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Washington, IL 61571 Weather
Current conditions
Observed at Peoria - General Downing-Peoria International Airport · 20 min ago
Forecast
10-day-
Overnight
Clear, with a low around 44. Southeast wind around 2 mph.
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Wednesday
Sunny, with a high near 74. Southwest wind around 2 mph.
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Wednesday Night
Clear, with a low around 49. Wind around 0 mph.
National Weather Service forecast updated 55 min ago.
Hourly
Hourly forecast- Now48°
- 3 AM47°
- 4 AM46°
- 5 AM46°
- 6 AM45°
- 7 AM44°
- 8 AM46°
- 9 AM54°
- 10 AM60°
- 11 AM65°
- 12 PM68°
- 1 PM72°
- 2 PM73°
- 3 PM74°
- 4 PM74°
- 5 PM72°
- 6 PM67°
- 7 PM62°
- 8 PM60°
- 9 PM59°
- 10 PM57°
- 11 PM56°
- Thu12 AM54°
- 1 AM53°
10-day forecast
Details- TonightOct 20Clear44°
- TodayOct 21Sunny49°74°
- ThuOct 22Sunny48°76°
- FriOct 23Sunny49°73°
- SatOct 24Mostly Sunny51°74°
- SunOct 25Mostly Sunny51°75°
- MonOct 26Partly Sunny11%48°70°
- TueOct 27Slight Chance Rain Showers16%61°
- WedOct 28Partly cloudy39°51°
- ThuOct 29Mostly sunny34°54°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Washington
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Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Forecast
- WedModerate
- ThuModerate
- FriModerate
Peoria, IL reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyGeneral Wayne A. Downing International Ap, records since 1896. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Peoria 14 km
- North Peoria 14 km
- Bloomington 43 km
- Normal 42 km
- Pekin 24 km
- East Peoria 14 km
- Morton 11 km
- Canton 54 km
- Bartonville 20 km
- Chillicothe 25 km
- Peoria Heights 14 km
- Eureka 13 km
Forecasters' discussion
From the National Weather Service office in ILX, issued 1 hr ago
Key Messages
- Dry conditions and tranquil weather prevail across central and southeast Illinois through this weekend.
- Above normal temperatures will dominate the region, with afternoon highs climbing into the mid to upper 70s.
Discussion
Issued at 1233 PM CDT Tue Oct 20 2026
Expansive surface high pressure centered south of James Bay extends southwest into the mid and lower Mississippi Valley this afternoon. Broad subsidence and very dry air below 500 mb will lead to clear skies through tonight. High temperatures to peak in the lower 70s today, followed by overnight lows in the mid 40s.
A moderating trend begins Wednesday and continues through this weekend as upper level ridging amplifies overhead. Suite of model guidance indicates 850 hPa temperatures warming to +11C to +13C through this period. Afternoon mix-down of this air will lead to daily highs in the mid 70s through Friday, then upper 70s to around 80F this weekend when southwest low level flow becomes better established. Forecast soundings show daytime boundary layer mixing reducing afternoon dewpoints into the 40s, yielding minimum relative humidity values between 30 and 40 percent. Normally in late October this would result in an enhanced risk of fire spread, but a weak MSLP gradient will promote light winds under 10 mph through Friday.
A transition in the upper air pattern begins Monday into Tuesday as a potent upper-level trough traverses the northern Plains and lifts toward the Upper Midwest. The ECMWF-AI and operational ECMWF-Ens have remained consistent with a slightly slower frontal passage than the GEFS members, bringing the attendant cold front into western Illinois Monday evening and clearing southeast Illinois Tuesday afternoon. The NBM introduces slight chance PoPs (15 percent) west of the Illinois River Monday afternoon. With a lack of upper level support and projected dry airmass, models generally show a dry frontal passage for the remainder of the CWA.
Aviation
Issued at 1239 AM CDT Wed Oct 21 2026
VFR conditions will prevail at all TAF sites next 24hrs with clear skies. Winds will remain light and variable.
Ilx Watches
None.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.