Illinois City, IL weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Illinois City now
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Illinois City weather by the hour
Illinois City weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Illinois City.
This week in Illinois City
Sunrise, sunset and moon in Illinois City
What is the weather usually like in Illinois City?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 84°F average high
- Januarycoldest month · 13°F average low
- 36.4 inprecipitation per year · 926 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Illinois City: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station ILLINOIS CITY DAM 16, IL US (USC00114355), adjusted for the elevation of Illinois City.
Illinois City weather month by month
Sunrise and sunset in Illinois City through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:25 AM | 5:00 PM | 9 h 34 min |
| February | 6:56 AM | 5:38 PM | 10 h 42 min |
| March | 7:13 AM | 7:11 PM | 11 h 58 min |
| April | 6:21 AM | 7:45 PM | 13 h 23 min |
| May | 5:42 AM | 8:17 PM | 14 h 34 min |
| June | 5:27 AM | 8:40 PM | 15 h 12 min |
| July | 5:41 AM | 8:37 PM | 14 h 55 min |
| August | 6:11 AM | 8:04 PM | 13 h 52 min |
| September | 6:42 AM | 7:14 PM | 12 h 31 min |
| October | 7:14 AM | 6:24 PM | 11 h 9 min |
| November | 6:50 AM | 4:45 PM | 9 h 54 min |
| December | 7:21 AM | 4:36 PM | 9 h 15 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Illinois City?
Illinois City has a hot-summer humid continental climate. The warmest month is July, with an average high of 84°F (29°C), and the coldest is January, with average lows of 13°F (-11°C).
It gets about 36.4 inches (926 mm) of precipitation a year. The wettest month is June and the driest is January.
The best time to visit Illinois City is June to September. At 764 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 Illinois City
Weather in towns near Illinois City
Questions about the weather in Illinois City
What is the hottest month in Illinois City?
July, with an average high of 84°F (29°C).
What is the coldest month in Illinois City?
January, with an average low of 13°F (-11°C).
How much does it rain in Illinois City?
About 36.4 inches (926 mm) a year; the wettest month is June.
Does it snow in Illinois City?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Illinois City?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Illinois City have?
Hot-summer humid continental (Köppen Dfa).
What is the weather like in Illinois City in November?
Highs average 48°F and lows 30°F, with about 2.1 inches of precipitation.
What time is sunrise in Illinois City?
Around 6:50 AM in mid-November, and sunset around 4:45 PM. Today’s exact times are shown above.
Where does this Illinois City weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Illinois City.
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