Current Conditions

Decatur, Illinois

73°F23°C

Light Rain

Wind

ESE 4 mph7 km/h

Humidity

93%

Cloud Cover

62%

As of Thursday, August 13, 2026 at 1:06 AM CDT

Today's Outlook

Day

Overcast and warm, with a high of 83°F28°C and morning low of 73°F23°C. Breezy from the SE at 6 to 8 mph10 to 12 km/h. 63% chance of light rain throughout the day. Heavy, humid air.

Night

Mostly cloudy, with a low around 72°F22°C. Breezy from the ESE at 5 to 7 mph8 to 11 km/h. 21% chance of drizzle throughout the night.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Light Rain	High 83°F28°CFeels 88°F31°C	Low 72°F22°C	Precip 0.09 in2.4 mm63%	Cloud 87%	Wind ESE 6 mph9 km/h	Thursday: Overcast and warm, with a high of 83°F28°C and morning low of 73°F23°C. Breezy from the SE at 6 to 8 mph10 to 12 km/h. 63% chance of light rain throughout the day. Heavy, humid air. Thursday Night: Mostly cloudy, with a low around 72°F22°C. Breezy from the ESE at 5 to 7 mph8 to 11 km/h. 21% chance of drizzle throughout the night.
Light Rain	High 86°F30°CFeels 94°F35°C	Low 73°F23°C	Precip 0.24 in6.1 mm46%	Cloud 95%	Wind E 7 mph11 km/h	Friday: Overcast and hot, with a high of 86°F30°C and morning low of 73°F23°C — feels like 95°F35°C. Breezy from the ESE at 7 mph11 km/h. 46% chance of light rain throughout the day. Heavy, humid air. Friday Night: Overcast, with a low around 74°F23°C. Breezy from the E at 7 to 8 mph11 to 12 km/h. 43% chance of light rain throughout the night.
Rain	High 88°F31°CFeels 98°F36°C	Low 75°F24°C	Precip 0.35 in9 mm59%	Cloud 84%	Wind SSE 6 mph10 km/h	Saturday: Overcast and hot, with a high of 88°F31°C and morning low of 75°F24°C — feels like 97°F36°C. Breezy from the S at 6 to 7 mph10 to 12 km/h. 59% chance of rain throughout the day. Heat risk in the afternoon. Saturday Night: Mostly cloudy, with a low around 75°F24°C. Breezy from the SE at 6 to 8 mph10 to 12 km/h. 54% chance of light rain overnight.
Showers	High 90°F32°CFeels 101°F39°C	Low 78°F25°C	Precip 0.06 in1.4 mm21%	Cloud 58%	Wind W 8 mph12 km/h	Sunday: Mostly cloudy and hot, with a high of 90°F32°C and morning low of 78°F25°C — feels like 102°F39°C. Breezy from the W at 8 to 9 mph13 to 14 km/h. 14% chance of drizzle in the morning. Heat risk in the afternoon. Sunday Night: Mostly cloudy, with a low around 78°F26°C. Breezy from the W at 7 mph12 km/h. 21% chance of showers in the evening.
Showers	High 82°F28°CFeels 85°F30°C	Low 71°F22°C	Precip 0.07 in1.9 mm20%	Cloud 61%	Wind NNW 7 mph10 km/h	Monday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 71°F22°C. Breezy from the NNW at 7 to 8 mph12 to 13 km/h. 16% chance of drizzle around midday. Humid. Monday Night: Mostly cloudy, with a low around 72°F22°C. Light wind from the NNW around 6 mph9 km/h. 20% chance of showers overnight.
Clear	High 85°F29°C	Low 66°F19°C	Precip 0 in0.1 mm3%	Cloud 37%	Wind SE 4 mph7 km/h	Tuesday: Partly cloudy and warm, with a high of 85°F29°C and morning low of 66°F19°C. Light wind from the S around 4 mph6 km/h. Humid. Tuesday Night: Partly cloudy, with a low around 66°F19°C. Light wind from the ESE around 4 mph7 km/h.
Showers	High 88°F31°CFeels 94°F34°C	Low 72°F22°C	Precip 0.11 in2.8 mm17%	Cloud 62%	Wind SSW 8 mph12 km/h	Wednesday: Mostly cloudy and hot, with a high of 88°F31°C and morning low of 72°F22°C — feels like 93°F34°C. Breezy from the SSW at 8 to 9 mph14 to 15 km/h. 17% chance of showers throughout the day. Humid. Wednesday Night: Mostly cloudy, with a low around 72°F22°C. Breezy from the S at 7 mph11 km/h. 13% chance of showers throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdayAug 13	83°F28°C Feels 88°F31°C	72°F22°C	0.09 in2.4 mm· 63%	87%	Light Rain	ESE 6 mph9 km/h
DayOvercast and warm, with a high of 83°F28°C and morning low of 73°F23°C. Breezy from the SE at 6 to 8 mph10 to 12 km/h. 63% chance of light rain throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 72°F22°C. Breezy from the ESE at 5 to 7 mph8 to 11 km/h. 21% chance of drizzle throughout the night.
	FridayAug 14	86°F30°C Feels 94°F35°C	73°F23°C	0.24 in6.1 mm· 46%	95%	Light Rain	E 7 mph11 km/h
DayOvercast and hot, with a high of 86°F30°C and morning low of 73°F23°C — feels like 95°F35°C. Breezy from the ESE at 7 mph11 km/h. 46% chance of light rain throughout the day. Heavy, humid air. NightOvercast, with a low around 74°F23°C. Breezy from the E at 7 to 8 mph11 to 12 km/h. 43% chance of light rain throughout the night.
