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DeKalb, Illinois, United States
DeKalb County, Illinois, United States
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Weather in DeKalb, United States

71°
Cloudy
Feels like 71°
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High79°Low59°
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Air quality

Full Details
0
151
500
Air quality:Unhealthy

Pollen index

Full Details
Tree
0/5
012345
Weed
0/5
012345
Grass
0/5
012345

Today's weather summary

The weather in DeKalb on Monday, July 20th, will be clear for most of the day, together with cloud overcast in the early morning.

There's seems to be also high probability of some clouds in the early morning around 6 am, and also light rain around noon around 12 pm.

Weather information for DeKalb, on Monday, July 20th:

The highest temperature of the day will be 83°F at about 6 pm. The day will have very high relative humidity, with average humidity of 78%, ranging from 58% to a maximum value of 95% at about 6 am. The wind will be breezy, and will get up to 14 mph at 11 pm, blowing from the south-west. The cloud coverage will range from 0% around 5 pm to as high as 100% around 10 pm with an average of 47%.

The chances of precipitation throughout the day will change between 0% and 96%. The highest chance for precipitation will be around noon and the lowest probability around midnight. The dew point will range from 56°F up to a maximum value of 71°F around 10 pm.

The visibility is expected to be good with average visibility of 7 mi throughout the day. Atmospheric pressure will be normal with average pressure of 1011 hPa. Sunrise will be at 5:37 am, and sunset at 8:25 pm, making it a total of 14 hours and 48 minutes of daylight.

Air quality forecast for DeKalb, on Monday, July 20th:

On average, the air quality on this day will be unhealthy for sensitive groups, meaning that members of sensitive groups may experience health effects. The general public is less likely to be affected. According to our index, ranging from 0 to 500, the air quality is going to be between values of 46 and 187.

Pollen forecast for DeKalb, on Monday, July 20th:

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 on Tuesday, July 21st, is going to be clear for most of the day, together with cloud overcast before dawn.

There is also a chance for some clouds before dawn at about 4 am.

Weather information for DeKalb, on Tuesday, July 21st:

The maximum temperature during the day will be 79°F at about 4 pm. The day will be extremely humid, with average humidity of 75%, ranging from 53% to a maximum value of 96% at about 1 am. The wind will be breezy, and will get up to 17 mph at 2 pm, blowing from the north-west. The cloud coverage will range from 0% around 7 am to as high as 100% around 2 pm with an average of 40%.

The chances of precipitation throughout the day will change between 0% and 40%. The highest chance for precipitation will be around midnight and the lowest probability around 1 am. The dew point will range from 58°F up to a maximum value of 71°F around 4 am.

The visibility is expected to be good with average visibility of 9 mi throughout the day. Atmospheric pressure will be low with average pressure of 1007 hPa. Sunrise will be at 5:37 am, and sunset at 8:24 pm. The day will have 14 hours and 47 minutes of daylight.

Air quality forecast for DeKalb, on Tuesday, July 21st:

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 25 and 44.

Pollen forecast for DeKalb, on Tuesday, July 21st:

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