in Deerfield is 8.9h.

UV index

The average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 4 in May interprets into the following advice:
Be vigilant - Preventing sunburn is recommended. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
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Frequently asked questions

What are the temperatures in Deerfield in May?

In Deerfield, 61.2°F (16.2°C) is the average high-temperature and 49.6°F (9.8°C) is the average low-temperature during May.

What is the average humidity in May in Deerfield?

In Deerfield, the average relative humidity in May is 79%.

What is the wettest month in Deerfield?

The wettest months in Deerfield, Illinois, are May and June, with an average 3.82" (97mm) of rainfall.

How much does it rain in Deerfield in May?

In Deerfield, Illinois, in May, during 17.7 rainfall days, 3.82" (97mm) of precipitation is typically accumulated.

When it does not snow in Deerfield?

In Deerfield, snow does not fall in May through September.

Does it snow in Deerfield in May?

In May, it doesn't snow. April is the latest month when it typically snows.

How many hours of daylight does Deerfield have in May?

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

When is the sunrise / sunset in May in Deerfield?

On the first day of May in Deerfield, sunrise is at 5:45 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 5:17 am and sunset at 8:20 pm CDT.

How many hours of sunshine does Deerfield have in May?

In May, the average sunshine duration in Deerfield is 8.9h.

What is the UV index reading in May in Deerfield?

The average daily maximum UV index in May in Deerfield, Illinois, is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Deerfield, IL

Average temperature in May - Deerfield, IL
  • Average high temperature in May: 61.2°F

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).

  • Average low temperature in May: 49.6°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).

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Average pressure in May
Deerfield, IL

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

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Average wind speed in May
Deerfield, IL

Average wind speed in May - Deerfield, IL
  • Average wind speed in May: 9.1mph

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).

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Average humidity in May
Deerfield, IL

Average humidity in May - Deerfield, IL
  • Average humidity in May: 79%

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

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Average rainfall in May
Deerfield, IL

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

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Average rainfall days in May
Deerfield, IL

Average rainfall days in May - Deerfield, IL
  • Average rainfall days in May: 17.7 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).

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Average snowfall in May
Deerfield, IL

Average snowfall in May - Deerfield, IL
  • Average snowfall in May: 0"

The month with the highest snowfall is January (4.13").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in May
Deerfield, IL

Average snowfall days in May - Deerfield, IL
  • Average snowfall days in May: 0 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).

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

Average daylight in May / Average sunshine in May - Deerfield, IL
  • Average daylight in May: 14h and 4min

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 May: 8h and 5min

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).

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Average sunshine days in May
Deerfield, IL

Average sunshine days in May - Deerfield, IL
  • Average sunshine days in May: 11.2 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).

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Average UV index in May
Deerfield, IL

Average UV index in May - Deerfield, IL
  • Average UV index in May: 4

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
Deerfield, IL

Average cloud cover in May - Deerfield, 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 27).

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Average visibility in May
Deerfield, IL

Average visibility in May - Deerfield, 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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Deerfield, Illinois, USA

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