May weather forecast
Clarendon Hills, IL

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Weather in May

The last month of the spring, May, is a pleasant month in Clarendon Hills, Illinois, with an average temperature ranging between max 68.9°F (20.5°C) and min 52.2°F (11.2°C).

Temperature

With the onset of May, Clarendon Hills experiences a temperature shift, with the average high-temperature moving from a moderate 56.5°F (13.6°C) in April to an agreeable 68.9°F (20.5°C). During May nights, Clarendon Hills records an average temperature of 52.2°F (11.2°C).

Humidity

In May, the average relative humidity in Clarendon Hills is 75%.

Rainfall

May is the month with the most rainfall. Rain falls for 14.9 days and accumulates 1.97" (50mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In Clarendon Hills, the average length of the day in May is 14h and 34min.
On the first day of the month, sunrise is at 5:46 am and sunset at 7:50 pm. On the last day of May, sunrise is at 5:19 am and sunset at 8:19 pm CDT.

Sunshine

In May, the average sunshine in Clarendon Hills, Illinois, is 8.5h.

UV index

In Clarendon Hills, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: In May, an average UV index of 5 transforms into the following instructions:
Act with care - The suggestion to avoid sunburn is emphasized. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
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Frequently asked questions

What is the temperature in May in Clarendon Hills?

In May, in Clarendon Hills, the average high-temperature is 68.9°F (20.5°C), and the average low-temperature is 52.2°F (11.2°C).

What is the average humidity in May in Clarendon Hills?

In Clarendon Hills, the average relative humidity in May is 75%.

What is the rainiest month in Clarendon Hills?

May is the month with the most rainfall in Clarendon Hills, Illinois. Rain falls for 14.9 days and accumulates 1.97" (50mm) of precipitation.

How many days does it rain in May in Clarendon Hills?

In Clarendon Hills, in May, it is raining for 14.9 days, with typically 1.97" (50mm) of accumulated precipitation.

When it does not snow in Clarendon Hills?

May through September are months without snowfall in Clarendon Hills, Illinois.

Does it snow in Clarendon Hills in May?

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

What is the average length of the day in May in Clarendon Hills?

In Clarendon Hills, the average day length in May is 14h and 34min.

When are sunrise and sunset in May in Clarendon Hills?

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, sunrise is at 5:19 am and sunset at 8:19 pm CDT.

How long on average sun shines in May in Clarendon Hills?

In May, the average sunshine duration is 8.5h.

What is the UV index reading in May in Clarendon Hills?

The average daily maximum UV index in May in Clarendon Hills, Illinois, is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
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
Clarendon Hills, IL

Average temperature in May - Clarendon Hills, IL
  • Average high temperature in May: 68.9°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in May: 52.2°F

The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in May
Clarendon Hills, IL

Average pressure in May - Clarendon Hills, 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
Clarendon Hills, IL

Average wind speed in May - Clarendon Hills, IL
  • Average wind speed in May: 8mph

The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

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Average humidity in May
Clarendon Hills, IL

Average humidity in May - Clarendon Hills, IL
  • Average humidity in May: 75%

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in May
Clarendon Hills, IL

Average rainfall in May - Clarendon Hills, IL
  • Average rainfall in May: 1.97"

The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is December (0.63").

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Average rainfall days in May
Clarendon Hills, IL

Average rainfall days in May - Clarendon Hills, IL
  • Average rainfall days in May: 14.9 days

The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is February (4.2 days).

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Average snowfall in May
Clarendon Hills, IL

Average snowfall in May - Clarendon Hills, IL
  • Average snowfall in May: 0"

The month with the highest snowfall is February (2.28").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in May
Clarendon Hills, IL

Average snowfall days in May - Clarendon Hills, IL
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (9.7 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
Clarendon Hills, IL

Average daylight in May / Average sunshine in May - Clarendon Hills, 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 3min

The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in May
Clarendon Hills, IL

Average sunshine days in May - Clarendon Hills, IL
  • Average sunshine days in May: 13.7 days

The month with the most sunshine days is December (20.7 days).
The month with the least sunshine days is July (11.8 days).

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Average UV index in May
Clarendon Hills, IL

Average UV index in May - Clarendon Hills, 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 January (UV index 1).

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Average cloud cover in May
Clarendon Hills, IL

Average cloud cover in May - Clarendon Hills, IL
  • Average cloud cover in May: 43

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in May
Clarendon Hills, IL

Average visibility in May - Clarendon Hills, 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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Clarendon Hills, Illinois, USA

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