Current Conditions

DeKalb, Illinois

71°F21°C

Light Rain

Wind

E 5 mph8 km/h

Humidity

96%

Cloud Cover

98%

As of Thursday, August 13, 2026 at 8:24 AM CDT

Today's Outlook

Day

Overcast and warm, with a high of 77°F25°C and morning low of 71°F21°C. Breezy from the E at 5 to 7 mph9 to 12 km/h. 81% chance of light rain in the afternoon. Humid.

Night

Overcast, with a low around 72°F22°C. Light wind from the E around 6 mph9 km/h. 83% chance of light rain throughout the night.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Light Rain	High 77°F25°C	Low 71°F21°C	Precip 0.2 in5.1 mm83%	Cloud 98%	Wind E 5 mph9 km/h	Thursday: Overcast and warm, with a high of 77°F25°C and morning low of 71°F21°C. Breezy from the E at 5 to 7 mph9 to 12 km/h. 81% chance of light rain in the afternoon. Humid. Thursday Night: Overcast, with a low around 72°F22°C. Light wind from the E around 6 mph9 km/h. 83% chance of light rain throughout the night.
Rain	High 77°F25°C	Low 70°F21°C	Precip 0.83 in21.1 mm92%	Cloud 96%	Wind E 7 mph10 km/h	Friday: Overcast and warm, with a high of 77°F25°C and morning low of 70°F21°C. Breezy from the ESE at 7 mph11 km/h. 92% chance of rain throughout the day. Humid. Friday Night: Overcast, with a low around 70°F21°C. Breezy from the E at 6 to 7 mph10 to 12 km/h. 90% chance of rain throughout the night.
Rain	High 80°F27°C	Low 71°F22°C	Precip 0.59 in14.9 mm76%	Cloud 92%	Wind SSE 6 mph10 km/h	Saturday: Overcast and warm, with a high of 80°F27°C and morning low of 71°F22°C. Light wind from the SSE around 6 mph10 km/h. 76% chance of rain throughout the day. Heavy, humid air. Saturday Night: Overcast, with a low around 71°F22°C. Breezy from the SE at 6 to 7 mph9 to 11 km/h. 51% chance of light rain throughout the night.
Light Rain	High 84°F29°CFeels 90°F32°C	Low 74°F23°C	Precip 0.32 in8.1 mm46%	Cloud 82%	Wind WNW 7 mph11 km/h	Sunday: Overcast and warm, with a high of 84°F29°C and morning low of 74°F23°C — feels like 90°F32°C. Breezy from the WNW at 8 to 9 mph13 to 14 km/h. 46% chance of light rain throughout the day. Heavy, humid air. Sunday Night: Mostly cloudy, with a low around 74°F23°C. Breezy from the WNW at 6 to 7 mph10 to 12 km/h. 46% chance of light rain throughout the night.
Drizzle	High 80°F26°C	Low 67°F19°C	Precip 0.02 in0.6 mm11%	Cloud 52%	Wind NNW 6 mph9 km/h	Monday: Mostly cloudy and warm, with a high of 80°F26°C and morning low of 67°F19°C. Light wind from the NNW around 6 mph10 km/h. 11% chance of drizzle. Monday Night: Partly cloudy, with a low around 68°F20°C. Breezy from the NNW at 5 to 7 mph8 to 11 km/h.
Partly Cloudy	High 82°F28°C	Low 63°F17°C	Precip 0.01 in0.2 mm8%	Cloud 51%	Wind SSW 6 mph10 km/h	Tuesday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 63°F17°C. Breezy from the SW at 7 to 9 mph11 to 14 km/h. Tuesday Night: Partly cloudy, with a low around 63°F17°C. Breezy from the SSW at 5 to 7 mph9 to 11 km/h.
Light Rain	High 80°F27°C	Low 69°F21°C	Precip 0.27 in6.8 mm47%	Cloud 76%	Wind SW 8 mph13 km/h	Wednesday: Overcast and warm, with a high of 80°F27°C and morning low of 69°F21°C. Breezy from the SW at 9 mph14 km/h. 47% chance of light rain throughout the day. Humid. Wednesday Night: Mostly cloudy, with a low around 70°F21°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h. 38% chance of light rain throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdayAug 13	77°F25°C	71°F21°C	0.2 in5.1 mm· 83%	98%	Light Rain	E 5 mph9 km/h
DayOvercast and warm, with a high of 77°F25°C and morning low of 71°F21°C. Breezy from the E at 5 to 7 mph9 to 12 km/h. 81% chance of light rain in the afternoon. Humid. NightOvercast, with a low around 72°F22°C. Light wind from the E around 6 mph9 km/h. 83% chance of light rain throughout the night.
	FridayAug 14	77°F25°C	70°F21°C	0.83 in21.1 mm· 92%	96%	Rain	E 7 mph10 km/h
DayOvercast and warm, with a high of 77°F25°C and morning low of 70°F21°C. Breezy from the ESE at 7 mph11 km/h. 92% chance of rain throughout the day. Humid. NightOvercast, with a low around 70°F21°C. Breezy from the E at 6 to 7 mph10 to 12 km/h. 90% chance of rain throughout the night.
	SaturdayAug 15	80°F27°C	71°F22°C	0.59 in14.9 mm· 76%	92%	Rain	SSE 6 mph10 km/h
DayOvercast and warm, with a high of 80°F27°C and morning low of 71°F22°C. Light wind from the SSE around 6 mph10 km/h. 76% chance of rain throughout the day. Heavy, humid air. NightOvercast, with a low around 71°F22°C. Breezy from the SE at 6 to 7 mph9 to 11 km/h. 51% chance of light rain throughout the night.
