Weather Alert
Williamson County Weather Warning NWS WEATHER ALERT FOR THE WILLIAMSON COUNTY, IL AREA - Issued: 156 PM CST Mon Mar 2 2026 Williamson County Weather Warning

World > North America > United States > Illinois > Williamson County  

Williamson County, IL Weather - Hour by Hour Forecast

Feedback E-mail the Weather

Quick Clicks

Williamson County, IL Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Fog And Mist. Temperature is 40°F4°C, dew point 38°F3°C, humidity 96%. Wind direction is ENE at 5 mph8 km/h with visibility of 2.50 mi4 km. Barometric pressure is 30 in1016 mb.
Tonight - Cloudy. Patchy fog. Showers likely with a slight chance of thunderstorms after midnight. Near steady temperature around 40. East w.. Full Forecast
Tuesday - Partly sunny. Showers likely, mainly in the morning. Not as cool with highs in the upper 60s. South winds 5 to 10 mph. Chance of r.. Full Forecast

Williamson County Hourly Weather

24 Hour Forecast Scroll
Tue, Mar 03
Midnight
Tue, Mar 03
1:00 am
Tue, Mar 03
2:00 am
Tue, Mar 03
3:00 am
Tue, Mar 03
4:00 am
Tue, Mar 03
5:00 am
Tue, Mar 03
6:00 am
Tue, Mar 03
7:00 am
Tue, Mar 03
8:00 am
Tue, Mar 03
9:00 am
Tue, Mar 03
10:00 am
Tue, Mar 03
11:00 am
Tue, Mar 03
Noon
Tue, Mar 03
1:00 pm
Tue, Mar 03
2:00 pm
Tue, Mar 03
3:00 pm
Tue, Mar 03
4:00 pm
Tue, Mar 03
5:00 pm
Tue, Mar 03
6:00 pm
Tue, Mar 03
7:00 pm
Tue, Mar 03
8:00 pm
Tue, Mar 03
9:00 pm
Tue, Mar 03
10:00 pm
Tue, Mar 03
11:00 pm
Williamson County, IL Hourly Weather - Cloudy - 12:00 AM Williamson County, IL Hourly Weather - Cloudy - 1:00 AM Williamson County, IL Hourly Weather - Cloudy - 2:00 AM Williamson County, IL Hourly Weather - Cloudy - 3:00 AM Williamson County, IL Hourly Weather - Cloudy - 4:00 AM Williamson County, IL Hourly Weather - Cloudy - 5:00 AM Williamson County, IL Hourly Weather - Cloudy - 6:00 AM Williamson County, IL Hourly Weather - Cloudy - 7:00 AM Williamson County, IL Hourly Weather - Cloudy - 8:00 AM Williamson County, IL Hourly Weather - Cloudy - 9:00 AM Williamson County, IL Hourly Weather - Cloudy - 10:00 AM Williamson County, IL Hourly Weather - Cloudy - 11:00 AM Williamson County, IL Hourly Weather - Cloudy - 12:00 PM Williamson County, IL Hourly Weather - Cloudy - 1:00 PM Williamson County, IL Hourly Weather - Cloudy - 2:00 PM Williamson County, IL Hourly Weather - Cloudy - 3:00 PM Williamson County, IL Hourly Weather - Cloudy - 4:00 PM Williamson County, IL Hourly Weather - Mostly Cloudy - 5:00 PM Williamson County, IL Hourly Weather - Mostly Cloudy - 6:00 PM Williamson County, IL Hourly Weather - Mostly Cloudy - 7:00 PM Williamson County, IL Hourly Weather - Cloudy - 8:00 PM Williamson County, IL Hourly Weather - Cloudy - 9:00 PM Williamson County, IL Hourly Weather - Cloudy - 10:00 PM Williamson County, IL Hourly Weather - Cloudy - 11:00 PM
Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Cloudy Cloudy Cloudy Cloudy
39°F4°C 40°F4°C 40°F4°C 41°F5°C 42°F6°C 42°F6°C 43°F6°C 46°F8°C 48°F9°C 51°F11°C 54°F12°C 56°F13°C 59°F15°C 61°F16°C 63°F17°C 65°F18°C 64°F18°C 64°F18°C 63°F17°C 62°F17°C 62°F17°C 61°F16°C 61°F16°C 60°F16°C
- Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain - - - - -
0% 52% 52% 52% 52% 52% 52% 34% 34% 34% 34% 34% 34% 23% 23% 23% 23% 23% 23% 19% 19% 19% 19% 19%
38°F3°C 39°F4°C 39°F4°C 40°F4°C 41°F5°C 41°F5°C 42°F6°C 44°F7°C 45°F7°C 47°F8°C 48°F9°C 50°F10°C 51°F11°C 52°F11°C 52°F11°C 53°F12°C 53°F12°C 53°F12°C 53°F12°C 53°F12°C 53°F12°C 53°F12°C 53°F12°C 53°F12°C
96% 96% 96% 96% 96% 96% 96% 93% 89% 86% 80% 80% 75% 72% 67% 65% 67% 67% 70% 72% 72% 75% 75% 78%
NE ENE E E ESE ESE SE SE SSE SSE S S SSE SSE S S S S S S S SSE S S
1 mph 1 mph 1 mph 1 mph 1 mph 3 mph 3 mph 3 mph 8 mph 8 mph 8 mph 9 mph 9 mph 9 mph 10 mph 10 mph 10 mph 6 mph 6 mph 6 mph 4 mph 4 mph 4 mph 7 mph
5 mi8 km 5 mi8 km 5 mi8 km 5 mi8 km 6 mi10 km 6 mi10 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km
Hour (CST)
Weather
Clouds
Temperature
Precip. Type
POP
Dewpoint
Humidity
Wind Direction
Wind Speed
Visibility
POP = Probability of Precipitation. ** Indicates missing data/values from KMWA model statistics.

Trending Headlines

Trending Entertainment Headlines

Williamson County Radar Loop

Use the map search tool if you want to place a location marker on the radar map...
Prob Precip % = Probability of Precipitation.

Williamson County 36 Hour Forecast

POP = Probability of Precipitation. ** Indicates missing data/values from model statistics.

E-mail the Williamson County Weather Forecast

Voice your opinion or tell us about page issues...

Williamson County IL Weather - 1:19 am

What are people saying?

Contact Us