Sullivan, IL weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Sullivan now
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Sullivan weather by the hour
Sullivan weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Sullivan.
This week in Sullivan
Sunrise, sunset and moon in Sullivan
What is the weather usually like in Sullivan?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 86°F average high
- Januarycoldest month · 18°F average low
- 41.6 inprecipitation per year · 1,057 mm
- 12.9 insnowfall per year · 33 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Sullivan: May and July to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station SULLIVAN 3S, IL US (USC00118389), adjusted for the elevation of Sullivan.
Sullivan weather month by month
Sunrise and sunset in Sullivan through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:11 AM | 4:56 PM | 9 h 44 min |
| February | 6:44 AM | 5:32 PM | 10 h 47 min |
| March | 7:03 AM | 7:02 PM | 11 h 58 min |
| April | 6:15 AM | 7:33 PM | 13 h 18 min |
| May | 5:38 AM | 8:03 PM | 14 h 24 min |
| June | 5:24 AM | 8:25 PM | 15 h 0 min |
| July | 5:38 AM | 8:22 PM | 14 h 44 min |
| August | 6:05 AM | 7:52 PM | 13 h 46 min |
| September | 6:34 AM | 7:04 PM | 12 h 30 min |
| October | 7:03 AM | 6:16 PM | 11 h 13 min |
| November | 6:37 AM | 4:40 PM | 10 h 3 min |
| December | 7:06 AM | 4:32 PM | 9 h 26 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Sullivan?
Sullivan has a hot-summer humid continental climate. The warmest month is July, with an average high of 86°F (30°C), and the coldest is January, with average lows of 18°F (-8°C).
It gets about 41.6 inches (1,057 mm) of precipitation a year. The wettest month is May and the driest is February. Snow is common: about 13 inches fall in an average year.
The best time to visit Sullivan is May and July to September. At 673 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 Sullivan
Weather in towns near Sullivan
Questions about the weather in Sullivan
What is the hottest month in Sullivan?
July, with an average high of 86°F (30°C).
What is the coldest month in Sullivan?
January, with an average low of 18°F (-8°C).
How much does it rain in Sullivan?
About 41.6 inches (1,057 mm) a year; the wettest month is May.
Does it snow in Sullivan?
Yes, about 13 inches of snow fall in an average year.
When is the best time to visit Sullivan?
May and July to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Sullivan have?
Hot-summer humid continental (Köppen Dfa).
What is the weather like in Sullivan in November?
Highs average 52°F and lows 33°F, with about 3.4 inches of precipitation.
What time is sunrise in Sullivan?
Around 6:37 AM in mid-November, and sunset around 4:40 PM. Today’s exact times are shown above.
Where does this Sullivan weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Sullivan.
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