	SundayAug 16	84°F29°C Feels 90°F32°C	74°F23°C	0.32 in8.1 mm· 46%	82%	Light Rain	WNW 7 mph11 km/h
DayOvercast and warm, with a high of 84°F29°C and morning low of 74°F23°C — feels like 90°F32°C. Breezy from the WNW at 8 to 9 mph13 to 14 km/h. 46% chance of light rain throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 74°F23°C. Breezy from the WNW at 6 to 7 mph10 to 12 km/h. 46% chance of light rain throughout the night.
	MondayAug 17	80°F26°C	67°F19°C	0.02 in0.6 mm· 11%	52%	Drizzle	NNW 6 mph9 km/h
DayMostly cloudy and warm, with a high of 80°F26°C and morning low of 67°F19°C. Light wind from the NNW around 6 mph10 km/h. 11% chance of drizzle. NightPartly cloudy, with a low around 68°F20°C. Breezy from the NNW at 5 to 7 mph8 to 11 km/h.
	TuesdayAug 18	82°F28°C	63°F17°C	0.01 in0.2 mm· 8%	51%	Partly Cloudy	SSW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 63°F17°C. Breezy from the SW at 7 to 9 mph11 to 14 km/h. NightPartly cloudy, with a low around 63°F17°C. Breezy from the SSW at 5 to 7 mph9 to 11 km/h.
	WednesdayAug 19	80°F27°C	69°F21°C	0.27 in6.8 mm· 47%	76%	Light Rain	SW 8 mph13 km/h
DayOvercast and warm, with a high of 80°F27°C and morning low of 69°F21°C. Breezy from the SW at 9 mph14 km/h. 47% chance of light rain throughout the day. Humid. NightMostly cloudy, with a low around 70°F21°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h. 38% chance of light rain throughout the night.
	ThursdayAug 20	76°F25°C	65°F18°C	0.09 in2.3 mm· 12%	53%	Drizzle	N 7 mph11 km/h
DayMostly cloudy and warm, with a high of 76°F25°C and morning low of 65°F18°C. Breezy from the NNW at 8 mph12 km/h. 11% chance of drizzle throughout the day. NightPartly cloudy, with a low around 65°F18°C. Breezy from the N at 6 to 7 mph10 to 12 km/h. 12% chance of drizzle throughout the night.
	FridayAug 21	78°F26°C	61°F16°C	0.05 in1.2 mm· 9%	44%	Partly Cloudy	ESE 6 mph9 km/h
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 61°F16°C. Breezy from the SSW at 6 to 7 mph10 to 11 km/h. NightPartly cloudy, with a low around 61°F16°C. Light wind from the E around 5 mph9 km/h.
	SaturdayAug 22	80°F27°C	63°F17°C	0.09 in2.2 mm· 12%	44%	Drizzle	S 6 mph10 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 63°F17°C. Breezy from the SSW at 7 mph11 km/h. 12% chance of drizzle throughout the day. NightPartly cloudy, with a low around 63°F17°C. Light wind from the SSE around 6 mph9 km/h. 11% chance of drizzle throughout the night.
	SundayAug 23	82°F28°C	64°F18°C	0.03 in0.7 mm· 8%	42%	Partly Cloudy	S 7 mph11 km/h
DayPartly cloudy and warm, with a high of 82°F28°C and morning low of 64°F18°C. Breezy from the SSW at 7 to 8 mph11 to 13 km/h. NightPartly cloudy, with a low around 64°F18°C. Light wind from the SSE around 6 mph10 km/h.
	MondayAug 24	84°F29°C	66°F19°C	0.04 in0.9 mm· 8%	41%	Partly Cloudy	S 7 mph10 km/h
DayPartly cloudy and warm, with a high of 84°F29°C and morning low of 66°F19°C. Breezy from the SSW at 7 to 8 mph12 to 13 km/h. NightPartly cloudy, with a low around 66°F19°C. Light wind from the SSE around 6 mph9 km/h.
	TuesdayAug 25	84°F29°C	67°F19°C	0.04 in0.9 mm· 10%	43%	Drizzle	SSE 6 mph10 km/h
DayPartly cloudy and warm, with a high of 84°F29°C and morning low of 67°F19°C. Breezy from the S at 7 mph10 km/h. Humid. NightPartly cloudy, with a low around 67°F20°C. Light wind from the SSE around 6 mph9 km/h. 10% chance of drizzle in the evening.
	WednesdayAug 26	83°F28°C	66°F19°C	0.05 in1.2 mm· 9%	43%	Partly Cloudy	NE 7 mph11 km/h
DayPartly cloudy and warm, with a high of 83°F28°C and morning low of 66°F19°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. NightPartly cloudy, with a low around 67°F20°C. Light wind from the E around 6 mph10 km/h.
	ThursdayAug 27	81°F27°C	65°F18°C	0.07 in1.8 mm· 15%	49%	Drizzle	NE 6 mph10 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 65°F18°C. Breezy from the NE at 7 mph11 km/h. 15% chance of drizzle throughout the day. NightPartly cloudy, with a low around 66°F19°C. Light wind from the ENE around 6 mph10 km/h. 12% chance of drizzle throughout the night.

Nearby Cities

Sycamore5 mi8 km Wasco18 mi29 km St. Charles23 mi37 km Geneva23 mi37 km Batavia23 mi37 km Huntley23 mi38 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.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 41.9295°N, 88.7504°W·Elevation: 268m·Timezone: America/Chicago·Population: 43,211