Current Conditions

Decatur, Illinois

97°F36°C

Hot

Feels like105°F40°C

Wind

SW 10 mph15 km/h

Humidity

43%

Cloud Cover

22%

As of Wednesday, September 2, 2026 at 12:37 PM CDT

Today's Outlook

Day

Mostly clear and hot, with a high of 98°F37°C and morning low of 78°F26°C — feels like 104°F40°C. Breezy from the SW at 9 to 10 mph14 to 15 km/h. Heat risk in the afternoon.

Night

Partly cloudy, with a low around 84°F29°C. Light wind from the S around 5 mph9 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Hot	High 98°F37°CFeels 105°F40°C	Low 78°F26°C	Precip 0 in0.1 mm4%	Cloud 23%	Wind SW 8 mph13 km/h	Wednesday: Mostly clear and hot, with a high of 98°F37°C and morning low of 78°F26°C — feels like 104°F40°C. Breezy from the SW at 9 to 10 mph14 to 15 km/h. Heat risk in the afternoon. Wednesday Night: Partly cloudy, with a low around 84°F29°C. Light wind from the S around 5 mph9 km/h.
Hot	High 97°F36°CFeels 103°F40°C	Low 78°F25°C	Precip 0 in0 mm—	Cloud 12%	Wind SW 7 mph11 km/h	Thursday: Mostly clear and hot, with a high of 97°F36°C and morning low of 78°F25°C — feels like 104°F40°C. Breezy from the SW at 8 to 9 mph12 to 14 km/h. Heat risk in the afternoon. Thursday Night: Mostly clear, with a low around 80°F27°C. Breezy from the SSW at 6 to 9 mph10 to 14 km/h.
Hot	High 97°F36°CFeels 102°F39°C	Low 76°F24°C	Precip 0 in0.1 mm4%	Cloud 15%	Wind SW 5 mph8 km/h	Friday: Mostly clear and hot, with a high of 97°F36°C and morning low of 76°F24°C. Light wind from the WSW around 5 mph8 km/h. Heat risk in the afternoon. Friday Night: Mostly clear, with a low around 78°F26°C. Light wind from the S around 5 mph8 km/h.
Showers	High 94°F35°CFeels 102°F39°C	Low 76°F25°C	Precip 0.06 in1.4 mm45%	Cloud 46%	Wind ENE 5 mph9 km/h	Saturday: Partly cloudy and hot, with a high of 94°F35°C and morning low of 76°F25°C — feels like 102°F39°C. Light wind from the ENE around 5 mph8 km/h. 45% chance of showers throughout the day. Heat risk in the afternoon. Saturday Night: Partly cloudy, with a low around 78°F25°C. Breezy from the E at 6 to 7 mph9 to 11 km/h. 27% chance of drizzle in the evening.
Partly Cloudy	High 88°F31°C	Low 72°F22°C	Precip 0.03 in0.8 mm8%	Cloud 53%	Wind ENE 7 mph11 km/h	Sunday: Mostly cloudy and hot, with a high of 88°F31°C and morning low of 72°F22°C. Breezy from the E at 7 to 8 mph11 to 13 km/h. Humid. Sunday Night: Mostly cloudy, with a low around 74°F23°C. Breezy from the ENE at 7 to 8 mph11 to 13 km/h.
Clear	High 88°F31°C	Low 68°F20°C	Precip 0.01 in0.3 mm4%	Cloud 39%	Wind E 7 mph11 km/h	Monday: Partly cloudy and hot, with a high of 88°F31°C and morning low of 68°F20°C. Breezy from the ESE at 7 mph11 km/h. Monday Night: Partly cloudy, with a low around 70°F21°C. Breezy from the E at 7 to 8 mph11 to 12 km/h.
Hot	High 95°F35°C	Low 69°F21°C	Precip 0 in0.1 mm2%	Cloud 36%	Wind SSE 8 mph12 km/h	Tuesday: Partly cloudy and hot, with a high of 95°F35°C and morning low of 69°F21°C. Breezy from the S at 8 to 9 mph12 to 14 km/h. Heat risk in the afternoon. Tuesday Night: Partly cloudy, with a low around 70°F21°C. Breezy from the SE at 7 to 9 mph12 to 15 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 2	98°F37°C Feels 105°F40°C	78°F26°C	0 in0.1 mm· 4%	23%	Hot	SW 8 mph13 km/h
DayMostly clear and hot, with a high of 98°F37°C and morning low of 78°F26°C — feels like 104°F40°C. Breezy from the SW at 9 to 10 mph14 to 15 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 84°F29°C. Light wind from the S around 5 mph9 km/h.
	ThursdaySep 3	97°F36°C Feels 103°F40°C	78°F25°C	0 in0 mm· —	12%	Hot	SW 7 mph11 km/h
DayMostly clear and hot, with a high of 97°F36°C and morning low of 78°F25°C — feels like 104°F40°C. Breezy from the SW at 8 to 9 mph12 to 14 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 80°F27°C. Breezy from the SSW at 6 to 9 mph10 to 14 km/h.
	FridaySep 4	97°F36°C Feels 102°F39°C	76°F24°C	0 in0.1 mm· 4%	15%	Hot	SW 5 mph8 km/h
DayMostly clear and hot, with a high of 97°F36°C and morning low of 76°F24°C. Light wind from the WSW around 5 mph8 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 78°F26°C. Light wind from the S around 5 mph8 km/h.
	SaturdaySep 5	94°F35°C Feels 102°F39°C	76°F25°C	0.06 in1.4 mm· 45%	46%	Showers	ENE 5 mph9 km/h
