Current Conditions

Decatur, Illinois

65°F19°C

Drizzle

Wind

ENE 5 mph7 km/h

Humidity

71%

Cloud Cover

88%

As of Thursday, July 23, 2026 at 10:57 PM CDT

Today's Outlook

Night

Mostly cloudy, with a low around 62°F16°C. Light wind from the ESE around 4 mph7 km/h. 23% chance of drizzle in the evening.

7-Day Forecast

Day	Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
FridayJul 24	Drizzle	High 77°F25°C	Low 62°F16°C	Precip 0.04 in0.9 mm45%	Cloud 72%	Wind SE 4 mph6 km/h	Friday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 63°F17°C. Light wind from the SE around 4 mph6 km/h. 45% chance of drizzle around midday. Friday Night: Mostly cloudy, with a low around 62°F16°C. Light wind from the ESE around 4 mph7 km/h. 23% chance of drizzle in the evening.
SaturdayJul 25	Drizzle	High 83°F28°CFeels 89°F32°C	Low 68°F20°C	Precip 0.07 in1.7 mm45%	Cloud 75%	Wind S 5 mph8 km/h	Saturday: Overcast and warm, with a high of 83°F28°C and morning low of 68°F20°C. Breezy from the S at 6 to 7 mph10 to 11 km/h. 45% chance of drizzle throughout the day. Humid. Saturday Night: Mostly cloudy, with a low around 68°F20°C. Light wind from the S around 4 mph7 km/h. 30% chance of drizzle before dawn.
SundayJul 26	Hot	High 93°F34°CFeels 108°F42°C	Low 74°F23°C	Precip 0.02 in0.5 mm7%	Cloud 61%	Wind SSW 5 mph9 km/h	Sunday: Mostly cloudy and hot, with a high of 93°F34°C and morning low of 75°F24°C — feels like 108°F42°C. Breezy from the SW at 6 to 7 mph9 to 11 km/h. Heat risk in the afternoon. Sunday Night: Mostly cloudy, with a low around 74°F23°C. Light wind from the S around 5 mph8 km/h.
MondayJul 27	Showers	High 94°F34°CFeels 106°F41°C	Low 77°F25°C	Precip 0.13 in3.3 mm29%	Cloud 48%	Wind SW 7 mph11 km/h	Monday: Partly cloudy and hot, with a high of 94°F34°C and morning low of 77°F25°C — feels like 106°F41°C. Breezy from the SW at 8 to 9 mph12 to 14 km/h. 29% chance of showers throughout the day. Heat risk in the afternoon. Monday Night: Mostly cloudy, with a low around 79°F26°C. Breezy from the SSW at 7 mph10 km/h. 24% chance of showers throughout the night.
TuesdayJul 28	Drizzle	High 90°F32°CFeels 97°F36°C	Low 77°F25°C	Precip 0.05 in1.2 mm10%	Cloud 31%	Wind N 8 mph12 km/h	Tuesday: Partly cloudy and hot, with a high of 90°F32°C and morning low of 77°F25°C — feels like 97°F36°C. Breezy from the N at 8 to 9 mph13 to 15 km/h. 10% chance of drizzle throughout the day. Heat risk in the afternoon. Tuesday Night: Mostly clear, with a low around 78°F26°C. Breezy from the N at 7 mph11 km/h.
WednesdayJul 29	Clear	High 88°F31°C	Low 69°F21°C	Precip 0.01 in0.3 mm6%	Cloud 16%	Wind NE 6 mph9 km/h	Wednesday: Mostly clear and hot, with a high of 88°F31°C and morning low of 69°F21°C. Light wind from the NNE around 6 mph10 km/h. Humid. Wednesday Night: Mostly clear, with a low around 70°F21°C. Light wind from the NE around 6 mph9 km/h.
ThursdayJul 30	Clear	High 89°F31°C	Low 69°F21°C	Precip 0.01 in0.2 mm4%	Cloud 19%	Wind E 5 mph8 km/h	Thursday: Mostly clear and hot, with a high of 89°F31°C and morning low of 69°F21°C. Light wind from the E around 5 mph8 km/h. Humid. Thursday Night: Mostly clear, with a low around 69°F21°C. Light wind from the E around 5 mph8 km/h.

