Current Conditions

Sycamore, Illinois

70°F21°C

Rain

Wind

E 4 mph6 km/h

Humidity

96%

Cloud Cover

55%

As of Thursday, August 13, 2026 at 3:15 AM CDT

Today's Outlook

Day

Overcast and warm, with a high of 77°F25°C and morning low of 70°F21°C. Breezy from the ESE at 6 to 7 mph9 to 12 km/h. 91% chance of rain around midday. Heavy, humid air.

Night

Mostly cloudy, with a low around 70°F21°C. Light wind from the E around 4 mph7 km/h. 82% chance of rain in the evening.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Rain	High 77°F25°C	Low 70°F21°C	Precip 0.33 in8.3 mm91%	Cloud 84%	Wind E 5 mph8 km/h	Thursday: Overcast and warm, with a high of 77°F25°C and morning low of 70°F21°C. Breezy from the ESE at 6 to 7 mph9 to 12 km/h. 91% chance of rain around midday. Heavy, humid air. Thursday Night: Mostly cloudy, with a low around 70°F21°C. Light wind from the E around 4 mph7 km/h. 82% chance of rain in the evening.
Light Rain	High 77°F25°C	Low 70°F21°C	Precip 0.39 in9.9 mm72%	Cloud 96%	Wind E 6 mph10 km/h	Friday: Overcast and warm, with a high of 77°F25°C and morning low of 70°F21°C. Breezy from the E at 7 to 8 mph11 to 13 km/h. 72% chance of light rain throughout the day. Humid. Friday Night: Overcast, with a low around 71°F22°C. Breezy from the ENE at 6 to 7 mph10 to 12 km/h. 61% chance of light rain throughout the night.
Rain	High 80°F27°C	Low 71°F22°C	Precip 0.64 in16.2 mm78%	Cloud 92%	Wind SE 6 mph9 km/h	Saturday: Overcast and warm, with a high of 80°F27°C and morning low of 72°F22°C. Breezy from the SSE at 6 to 7 mph10 to 11 km/h. 78% chance of rain throughout the day. Heavy, humid air. Saturday Night: Overcast, with a low around 71°F22°C. Breezy from the ESE at 5 to 7 mph9 to 11 km/h. 52% chance of light rain throughout the night.
Light Rain	High 83°F28°CFeels 88°F31°C	Low 73°F23°C	Precip 0.29 in7.4 mm48%	Cloud 82%	Wind WNW 7 mph12 km/h	Sunday: Overcast and warm, with a high of 83°F28°C and morning low of 74°F23°C. Breezy from the WNW at 8 to 9 mph13 to 14 km/h. 39% chance of light rain throughout the day. Heavy, humid air. Sunday Night: Mostly cloudy, with a low around 73°F23°C. Breezy from the WNW at 6 to 7 mph10 to 11 km/h. 48% chance of light rain throughout the night.
Drizzle	High 79°F26°C	Low 67°F19°C	Precip 0.02 in0.6 mm15%	Cloud 53%	Wind N 5 mph9 km/h	Monday: Mostly cloudy and warm, with a high of 79°F26°C and morning low of 67°F19°C. Light wind from the N around 6 mph10 km/h. 15% chance of drizzle around midday. Monday Night: Partly cloudy, with a low around 68°F20°C. Light wind from the N around 5 mph8 km/h.
Partly Cloudy	High 81°F27°C	Low 63°F17°C	Precip 0.02 in0.4 mm7%	Cloud 58%	Wind SSW 6 mph10 km/h	Tuesday: Mostly cloudy and warm, with a high of 81°F27°C and morning low of 63°F17°C. Breezy from the SSW 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 6 to 8 mph9 to 12 km/h.
Light Rain	High 82°F28°CFeels 85°F29°C	Low 70°F21°C	Precip 0.24 in6.2 mm41%	Cloud 71%	Wind SW 8 mph13 km/h	Wednesday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 70°F21°C. Breezy from the SW at 9 to 10 mph14 to 15 km/h. 41% chance of light rain throughout the day. Humid. Wednesday Night: Mostly cloudy, with a low around 70°F21°C. Breezy from the SW at 7 to 8 mph12 to 13 km/h. 33% chance of showers throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdayAug 13	77°F25°C	70°F21°C	0.33 in8.3 mm· 91%	84%	Rain	E 5 mph8 km/h
DayOvercast and warm, with a high of 77°F25°C and morning low of 70°F21°C. Breezy from the ESE at 6 to 7 mph9 to 12 km/h. 91% chance of rain around midday. Heavy, humid air. NightMostly cloudy, with a low around 70°F21°C. Light wind from the E around 4 mph7 km/h. 82% chance of rain in the evening.
	FridayAug 14	77°F25°C	70°F21°C	0.39 in9.9 mm· 72%	96%	Light Rain	E 6 mph10 km/h
DayOvercast and warm, with a high of 77°F25°C and morning low of 70°F21°C. Breezy from the E at 7 to 8 mph11 to 13 km/h. 72% chance of light rain throughout the day. Humid. NightOvercast, with a low around 71°F22°C. Breezy from the ENE at 6 to 7 mph10 to 12 km/h. 61% chance of light rain throughout the night.
	SaturdayAug 15	80°F27°C	71°F22°C	0.64 in16.2 mm· 78%	92%	Rain	SE 6 mph9 km/h
DayOvercast and warm, with a high of 80°F27°C and morning low of 72°F22°C. Breezy from the SSE at 6 to 7 mph10 to 11 km/h. 78% chance of rain throughout the day. Heavy, humid air. NightOvercast, with a low around 71°F22°C. Breezy from the ESE at 5 to 7 mph9 to 11 km/h. 52% chance of light rain throughout the night.
