Weather in Frederick, IL
Updated 2026-09-26 08:45 local time · ZIP codes 62639
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
58°15% rain63°13% rain63°13% rain63°13% rain
62°16% rain
60°36% rain58°47% rain56°51% rain56°69% rain55°71% rain
56°60% rain
57°30% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance reaches about 71% over the next 12 hours.
It feels like 54°F with winds near 6 mph.
63°F, 13% rain chance and 2 mph wind.
Visibility is around 6 mi; gusts may reach 14 mph.
Current temperature is 58°F, wind 6 mph, rain chance up to 71%.
UV index is 0.
Local weather characteristics in Frederick
Illinois has four distinct seasons with hot, humid summers, cold winters, strong frontal changes and frequent spring and summer thunderstorms.
Frederick is part of the Midwest weather region. The forecast point is near 40.07°N latitude and 90.43°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Frederick weather today
Overcast and 58°F in Frederick, IL. Today's high is 63°F with a 69% rain chance. Winds are around 6 mph with gusts near 13 mph. Relative humidity is 63%, pressure is 30.16 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Frederick
Sunrise is at 06:53 AM and sunset is at 06:52 PM. Tomorrow's forecast calls for Sunny with a high near 72°F and a low near 56°F. The maximum rain chance is 63%.