Current Conditions

DeKalb, Illinois

88°F31°C

Hot

Feels like95°F35°C

Wind

SW 6 mph10 km/h

Humidity

61%

Cloud Cover

34%

As of Wednesday, September 2, 2026 at 6:43 PM CDT

Today's Outlook

Night

Mostly clear, with a low around 80°F27°C. Light wind from the SW around 6 mph10 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Hot	High 93°F34°CFeels 102°F39°C	Low 80°F27°C	Precip 0.01 in0.2 mm5%	Cloud 25%	Wind SW 8 mph13 km/h	Wednesday: Partly cloudy and hot, with a high of 93°F34°C — feels like 102°F39°C. Breezy from the SW at 10 to 11 mph17 to 18 km/h. Heat risk in the afternoon. Wednesday Night: Mostly clear, with a low around 80°F27°C. Light wind from the SW around 6 mph10 km/h.
Drizzle	High 90°F32°CFeels 96°F36°C	Low 75°F24°C	Precip 0.02 in0.5 mm14%	Cloud 40%	Wind SSW 6 mph9 km/h	Thursday: Mostly cloudy and hot, with a high of 90°F32°C and morning low of 75°F24°C — feels like 97°F36°C. Light wind from the SW around 6 mph9 km/h. 14% chance of drizzle in the afternoon. Heat risk in the afternoon. Thursday Night: Mostly clear, with a low around 77°F25°C. Light wind from the S around 6 mph10 km/h.
Showers	High 92°F33°CFeels 99°F37°C	Low 74°F23°C	Precip 0.05 in1.2 mm20%	Cloud 49%	Wind S 6 mph9 km/h	Friday: Mostly cloudy and hot, with a high of 92°F33°C and morning low of 74°F23°C — feels like 99°F37°C. Breezy from the SSW at 6 to 7 mph10 to 12 km/h. Heat risk in the afternoon. Friday Night: Partly cloudy, with a low around 74°F23°C. Light wind from the SE around 5 mph8 km/h. 20% chance of showers in the evening.
Showers	High 86°F30°CFeels 92°F33°C	Low 73°F23°C	Precip 0.11 in2.9 mm33%	Cloud 56%	Wind ENE 6 mph10 km/h	Saturday: Mostly cloudy and warm, with a high of 86°F30°C and morning low of 73°F23°C — feels like 91°F33°C. Light wind from the ENE around 6 mph9 km/h. 33% chance of showers throughout the day. Heavy, humid air. Saturday Night: Mostly cloudy, with a low around 73°F23°C. Breezy from the ENE at 6 to 7 mph10 to 12 km/h. 23% chance of showers throughout the night.
Partly Cloudy	High 82°F28°C	Low 69°F20°C	Precip 0.03 in0.7 mm9%	Cloud 68%	Wind E 6 mph10 km/h	Sunday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 69°F20°C. Breezy from the ESE at 6 to 7 mph10 to 11 km/h. Humid. Sunday Night: Mostly cloudy, with a low around 69°F21°C. Light wind from the E around 6 mph10 km/h.
Partly Cloudy	High 83°F28°C	Low 66°F19°C	Precip 0.02 in0.4 mm6%	Cloud 57%	Wind ESE 6 mph10 km/h	Monday: Mostly cloudy and warm, with a high of 83°F28°C and morning low of 66°F19°C. Breezy from the SE at 7 to 8 mph11 to 12 km/h. Monday Night: Mostly cloudy, with a low around 67°F19°C. Breezy from the ESE at 6 to 8 mph10 to 12 km/h.
Partly Cloudy	High 89°F32°CFeels 92°F33°C	Low 67°F19°C	Precip 0.02 in0.4 mm5%	Cloud 57%	Wind SSE 9 mph14 km/h	Tuesday: Mostly cloudy and hot, with a high of 89°F32°C and morning low of 67°F19°C. Breezy from the S at 9 to 11 mph15 to 18 km/h. Tuesday Night: Mostly cloudy, with a low around 67°F20°C. Breezy from the SSE at 8 to 10 mph13 to 16 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 2	93°F34°C Feels 102°F39°C	80°F27°C	0.01 in0.2 mm· 5%	25%	Hot	SW 8 mph13 km/h
DayPartly cloudy and hot, with a high of 93°F34°C — feels like 102°F39°C. Breezy from the SW at 10 to 11 mph17 to 18 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 80°F27°C. Light wind from the SW around 6 mph10 km/h.
	ThursdaySep 3	90°F32°C Feels 96°F36°C	75°F24°C	0.02 in0.5 mm· 14%	40%	Drizzle	SSW 6 mph9 km/h
DayMostly cloudy and hot, with a high of 90°F32°C and morning low of 75°F24°C — feels like 97°F36°C. Light wind from the SW around 6 mph9 km/h. 14% chance of drizzle in the afternoon. Heat risk in the afternoon. NightMostly clear, with a low around 77°F25°C. Light wind from the S around 6 mph10 km/h.
	FridaySep 4	92°F33°C Feels 99°F37°C	74°F23°C	0.05 in1.2 mm· 20%	49%	Showers	S 6 mph9 km/h
DayMostly cloudy and hot, with a high of 92°F33°C and morning low of 74°F23°C — feels like 99°F37°C. Breezy from the SSW at 6 to 7 mph10 to 12 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 74°F23°C. Light wind from the SE around 5 mph8 km/h. 20% chance of showers in the evening.
	SaturdaySep 5	86°F30°C Feels 92°F33°C	73°F23°C	0.11 in2.9 mm· 33%	56%	Showers	ENE 6 mph10 km/h
