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Washington IL Weather - Clear - 82°F
Clear
82°F
Updated 9:02 pm
Feels Like 71°F
Humidity 56%
Wind SSE 5 mph
Barometer  30.03 in
Dew Point 65°F
Washington IL Weather - Clear - 28°C
Clear
28°C
Updated 9:02 pm
Feels Like 22°C
Humidity 56%
Wind SSE 8 km/h
Barometer  101.7 kPa
Dew Point 18°C
Washington, IL Weather and Current Conditionswashington il weather forecast

Washington, IL Weather Forecast

Washington Illinois WeatherWashington, Illinois Weather Weather Forecast
14 day API Washington, IL weather forecast. Note. Our 7-day weather forecast for Washington, Illinois is our most reliable and accurate forecast. This model should only be used as a likely scenario. Forecasting more than 7 days is difficult.
Washington, IL Weather Forecast Dated: 902 PM Tue Sep 08 2026
Expect a very warm period with a mix of sun and clouds and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate.

Tuesday, September 8, 2026

Mid-Morning
Washington Weather - 2026-09-08 - Morning - Overcast
70°F 21°C
Overcast
Mid-Afternoon
Washington Weather - 2026-09-08 - Afternoon - Sunny
86°F 30°C
Sunny
Early-Evening
Washington Weather - 2026-09-08 - Evening - Sunny
80°F 26°C
Sunny
Warm and summery near 86°F 30°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds turning from the S to the SSE at 10 mph 16 km/h. Gusts up to 22 mph 35 km/h.

Wednesday, September 9, 2026

Mid-Morning
Washington Weather - 2026-09-09 - Morning - Scattered Showers
73°F 23°C
Scattered Showers
Mid-Afternoon
Washington Weather - 2026-09-09 - Afternoon - Overcast
82°F 28°C
Overcast
Early-Evening
Washington Weather - 2026-09-09 - Evening - Overcast
77°F 25°C
Overcast
Quite warm reaching 82°F 28°C, feeling like 86°F 30°C during peak afternoon, scattered downpours possible, with steady humidity and steady pressure. Winds switching from the SSW to the SW at 4 mph 6 km/h.

Thursday, September 10, 2026

Mid-Morning
Washington Weather - 2026-09-10 - Morning - Overcast
67°F 19°C
Overcast
Mid-Afternoon
Washington Weather - 2026-09-10 - Afternoon - Sunny
78°F 26°C
Sunny
Early-Evening
Washington Weather - 2026-09-10 - Evening - Sunny
71°F 21°C
Sunny
Enjoyable around 78°F 26°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds NNE at 9 mph 14 km/h.

Friday, September 11, 2026

Mid-Morning
Washington Weather - 2026-09-11 - Morning - Sunny
67°F 20°C
Sunny
Mid-Afternoon
Washington Weather - 2026-09-11 - Afternoon - Overcast
88°F 31°C
Overcast
Early-Evening
Washington Weather - 2026-09-11 - Evening - Sunny
78°F 26°C
Sunny
Warm temperatures up to 88°F 31°C, sunny in the morning, overcast in the afternoon, and sunny this evening, with lower humidity and barometric pressure falling. Winds swinging from the SSE to the SE at 9 mph 14 km/h.

Saturday, September 12, 2026

Mid-Morning
Washington Weather - 2026-09-12 - Morning - Light Showers
69°F 20°C
Light Showers
Mid-Afternoon
Washington Weather - 2026-09-12 - Afternoon - Overcast
84°F 29°C
Overcast
Early-Evening
Washington Weather - 2026-09-12 - Evening - Overcast
74°F 24°C
Overcast
Very warm with a high of 84°F 29°C, scattered morning showers before drying out later, with steady humidity and steady pressure. Winds shifting from the WNW to the ESE at 5 mph 8 km/h.

Sunday, September 13, 2026

Mid-Morning
Washington Weather - 2026-09-13 - Morning - Overcast
72°F 22°C
Overcast
Mid-Afternoon
Washington Weather - 2026-09-13 - Afternoon - Overcast
84°F 29°C
Overcast
Early-Evening
Washington Weather - 2026-09-13 - Evening - Cloudy
80°F 27°C
Cloudy
Warm and summery near 84°F 29°C, overcast in the morning, cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds S at 9 mph 15 km/h.

Monday, September 14, 2026

Mid-Morning
Washington Weather - 2026-09-14 - Morning - Sunny
77°F 25°C
Sunny
Mid-Afternoon
Washington Weather - 2026-09-14 - Afternoon - Sunny
91°F 33°C
Sunny
Early-Evening
Washington Weather - 2026-09-14 - Evening - Partly Cloudy
82°F 28°C
Partly Cloudy
Sizzling hot near 91°F 33°C with a heat index reaching 94°F 35°C, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds switching from the S to the E at 14 mph 22 km/h. Gusts up to 22 mph 36 km/h.

