Climate and monthly weather forecast
Madison, IL

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Weather in January

January, like December, in Madison, Illinois, is an icy winter month, with an average temperature varying between 24.3°F (-4.3°C) and 37.2°F (2.9°C). The coldest month is January, with an average high-temperature of 37.2°F (2.9°C) and an average low-temperature of 24.3°F (-4.3°C). Weather in January »

Weather in February

February, the last month of the winter in Madison, is also an icy month, with an average temperature varying between 42.3°F (5.7°C) and 27.5°F (-2.5°C). The commencement of February records an average high-temperature of a still wintry 42.3°F (5.7°C), barely varying from January's 37.2°F (2.9°C). Weather in February »

Weather in March

March, the first month of the spring in Madison, is a fresh month, with temperature in the range of an average low of 37.9°F (3.3°C) and an average high of 54.1°F (12.3°C). March's arrival coincides with a rise in the average high-temperature, moving from February's icy 42.3°F (5.7°C) to a cool 54.1°F (12.3°C). Weather in March »

Weather in April

April in Madison, Illinois, is a comfortable spring month, with an average temperature ranging between max 65.1°F (18.4°C) and min 48°F (8.9°C). With the onset of April, the average high-temperature slightly shifts from March's cool 54.1°F (12.3°C) to a comfortable 65.1°F (18.4°C). Weather in April »

Weather in May

May, the last month of the spring in Madison, is a warm month, with an average temperature fluctuating between 74.7°F (23.7°C) and 57.7°F (14.3°C). In Madison, stepping into May brings a temperature increase, moving up from April's refreshing 65.1°F (18.4°C) to a moderately hot 74.7°F (23.7°C). Weather in May »

Weather in June

The first month of the summer, June, is still a warm month in Madison, Illinois, with an average temperature varying between 66.7°F (19.3°C) and 83.8°F (28.8°C). June signals a shift in the average high-temperature, 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 Madison, Illinois, with an average temperature ranging between min 68.5°F (20.3°C) and max 86.2°F (30.1°C). Temperature readings reach their annual highs in July, averaging 86.2°F (30.1°C) and a minimum average of 68.5°F (20.3°C). For most parts of July, the heat index is appraised at a very hot 98.6°F (37°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Madison, Illinois, with an average temperature varying between 66.7°F (19.3°C) and 84.7°F (29.3°C). The shift from July to August is characterized by an average high-temperature of a warm 84.7°F (29.3°C), not significantly different from the 86.2°F (30.1°C) of July. Weather in August »

Weather in September

September, the first month of the autumn in Madison, is still a warm month, with an average temperature varying between 79.3°F (26.3°C) and 59.9°F (15.5°C). September signifies a minor drop in average high-temperature, transitioning from a warm 84.7°F (29.3°C) in August to a still moderately hot 79.3°F (26.3°C). Weather in September »

Weather in October

October, like September, in Madison, Illinois, is another comfortable autumn month, with an average temperature varying between 49.3°F (9.6°C) and 66.2°F (19°C). Madison's weather in October involves a decrease in the average high-temperature, moving down from September's warm 79.3°F (26.3°C) to a comfortable 66.2°F (19°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cool month in Madison, Illinois, with an average temperature ranging between min 37.9°F (3.3°C) and max 52.9°F (11.6°C). November's arrival corresponds with a decrease in average high-temperatures, from October's comfortable 66.2°F (19°C) to a fresh 52.9°F (11.6°C). Weather in November »

Weather in December

The first month of the winter, December, is also an icy month in Madison, Illinois, with temperature in the range of an average low of 30.2°F (-1°C) and an average high of 41.9°F (5.5°C). As December arrives, Madison's weather displays a decrease in high-temperatures, transitioning from November's fresh 52.9°F (11.6°C) to an icy 41.9°F (5.5°C). Weather in December »
Updated: Aug 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month?

With average high and low temperatures of 37.2°F (2.9°C) and 24.3°F (-4.3°C) respectively, January is Madison's coldest month.

How much does it rain?

Throughout the year, there are 159.5 rainfall days, and 36.06" (916mm) of precipitation is accumulated.

When does it snow?

January through March, November and December are months with snowfall.

How much does it snow?

Throughout the year, there are 20.3 snowfall days, and 8.07" (205mm) of snow is accumulated.

What is the month with the least sunshine?

With an average of 4.6h of sunshine, January has the least sunshine of the year.

What is the month with the lowest UV index?

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?

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

When does it snow the most?

The month with the most snowfall is February, when snow falls for 5.8 days and typically aggregates up to 2.4" (61mm) of snow.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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 Madison, snow does not fall in April through October.

What is the most humid month?

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

What is the wettest 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.

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.

When are the longest days?

June has the longest days of the year, with an average of 14h and 48min of daylight.

What month has the most sunshine?

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

What are the warmest months?

Madison, Illinois, experiences its average highest temperatures in July, reaching a peak of 86.2°F (30.1°C) and a minimum of 68.5°F (20.3°C).

What is the least humid month?

The least humid month is October, with an average relative humidity of 71%.

What is the month with the shortest days in Madison?

The month with the shortest days is December, with an average of 9h and 30min of daylight.

Average temperature
Madison, IL

Average temperature - Madison, 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).

Average pressure
Madison, IL

Average pressure - Madison, 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).

Average wind speed
Madison, IL

Average wind speed - Madison, 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).

Average rainfall
Madison, IL

Average rainfall - Madison, IL

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
Madison, IL

Average rainfall days - Madison, 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).

Average snowfall
Madison, IL

Average snowfall - Madison, 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").

Average snowfall days
Madison, IL

Average snowfall days - Madison, 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).

Average daylight / Average sunshine
Madison, IL

Average daylight / Average sunshine - Madison, 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).

Average sunshine days
Madison, IL

Average sunshine days - Madison, IL

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
Madison, IL

Average UV index - Madison, 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).

Average visibility
Madison, IL

Average visibility - Madison, 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).

Madison, Illinois, USA

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