Williamson, IL weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Williamson now
Loading the National Weather Service forecast…
Williamson weather by the hour
Williamson weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Williamson.
This week in Williamson
Sunrise, sunset and moon in Williamson
What is the weather usually like in Williamson?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 89°F average high
- Januarycoldest month · 21°F average low
- 42.1 inprecipitation per year · 1,069 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Williamson: May and August to October, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station HILLSBORO, IL US (USC00114108), adjusted for the elevation of Williamson.
Williamson weather month by month
Sunrise and sunset in Williamson through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:14 AM | 5:02 PM | 9 h 47 min |
| February | 6:48 AM | 5:37 PM | 10 h 49 min |
| March | 7:08 AM | 7:07 PM | 11 h 58 min |
| April | 6:20 AM | 7:37 PM | 13 h 17 min |
| May | 5:44 AM | 8:06 PM | 14 h 21 min |
| June | 5:31 AM | 8:27 PM | 14 h 56 min |
| July | 5:44 AM | 8:25 PM | 14 h 41 min |
| August | 6:11 AM | 7:55 PM | 13 h 44 min |
| September | 6:39 AM | 7:08 PM | 12 h 29 min |
| October | 7:07 AM | 6:22 PM | 11 h 14 min |
| November | 6:40 AM | 4:46 PM | 10 h 5 min |
| December | 7:09 AM | 4:39 PM | 9 h 30 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Williamson?
Williamson has a hot-summer humid continental climate. The warmest month is July, with an average high of 89°F (32°C), and the coldest is January, with average lows of 21°F (-6°C).
It gets about 42.1 inches (1,069 mm) of precipitation a year. The wettest month is May and the driest is January.
The best time to visit Williamson is May and August to October. 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 Williamson
Weather in towns near Williamson
Questions about the weather in Williamson
What is the hottest month in Williamson?
July, with an average high of 89°F (32°C).
What is the coldest month in Williamson?
January, with an average low of 21°F (-6°C).
How much does it rain in Williamson?
About 42.1 inches (1,069 mm) a year; the wettest month is May.
Does it snow in Williamson?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Williamson?
May and August to October, when temperatures are most pleasant and rainy days are fewer.
What climate does Williamson have?
Hot-summer humid continental (Köppen Dfa).
What is the weather like in Williamson in November?
Highs average 55°F and lows 35°F, with about 3.8 inches of precipitation.
What time is sunrise in Williamson?
Around 6:40 AM in mid-November, and sunset around 4:46 PM. Today’s exact times are shown above.
Where does this Williamson weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Williamson.
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