	SundayAug 16	83°F28°C Feels 88°F31°C	73°F23°C	0.29 in7.4 mm· 48%	82%	Light Rain	WNW 7 mph12 km/h
DayOvercast and warm, with a high of 83°F28°C and morning low of 74°F23°C. Breezy from the WNW at 8 to 9 mph13 to 14 km/h. 39% chance of light rain throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 73°F23°C. Breezy from the WNW at 6 to 7 mph10 to 11 km/h. 48% chance of light rain throughout the night.
	MondayAug 17	79°F26°C	67°F19°C	0.02 in0.6 mm· 15%	53%	Drizzle	N 5 mph9 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 67°F19°C. Light wind from the N around 6 mph10 km/h. 15% chance of drizzle around midday. NightPartly cloudy, with a low around 68°F20°C. Light wind from the N around 5 mph8 km/h.
	TuesdayAug 18	81°F27°C	63°F17°C	0.02 in0.4 mm· 7%	58%	Partly Cloudy	SSW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 63°F17°C. Breezy from the SSW at 7 to 9 mph11 to 14 km/h. NightPartly cloudy, with a low around 63°F17°C. Breezy from the SSW at 6 to 8 mph9 to 12 km/h.
	WednesdayAug 19	82°F28°C Feels 85°F29°C	70°F21°C	0.24 in6.2 mm· 41%	71%	Light Rain	SW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 70°F21°C. Breezy from the SW at 9 to 10 mph14 to 15 km/h. 41% chance of light rain throughout the day. Humid. NightMostly cloudy, with a low around 70°F21°C. Breezy from the SW at 7 to 8 mph12 to 13 km/h. 33% chance of showers throughout the night.
	ThursdayAug 20	77°F25°C	65°F18°C	0.11 in2.8 mm· 15%	50%	Showers	NNW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 65°F18°C. Breezy from the NNW at 7 to 8 mph12 to 12 km/h. 15% chance of drizzle throughout the day. NightPartly cloudy, with a low around 66°F19°C. Breezy from the N at 6 to 7 mph10 to 11 km/h. 12% chance of showers throughout the night.
	FridayAug 21	77°F25°C	62°F17°C	0.11 in2.8 mm· 15%	48%	Showers	ENE 6 mph9 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 62°F17°C. Breezy from the W at 6 to 7 mph10 to 11 km/h. 15% chance of drizzle throughout the day. NightPartly cloudy, with a low around 62°F17°C. Light wind from the ENE around 5 mph9 km/h. 11% chance of showers throughout the night.
	SaturdayAug 22	79°F26°C	62°F17°C	0.05 in1.2 mm· 9%	39%	Clear	SW 6 mph9 km/h
DayPartly cloudy and warm, with a high of 79°F26°C and morning low of 62°F17°C. Breezy from the W at 6 to 7 mph10 to 11 km/h. NightPartly cloudy, with a low around 62°F17°C. Light wind from the SSE around 5 mph8 km/h.
	SundayAug 23	82°F28°C	63°F17°C	0.04 in1 mm· 8%	35%	Clear	SSW 6 mph10 km/h
DayPartly cloudy and warm, with a high of 82°F28°C and morning low of 63°F17°C. Breezy from the SW at 7 mph11 km/h. NightPartly cloudy, with a low around 63°F17°C. Light wind from the S around 5 mph9 km/h.
	MondayAug 24	82°F28°C	64°F18°C	0.05 in1.3 mm· 9%	39%	Clear	SSW 6 mph10 km/h
DayPartly cloudy and warm, with a high of 82°F28°C and morning low of 64°F18°C. Breezy from the SW at 7 to 8 mph11 to 13 km/h. NightPartly cloudy, with a low around 65°F18°C. Light wind from the S around 6 mph9 km/h.
	TuesdayAug 25	83°F28°C	64°F18°C	0.05 in1.3 mm· 9%	40%	Clear	SSW 6 mph10 km/h
DayPartly cloudy and warm, with a high of 83°F28°C and morning low of 64°F18°C. Breezy from the SW at 7 to 8 mph11 to 13 km/h. NightPartly cloudy, with a low around 65°F18°C. Light wind from the SSE around 6 mph9 km/h.
	WednesdayAug 26	82°F28°C	65°F18°C	0.05 in1.3 mm· 12%	42%	Drizzle	SW 6 mph10 km/h
DayPartly cloudy and warm, with a high of 82°F28°C and morning low of 65°F18°C. Breezy from the W at 7 mph11 km/h. 12% chance of drizzle throughout the day. NightPartly cloudy, with a low around 66°F19°C. Light wind from the SE around 6 mph10 km/h.
	ThursdayAug 27	82°F28°C	64°F18°C	0.06 in1.5 mm· 13%	44%	Drizzle	NE 6 mph10 km/h
DayPartly cloudy and warm, with a high of 82°F28°C and morning low of 64°F18°C. Breezy from the NNW at 7 to 8 mph11 to 12 km/h. 12% chance of drizzle throughout the day. NightPartly cloudy, with a low around 65°F18°C. Light wind from the ENE around 6 mph10 km/h. 13% chance of drizzle throughout the night.

Nearby Cities

DeKalb5 mi8 km Wasco15 mi24 km Huntley18 mi29 km St. Charles20 mi32 km South Elgin20 mi33 km Belvidere21 mi33 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: 41.9889°N, 88.6868°W·Elevation: 266m·Timezone: America/Chicago·Population: 17,712