Current Conditions

Decatur, Illinois

69°F21°C

Partly Cloudy

Wind

SW 9 mph15 km/h

Humidity

61%

Cloud Cover

18%

As of Tuesday, October 13, 2026 at 5:57 AM CDT

Today's Outlook

Night

Partly cloudy, with a low around 77°F25°C. Breezy from the SSW at 10 to 11 mph17 to 18 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Partly Cloudy	High 81°F27°C	Low 77°F25°C	Precip 0 in0 mm—	Cloud 42%	Wind SSW 10 mph17 km/h	Monday Night: Partly cloudy, with a low around 77°F25°C. Breezy from the SSW at 10 to 11 mph17 to 18 km/h.
Clear	High 86°F30°C	Low 69°F21°C	Precip 0 in0 mm—	Cloud 14%	Wind SW 9 mph15 km/h	Tuesday: Mostly clear and warm, with a high of 86°F30°C and morning low of 69°F21°C. Breezy from the SW at 9 mph14 km/h. Tuesday Night: Mostly clear, with a low around 70°F21°C. Breezy from the SW at 9 to 12 mph15 to 20 km/h.
Light Rain	High 77°F25°C	Low 65°F18°C	Precip 0.2 in5.1 mm71%	Cloud 86%	Wind N 8 mph12 km/h	Wednesday: Overcast and warm, with a high of 72°F22°C. Breezy from the N at 7 to 8 mph11 to 13 km/h. 71% chance of light rain in the morning. Humid. Wednesday Night: Overcast, with a low around 65°F18°C. Breezy from the NE at 9 mph14 km/h.
Light Rain	High 69°F21°C	Low 61°F16°C	Precip 0.41 in10.4 mm85%	Cloud 93%	Wind SE 10 mph15 km/h	Thursday: Overcast and warm, with a high of 69°F21°C and morning low of 61°F16°C. Breezy from the SE at 9 mph14 km/h. 85% chance of light rain in the morning. Thursday Night: Overcast, with a low around 61°F16°C. Breezy from the NNW at 10 to 14 mph16 to 23 km/h. 76% chance of light rain overnight.
Drizzle	High 59°F15°C	Low 46°F8°CFeels 41°F5°C	Precip 0.04 in1 mm43%	Cloud 66%	Wind NW 16 mph26 km/h	Friday: Mostly cloudy and mild, with a high of 53°F12°C and morning low of 48°F9°C. Windy from the NW at 18 to 20 mph29 to 32 km/h. Dry air. Friday Night: Mostly cloudy, with a low around 46°F8°C. Windy from the NW at 14 to 17 mph23 to 27 km/h. 43% chance of drizzle overnight.
Clear	High 55°F13°C	Low 35°F2°CFeels 30°F-1°C	Precip 0 in0 mm—	Cloud 4%	Wind W 7 mph11 km/h	Saturday: Mostly clear and mild, with a high of 55°F13°C and morning low of 35°F2°C. Breezy from the WSW at 6 to 7 mph9 to 11 km/h. Dry air. Saturday Night: Mostly clear, with a low around 36°F2°C. Breezy from the WNW at 8 to 10 mph13 to 16 km/h.
Clear	High 63°F17°C	Low 38°F4°CFeels 32°F0°C	Precip 0 in0.1 mm1%	Cloud 15%	Wind S 9 mph15 km/h	Sunday: Mostly clear and mild, with a high of 63°F17°C and morning low of 38°F4°C. Breezy from the S at 10 to 11 mph16 to 18 km/h. Dry air. Sunday Night: Mostly clear, with a low around 39°F4°C. Breezy from the S at 9 to 10 mph14 to 15 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	MondayOct 12	81°F27°C	77°F25°C	0 in0 mm· —	42%	Partly Cloudy	SSW 10 mph17 km/h
NightPartly cloudy, with a low around 77°F25°C. Breezy from the SSW at 10 to 11 mph17 to 18 km/h.
	TuesdayOct 13	86°F30°C	69°F21°C	0 in0 mm· —	14%	Clear	SW 9 mph15 km/h
DayMostly clear and warm, with a high of 86°F30°C and morning low of 69°F21°C. Breezy from the SW at 9 mph14 km/h. NightMostly clear, with a low around 70°F21°C. Breezy from the SW at 9 to 12 mph15 to 20 km/h.
	WednesdayOct 14	77°F25°C	65°F18°C	0.2 in5.1 mm· 71%	86%	Light Rain	N 8 mph12 km/h
DayOvercast and warm, with a high of 72°F22°C. Breezy from the N at 7 to 8 mph11 to 13 km/h. 71% chance of light rain in the morning. Humid. NightOvercast, with a low around 65°F18°C. Breezy from the NE at 9 mph14 km/h.
	ThursdayOct 15	69°F21°C	61°F16°C	0.41 in10.4 mm· 85%	93%	Light Rain	SE 10 mph15 km/h
DayOvercast and warm, with a high of 69°F21°C and morning low of 61°F16°C. Breezy from the SE at 9 mph14 km/h. 85% chance of light rain in the morning. NightOvercast, with a low around 61°F16°C. Breezy from the NNW at 10 to 14 mph16 to 23 km/h. 76% chance of light rain overnight.
