Current Conditions

Decatur, Illinois

74°F24°C

Drizzle

Wind

E 4 mph6 km/h

Humidity

48%

Cloud Cover

72%

As of Thursday, July 23, 2026 at 8:10 PM CDT

Today's Outlook

Night

Mostly cloudy, with a low around 61°F16°C. Light wind from the ESE around 4 mph7 km/h. 25% 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 76°F25°C	Low 61°F16°C	Precip 0.04 in1 mm50%	Cloud 71%	Wind SE 4 mph6 km/h	Friday: Mostly cloudy and warm, with a high of 76°F25°C and morning low of 63°F17°C. Light wind from the SE around 4 mph6 km/h. 50% chance of drizzle around midday. Friday Night: Mostly cloudy, with a low around 61°F16°C. Light wind from the ESE around 4 mph7 km/h. 25% chance of drizzle in the evening.
SaturdayJul 25	Drizzle	High 82°F28°CFeels 87°F31°C	Low 67°F20°C	Precip 0.06 in1.4 mm38%	Cloud 74%	Wind S 5 mph8 km/h	Saturday: Overcast and warm, with a high of 82°F28°C and morning low of 68°F20°C. Light wind from the S around 6 mph9 km/h. 38% chance of drizzle in the morning. Humid. Saturday Night: Mostly cloudy, with a low around 67°F20°C. Light wind from the S around 4 mph7 km/h. 26% chance of drizzle before dawn.
SundayJul 26	Showers	High 93°F34°CFeels 106°F41°C	Low 73°F23°C	Precip 0.03 in0.7 mm13%	Cloud 62%	Wind SSW 5 mph8 km/h	Sunday: Mostly cloudy and hot, with a high of 93°F34°C and morning low of 74°F24°C — feels like 106°F41°C. Light wind from the SW around 5 mph8 km/h. Heat risk in the afternoon. Sunday Night: Mostly cloudy, with a low around 73°F23°C. Light wind from the S around 5 mph8 km/h. 13% chance of showers overnight.
MondayJul 27	Showers	High 94°F34°CFeels 105°F41°C	Low 77°F25°C	Precip 0.13 in3.2 mm33%	Cloud 48%	Wind SSW 8 mph12 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 10 mph13 to 15 km/h. 33% 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 mph11 km/h. 18% chance of showers throughout the night.
TuesdayJul 28	Hot	High 90°F32°CFeels 98°F36°C	Low 77°F25°C	Precip 0.03 in0.8 mm7%	Cloud 29%	Wind N 7 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. 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 89°F32°C	Low 70°F21°C	Precip 0 in0.1 mm2%	Cloud 15%	Wind NE 6 mph9 km/h	Wednesday: Mostly clear and hot, with a high of 89°F32°C and morning low of 70°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 5 mph9 km/h.
ThursdayJul 30	Clear	High 89°F32°C	Low 70°F21°C	Precip 0.03 in0.8 mm6%	Cloud 21%	Wind E 5 mph8 km/h	Thursday: Mostly clear and hot, with a high of 89°F32°C and morning low of 70°F21°C. Light wind from the ESE around 5 mph9 km/h. Humid. Thursday Night: Mostly clear, with a low around 70°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	76°F25°C	61°F16°C	0.04 in1 mm· 50%	71%	Drizzle	SE 4 mph6 km/h
DayMostly cloudy and warm, with a high of 76°F25°C and morning low of 63°F17°C. Light wind from the SE around 4 mph6 km/h. 50% chance of drizzle around midday. NightMostly cloudy, with a low around 61°F16°C. Light wind from the ESE around 4 mph7 km/h. 25% chance of drizzle in the evening.
	SaturdayJul 25	82°F28°C Feels 87°F31°C	67°F20°C	0.06 in1.4 mm· 38%	74%	Drizzle	S 5 mph8 km/h
DayOvercast and warm, with a high of 82°F28°C and morning low of 68°F20°C. Light wind from the S around 6 mph9 km/h. 38% chance of drizzle in the morning. Humid. NightMostly cloudy, with a low around 67°F20°C. Light wind from the S around 4 mph7 km/h. 26% chance of drizzle before dawn.
	SundayJul 26	93°F34°C Feels 106°F41°C	73°F23°C	0.03 in0.7 mm· 13%	62%	Showers	SSW 5 mph8 km/h
DayMostly cloudy and hot, with a high of 93°F34°C and morning low of 74°F24°C — feels like 106°F41°C. Light wind from the SW around 5 mph8 km/h. Heat risk in the afternoon. NightMostly cloudy, with a low around 73°F23°C. Light wind from the S around 5 mph8 km/h. 13% chance of showers overnight.
