Climate and monthly weather forecast
Savanna, IL

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Weather in January

January, the same as December, in Savanna, Illinois, is a freezing cold winter month, with temperature in the range of an average high of 26.1°F (-3.3°C) and an average low of 13.5°F (-10.3°C). January, known for its average high temperature of 26.1°F (-3.3°C) and an average low temperature of 13.5°F (-10.3°C), is the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is another freezing cold month in Savanna, Illinois, with an average temperature ranging between min 16.9°F (-8.4°C) and max 30.4°F (-0.9°C). At the onset of February, Savanna records an average high-temperature of a still freezing cold 30.4°F (-0.9°C), showing little deviation from the preceding month. Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Savanna, Illinois, with an average temperature varying between 44.6°F (7°C) and 29.8°F (-1.2°C). March comes with an increase, with the average high-temperature moving from a freezing cold 30.4°F (-0.9°C) in February to a chilly 44.6°F (7°C). Weather in March »

Weather in April

April is a moderate spring month in Savanna, Illinois, with an average temperature fluctuating between 40.6°F (4.8°C) and 56.7°F (13.7°C). The start of April brings a shift in the average high-temperature, increasing from March's frosty 44.6°F (7°C) to a mild 56.7°F (13.7°C). Weather in April »

Weather in May

The last month of the spring, May, is an agreeable month in Savanna, Illinois, with temperature in the range of an average high of 68.5°F (20.3°C) and an average low of 51.6°F (10.9°C). May witnesses an increase in the average high-temperature, moving from a refreshing 56.7°F (13.7°C) in April to a pleasant 68.5°F (20.3°C). Weather in May »

Weather in June

June, the first month of the summer in Savanna, is a moderately hot month, with an average temperature varying between 77.4°F (25.2°C) and 60.8°F (16°C). As June arrives, Savanna's weather shows a minor increase in high-temperatures, edging from May's pleasant 68.5°F (20.3°C) to a warm 77.4°F (25.2°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Savanna, Illinois, with an average temperature ranging between max 80.1°F (26.7°C) and min 63.5°F (17.5°C). With an average high-temperature of 80.1°F (26.7°C) and an average low-temperature of 63.5°F (17.5°C), July is the warmest month. Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Savanna, Illinois, with an average temperature fluctuating between 79.2°F (26.2°C) and 61.2°F (16.2°C). Savanna's average high-temperature in August sits at a still moderately hot 79.2°F (26.2°C), showing little difference from the previous month. Weather in August »

Weather in September

September, the first month of the autumn in Savanna, is also a moderately hot month, with an average temperature fluctuating between 73.4°F (23°C) and 54.5°F (12.5°C). The beginning of September brings a minor change in the average high-temperature, shifting from 79.2°F (26.2°C) in August to a still moderately hot 73.4°F (23°C). Weather in September »

Weather in October

October, like September, is another refreshing autumn month in Savanna, Illinois, with temperature in the range of an average high of 59.7°F (15.4°C) and an average low of 43.5°F (6.4°C). The commencement of October indicates a shift in the average high-temperature, receding from September's warm 73.4°F (23°C) to a moderate 59.7°F (15.4°C). Weather in October »

Weather in November

November, the last month of the autumn in Savanna, is also a frosty month, with an average temperature fluctuating between 31.6°F (-0.2°C) and 45.1°F (7.3°C). As October gives way to November, the average high-temperature displays a considerable decrease, falling from a refreshing 59.7°F (15.4°C) to a frosty 45.1°F (7.3°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Savanna, Illinois, with an average temperature fluctuating between 22.5°F (-5.3°C) and 32.7°F (0.4°C). In the transition to December, Savanna observes a drop in the average high-temperature, moving from a chilly 45.1°F (7.3°C) in November to an icy 32.7°F (0.4°C). Weather in December »
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Frequently asked questions

What is the coldest month in Savanna?

January, with its high-temperature average of 26.1°F (-3.3°C) and a low-temperature average of 13.5°F (-10.3°C), is the coldest month in Savanna.

What is the most humid month in Savanna?

With an average relative humidity of 86%, January is the most humid month in Savanna, Illinois.

How many days does it rain in Savanna?

Throughout the year, in Savanna, there are 149.3 rainfall days, and 29.76" (756mm) of precipitation is accumulated.

When does it snow in Savanna?

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

What is the snowiest month in Savanna?

The month with the most snowfall in Savanna is January, when snow falls for 11.7 days and typically aggregates up to 5.12" (130mm) of snow.

How much does it snow in Savanna?

Throughout the year, in Savanna, there are 41.2 snowfall days, and 16.73" (425mm) of snow is accumulated.

What is the month with the least sunshine in Savanna?

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

What is the month with the lowest UV index in Savanna?

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

What is the driest month in Savanna?

February is the month with the least rainfall in Savanna, Illinois. Rain falls for 4.4 days and accumulates 1.38" (35mm) of precipitation.

When is Daylight Saving Time (DST) in Savanna?

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

What is the rainiest month in Savanna?

May is the month with the most rainfall in Savanna. Rain falls for 18.5 days and accumulates 4.09" (104mm) of precipitation.

When it does not snow in Savanna?

June through September are months without snowfall in Savanna.

When are the longest days in Savanna?

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

What part of the year is the hottest in Savanna?

During the warmest month in Savanna, July, temperatures average a high of 80.1°F (26.7°C) and a low of 63.5°F (17.5°C).

What month has the most sunshine in Savanna?

The month with the most sunshine is July, with an average of 9.8h of sunshine.

When is the highest UV index in Savanna?

With an average maximum UV index of 6, July is the month with the highest UV index.

What is the least humid month in Savanna?

With an average relative humidity of 74%, October is the least humid month in Savanna.

What is the month with the shortest days in Savanna?

With an average of 9h and 12min of daylight, December has the shortest days of the year.

Average temperature
Savanna, IL

Average temperature - Savanna, IL

The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (26.1°F).

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).

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Average pressure
Savanna, IL

Average pressure - Savanna, IL

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed
Savanna, IL

Average wind speed - Savanna, IL

The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

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Average rainfall
Savanna, IL

Average rainfall - Savanna, IL

The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is February (1.38").

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Average rainfall days
Savanna, IL

Average rainfall days - Savanna, IL

The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is February (4.4 days).

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Average snowfall
Savanna, IL

Average snowfall - Savanna, IL

The month with the highest snowfall is January (5.12").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Savanna, IL

Average snowfall days - Savanna, IL

The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Savanna, IL

Average daylight / Average sunshine - Savanna, 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 month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days
Savanna, IL

Average sunshine days - Savanna, IL

The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (9.6 days).

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Average visibility
Savanna, IL

Average visibility - Savanna, IL

The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).

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Savanna, Illinois, USA

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