DayMostly cloudy and warm, with a high of 86°F30°C and morning low of 73°F23°C — feels like 91°F33°C. Light wind from the ENE around 6 mph9 km/h. 33% chance of showers throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 73°F23°C. Breezy from the ENE at 6 to 7 mph10 to 12 km/h. 23% chance of showers throughout the night.
	SundaySep 6	82°F28°C	69°F20°C	0.03 in0.7 mm· 9%	68%	Partly Cloudy	E 6 mph10 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 69°F20°C. Breezy from the ESE at 6 to 7 mph10 to 11 km/h. Humid. NightMostly cloudy, with a low around 69°F21°C. Light wind from the E around 6 mph10 km/h.
	MondaySep 7	83°F28°C	66°F19°C	0.02 in0.4 mm· 6%	57%	Partly Cloudy	ESE 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 SE at 7 to 8 mph11 to 12 km/h. NightMostly cloudy, with a low around 67°F19°C. Breezy from the ESE at 6 to 8 mph10 to 12 km/h.
	TuesdaySep 8	89°F32°C Feels 92°F33°C	67°F19°C	0.02 in0.4 mm· 5%	57%	Partly Cloudy	SSE 9 mph14 km/h
DayMostly cloudy and hot, with a high of 89°F32°C and morning low of 67°F19°C. Breezy from the S at 9 to 11 mph15 to 18 km/h. NightMostly cloudy, with a low around 67°F20°C. Breezy from the SSE at 8 to 10 mph13 to 16 km/h.
	WednesdaySep 9	91°F33°C Feels 96°F35°C	76°F24°C	0.05 in1.3 mm· 13%	44%	Drizzle	SW 9 mph15 km/h
DayPartly cloudy and hot, with a high of 91°F33°C and morning low of 76°F24°C. Breezy from the SW at 10 to 11 mph16 to 17 km/h. 11% chance of drizzle throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 77°F25°C. Breezy from the SSW at 9 to 11 mph15 to 17 km/h. 13% chance of drizzle throughout the night.
	ThursdaySep 10	83°F29°C	71°F22°C	0.22 in5.5 mm· 28%	52%	Showers	W 8 mph13 km/h
DayMostly cloudy and warm, with a high of 83°F29°C and morning low of 71°F22°C. Breezy from the W at 9 to 10 mph14 to 15 km/h. 27% chance of showers throughout the day. Humid. NightPartly cloudy, with a low around 71°F22°C. Breezy from the WSW at 8 to 9 mph12 to 14 km/h. 28% chance of showers throughout the night.
	FridaySep 11	83°F28°C	66°F19°C	0.09 in2.3 mm· 14%	42%	Drizzle	SSW 8 mph13 km/h
DayPartly cloudy and warm, with a high of 83°F28°C and morning low of 66°F19°C. Breezy from the SW at 9 to 10 mph14 to 15 km/h. 12% chance of drizzle throughout the day. NightPartly cloudy, with a low around 67°F19°C. Breezy from the S at 7 to 8 mph12 to 13 km/h. 14% chance of drizzle throughout the night.
	SaturdaySep 12	82°F28°C	65°F18°C	0.16 in4 mm· 21%	49%	Showers	SSW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 65°F18°C. Breezy from the SSW at 10 mph15 km/h. 21% chance of showers throughout the day. NightPartly cloudy, with a low around 66°F19°C. Breezy from the S at 8 mph13 km/h. 20% chance of showers throughout the night.
	SundaySep 13	82°F28°C	66°F19°C	0.13 in3.4 mm· 21%	53%	Showers	SSW 9 mph15 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 66°F19°C. Breezy from the SSW at 10 to 11 mph16 to 18 km/h. 21% chance of drizzle throughout the day. NightMostly cloudy, with a low around 67°F19°C. Breezy from the S at 8 to 9 mph13 to 14 km/h. 16% chance of showers throughout the night.
	MondaySep 14	81°F27°C	66°F19°C	0.16 in4 mm· 24%	53%	Showers	SSW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 66°F19°C. Breezy from the SSW at 9 to 10 mph15 to 16 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 68°F20°C. Breezy from the SSW at 8 to 9 mph13 to 14 km/h. 20% chance of showers throughout the night.
	TuesdaySep 15	79°F26°C	63°F17°C	0.17 in4.3 mm· 20%	49%	Showers	SW 8 mph14 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 63°F17°C. Breezy from the SW at 9 to 10 mph14 to 16 km/h. 18% chance of drizzle throughout the day. NightPartly cloudy, with a low around 65°F18°C. Breezy from the SW at 8 mph13 km/h. 20% chance of showers throughout the night.
	WednesdaySep 16	78°F26°C	61°F16°C	0.12 in3.1 mm· 14%	42%	Showers	SW 8 mph13 km/h
DayPartly cloudy and warm, with a high of 78°F26°C and morning low of 61°F16°C. Breezy from the SW at 9 to 10 mph14 to 15 km/h. 14% chance of drizzle throughout the day. NightPartly cloudy, with a low around 62°F17°C. Breezy from the SW at 7 to 8 mph12 to 13 km/h. 14% chance of showers 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