DayPartly cloudy and hot, with a high of 94°F35°C and morning low of 76°F25°C — feels like 102°F39°C. Light wind from the ENE around 5 mph8 km/h. 45% chance of showers throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 78°F25°C. Breezy from the E at 6 to 7 mph9 to 11 km/h. 27% chance of drizzle in the evening.
	SundaySep 6	88°F31°C	72°F22°C	0.03 in0.8 mm· 8%	53%	Partly Cloudy	ENE 7 mph11 km/h
DayMostly cloudy and hot, with a high of 88°F31°C and morning low of 72°F22°C. Breezy from the E at 7 to 8 mph11 to 13 km/h. Humid. NightMostly cloudy, with a low around 74°F23°C. Breezy from the ENE at 7 to 8 mph11 to 13 km/h.
	MondaySep 7	88°F31°C	68°F20°C	0.01 in0.3 mm· 4%	39%	Clear	E 7 mph11 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 68°F20°C. Breezy from the ESE at 7 mph11 km/h. NightPartly cloudy, with a low around 70°F21°C. Breezy from the E at 7 to 8 mph11 to 12 km/h.
	TuesdaySep 8	95°F35°C	69°F21°C	0 in0.1 mm· 2%	36%	Hot	SSE 8 mph12 km/h
DayPartly cloudy and hot, with a high of 95°F35°C and morning low of 69°F21°C. Breezy from the S at 8 to 9 mph12 to 14 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 70°F21°C. Breezy from the SE at 7 to 9 mph12 to 15 km/h.
	WednesdaySep 9	96°F36°C Feels 101°F38°C	77°F25°C	0.01 in0.3 mm· 7%	25%	Hot	SSW 10 mph15 km/h
DayPartly cloudy and hot, with a high of 96°F36°C and morning low of 77°F25°C. Breezy from the SW at 10 to 11 mph16 to 17 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 79°F26°C. Breezy from the SSW at 9 to 10 mph15 to 16 km/h.
	ThursdaySep 10	92°F33°C Feels 96°F35°C	76°F25°C	0.07 in1.7 mm· 14%	37%	Drizzle	SW 9 mph14 km/h
DayPartly cloudy and hot, with a high of 92°F33°C and morning low of 76°F25°C. Breezy from the SW at 9 mph14 km/h. 14% chance of drizzle throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 79°F26°C. Breezy from the SSW at 8 to 10 mph13 to 16 km/h. 10% chance of drizzle in the evening.
	FridaySep 11	90°F32°C	73°F23°C	0.14 in3.5 mm· 15%	45%	Showers	SSW 8 mph13 km/h
DayPartly cloudy and hot, with a high of 90°F32°C and morning low of 73°F23°C. Breezy from the SSW at 9 mph14 km/h. 15% chance of showers throughout the day. Humid. NightPartly cloudy, with a low around 75°F24°C. Breezy from the S at 8 to 9 mph13 to 14 km/h. 13% chance of showers throughout the night.
	SaturdaySep 12	87°F30°C	72°F22°C	0.15 in3.7 mm· 24%	56%	Showers	SSW 9 mph14 km/h
DayMostly cloudy and hot, with a high of 87°F30°C and morning low of 72°F22°C. Breezy from the SW at 9 to 10 mph15 to 16 km/h. 24% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 74°F23°C. Breezy from the SSW at 8 to 9 mph13 to 14 km/h. 20% chance of showers throughout the night.
	SundaySep 13	84°F29°C	69°F21°C	0.16 in4 mm· 21%	54%	Showers	SW 8 mph14 km/h
DayMostly cloudy and warm, with a high of 84°F29°C and morning low of 69°F21°C. Breezy from the SW at 9 mph14 km/h. 21% chance of showers throughout the day. NightMostly cloudy, with a low around 71°F22°C. Breezy from the SSW at 8 to 9 mph13 to 14 km/h. 19% chance of showers throughout the night.
	MondaySep 14	83°F28°C	67°F19°C	0.16 in4.1 mm· 21%	55%	Showers	SSW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 83°F28°C and morning low of 67°F19°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. 20% chance of showers throughout the day. NightMostly cloudy, with a low around 69°F20°C. Breezy from the S at 8 mph12 km/h. 21% chance of showers throughout the night.
	TuesdaySep 15	82°F28°C	65°F18°C	0.1 in2.5 mm· 13%	49%	Drizzle	SSE 8 mph13 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 65°F18°C. Breezy from the S at 8 to 9 mph13 to 15 km/h. 12% chance of drizzle throughout the day. NightPartly cloudy, with a low around 67°F19°C. Breezy from the SSE at 7 to 8 mph12 to 12 km/h. 13% chance of drizzle throughout the night.
	WednesdaySep 16	83°F28°C	64°F18°C	0.09 in2.2 mm· 14%	43%	Drizzle	S 8 mph12 km/h
DayPartly cloudy and warm, with a high of 83°F28°C and morning low of 64°F18°C. Breezy from the SSW at 8 to 9 mph13 to 14 km/h. 12% chance of drizzle throughout the day. NightPartly cloudy, with a low around 66°F19°C. Breezy from the SSE at 7 to 8 mph12 to 12 km/h. 14% chance of drizzle throughout the night.

Nearby Cities

Springfield37 mi59 km Mattoon40 mi64 km Champaign42 mi68 km Urbana44 mi70 km Bloomington45 mi72 km Normal47 mi75 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 39.8403°N, 88.9548°W·Elevation: 205m·Timezone: America/Chicago·Population: 73,254