Tuesday, September 15, 2026

Mid-Morning
Washington Weather - 2026-09-15 - Morning - Light Showers
67°F 20°C
Light Showers
Mid-Afternoon
Washington Weather - 2026-09-15 - Afternoon - Sunny
76°F 24°C
Sunny
Early-Evening
Washington Weather - 2026-09-15 - Evening - Partly Cloudy
71°F 22°C
Partly Cloudy
Enjoyable around 76°F 24°C, scattered morning showers before drying out later, with lower humidity and steady pressure. Winds moving from the NW to the NNE at 7 mph 12 km/h.

Wednesday, September 16, 2026

Mid-Morning
Washington Weather - 2026-09-16 - Morning - Scattered Showers
66°F 19°C
Scattered Showers
Mid-Afternoon
Washington Weather - 2026-09-16 - Afternoon - Scattered Showers
81°F 27°C
Scattered Showers
Early-Evening
Washington Weather - 2026-09-16 - Evening - Cloudy
78°F 26°C
Cloudy
Warm temperatures up to 81°F 27°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds swinging from the E to the ESE at 10 mph 15 km/h.

Thursday, September 17, 2026

Mid-Morning
Washington Weather - 2026-09-17 - Morning - Sunny
79°F 26°C
Sunny
Mid-Afternoon
Washington Weather - 2026-09-17 - Afternoon - Sunny
95°F 35°C
Sunny
Early-Evening
Washington Weather - 2026-09-17 - Evening - Partly Cloudy
91°F 33°C
Partly Cloudy
Sizzling hot near 95°F 35°C with a heat index reaching 98°F 37°C, sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling. Winds out of the SSW at 13 mph 21 km/h. Gusts up to 25 mph 39 km/h.

Friday, September 18, 2026

Mid-Morning
Washington Weather - 2026-09-18 - Morning - Sunny
82°F 28°C
Sunny
Mid-Afternoon
Washington Weather - 2026-09-18 - Afternoon - Overcast
71°F 22°C
Overcast
Early-Evening
Washington Weather - 2026-09-18 - Evening - Overcast
63°F 18°C
Overcast
Pleasant near 71°F 22°C, cloudy in the morning, becoming overcast through the afternoon and evening, with increasing humidity and steady pressure. Winds turning from the SW to the ESE at 7 mph 11 km/h.

Saturday, September 19, 2026

Mid-Morning
Washington Weather - 2026-09-19 - Morning - Overcast
51°F 11°C
Overcast
Mid-Afternoon
Washington Weather - 2026-09-19 - Afternoon - Overcast
57°F 14°C
Overcast
Early-Evening
Washington Weather - 2026-09-19 - Evening - Overcast
53°F 12°C
Overcast
Crisp with a high near 57°F 14°C, overcast throughout the day, with lower humidity and steady pressure. Winds switching from the SE to the NE at 10 mph 16 km/h. Gusts up to 20 mph 32 km/h.

Sunday, September 20, 2026

Mid-Morning
Washington Weather - 2026-09-20 - Morning - Sunny
51°F 10°C
Sunny
Mid-Afternoon
Washington Weather - 2026-09-20 - Afternoon - Sunny
62°F 17°C
Sunny
Early-Evening
Washington Weather - 2026-09-20 - Evening - Sunny
57°F 14°C
Sunny
Refreshing around 62°F 17°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds out of the E at 6 mph 9 km/h.

Monday, September 21, 2026

Mid-Morning
Washington Weather - 2026-09-21 - Morning - Sunny
55°F 13°C
Sunny
Mid-Afternoon
Washington Weather - 2026-09-21 - Afternoon - Sunny
69°F 21°C
Sunny
Early-Evening
Washington Weather - 2026-09-21 - Evening - Sunny
63°F 17°C
Sunny
Mild temperatures up to 69°F 21°C, sunny throughout the day, with steady humidity and steady pressure.