	SaturdayAug 15	88°F31°C Feels 98°F36°C	75°F24°C	0.35 in9 mm· 59%	84%	Rain	SSE 6 mph10 km/h
DayOvercast and hot, with a high of 88°F31°C and morning low of 75°F24°C — feels like 97°F36°C. Breezy from the S at 6 to 7 mph10 to 12 km/h. 59% chance of rain throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 75°F24°C. Breezy from the SE at 6 to 8 mph10 to 12 km/h. 54% chance of light rain overnight.
	SundayAug 16	90°F32°C Feels 101°F39°C	78°F25°C	0.06 in1.4 mm· 21%	58%	Showers	W 8 mph12 km/h
DayMostly cloudy and hot, with a high of 90°F32°C and morning low of 78°F25°C — feels like 102°F39°C. Breezy from the W at 8 to 9 mph13 to 14 km/h. 14% chance of drizzle in the morning. Heat risk in the afternoon. NightMostly cloudy, with a low around 78°F26°C. Breezy from the W at 7 mph12 km/h. 21% chance of showers in the evening.
	MondayAug 17	82°F28°C Feels 85°F30°C	71°F22°C	0.07 in1.9 mm· 20%	61%	Showers	NNW 7 mph10 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 71°F22°C. Breezy from the NNW at 7 to 8 mph12 to 13 km/h. 16% chance of drizzle around midday. Humid. NightMostly cloudy, with a low around 72°F22°C. Light wind from the NNW around 6 mph9 km/h. 20% chance of showers overnight.
	TuesdayAug 18	85°F29°C	66°F19°C	0 in0.1 mm· 3%	37%	Clear	SE 4 mph7 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 66°F19°C. Light wind from the S around 4 mph6 km/h. Humid. NightPartly cloudy, with a low around 66°F19°C. Light wind from the ESE around 4 mph7 km/h.
	WednesdayAug 19	88°F31°C Feels 94°F34°C	72°F22°C	0.11 in2.8 mm· 17%	62%	Showers	SSW 8 mph12 km/h
DayMostly cloudy and hot, with a high of 88°F31°C and morning low of 72°F22°C — feels like 93°F34°C. Breezy from the SSW at 8 to 9 mph14 to 15 km/h. 17% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 72°F22°C. Breezy from the S at 7 mph11 km/h. 13% chance of showers throughout the night.
	ThursdayAug 20	84°F29°C	71°F21°C	0.07 in1.8 mm· 12%	48%	Showers	NNW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 84°F29°C and morning low of 71°F21°C. Breezy from the NNW at 7 to 8 mph12 to 12 km/h. 11% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 72°F22°C. Breezy from the N at 7 mph11 km/h. 12% chance of showers throughout the night.
	FridayAug 21	83°F28°C	66°F19°C	0.07 in1.7 mm· 12%	43%	Drizzle	NE 6 mph10 km/h
DayMostly cloudy and warm, with a high of 83°F28°C and morning low of 66°F19°C. Breezy from the NE at 7 mph11 km/h. 12% chance of drizzle throughout the day. NightPartly cloudy, with a low around 67°F19°C. Light wind from the ENE around 6 mph9 km/h. 10% chance of drizzle throughout the night.
	SaturdayAug 22	83°F29°C	66°F19°C	0.06 in1.4 mm· 10%	36%	Showers	NE 6 mph10 km/h
DayPartly cloudy and warm, with a high of 83°F29°C and morning low of 66°F19°C. Breezy from the WNW at 7 mph11 km/h. NightPartly cloudy, with a low around 67°F19°C. Light wind from the E around 6 mph9 km/h. 10% chance of showers overnight.
	SundayAug 23	84°F29°C	65°F19°C	0.02 in0.6 mm· 5%	31%	Clear	ENE 6 mph10 km/h
DayPartly cloudy and warm, with a high of 84°F29°C and morning low of 65°F19°C. Breezy from the NW at 6 to 7 mph10 to 11 km/h. NightPartly cloudy, with a low around 66°F19°C. Light wind from the E around 6 mph9 km/h.
	MondayAug 24	85°F29°C	66°F19°C	0.03 in0.7 mm· 5%	30%	Clear	E 6 mph10 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 66°F19°C. Breezy from the E at 7 mph11 km/h. NightPartly cloudy, with a low around 67°F19°C. Light wind from the E around 6 mph10 km/h.
	TuesdayAug 25	86°F30°C	66°F19°C	0.02 in0.4 mm· 5%	31%	Clear	ESE 6 mph10 km/h
DayPartly cloudy and warm, with a high of 86°F30°C and morning low of 66°F19°C. Breezy from the SSE at 7 mph11 km/h. NightPartly cloudy, with a low around 67°F19°C. Light wind from the ESE around 6 mph10 km/h.
	WednesdayAug 26	87°F30°C	67°F20°C	0.03 in0.7 mm· 5%	36%	Clear	ESE 6 mph10 km/h
DayPartly cloudy and hot, with a high of 87°F30°C and morning low of 67°F20°C. Breezy from the SSW at 7 mph11 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the E around 6 mph10 km/h.
	ThursdayAug 27	85°F29°C	66°F19°C	0.02 in0.5 mm· 9%	43%	Partly Cloudy	ENE 6 mph10 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 66°F19°C. Breezy from the E at 7 mph11 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the ENE around 6 mph10 km/h.

Nearby Cities

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

About This Forecast

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