May weather forecast
Tamms, IL

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Weather in May

May, the last month of the spring in Tamms, is a warm month, with an average temperature ranging between min 59.5°F (15.3°C) and max 76.6°F (24.8°C).

Temperature

The shift from April to May brings an increase in the average high-temperature, moving from a refreshing 67.6°F (19.8°C) to a moderately hot 76.6°F (24.8°C). May is noted for a mean low-temperature of 59.5°F (15.3°C).

Humidity

February, March, May and December, with an average relative humidity of 78%, are the most humid months.

Rainfall

In Tamms, during May, the rain falls for 17.1 days and regularly aggregates up to 3.94" (100mm) of precipitation. Throughout the year, in Tamms, Illinois, there are 156.3 rainfall days, and 36.65" (931mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

In Tamms, the average length of the day in May is 14h and 11min.
On the first day of May, sunrise is at 6:01 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 5:38 am and sunset at 8:11 pm CDT.

Sunshine

In Tamms, the average sunshine in May is 9.3h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: In May, the maximum UV index of 6 suggests these recommendations:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in May?

In May, the average high-temperature and low-temperature are 76.6°F (24.8°C) and 59.5°F (15.3°C) respectively.

What are the most humid months in Tamms?

The months with the highest humidity are February, March, May and December, with an average relative humidity of 78%.

What is the average humidity in May?

The average relative humidity in May is 78%.

How many days does it rain in May?

In Tamms, in May, during 17.1 rainfall days, 3.94" (100mm) of precipitation is typically accumulated.

When it does not snow?

May through September are months without snowfall.

Does it snow in May?

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

How many hours of daylight does Tamms have in May?

In May, the average day length is 14h and 11min.

When are sunrise and sunset in May?

In May, on the first day of the month, sunrise is at 6:01 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 5:38 am and sunset at 8:11 pm CDT.

How long on average sun shines in May?

In Tamms, the average sunshine duration in May is 9.3h.

What is the month with the highest UV index in Tamms?

The months with the highest UV index in Tamms, Illinois, are May through August, with an average maximum UV index of 6.

How high is the UV index in May?

In Tamms, the average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high hazard to health from exposure to the Sun's 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
Tamms, IL

Average temperature in May - Tamms, IL
  • Average high temperature in May: 76.6°F

The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (41.2°F).

  • Average low temperature in May: 59.5°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).

Average pressure in May
Tamms, IL

Average pressure in May - Tamms, IL
  • Average pressure in May: 29.97"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in May
Tamms, IL

Average wind speed in May - Tamms, IL
  • Average wind speed in May: 7.6mph

The windiest months (with the highest average wind speed) are January, February and March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

Average humidity in May
Tamms, IL

Average humidity in May - Tamms, IL
  • Average humidity in May: 78%

The months with the highest relative humidity are February, March, May and December (78%).
The month with the lowest relative humidity is October (69%).

Average rainfall in May
Tamms, IL

Average rainfall in May - Tamms, IL
  • Average rainfall in May: 3.94"

The wettest month (with the highest rainfall) is April (4.21").
The driest month (with the least rainfall) is September (1.42").

Average rainfall days in May
Tamms, IL

Average rainfall days in May - Tamms, IL
  • Average rainfall days in May: 17.1 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.8 days).

Average snowfall in May
Tamms, IL

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

The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in May
Tamms, IL

Average snowfall days in May - Tamms, IL
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in May / Average sunshine in May - Tamms, IL
  • Average daylight in May: 14h and 1min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in May: 9h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in May
Tamms, IL

Average sunshine days in May - Tamms, IL
  • Average sunshine days in May: 12.3 days

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (12.3 days).

Average UV index in May
Tamms, IL

Average UV index in May - Tamms, IL
  • Average UV index in May: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in May
Tamms, IL

Average cloud cover in May - Tamms, IL
  • Average cloud cover in May: 38

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 26).

Average visibility in May
Tamms, IL

Average visibility in May - Tamms, 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).

Tamms, Illinois, USA

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