May weather forecast
Pontoon Beach, IL

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Weather in May

The last month of the spring, May, is a warm month in Pontoon Beach, Illinois, with temperature in the range of an average low of 57.7°F (14.3°C) and an average high of 74.7°F (23.7°C).

Temperature

May's onset witnesses a shift in the average high-temperature, moving from a comfortable 65.1°F (18.4°C) in April to a moderately hot 74.7°F (23.7°C). Pontoon Beach experiences a steady low-temperature of 57.7°F (14.3°C) throughout May.

Humidity

With an average relative humidity of 78%, May is the most humid month.

Rainfall

May is the month with the most rainfall. Rain falls for 17.8 days and accumulates 4.21" (107mm) of precipitation.

Snowfall

In Pontoon Beach, snow does not fall in April through October.

Daylight

The average length of the day in May is 14h and 18min.
On the first day of May, sunrise is at 6:01 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 5:37 am and sunset at 8:18 pm CDT.

Sunshine

In Pontoon Beach, the average sunshine in May is 9.5h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In May, the maximum UV index of 6 suggests this advice:
Shield from overexposure. Defense against sun-related harm is required. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Pontoon Beach in May?

The average high-temperature, in May, in Pontoon Beach, is 74.7°F (23.7°C), while the average low-temperature is 57.7°F (14.3°C).

What is the most humid month?

With an average relative humidity of 78%, May is the most humid month.

What is the average humidity in May in Pontoon Beach?

In May, the average relative humidity is 78%.

What is the rainiest month?

The month with the most rainfall is May, when the rain falls for 17.8 days and typically aggregates up to 4.21" (107mm) of precipitation.

How much does it rain in May?

In Pontoon Beach, in May, during 17.8 rainfall days, 4.21" (107mm) of precipitation is typically accumulated.

When it does not snow?

April through October are months without snowfall.

How many hours of daylight does Pontoon Beach have in May?

In May, the average day length is 14h and 18min.

When is the sunrise / sunset in May?

In May, on the first day of the month, sunrise is at 6:01 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 5:37 am and sunset at 8:18 pm CDT.

How long on average sun shines in May?

The average sunshine duration in May is 9.5h.

What is the month with the highest UV index?

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

What is the UV index intensity in May?

In Pontoon Beach, the average daily maximum UV index in May is 6. A UV Index estimate of 6 to 7 represents a high health risk 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
Pontoon Beach, IL

Average temperature in May - Pontoon Beach, IL
  • Average high temperature in May: 74.7°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (37.2°F).

  • Average low temperature in May: 57.7°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

Average pressure in May
Pontoon Beach, IL

Average pressure in May - Pontoon Beach, IL
  • Average pressure in May: 29.96"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in May
Pontoon Beach, IL

Average wind speed in May - Pontoon Beach, IL
  • Average wind speed in May: 7.3mph

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).

Average humidity in May
Pontoon Beach, IL

Average humidity in May - Pontoon Beach, IL
  • Average humidity in May: 78%

The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).

Average rainfall in May
Pontoon Beach, IL

Average rainfall in May - Pontoon Beach, IL
  • Average rainfall in May: 4.21"

The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is February (1.93").

Average rainfall days in May
Pontoon Beach, IL

Average rainfall days in May - Pontoon Beach, IL
  • Average rainfall days in May: 17.8 days

The months with the highest number of rainy days are May and July (17.8 days).
The month with the least rainy days is January (8.4 days).

Average snowfall in May
Pontoon Beach, IL

Average snowfall in May - Pontoon Beach, IL
  • Average snowfall in May: 0"

The month with the highest snowfall is February (2.4").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in May
Pontoon Beach, IL

Average snowfall days in May - Pontoon Beach, IL
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (6.3 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
Pontoon Beach, IL

Average daylight in May / Average sunshine in May - Pontoon Beach, IL
  • Average daylight in May: 14h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in May: 9h and 3min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

Average sunshine days in May
Pontoon Beach, IL

Average sunshine days in May - Pontoon Beach, IL
  • Average sunshine days in May: 10.7 days

The month with the most sunshine days is December (18 days).
The month with the least sunshine days is June (10.1 days).

Average UV index in May
Pontoon Beach, IL

Average UV index in May - Pontoon Beach, 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, November and December (UV index 2).

Average cloud cover in May
Pontoon Beach, IL

Average cloud cover in May - Pontoon Beach, IL
  • Average cloud cover in May: 37

The month with the most cloud cover is January (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 28).

Average visibility in May
Pontoon Beach, IL

Average visibility in May - Pontoon Beach, 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).

Pontoon Beach, Illinois, USA

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