May weather forecast
Bartlett, IL

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Weather in May

May, the last month of the spring in Bartlett, is a pleasant month, with an average temperature varying between 51.1°F (10.6°C) and 68°F (20°C).

Temperature

A rise in the average high-temperature is observed during May, moving from a refreshing 55.8°F (13.2°C) in April to a pleasant 68°F (20°C). During the month of May, the temperature generally drops to a low average of 51.1°F (10.6°C).

Humidity

In May, the average relative humidity is 77%.

Rainfall

The month with the most rainfall is May, when the rain falls for 16.8 days and typically aggregates up to 2.83" (72mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Bartlett aggregates 0.04" (1mm) of snow. In Bartlett, during the entire year, snow falls for 46.4 days and aggregates up to 13.03" (331mm) of snow.

Daylight

In May, the average length of the day in Bartlett is 14h and 35min.
On the first day of May, sunrise is at 5:47 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 5:19 am and sunset at 8:21 pm CDT.

Sunshine

The average sunshine in May is 8.2h.

UV index

In Bartlett, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The daily high UV index of 5 in May translates into this advice:
Take necessary precautions - Protection from skin and eye injury is mandatory. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
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Frequently asked questions

What are the temperatures in Bartlett in May?

The high-temperature during May is 68°F (20°C) and the low-temperature is 51.1°F (10.6°C).

What is the average humidity in May in Bartlett?

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

What is the rainiest month in Bartlett?

May is the month with the most rainfall in Bartlett. Rain falls for 16.8 days and accumulates 2.83" (72mm) of precipitation.

How many days does it rain in May in Bartlett?

In Bartlett, Illinois, during May, the rain falls for 16.8 days and regularly aggregates up to 2.83" (72mm) of precipitation.

What is the last month it snows in Bartlett?

May is the last month it regularly snows in Bartlett, Illinois. During 0.1 snowfall days, in May, Bartlett aggregates 0.04" (1mm) of snow.

What is the average length of the day in May in Bartlett?

The average day length in May is 14h and 35min.

When is the sunrise / sunset in May in Bartlett?

In May, on the first day of the month, sunrise is at 5:47 am and sunset at 7:52 pm. On the last day of the month, in Bartlett, sunrise is at 5:19 am and sunset at 8:21 pm CDT.

How long on average sun shines in May in Bartlett?

In Bartlett, Illinois, the average sunshine duration in May is 8.2h.

How high is the UV index in May in Bartlett?

In Bartlett, Illinois, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Bartlett, IL

Average temperature in May - Bartlett, IL
  • Average high temperature in May: 68°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (27.7°F).

  • Average low temperature in May: 51.1°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).

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Average pressure in May
Bartlett, IL

Average pressure in May - Bartlett, 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
Bartlett, IL

Average wind speed in May - Bartlett, IL
  • Average wind speed in May: 8.2mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

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Average humidity in May
Bartlett, IL

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

The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).

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Average rainfall in May
Bartlett, IL

Average rainfall in May - Bartlett, IL
  • Average rainfall in May: 2.83"

The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is December (1.02").

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Average rainfall days in May
Bartlett, IL

Average rainfall days in May - Bartlett, IL
  • Average rainfall days in May: 16.8 days

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is February (4.8 days).

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Average snowfall in May
Bartlett, IL

Average snowfall in May - Bartlett, IL
  • Average snowfall in May: 0.04"

The month with the highest snowfall is January (3.39").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Bartlett, IL

Average snowfall days in May - Bartlett, IL
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (12.3 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
Bartlett, IL

Average daylight in May / Average sunshine in May - Bartlett, 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 1min

The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

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Average sunshine days in May
Bartlett, IL

Average sunshine days in May - Bartlett, IL
  • Average sunshine days in May: 11.4 days

The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is July (10.9 days).

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Average UV index in May
Bartlett, IL

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

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in May
Bartlett, IL

Average cloud cover in May - Bartlett, IL
  • Average cloud cover in May: 44

The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July, August and September (Cloud cover 33).

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Average visibility in May
Bartlett, IL

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

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).

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Bartlett, Illinois, USA

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