Climate and monthly weather forecast
Freeport, IL

Weather in January

January, the same as December, in Freeport, Illinois, is another subzero cold winter month, with an average temperature ranging between min 13.1°F (-10.5°C) and max 25.2°F (-3.8°C). January is the coldest month, with an average high-temperature of 25.2°F (-3.8°C) and an average low-temperature of 13.1°F (-10.5°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Freeport, Illinois, with an average temperature ranging between min 16.7°F (-8.5°C) and max 29.5°F (-1.4°C). In February, the average high-temperature is almost the same as in January - a still freezing cold 29.5°F (-1.4°C). Weather in February »

Weather in March

March, the first month of the spring in Freeport, is a frosty month, with an average temperature varying between 43.9°F (6.6°C) and 28.9°F (-1.7°C). In Freeport, the average high-temperature in March soars, from a freezing cold 29.5°F (-1.4°C) in February, to a chilly 43.9°F (6.6°C). Weather in March »

Weather in April

April in Freeport, Illinois, is a moderate spring month, with temperature in the range of an average low of 39.2°F (4°C) and an average high of 55.9°F (13.3°C). In April, the average high-temperature rises from a chilly 43.9°F (6.6°C) in March to a mild 55.9°F (13.3°C). Weather in April »

Weather in May

The last month of the spring, May, is a pleasant month in Freeport, Illinois, with an average temperature fluctuating between 68°F (20°C) and 50.9°F (10.5°C). In Freeport, the average high-temperature in May rises from a moderate 55.9°F (13.3°C) in April to a pleasant 68°F (20°C). Weather in May »

Weather in June

June, the first month of the summer in Freeport, is a moderately hot month, with temperature in the range of an average high of 76.6°F (24.8°C) and an average low of 59.5°F (15.3°C). In June, the average high-temperature marginally rises from an agreeable 68°F (20°C) in May to a warm 76.6°F (24.8°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Freeport, Illinois, with temperature in the range of an average high of 79.7°F (26.5°C) and an average low of 62.8°F (17.1°C). The warmest month is July, with an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 62.8°F (17.1°C). Weather in July »

Weather in August

August, the last month of the summer in Freeport, is another warm month, with temperature in the range of an average low of 60.8°F (16°C) and an average high of 78.3°F (25.7°C). In August, the average high-temperature is relatively the same as in July - a still warm 78.3°F (25.7°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in Freeport, Illinois, with temperature in the range of an average low of 54°F (12.2°C) and an average high of 72.7°F (22.6°C). In Freeport, the average high-temperature in September marginally drops from a moderately hot 78.3°F (25.7°C) in August to a pleasant 72.7°F (22.6°C). Weather in September »

Weather in October

October, like September, is a moderate autumn month in Freeport, Illinois, with an average temperature ranging between max 58.8°F (14.9°C) and min 43°F (6.1°C). In October, the average high-temperature drops from an agreeable 72.7°F (22.6°C) in September to a moderate 58.8°F (14.9°C). Weather in October »

Weather in November

November, the last month of the autumn in Freeport, is also a frosty month, with temperature in the range of an average high of 43.9°F (6.6°C) and an average low of 30.9°F (-0.6°C). In November, the average high-temperature declines considerably from a moderate 58.8°F (14.9°C) in October to a chilly 43.9°F (6.6°C). Weather in November »

Weather in December

December, the first month of the winter in Freeport, is still a cold month, with an average temperature fluctuating between 21.6°F (-5.8°C) and 32°F (0°C). In Freeport, the average high-temperature in December decreases from a frosty 43.9°F (6.6°C) in November to a cold 32°F (0°C). Weather in December »
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FAQ

What is the coldest month in Freeport?

The coldest month in Freeport is January, with an average high-temperature of 25.2°F (-3.8°C) and an average low-temperature of 13.1°F (-10.5°C).

What is the most humid month in Freeport?

With an average relative humidity of 87%, January is the most humid month in Freeport, Illinois.

How much does it rain in Freeport?

Throughout the year, in Freeport, there are 138 rainfall days, and 19.69" (500mm) of precipitation is accumulated.

When does it snow in Freeport?

Months with snowfall in Freeport, Illinois, are January through April, October through December.

When does it snow the most in Freeport?

January is the month with the most snowfall in Freeport, Illinois. Snow falls for 11.3 days and accumulates 2.99" (76mm) of snow.

How much does it snow in Freeport?

Throughout the year, in Freeport, Illinois, there are 41.8 snowfall days, and 10.43" (265mm) of snow is accumulated.

What is the month with the least sunshine in Freeport?

With an average of 3.6h of sunshine, January has the least sunshine of the year in Freeport, Illinois.

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

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

When is Daylight Saving Time (DST) in Freeport?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

When it does not snow in Freeport?

May through September are months without snowfall in Freeport, Illinois.

When is the highest UV index in Freeport?

May through August, with an average maximum UV index of 5, are months with the highest UV index in Freeport, Illinois.

What is the rainiest month in Freeport?

June is the month with the most rainfall in Freeport, Illinois. Rain falls for 16.8 days and accumulates 2.87" (73mm) of precipitation.

When are the longest days in Freeport?

June has the longest days of the year in Freeport, Illinois, with an average of 15h and 13min of daylight.

What is the warmest month in Freeport?

With an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 62.8°F (17.1°C), July is the warmest month in Freeport.

What is the month with the most sunshine in Freeport?

July and August, with an average of 9.7h of sunshine, are months with the most sunshine.

What is the least humid month in Freeport?

October is the least humid month in Freeport, with an average relative humidity of 75%.

What is the driest month in Freeport?

December is the month with the least rainfall. Rain falls for 6.8 days and accumulates 0.83" (21mm) of precipitation.

What is the month with the shortest days in Freeport?

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

Average temperature
Freeport, IL

Average temperature - Freeport, IL

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (25.2°F).

The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).

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Average pressure
Freeport, IL

Average pressure - Freeport, 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
Freeport, IL

Average wind speed - Freeport, IL

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

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Average rainfall
Freeport, IL

Average rainfall - Freeport, IL

The wettest month (with the highest rainfall) is June (2.87").
The driest month (with the least rainfall) is December (0.83").

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Average rainfall days
Freeport, IL

Average rainfall days - Freeport, IL

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (4.9 days).

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Average snowfall
Freeport, IL

Average snowfall - Freeport, IL

The month with the highest snowfall is January (2.99").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Freeport, IL

Average snowfall days - Freeport, IL

The month with the highest number of snowfall days is January (11.3 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
Freeport, IL

Average daylight / Average sunshine - Freeport, IL

The month with the longest days is June (Average daylight: 15h and 13min).
The month with the shortest days is December (Average daylight: 9h and 9min).

The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

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Average sunshine days
Freeport, IL

Average sunshine days - Freeport, IL

The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is June (10.5 days).

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Average UV index
Freeport, IL

Average UV index - Freeport, IL

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).

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Average visibility
Freeport, IL

Average visibility - Freeport, IL

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

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