	MondayJul 27	94°F34°C Feels 105°F41°C	77°F25°C	0.13 in3.2 mm· 33%	48%	Showers	SSW 8 mph12 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 10 mph13 to 15 km/h. 33% 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 mph11 km/h. 18% chance of showers throughout the night.
	TuesdayJul 28	90°F32°C Feels 98°F36°C	77°F25°C	0.03 in0.8 mm· 7%	29%	Hot	N 7 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. 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	89°F32°C	70°F21°C	0 in0.1 mm· 2%	15%	Clear	NE 6 mph9 km/h
DayMostly clear and hot, with a high of 89°F32°C and morning low of 70°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 5 mph9 km/h.
	ThursdayJul 30	89°F32°C	70°F21°C	0.03 in0.8 mm· 6%	21%	Clear	E 5 mph8 km/h
DayMostly clear and hot, with a high of 89°F32°C and morning low of 70°F21°C. Light wind from the ESE around 5 mph9 km/h. Humid. NightMostly clear, with a low around 70°F21°C. Light wind from the E around 5 mph8 km/h.
	FridayJul 31	90°F32°C Feels 93°F34°C	72°F22°C	0.05 in1.2 mm· 10%	36%	Drizzle	SSE 5 mph9 km/h
DayPartly cloudy and hot, with a high of 90°F32°C and morning low of 72°F22°C. Light wind from the SSW around 6 mph9 km/h. Humid. NightPartly cloudy, with a low around 72°F22°C. Light wind from the SE around 5 mph8 km/h. 10% chance of drizzle in the evening.
	SaturdayAug 1	89°F32°C	71°F22°C	0.07 in1.8 mm· 16%	36%	Drizzle	N 6 mph9 km/h
DayPartly cloudy and hot, with a high of 89°F32°C and morning low of 71°F22°C. Light wind from the NNW around 6 mph10 km/h. 15% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 72°F22°C. Light wind from the E around 5 mph8 km/h. 16% chance of drizzle throughout the night.
	SundayAug 2	89°F32°C	70°F21°C	0.02 in0.5 mm· 6%	32%	Clear	SE 6 mph9 km/h
DayPartly cloudy and hot, with a high of 89°F32°C and morning low of 70°F21°C. Light wind from the S around 6 mph10 km/h. Humid. NightPartly cloudy, with a low around 71°F21°C. Light wind from the ESE around 5 mph9 km/h.
	MondayAug 3	89°F32°C	70°F21°C	0.05 in1.3 mm· 15%	40%	Drizzle	S 7 mph11 km/h
DayPartly cloudy and hot, with a high of 89°F32°C and morning low of 70°F21°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h. 14% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 71°F22°C. Breezy from the SSE at 6 to 7 mph10 to 12 km/h. 15% chance of drizzle in the evening.
	TuesdayAug 4	87°F30°C	71°F22°C	0.15 in3.7 mm· 22%	51%	Showers	SW 7 mph12 km/h
DayMostly cloudy and hot, with a high of 87°F30°C and morning low of 71°F22°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. 22% chance of showers throughout the day. Humid. NightPartly cloudy, with a low around 72°F22°C. Breezy from the SSW at 7 mph11 km/h. 20% chance of showers throughout the night.
	WednesdayAug 5	86°F30°C	69°F21°C	0.11 in2.8 mm· 14%	42%	Drizzle	W 7 mph11 km/h
DayPartly cloudy and warm, with a high of 86°F30°C and morning low of 69°F21°C. Breezy from the W at 8 to 9 mph12 to 14 km/h. 14% chance of drizzle throughout the day. NightPartly cloudy, with a low around 70°F21°C. Breezy from the WSW at 6 to 7 mph10 to 11 km/h. 12% chance of drizzle throughout the night.
	ThursdayAug 6	85°F29°C	68°F20°C	0.07 in1.7 mm· 15%	41%	Drizzle	WSW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 68°F20°C. Breezy from the W at 7 to 8 mph12 to 12 km/h. 15% chance of drizzle throughout the day. NightPartly cloudy, with a low around 68°F20°C. Light wind from the SSW around 6 mph10 km/h. 10% chance of drizzle throughout the night.
	FridayAug 7	85°F30°C	68°F20°C	0.07 in1.7 mm· 10%	44%	Drizzle	SSW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 85°F30°C and morning low of 68°F20°C. Breezy from the SSW at 7 to 8 mph11 to 12 km/h. 10% 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