Nearby locations
DeKalb County, Illinois, United States
Elva, Illinois, United States
DeKalb, Illinois, United States
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McCormack Park, United States
Shipman Park, United States
Uncle Chuck's Airport, United States

Weather in DeKalb County, United States

77°
Clear
Feels like 77°
·
High89°Low65°
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Air quality

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0
36
500
Air quality:Good

Pollen index

Full Details
Tree
0/5
012345
Weed
0/5
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Grass
0/5
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Tomorrow's weather summary

The weather in DeKalb County on Wednesday, September 9th, is going to be clear throughout the day.

Additionally, there will be few clouds around noon, around 12 pm.

Weather information for DeKalb County, on Wednesday, September 9th:

The highest temperature of the day will be 98°F around 3 pm. The day will have comfortable humidity, with average humidity of 55%, ranging from 34% to a maximum value of 76% at about 7 am. The wind will be breezy, and will get up to 11 mph at 10 pm, blowing from the south. The cloud coverage will range from 0% around midnight to as high as 14% around 4 pm with an average of 3%.

The precipitation probability will change throughout the day between 0% and 5%. The highest chance for precipitation will be around 5 pm and the lowest probability around midnight. The dew point will range from 63°F up to a maximum value of 71°F around 11 am.

The visibility is expected to be good with average visibility of 10 mi throughout the day. Atmospheric pressure will be normal with average pressure of 1017 hPa. Sunrise will be at 6:35 am, and sunset at 7:16 pm, making it a total of 12 hours and 41 minutes of daylight.

Air quality forecast for DeKalb County, on Wednesday, September 9th:

On average, the air quality on this day will be good, meaning that air quality is satisfactory, and air pollution poses little or no risk. According to our index, ranging from 0 to 500, the air quality is going to be between values of 31 and 58.

Pollen forecast for DeKalb County, on Wednesday, September 9th:

The overall pollen forecast for this day shows no significant pollen. Tree pollen on this day is expected to have no risk. There's no risk of weed pollen, and as for grass pollen, this day is expected to have no risk.

The weather in DeKalb County on Thursday, September 10th, will be cloudy throughout the day, with light rain around noon.

There's seems to be also high probability of clear skies before dawn at about 12 am.

Weather information for DeKalb County, on Thursday, September 10th:

The maximum temperature during the day will be 85°F around midnight. The day will be extremely humid, with average humidity of 72%, ranging from 56% to a maximum value of 83% at about 5 pm. The wind will be breezy, and will get up to 11 mph at 5 pm, blowing from the north-west. The cloud coverage will range from 1% around midnight to as high as 100% around 5 pm with an average of 68%.

The chances of precipitation throughout the day will change between 0% and 30%. The highest chance for precipitation will be around 2 pm and the lowest probability around midnight. The dew point will range from 67°F up to a maximum value of 73°F around 2 pm.

The visibility is expected to be good with average visibility of 8 mi throughout the day. Atmospheric pressure will be normal with average pressure of 1014 hPa. Sunrise will be at 6:36 am, and sunset at 7:14 pm. The day will have 12 hours and 38 minutes of daylight.

Air quality forecast for DeKalb County, on Thursday, September 10th:

On average, the air quality on this day will be good, meaning that air quality is satisfactory, and air pollution poses little or no risk. According to our index, ranging from 0 to 500, the air quality is going to be between values of 39 and 48.

Pollen forecast for DeKalb County, on Thursday, September 10th:

The overall pollen forecast for this day shows no significant pollen. Tree pollen on this day is expected to have no risk. There's no risk of weed pollen, and as for grass pollen, this day is expected to have no risk.

FAQ

How warm does it get in DeKalb County?
The average annual highest temperature in DeKalb County is 29.7°C (85.5°F), and the July 18th is the hottest day on average.
How cold does it get in DeKalb County?
The average annual lowest temperature in DeKalb County is -12.0°C (10.4°F), and the January 14th is the coldest day on average.
Which month has the most rain in DeKalb County?
The wettest months in DeKalb County are May and June.
What months does it snow in DeKalb County?
The most common time of year for snow is February, January, December and March.