Climate and monthly weather forecast
Grantsburg, IL

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Weather in January

January, the same as December, is another cold winter month in Grantsburg, Illinois, with an average temperature fluctuating between 40.1°F (4.5°C) and 27°F (-2.8°C). January brings the lowest temperatures, with an average high of 40.1°F (4.5°C) and an average low of 27°F (-2.8°C). Weather in January »

Weather in February

February, the last month of the winter in Grantsburg, is a chilly month, with an average temperature ranging between min 30.7°F (-0.7°C) and max 45.1°F (7.3°C). Grantsburg marks the arrival of February with an average high-temperature of a chilly 45.1°F (7.3°C), hardly different from January's 40.1°F (4.5°C). Weather in February »

Weather in March

The first month of the spring, March, is a mild month in Grantsburg, Illinois, with temperature in the range of an average high of 55.8°F (13.2°C) and an average low of 39.7°F (4.3°C). As February transitions into March, a change in temperatures is observed, with average highs moving from a frosty 45.1°F (7.3°C) to a moderate 55.8°F (13.2°C). Weather in March »

Weather in April

April in Grantsburg, Illinois, is an enjoyable spring month, with an average temperature fluctuating between 48.9°F (9.4°C) and 66.6°F (19.2°C). The commencement of April sees a shift in the average high-temperature, moving from a moderate 55.8°F (13.2°C) in March to an enjoyable 66.6°F (19.2°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderately hot month in Grantsburg, Illinois, with an average temperature ranging between max 75.7°F (24.3°C) and min 57.9°F (14.4°C). Grantsburg's weather in May presents a rise in the average high-temperature, moving from a comfortable 66.6°F (19.2°C) in April to a warm 75.7°F (24.3°C). Weather in May »

Weather in June

June, the first month of the summer in Grantsburg, is still a warm month, with an average temperature ranging between min 66.2°F (19°C) and max 85.6°F (29.8°C). With the onset of June, Grantsburg's average high-temperature experiences a rise, moving from May's moderately hot 75.7°F (24.3°C) to a still warm 85.6°F (29.8°C). Weather in June »

Weather in July

July is a tropical summer month in Grantsburg, Illinois, with an average temperature varying between 88°F (31.1°C) and 68.5°F (20.3°C). With average high and low temperatures of 88°F (31.1°C) and 68.5°F (20.3°C) respectively, July is Grantsburg's warmest month. July's mean heat index is computed to be a blistering 104°F (40°C). Weather in July »

Weather in August

August, the last month of the summer in Grantsburg, is another hot month, with temperature in the range of an average high of 86.5°F (30.3°C) and an average low of 66.7°F (19.3°C). Grantsburg's August reports an average high-temperature of a still hot 86.5°F (30.3°C), exhibiting a minor difference from July. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Grantsburg, Illinois, with an average temperature fluctuating between 81.1°F (27.3°C) and 60.6°F (15.9°C). September's arrival aligns with a minor decrease in average high-temperatures, from August's hot 86.5°F (30.3°C) to a warm 81.1°F (27.3°C). Weather in September »

Weather in October

October, like September, in Grantsburg, Illinois, is another enjoyable autumn month, with an average temperature ranging between max 67.8°F (19.9°C) and min 49.6°F (9.8°C). October comes with a drop in the average high-temperature, falling from September's warm 81.1°F (27.3°C) to an enjoyable 67.8°F (19.9°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Grantsburg, Illinois, with an average temperature ranging between max 54.5°F (12.5°C) and min 38.8°F (3.8°C). During the transition into November, Grantsburg observes a decrease in the average high-temperature, falling from an enjoyable 67.8°F (19.9°C) in October to a cool 54.5°F (12.5°C). Weather in November »

Weather in December

The first month of the winter, December, is also a frosty month in Grantsburg, Illinois, with an average temperature varying between 32.7°F (0.4°C) and 44.8°F (7.1°C). December is characterized by a reduction in the average high-temperature, from a fresh 54.5°F (12.5°C) in November to a chilly 44.8°F (7.1°C). Weather in December »
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Frequently asked questions

What are the coldest months in Grantsburg?

