Weather in Ottawa, IL
Updated 2026-08-11 11:00 local time · ZIP codes 61350
Partly cloudy
No government weather alerts were returned for this location at the latest update.
Next hours
70°34% rain
73°84% rain
76°32% rain85°23% rain83°28% rain84°28% rain83°19% rain
82°8% rain79°13% rain
77°17% rain76°18% rain76°18% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance reaches about 84% over the next 12 hours.
It feels like 70°F with winds near 2 mph.
82°F, 8% rain chance and 8 mph wind.
Visibility is around 10 mi; gusts may reach 14 mph.
Current temperature is 70°F, wind 2 mph, rain chance up to 84%.
UV index is 2.
Ottawa weather today
Partly cloudy and 70°F in Ottawa, IL. Today's high is 85°F with a 76% rain chance. Winds are around 2 mph with gusts near 2 mph. Relative humidity is 100%, pressure is 29.95 inHg, and visibility is about 10 miles.
Tonight and tomorrow in Ottawa
Sunrise is at 06:00 AM and sunset is at 08:00 PM. Tomorrow's forecast calls for Sunny with a high near 80°F and a low near 68°F. The maximum rain chance is 84%.