Climate and monthly weather forecast
Rockford, IL

The clear cityscape of the city of Rockford in Illinois
The clear cityscape of the city of Rockford in Illinois

Weather in January

January, like December, is a freezing cold winter month in Rockford, Illinois, with an average temperature varying between 13.8°F (-10.1°C) and 26.2°F (-3.2°C). The coldest month is January, with an average high-temperature of 26.2°F (-3.2°C) and an average low-temperature of 13.8°F (-10.1°C). Weather in January »

Weather in February

February, the last month of the winter in Rockford, is another freezing cold month, with an average temperature varying between 30.2°F (-1°C) and 17.1°F (-8.3°C). In Rockford, the average high-temperature in February is essentially the same as in January - a still subzero cold 30.2°F (-1°C). Weather in February »

Weather in March

March, the first month of the spring in Rockford, is a chilly month, with an average temperature ranging between min 29.3°F (-1.5°C) and max 44.2°F (6.8°C). In March, the average high-temperature rises from a subzero cold 30.2°F (-1°C) in February to a frosty 44.2°F (6.8°C). Weather in March »

Weather in April

April is a moderate spring month in Rockford, Illinois, with an average temperature varying between 39.7°F (4.3°C) and 55.9°F (13.3°C). In Rockford, the average high-temperature in April increases from a chilly 44.2°F (6.8°C) in March to a mild 55.9°F (13.3°C). Weather in April »

Weather in May

May, the last month of the spring in Rockford, is an agreeable month, with an average temperature varying between 50.9°F (10.5°C) and 68.5°F (20.3°C). In Rockford, the average high-temperature in May increases from a moderate 55.9°F (13.3°C) in April to an agreeable 68.5°F (20.3°C). Weather in May »

Weather in June

June, the first month of the summer in Rockford, is a warm month, with temperature in the range of an average high of 77.2°F (25.1°C) and an average low of 59.7°F (15.4°C). In June, the average high-temperature marginally rises from an agreeable 68.5°F (20.3°C) in May to a moderately hot 77.2°F (25.1°C). Weather in June »

Weather in July

July, like June, in Rockford, Illinois, is a moderately hot summer month, with an average temperature fluctuating between 79.9°F (26.6°C) and 63°F (17.2°C). With an average high-temperature of 79.9°F (26.6°C) and an average low-temperature of 63°F (17.2°C), July is the warmest month. Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Rockford, Illinois, with temperature in the range of an average low of 60.6°F (15.9°C) and an average high of 78.1°F (25.6°C). In August, the average high-temperature is relatively the same as in July - a still warm 78.1°F (25.6°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in Rockford, Illinois, with temperature in the range of an average high of 72.7°F (22.6°C) and an average low of 54.1°F (12.3°C). In Rockford, the average high-temperature in September marginally drops from a warm 78.1°F (25.6°C) in August to a pleasant 72.7°F (22.6°C). Weather in September »

Weather in October

October, the same as September, in Rockford, Illinois, is a moderate autumn month, with an average temperature ranging between min 43.5°F (6.4°C) and max 59.4°F (15.2°C). In October, the average high-temperature decreases from an agreeable 72.7°F (22.6°C) in September to a moderate 59.4°F (15.2°C). Weather in October »

Weather in November

November, the last month of the autumn in Rockford, is another chilly month, with an average temperature ranging between max 44.8°F (7.1°C) and min 31.8°F (-0.1°C). In November, the average high-temperature declines considerably from a mild 59.4°F (15.2°C) in October to a frosty 44.8°F (7.1°C). Weather in November »

Weather in December

December, the first month of the winter in Rockford, is also a wintry month, with an average temperature ranging between min 22.5°F (-5.3°C) and max 32.4°F (0.2°C). In Rockford, the average high-temperature in December drops from a chilly 44.8°F (7.1°C) in November to a cold 32.4°F (0.2°C). Weather in December »
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FAQ

What is the coldest month in Rockford?

With an average high-temperature of 26.2°F (-3.2°C) and an average low-temperature of 13.8°F (-10.1°C), January is the coldest month.

What is the most humid month in Rockford?

The most humid month is January, with an average relative humidity of 86%.

How many days does it rain in Rockford?

In Rockford, Illinois, during the entire year, the rain falls for 148.1 days and collects up to 28.39" (721mm) of precipitation.

When does it snow in Rockford?

January through April, October through December are months with snowfall in Rockford.

What is the snowiest month in Rockford?

January is the month with the most snowfall. Snow falls for 13 days and accumulates 4.88" (124mm) of snow.

How many days does it snow in Rockford?

Throughout the year, there are 45.9 snowfall days, and 15.67" (398mm) of snow is accumulated.

What is the month with the least sunshine in Rockford?

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

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

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

What is the driest month in Rockford?

The month with the least rainfall is February, when the rain falls for 4.3 days and typically collects 1.26" (32mm) of precipitation.

When is Daylight Saving Time (DST) in Rockford?

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.

What are the least humid months in Rockford?

The months with the lowest humidity are April and October, with an average relative humidity of 75%.

When it does not snow in Rockford?

May through September are months without snowfall in Rockford.

What is the month with the highest UV index in Rockford?

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

What is the wettest month in Rockford?

The month with the most rainfall is June, when the rain falls for 18.1 days and typically aggregates up to 4.02" (102mm) of precipitation.

When are the longest days in Rockford?

With an average of 15h and 13min of daylight, June has the longest days of the year in Rockford.

What is the warmest month in Rockford?

With an average high-temperature of 79.9°F (26.6°C) and an average low-temperature of 63°F (17.2°C), July is the warmest month.

What month has the most sunshine in Rockford?

The month with the most sunshine is July, with an average of 9.7h of sunshine.

What is the month with the shortest days in Rockford?

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

Average temperature
Rockford, IL

Average temperature - Rockford, IL

The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (26.2°F).

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).

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Average pressure
Rockford, IL

Average pressure - Rockford, IL

The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed
Rockford, IL

Average wind speed - Rockford, IL

The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

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Average humidity
Rockford, IL

Average humidity - Rockford, IL

The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April and October (75%).

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Average rainfall
Rockford, IL

Average rainfall - Rockford, IL

The wettest month (with the highest rainfall) is June (4.02").
The driest month (with the least rainfall) is February (1.26").

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Average rainfall days
Rockford, IL

Average rainfall days - Rockford, IL

The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (4.3 days).

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Average snowfall
Rockford, IL

Average snowfall - Rockford, IL

The month with the highest snowfall is January (4.88").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Rockford, IL

Average snowfall days - Rockford, IL

The month with the highest number of snowfall days is January (13 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
Rockford, IL

Average daylight / Average sunshine - Rockford, 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 month with the most sunshine is July (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
Rockford, IL

Average sunshine days - Rockford, IL

The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (9.8 days).

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Average UV index
Rockford, IL

Average UV index - Rockford, 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, November and December (UV index 1).

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Average visibility
Rockford, IL

Average visibility - Rockford, IL

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

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