DeKalb, IL weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in DeKalb now
Loading the National Weather Service forecast…
DeKalb weather by the hour
DeKalb weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of DeKalb.
This week in DeKalb
Sunrise, sunset and moon in DeKalb
What is the weather usually like in DeKalb?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 83°F average high
- Januarycoldest month · 13°F average low
- 37.2 inprecipitation per year · 946 mm
- 33.1 insnowfall per year · 84 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit DeKalb: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station DE KALB, IL US (USC00112223), adjusted for the elevation of DeKalb.
DeKalb weather month by month
Sunrise and sunset in DeKalb through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:18 AM | 4:50 PM | 9 h 31 min |
| February | 6:48 AM | 5:29 PM | 10 h 40 min |
| March | 7:04 AM | 7:02 PM | 11 h 58 min |
| April | 6:12 AM | 7:37 PM | 13 h 24 min |
| May | 5:32 AM | 8:09 PM | 14 h 37 min |
| June | 5:17 AM | 8:33 PM | 15 h 16 min |
| July | 5:31 AM | 8:30 PM | 14 h 58 min |
| August | 6:01 AM | 7:56 PM | 13 h 55 min |
| September | 6:34 AM | 7:06 PM | 12 h 32 min |
| October | 7:06 AM | 6:15 PM | 11 h 8 min |
| November | 6:43 AM | 4:35 PM | 9 h 52 min |
| December | 7:14 AM | 4:26 PM | 9 h 11 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in DeKalb?
DeKalb has a hot-summer humid continental climate. The warmest month is July, with an average high of 83°F (28°C), and the coldest is January, with average lows of 13°F (-11°C).
It gets about 37.2 inches (946 mm) of precipitation a year. The wettest month is May and the driest is January. Snow is common: about 33 inches fall in an average year.
The best time to visit DeKalb is June to September. At 879 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about DeKalb
Weather in towns near DeKalb
Questions about the weather in DeKalb
What is the hottest month in DeKalb?
July, with an average high of 83°F (28°C).
What is the coldest month in DeKalb?
January, with an average low of 13°F (-11°C).
How much does it rain in DeKalb?
About 37.2 inches (946 mm) a year; the wettest month is May.
Does it snow in DeKalb?
Yes, about 33 inches of snow fall in an average year.
When is the best time to visit DeKalb?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does DeKalb have?
Hot-summer humid continental (Köppen Dfa).
What is the weather like in DeKalb in November?
Highs average 46°F and lows 30°F, with about 2.3 inches of precipitation.
What time is sunrise in DeKalb?
Around 6:43 AM in mid-November, and sunset around 4:35 PM. Today’s exact times are shown above.
Where does this DeKalb weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of DeKalb.
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