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Weather by the Numbers

Tue, 8th
Washington IL Weather - Tuesday, Sep 8, 2026 - Sunny
Hi: 88°F 31°C
Lo: 61°F 16°C
Sunrise 06:31 AM
Sunset 07:18 PM
Wind S 8 mph13 km/h
Dew Point 66°F19°C
uv Index 6
Barometric Pressure 30.06 in1018 mb
POP 2% *
Humidity 51%
Wed, 9th
Washington IL Weather - Wednesday, Sep 9, 2026 - Patchy Rain Nearby
Hi: 89°F 31°C
Lo: 70°F 21°C
Sunrise 06:32 AM
Sunset 07:17 PM
Wind WSW 8 mph13 km/h
Dew Point 66°F19°C
uv Index 7
Barometric Pressure 29.97 in1015 mb
POP 36% *
Humidity 51%
Thu, 10th
Washington IL Weather - Thursday, Sep 10, 2026 - Overcast
Hi: 78°F 26°C
Lo: 66°F 19°C
Sunrise 06:33 AM
Sunset 07:15 PM
Wind NE 8 mph13 km/h
Dew Point 58°F14°C
uv Index 3
Barometric Pressure 30 in1016 mb
POP 12% *
Humidity 58%
Fri, 11th
Washington IL Weather - Friday, Sep 11, 2026 - Overcast
Hi: 88°F 31°C
Lo: 59°F 15°C
Sunrise 06:34 AM
Sunset 07:13 PM
Wind S 10 mph16 km/h
Dew Point 67°F20°C
uv Index 6
Barometric Pressure 29.88 in1012 mb
POP 16% *
Humidity 66%
Sat, 12th
Washington IL Weather - Saturday, Sep 12, 2026 - Overcast
Hi: 86°F 30°C
Lo: 66°F 19°C
Sunrise 06:35 AM
Sunset 07:12 PM
Wind SSW 13 mph21 km/h
Dew Point 62°F17°C
uv Index 5
Barometric Pressure 29.88 in1012 mb
POP 12% *
Humidity 51%
Sun, 13th
Washington IL Weather - Sunday, Sep 13, 2026 - Overcast
Hi: 85°F 29°C
Lo: 70°F 21°C
Sunrise 06:36 AM
Sunset 07:10 PM
Wind SSW 8 mph13 km/h
Dew Point 67°F19°C
uv Index 6
Barometric Pressure 29.94 in1014 mb
POP 15% *
Humidity 65%
Mon, 14th
Washington IL Weather - Monday, Sep 14, 2026 - Sunny
Hi: 93°F 34°C
Lo: 71°F 22°C
Sunrise 06:37 AM
Sunset 07:08 PM
Wind SW 13 mph21 km/h
Dew Point 66°F19°C
uv Index 8
Barometric Pressure 29.85 in1011 mb
POP 2% *
Humidity 48%
Tue, 15th
Washington IL Weather - Tuesday, Sep 15, 2026 - Patchy Rain Nearby
Hi: 76°F 24°C
Lo: 66°F 19°C
Sunrise 06:38 AM
Sunset 07:07 PM
Wind NW 9 mph15 km/h
Dew Point 62°F17°C
uv Index 5
Barometric Pressure 30.06 in1018 mb
POP 8% *
Humidity 70%
Wed, 16th
Washington IL Weather - Wednesday, Sep 16, 2026 - Overcast
Hi: 82°F 28°C
Lo: 63°F 17°C
Sunrise 06:39 AM
Sunset 07:05 PM
Wind ESE 8 mph12 km/h
Dew Point 62°F16°C
uv Index 5
Barometric Pressure 30.21 in1023 mb
POP 12% *
Humidity 62%
Thu, 17th
Washington IL Weather - Thursday, Sep 17, 2026 - Sunny
Hi: 96°F 36°C
Lo: 72°F 22°C
Sunrise 06:40 AM
Sunset 07:03 PM
Wind SSW 14 mph22 km/h
Dew Point 67°F19°C
uv Index 8
Barometric Pressure 30.09 in1019 mb
POP 1% *
Humidity 48%
Fri, 18th
Washington IL Weather - Friday, Sep 18, 2026 - Overcast
Hi: 86°F 30°C
Lo: 62°F 17°C
Sunrise 06:41 AM
Sunset 07:02 PM
Wind WNW 9 mph14 km/h
Dew Point 65°F18°C
uv Index 6
Barometric Pressure 30.06 in1018 mb
POP 11% *
Humidity 50%
Sat, 19th
Washington IL Weather - Saturday, Sep 19, 2026 - Overcast
Hi: 60°F 16°C
Lo: 50°F 10°C
Sunrise 06:42 AM
Sunset 07:00 PM
Wind NNE 16 mph25 km/h
Dew Point 41°F5°C
uv Index 3
Barometric Pressure 30.27 in1025 mb
POP 13% *
Humidity 57%
Sun, 20th
Washington IL Weather - Sunday, Sep 20, 2026 - Sunny
Hi: 63°F 17°C
Lo: 45°F 7°C
Sunrise 06:43 AM
Sunset 06:58 PM
Wind E 8 mph13 km/h
Dew Point 38°F3°C
uv Index 4
Barometric Pressure 30.27 in1025 mb
POP 2% *
Humidity 46%
Mon, 21st
Washington IL Weather - Monday, Sep 21, 2026 - Sunny
Hi: 70°F 21°C
Lo: 48°F 9°C
Sunrise 06:44 AM
Sunset 06:56 PM
Wind SE 4 mph6 km/h
Dew Point 42°F5°C
uv Index 5
Barometric Pressure 30.24 in1024 mb
POP 1% *
Humidity 43%
* POP = Probability of Precipitation. Data for 12:00 PM.