	FridayOct 16	59°F15°C	46°F8°C Feels 41°F5°C	0.04 in1 mm· 43%	66%	Drizzle	NW 16 mph26 km/h
DayMostly cloudy and mild, with a high of 53°F12°C and morning low of 48°F9°C. Windy from the NW at 18 to 20 mph29 to 32 km/h. Dry air. NightMostly cloudy, with a low around 46°F8°C. Windy from the NW at 14 to 17 mph23 to 27 km/h. 43% chance of drizzle overnight.
	SaturdayOct 17	55°F13°C	35°F2°C Feels 30°F-1°C	0 in0 mm· —	4%	Clear	W 7 mph11 km/h
DayMostly clear and mild, with a high of 55°F13°C and morning low of 35°F2°C. Breezy from the WSW at 6 to 7 mph9 to 11 km/h. Dry air. NightMostly clear, with a low around 36°F2°C. Breezy from the WNW at 8 to 10 mph13 to 16 km/h.
	SundayOct 18	63°F17°C	38°F4°C Feels 32°F0°C	0 in0.1 mm· 1%	15%	Clear	S 9 mph15 km/h
DayMostly clear and mild, with a high of 63°F17°C and morning low of 38°F4°C. Breezy from the S at 10 to 11 mph16 to 18 km/h. Dry air. NightMostly clear, with a low around 39°F4°C. Breezy from the S at 9 to 10 mph14 to 15 km/h.
	MondayOct 19	66°F19°C	48°F9°C Feels 44°F7°C	0.01 in0.2 mm· 5%	52%	Partly Cloudy	S 9 mph14 km/h
DayMostly cloudy and mild, with a high of 66°F19°C and morning low of 48°F9°C. Breezy from the SSW at 9 to 10 mph15 to 16 km/h. Dry air. NightMostly cloudy, with a low around 48°F9°C. Breezy from the S at 8 to 10 mph14 to 16 km/h.
	TuesdayOct 20	71°F22°C	50°F10°C	0.02 in0.6 mm· 5%	32%	Clear	SSE 7 mph12 km/h
DayPartly cloudy and warm, with a high of 71°F22°C and morning low of 50°F10°C. Breezy from the S at 7 to 8 mph12 to 13 km/h. NightPartly cloudy, with a low around 51°F10°C. Breezy from the SSE at 7 to 8 mph12 to 13 km/h.
	WednesdayOct 21	72°F22°C	56°F13°C	0.09 in2.4 mm· 17%	50%	Drizzle	SSE 9 mph14 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 56°F13°C. Breezy from the SSE at 9 to 10 mph15 to 16 km/h. 15% chance of drizzle in the morning. NightPartly cloudy, with a low around 56°F14°C. Breezy from the SSE at 9 mph14 km/h. 17% chance of drizzle overnight.
	ThursdayOct 22	70°F21°C	59°F15°C	0.22 in5.7 mm· 33%	72%	Light Rain	S 10 mph15 km/h
DayMostly cloudy and warm, with a high of 70°F21°C and morning low of 59°F15°C. Breezy from the SSW at 10 mph16 km/h. 33% chance of light rain in the morning. NightMostly cloudy, with a low around 60°F15°C. Breezy from the S at 9 to 10 mph15 to 16 km/h. 30% chance of light rain overnight.
	FridayOct 23	68°F20°C	58°F14°C	0.2 in5.1 mm· 31%	71%	Light Rain	S 10 mph15 km/h
DayMostly cloudy and mild, with a high of 68°F20°C and morning low of 58°F14°C. Breezy from the SSW at 10 mph16 km/h. 31% chance of light rain in the morning. NightMostly cloudy, with a low around 58°F14°C. Breezy from the S at 9 to 10 mph15 to 16 km/h. 25% chance of light rain overnight.
	SaturdayOct 24	66°F19°C	55°F13°C	0.19 in4.7 mm· 31%	66%	Showers	SSW 10 mph15 km/h
DayMostly cloudy and mild, with a high of 66°F19°C and morning low of 55°F13°C. Breezy from the SSW at 10 mph16 km/h. 31% chance of showers in the morning. NightMostly cloudy, with a low around 55°F13°C. Breezy from the SSW at 9 to 10 mph15 to 16 km/h. 26% chance of showers overnight.
	SundayOct 25	62°F17°C	51°F10°C	0.12 in3 mm· 17%	63%	Showers	WSW 9 mph14 km/h
DayMostly cloudy and mild, with a high of 62°F17°C and morning low of 51°F10°C. Breezy from the WSW at 9 to 10 mph15 to 16 km/h. 17% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 51°F11°C. Breezy from the WSW at 9 mph14 km/h. 17% chance of showers overnight.
	MondayOct 26	59°F15°C	47°F8°C Feels 43°F6°C	0.09 in2.3 mm· 16%	59%	Flurries	W 8 mph13 km/h
DayMostly cloudy and mild, with a high of 59°F15°C and morning low of 47°F8°C. Breezy from the WNW at 9 mph14 km/h. 14% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 47°F8°C. Breezy from the W at 8 mph13 km/h. 16% chance of flurries overnight.

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