15-Day Forecast

	Day	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Condition	Wind (mph)
	FridayJul 24	77°F25°C	62°F16°C	0.04 in0.9 mm· 45%	72%	Drizzle	SE 4 mph6 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 63°F17°C. Light wind from the SE around 4 mph6 km/h. 45% chance of drizzle around midday. NightMostly cloudy, with a low around 62°F16°C. Light wind from the ESE around 4 mph7 km/h. 23% chance of drizzle in the evening.
	SaturdayJul 25	83°F28°C Feels 89°F32°C	68°F20°C	0.07 in1.7 mm· 45%	75%	Drizzle	S 5 mph8 km/h
DayOvercast and warm, with a high of 83°F28°C and morning low of 68°F20°C. Breezy from the S at 6 to 7 mph10 to 11 km/h. 45% chance of drizzle throughout the day. Humid. NightMostly cloudy, with a low around 68°F20°C. Light wind from the S around 4 mph7 km/h. 30% chance of drizzle before dawn.
	SundayJul 26	93°F34°C Feels 108°F42°C	74°F23°C	0.02 in0.5 mm· 7%	61%	Hot	SSW 5 mph9 km/h
DayMostly cloudy and hot, with a high of 93°F34°C and morning low of 75°F24°C — feels like 108°F42°C. Breezy from the SW at 6 to 7 mph9 to 11 km/h. Heat risk in the afternoon. NightMostly cloudy, with a low around 74°F23°C. Light wind from the S around 5 mph8 km/h.
	MondayJul 27	94°F34°C Feels 106°F41°C	77°F25°C	0.13 in3.3 mm· 29%	48%	Showers	SW 7 mph11 km/h
DayPartly cloudy and hot, with a high of 94°F34°C and morning low of 77°F25°C — feels like 106°F41°C. Breezy from the SW at 8 to 9 mph12 to 14 km/h. 29% chance of showers throughout the day. Heat risk in the afternoon. NightMostly cloudy, with a low around 79°F26°C. Breezy from the SSW at 7 mph10 km/h. 24% chance of showers throughout the night.
	TuesdayJul 28	90°F32°C Feels 97°F36°C	77°F25°C	0.05 in1.2 mm· 10%	31%	Drizzle	N 8 mph12 km/h
DayPartly cloudy and hot, with a high of 90°F32°C and morning low of 77°F25°C — feels like 97°F36°C. Breezy from the N at 8 to 9 mph13 to 15 km/h. 10% chance of drizzle throughout the day. Heat risk in the afternoon. NightMostly clear, with a low around 78°F26°C. Breezy from the N at 7 mph11 km/h.
	WednesdayJul 29	88°F31°C	69°F21°C	0.01 in0.3 mm· 6%	16%	Clear	NE 6 mph9 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 69°F21°C. Light wind from the NNE around 6 mph10 km/h. Humid. NightMostly clear, with a low around 70°F21°C. Light wind from the NE around 6 mph9 km/h.
	ThursdayJul 30	89°F31°C	69°F21°C	0.01 in0.2 mm· 4%	19%	Clear	E 5 mph8 km/h
DayMostly clear and hot, with a high of 89°F31°C and morning low of 69°F21°C. Light wind from the E around 5 mph8 km/h. Humid. NightMostly clear, with a low around 69°F21°C. Light wind from the E around 5 mph8 km/h.
	FridayJul 31	88°F31°C Feels 91°F33°C	71°F22°C	0.08 in2 mm· 17%	37%	Drizzle	SSE 5 mph8 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 71°F22°C. Light wind from the S around 5 mph9 km/h. 17% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 71°F22°C. Light wind from the SE around 5 mph8 km/h. 15% chance of drizzle in the evening.
	SaturdayAug 1	89°F31°C	71°F22°C	0.05 in1.3 mm· 21%	38%	Drizzle	NW 6 mph9 km/h
DayPartly cloudy and hot, with a high of 89°F31°C and morning low of 71°F22°C. Breezy from the WNW at 6 to 7 mph10 to 11 km/h. 21% chance of drizzle in the morning. Humid. NightPartly cloudy, with a low around 71°F22°C. Light wind from the NNE around 5 mph8 km/h. 14% chance of drizzle throughout the night.
	SundayAug 2	88°F31°C	70°F21°C	0.03 in0.8 mm· 10%	34%	Drizzle	NE 6 mph9 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 70°F21°C. Breezy from the N at 6 to 7 mph10 to 11 km/h. 10% chance of drizzle throughout the day. NightPartly cloudy, with a low around 70°F21°C. Light wind from the ENE around 6 mph9 km/h.
	MondayAug 3	88°F31°C	69°F20°C	0.05 in1.2 mm· 10%	37%	Drizzle	SSE 6 mph10 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 69°F20°C. Breezy from the S at 7 mph11 km/h. 10% chance of drizzle in the afternoon. NightPartly cloudy, with a low around 69°F21°C. Breezy from the SE at 6 to 7 mph10 to 11 km/h.
	TuesdayAug 4	88°F31°C	71°F22°C	0.11 in2.8 mm· 15%	48%	Showers	SSW 7 mph12 km/h
DayMostly cloudy and hot, with a high of 88°F31°C and morning low of 71°F22°C. Breezy from the SSW at 8 mph13 km/h. 15% chance of showers throughout the day. Humid. NightPartly cloudy, with a low around 72°F22°C. Breezy from the S at 7 mph11 km/h. 12% chance of showers throughout the night.
	WednesdayAug 5	86°F30°C	71°F22°C	0.09 in2.2 mm· 14%	48%	Drizzle	WSW 7 mph12 km/h
DayMostly cloudy and hot, with a high of 86°F30°C and morning low of 71°F22°C. Breezy from the WSW at 8 mph13 km/h. 14% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 72°F22°C. Breezy from the SW at 7 mph11 km/h. 14% chance of drizzle throughout the night.
	ThursdayAug 6	85°F29°C	69°F20°C	0.1 in2.5 mm· 18%	43%	Drizzle	SW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 69°F20°C. Breezy from the WSW at 8 mph12 km/h. 18% chance of drizzle throughout the day. NightPartly cloudy, with a low around 69°F21°C. Breezy from the SSW at 6 to 7 mph10 to 11 km/h. 11% chance of drizzle throughout the night.
	FridayAug 7	86°F30°C	68°F20°C	0.06 in1.4 mm· 11%	43%	Drizzle	SSW 7 mph11 km/h
DayPartly cloudy and hot, with a high of 86°F30°C and morning low of 68°F20°C. Breezy from the SW at 7 to 8 mph12 to 13 km/h. 11% chance of drizzle throughout the day. NightPartly cloudy, with a low around 68°F20°C. Light wind from the S 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

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