Climate and monthly weather forecast
Pontoon Beach, IL

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Weather in January

January, like December, in Pontoon Beach, Illinois, is a wintry winter month, with an average temperature fluctuating between 37.2°F (2.9°C) and 24.3°F (-4.3°C). The coldest period is January, when temperatures fluctuate between an average high of 37.2°F (2.9°C) and a low of 24.3°F (-4.3°C). Weather in January »

Weather in February

February, the last month of the winter in Pontoon Beach, is also a wintry month, with an average temperature varying between 27.5°F (-2.5°C) and 42.3°F (5.7°C). The arrival of February coincides with an average high-temperature of a still cold 42.3°F (5.7°C), indicating a minimal shift from January's 37.2°F (2.9°C). Weather in February »

Weather in March

The first month of the spring, March, is a fresh month in Pontoon Beach, Illinois, with an average temperature ranging between min 37.9°F (3.3°C) and max 54.1°F (12.3°C). A rise in the average high-temperature is observed during March, moving from an icy 42.3°F (5.7°C) in February to a cool 54.1°F (12.3°C). Weather in March »

Weather in April

April is a refreshing spring month in Pontoon Beach, Illinois, with temperature in the range of an average low of 48°F (8.9°C) and an average high of 65.1°F (18.4°C). The start of April brings a shift in the average high-temperature, increasing from March's cool 54.1°F (12.3°C) to a refreshing 65.1°F (18.4°C). Weather in April »

Weather in May

The last month of the spring, May, is a warm month in Pontoon Beach, Illinois, with an average temperature fluctuating between 57.7°F (14.3°C) and 74.7°F (23.7°C). The start of May signals an increase in the average high-temperature, moving from a comfortable 65.1°F (18.4°C) in April to a warm 74.7°F (23.7°C). Weather in May »

Weather in June

June, the first month of the summer in Pontoon Beach, is also a moderately hot month, with temperature in the range of an average low of 66.7°F (19.3°C) and an average high of 83.8°F (28.8°C). An increase in the average high-temperature marks June, moving from May's 74.7°F (23.7°C) to a still warm 83.8°F (28.8°C). Weather in June »

Weather in July

July is a hot summer month in Pontoon Beach, Illinois, with an average temperature ranging between min 68.5°F (20.3°C) and max 86.2°F (30.1°C). Pontoon Beach's warmest temperatures are experienced in July, with average high temperatures of 86.2°F (30.1°C) and lows of 68.5°F (20.3°C). The heat index value during July is estimated at a very hot 98.6°F (37°C). Weather in July »

Weather in August

August, the last month of the summer in Pontoon Beach, is also a moderately hot month, with temperature in the range of an average low of 66.7°F (19.3°C) and an average high of 84.7°F (29.3°C). August's arrival shows an average high-temperature of a warm 84.7°F (29.3°C), hardly different from the previous month. Weather in August »

Weather in September

September, the first month of the autumn in Pontoon Beach, is also a moderately hot month, with an average temperature varying between 59.9°F (15.5°C) and 79.3°F (26.3°C). With the arrival of September, Pontoon Beach notices a mild change in the average high-temperature, sliding from August's warm 84.7°F (29.3°C) to a still moderately hot 79.3°F (26.3°C). Weather in September »

Weather in October

October, the same as September, is another refreshing autumn month in Pontoon Beach, Illinois, with an average temperature varying between 49.3°F (9.6°C) and 66.2°F (19°C). The shift to October brings a decrease in the average high-temperature, falling from a warm 79.3°F (26.3°C) in September to an enjoyable 66.2°F (19°C). Weather in October »

Weather in November

November, the last month of the autumn in Pontoon Beach, is also a fresh month, with an average temperature ranging between max 52.9°F (11.6°C) and min 37.9°F (3.3°C). A decrease in the average high-temperature is observed during November, shifting from a comfortable 66.2°F (19°C) in October to a fresh 52.9°F (11.6°C). Weather in November »

Weather in December

December, the first month of the winter in Pontoon Beach, is also an icy month, with temperature in the range of an average high of 41.9°F (5.5°C) and an average low of 30.2°F (-1°C). December's onset brings a slight change in high-temperatures, falling from a fresh 52.9°F (11.6°C) in November to a wintry 41.9°F (5.5°C). Weather in December »
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Frequently asked questions

What part of the year is the coldest in Pontoon Beach?