With average temperatures fluctuating between a high of 40.1°F (4.5°C) and a low of 27°F (-2.8°C), January stands out as the coldest month.

How many days does it rain in Grantsburg?

In Grantsburg, Illinois, during the entire year, the rain falls for 118.3 days and collects up to 13.03" (331mm) of precipitation.

When does it snow in Grantsburg?

Months with snowfall in Grantsburg, Illinois, are January through March, November and December.

How many days does it snow in Grantsburg?

In Grantsburg, during the entire year, snow falls for 11 days and aggregates up to 1.57" (40mm) of snow.

What is the month with the least sunshine in Grantsburg?

January and February, with an average of 4.6h of sunshine, are months with the least sunshine in Grantsburg, Illinois.

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

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Grantsburg.

What is the snowiest month in Grantsburg?

The month with the most snowfall is February, when snow falls for 3.2 days and typically aggregates up to 0.67" (17mm) of snow.

What is the most humid month in Grantsburg?

The months with the highest humidity in Grantsburg, Illinois, are March and May, with an average relative humidity of 79%.

When is Daylight Saving Time (DST) in Grantsburg?

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 Grantsburg?

In Grantsburg, snow does not fall in April through October.

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

May through August, with an average maximum UV index of 6, are months with the highest UV index in Grantsburg, Illinois.

What is the wettest month in Grantsburg?

June is the month with the most rainfall in Grantsburg. Rain falls for 12.5 days and accumulates 1.5" (38mm) of precipitation.

When are the longest days in Grantsburg?

June has the longest days of the year, with an average of 14h and 42min of daylight.

What is the month with the most sunshine in Grantsburg?

The months with the most sunshine in Grantsburg are June and July, with an average of 10.4h of sunshine.

What is the warmest month in Grantsburg?

July, marked by an average high-temperature of 88°F (31.1°C) and a low-temperature of 68.5°F (20.3°C), is the warmest month in Grantsburg.

What is the driest month in Grantsburg?

The month with the least rainfall in Grantsburg is September, when the rain falls for 8.3 days and typically collects 0.47" (12mm) of precipitation.

What is the least humid month in Grantsburg?

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

What is the month with the shortest days in Grantsburg?

December has the shortest days of the year in Grantsburg, Illinois, with an average of 9h and 36min of daylight.

Average temperature
Grantsburg, IL

Average temperature - Grantsburg, IL

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.1°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 (27°F).

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Average pressure
Grantsburg, IL

Average pressure - Grantsburg, IL

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed
Grantsburg, IL

Average wind speed - Grantsburg, IL

The windiest months (with the highest average wind speed) are January and February (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

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Average humidity
Grantsburg, IL

Average humidity - Grantsburg, IL

The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (71%).

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Average rainfall
Grantsburg, IL

Average rainfall - Grantsburg, IL

The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is September (0.47").

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Average rainfall days
Grantsburg, IL

Average rainfall days - Grantsburg, IL

The month with the highest number of rainy days is July (13.1 days).
The months with the least rainy days are January, February and December (7.3 days).

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Average snowfall
Grantsburg, IL

Average snowfall - Grantsburg, IL

The month with the highest snowfall is February (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days
Grantsburg, IL

Average snowfall days - Grantsburg, IL

The month with the highest number of snowfall days is January (3.3 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
Grantsburg, IL

Average daylight / Average sunshine - Grantsburg, IL

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).

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Average sunshine days
Grantsburg, IL

Average sunshine days - Grantsburg, IL

The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is June (14.8 days).

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Average UV index
Grantsburg, IL

Average UV index - Grantsburg, 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 and December (UV index 2).

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Average visibility
Grantsburg, IL

Average visibility - Grantsburg, 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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Grantsburg, Illinois, USA

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