Climate and monthly weather forecast
Addison, IL

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Weather in January

January, like December, is a freezing cold winter month in Addison, Illinois, with an average temperature fluctuating between 28.8°F (-1.8°C) and 18°F (-7.8°C). The coldest period is January, when temperatures fluctuate between an average high of 28.8°F (-1.8°C) and a low of 18°F (-7.8°C). Weather in January »

Weather in February

February, the last month of the winter in Addison, is an icy month, with an average temperature varying between 32.4°F (0.2°C) and 20.7°F (-6.3°C). Addison notes an average high-temperature of a wintry 32.4°F (0.2°C) in February, displaying minor variation from January. Weather in February »

Weather in March

March, the first month of the spring in Addison, is a frosty month, with temperature in the range of an average high of 44.2°F (6.8°C) and an average low of 31.5°F (-0.3°C). With the beginning of March, Addison's average high-temperature sees an increase, transitioning from an icy 32.4°F (0.2°C) in February to a frosty 44.2°F (6.8°C). Weather in March »

Weather in April

April is a fresh spring month in Addison, Illinois, with an average temperature varying between 55.2°F (12.9°C) and 40.6°F (4.8°C). The shift from March to April sees an increase in the average high-temperature, transitioning from a frosty 44.2°F (6.8°C) to a cool 55.2°F (12.9°C). Weather in April »

Weather in May

The last month of the spring, May, is a comfortable month in Addison, Illinois, with temperature in the range of an average low of 51.6°F (10.9°C) and an average high of 67.3°F (19.6°C). Addison's weather in May shows a rise in the average high-temperature, moving up from April's cool 55.2°F (12.9°C) to an enjoyable 67.3°F (19.6°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Addison, Illinois, with an average temperature fluctuating between 61.2°F (16.2°C) and 76.8°F (24.9°C). In Addison, the average high-temperature in June increases from a refreshing 67.3°F (19.6°C) in May to a moderately hot 76.8°F (24.9°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Addison, Illinois, with an average temperature ranging between min 66.6°F (19.2°C) and max 81.9°F (27.7°C). In Addison, temperatures reach their average annual highs in July, measuring 81.9°F (27.7°C) and a minimum average of 66.6°F (19.2°C). The heat index value for July is computed to be a tropical 87.8°F (31°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Addison, Illinois, with an average temperature varying between 65.7°F (18.7°C) and 80.2°F (26.8°C). August's onset brings an average high-temperature of a still warm 80.2°F (26.8°C), showing a minute difference from July's 81.9°F (27.7°C). Weather in August »

Weather in September

September, the first month of the autumn in Addison, is still a warm month, with an average temperature ranging between min 58.6°F (14.8°C) and max 73.4°F (23°C). The arrival of September correlates with a minor temperature reduction, down from August's moderately hot 80.2°F (26.8°C) to a still warm 73.4°F (23°C). Weather in September »

Weather in October

October, the same as September, in Addison, Illinois, is another mild autumn month, with an average temperature varying between 60.4°F (15.8°C) and 46.6°F (8.1°C). Addison's average high-temperature decreases in October, falling from a warm 73.4°F (23°C) in September to a mild 60.4°F (15.8°C). Weather in October »

Weather in November

November, the last month of the autumn in Addison, is another chilly month, with an average temperature fluctuating between 33.6°F (0.9°C) and 45.9°F (7.7°C). The arrival of November is marked by a notable decrease in high-temperatures, falling from a moderate 60.4°F (15.8°C) in October to a chilly 45.9°F (7.7°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Addison, Illinois, with an average temperature ranging between max 34.7°F (1.5°C) and min 25.2°F (-3.8°C). Addison's weather in December involves a decrease in the average high-temperature, moving down from November's chilly 45.9°F (7.7°C) to a wintry 34.7°F (1.5°C). Weather in December »
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Frequently asked questions

What are the coldest months in Addison?

January is the coldest month, with an average high-temperature of 28.8°F (-1.8°C) and an average low-temperature of 18°F (-7.8°C).

What is the most humid month in Addison?

The months with the highest humidity in Addison are January and February, with an average relative humidity of 82%.

How many days does it rain in Addison?

Throughout the year, in Addison, Illinois, there are 149.4 rainfall days, and 25.08" (637mm) of precipitation is accumulated.

When does it snow in Addison?

Months with snowfall are January through May, October through December.

How much does it snow in Addison?

In Addison, Illinois, during the entire year, snow falls for 45.8 days and aggregates up to 14.25" (362mm) of snow.

What is the month with the least sunshine in Addison?

The month with the least sunshine is January, with an average of 3.7h of sunshine.

When is the lowest UV index in Addison?

The months with the lowest UV index in Addison are January and December, with an average maximum UV index of 1.

When does it snow the most in Addison?

February is the month with the most snowfall in Addison. Snow falls for 10.9 days and accumulates 3.86" (98mm) of snow.

When is Daylight Saving Time (DST) in Addison?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Addison, 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.

What is the rainiest month in Addison?

May is the month with the most rainfall. Rain falls for 17.3 days and accumulates 3.11" (79mm) of precipitation.

When it does not snow in Addison?

June through September are months without snowfall in Addison, Illinois.

When are the longest days in Addison?

June has the longest days of the year in Addison, Illinois, with an average of 15h and 12min of daylight.

What are the months with the highest UV index in Addison?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Addison.

What month is the hottest in Addison?

July, having an average high-temperature of 81.9°F (27.7°C) and an average low-temperature of 66.6°F (19.2°C), is the warmest month in Addison, Illinois.

What are the months with the most sunshine in Addison?

July and August, with an average of 10.1h of sunshine, are months with the most sunshine.

What is the least humid month in Addison?

With an average relative humidity of 72%, October is the least humid month in Addison, Illinois.

What is the driest month in Addison?

The month with the least rainfall in Addison, Illinois, is December, when the rain falls for 7.9 days and typically collects 1.14" (29mm) of precipitation.

What is the month with the shortest days in Addison?

The month with the shortest days in Addison, Illinois, is December, with an average of 9h and 12min of daylight.

Average temperature
Addison, IL

Average temperature - Addison, IL

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (28.8°F).

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).

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Average pressure
Addison, IL

Average pressure - Addison, IL

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
Addison, IL

Average wind speed - Addison, IL

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

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Average humidity
Addison, IL

Average humidity - Addison, IL

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
Addison, IL

Average rainfall - Addison, IL

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is December (1.14").

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Average rainfall days
Addison, IL

Average rainfall days - Addison, IL

The months with the highest number of rainy days are May and July (17.3 days).
The month with the least rainy days is February (5.1 days).

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Average snowfall
Addison, IL

Average snowfall - Addison, IL

The month with the highest snowfall is February (3.86").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Addison, IL

Average snowfall days - Addison, IL

The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Addison, IL

Average daylight / Average sunshine - Addison, IL

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).

The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days
Addison, IL

Average sunshine days - Addison, IL

The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is July (9.5 days).

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Average visibility
Addison, IL

Average visibility - Addison, 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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Addison, Illinois, USA

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