January, marked by an average high-temperature of 37.2°F (2.9°C) and a low-temperature of 24.3°F (-4.3°C), is the coldest month.

How much does it rain in Pontoon Beach?

In Pontoon Beach, Illinois, during the entire year, the rain falls for 159.5 days and collects up to 36.06" (916mm) of precipitation.

When does it snow in Pontoon Beach?

January through March, November and December are months with snowfall in Pontoon Beach, Illinois.

How much does it snow in Pontoon Beach?

In Pontoon Beach, Illinois, during the entire year, snow falls for 20.3 days and aggregates up to 8.07" (205mm) of snow.

What is the month with the least sunshine in Pontoon Beach?

The month with the least sunshine is January, with an average of 4.6h of sunshine.

What are the months with the lowest UV index in Pontoon Beach?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the driest month in Pontoon Beach?

February is the month with the least rainfall in Pontoon Beach. Rain falls for 8.8 days and accumulates 1.93" (49mm) of precipitation.

What is the snowiest month in Pontoon Beach?

February is the month with the most snowfall. Snow falls for 5.8 days and accumulates 2.4" (61mm) of snow.

When is Daylight Saving Time (DST) in Pontoon Beach?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Pontoon Beach, Illinois, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.

When it does not snow in Pontoon Beach?

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

What is the most humid month in Pontoon Beach?

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

What is the rainiest month in Pontoon Beach?

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.

What is the month with the highest UV index in Pontoon Beach?

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

When are the longest days in Pontoon Beach?

The month with the longest days in Pontoon Beach, Illinois, is June, with an average of 14h and 48min of daylight.

What month has the most sunshine in Pontoon Beach?

The month with the most sunshine is June, with an average of 10.5h of sunshine.

What are the warmest months in Pontoon Beach?

July registers as the month with the average highest temperatures in Pontoon Beach, reaching 86.2°F (30.1°C) at its peak and 68.5°F (20.3°C) at the lowest.

What is the least humid month in Pontoon Beach?

With an average relative humidity of 71%, October is the least humid month in Pontoon Beach.

What is the month with the shortest days in Pontoon Beach?

With an average of 9h and 30min of daylight, December has the shortest days of the year in Pontoon Beach.

Average temperature
Pontoon Beach, IL

Average temperature - Pontoon Beach, IL

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).

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).

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Average pressure
Pontoon Beach, IL

Average pressure - Pontoon Beach, IL

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

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Average wind speed
Pontoon Beach, IL

Average wind speed - Pontoon Beach, IL

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).

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Average rainfall
Pontoon Beach, IL

Average rainfall - Pontoon Beach, IL

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

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Average rainfall days
Pontoon Beach, IL

Average rainfall days - Pontoon Beach, IL

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).

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Average snowfall
Pontoon Beach, IL

Average snowfall - Pontoon Beach, IL

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").

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Average snowfall days
Pontoon Beach, IL

Average snowfall days - Pontoon Beach, IL

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).

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Average daylight / Average sunshine
Pontoon Beach, IL

Average daylight / Average sunshine - Pontoon Beach, IL

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).

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).

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Average sunshine days
Pontoon Beach, IL

Average sunshine days - Pontoon Beach, IL

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

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Average UV index
Pontoon Beach, IL

Average UV index - Pontoon Beach, IL

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).

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Average visibility
Pontoon Beach, IL

Average visibility - Pontoon Beach, IL

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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Pontoon Beach, Illinois, USA

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