Current Conditions

Crystal Lake, Illinois

66°F19°C

Partly Cloudy

Wind

SSE 4 mph7 km/h

Humidity

64%

Cloud Cover

96%

As of Thursday, July 23, 2026 at 10:59 PM CDT

Today's Outlook

Night

Mostly cloudy, with a low around 62°F16°C. Light wind from the S around 5 mph7 km/h.

7-Day Forecast

Day	Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
FridayJul 24	Partly Cloudy	High 79°F26°C	Low 62°F16°C	Precip 0 in0 mm—	Cloud 64%	Wind S 4 mph7 km/h	Friday: Mostly cloudy and warm, with a high of 79°F26°C and morning low of 63°F17°C. Light wind from the S around 4 mph7 km/h. Friday Night: Mostly cloudy, with a low around 62°F16°C. Light wind from the S around 5 mph7 km/h.
SaturdayJul 25	Partly Cloudy	High 81°F27°C	Low 63°F17°C	Precip 0 in0.1 mm1%	Cloud 51%	Wind SW 6 mph10 km/h	Saturday: Mostly cloudy and warm, with a high of 81°F27°C and morning low of 65°F18°C. Breezy from the SW at 7 to 8 mph12 to 13 km/h. Saturday Night: Partly cloudy, with a low around 63°F17°C. Light wind from the SW around 5 mph9 km/h.
SundayJul 26	Showers	High 91°F33°CFeels 98°F37°C	Low 72°F22°C	Precip 0.06 in1.6 mm21%	Cloud 66%	Wind SW 6 mph10 km/h	Sunday: Mostly cloudy and hot, with a high of 91°F33°C and morning low of 73°F23°C — feels like 99°F37°C. Breezy from the SW at 6 to 8 mph10 to 13 km/h. 15% chance of drizzle in the morning. Heat risk in the afternoon. Sunday Night: Mostly cloudy, with a low around 72°F22°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. 21% chance of showers in the evening.
MondayJul 27	Rain	High 91°F33°CFeels 99°F37°C	Low 75°F24°C	Precip 0.35 in9 mm33%	Cloud 45%	Wind SW 6 mph10 km/h	Monday: Partly cloudy and hot, with a high of 91°F33°C and morning low of 75°F24°C — feels like 99°F37°C. Breezy from the SW at 7 mph11 km/h. 32% chance of showers throughout the day. Heat risk in the afternoon. Monday Night: Partly cloudy, with a low around 76°F24°C. Light wind from the SW around 6 mph10 km/h. 33% chance of rain throughout the night.
TuesdayJul 28	Drizzle	High 84°F29°C	Low 72°F22°C	Precip 0.06 in1.5 mm15%	Cloud 32%	Wind NNE 7 mph12 km/h	Tuesday: Partly cloudy and warm, with a high of 84°F29°C and morning low of 73°F23°C. Breezy from the NNE at 8 to 9 mph13 to 14 km/h. 10% chance of drizzle throughout the day. Humid. Tuesday Night: Partly cloudy, with a low around 72°F22°C. Breezy from the NNE at 7 mph11 km/h. 15% chance of drizzle overnight.
WednesdayJul 29	Clear	High 85°F29°C	Low 67°F19°C	Precip 0.03 in0.7 mm8%	Cloud 20%	Wind NE 6 mph9 km/h	Wednesday: Mostly clear and warm, with a high of 85°F29°C and morning low of 68°F20°C. Light wind from the NE around 6 mph9 km/h. Wednesday Night: Mostly clear, with a low around 67°F19°C. Light wind from the NE around 5 mph9 km/h.
ThursdayJul 30	Drizzle	High 87°F31°C	Low 67°F20°C	Precip 0.02 in0.6 mm10%	Cloud 26%	Wind SSE 5 mph8 km/h	Thursday: Partly cloudy and hot, with a high of 87°F31°C and morning low of 69°F20°C. Light wind from the S around 5 mph8 km/h. Thursday Night: Partly cloudy, with a low around 67°F20°C. Light wind from the SSE around 5 mph8 km/h. 10% chance of drizzle in the evening.

15-Day Forecast

	Day	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Condition	Wind (mph)
	FridayJul 24	79°F26°C	62°F16°C	0 in0 mm· —	64%	Partly Cloudy	S 4 mph7 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 63°F17°C. Light wind from the S around 4 mph7 km/h. NightMostly cloudy, with a low around 62°F16°C. Light wind from the S around 5 mph7 km/h.
	SaturdayJul 25	81°F27°C	63°F17°C	0 in0.1 mm· 1%	51%	Partly Cloudy	SW 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 SW at 7 to 8 mph12 to 13 km/h. NightPartly cloudy, with a low around 63°F17°C. Light wind from the SW around 5 mph9 km/h.
	SundayJul 26	91°F33°C Feels 98°F37°C	72°F22°C	0.06 in1.6 mm· 21%	66%	Showers	SW 6 mph10 km/h
DayMostly cloudy and hot, with a high of 91°F33°C and morning low of 73°F23°C — feels like 99°F37°C. Breezy from the SW at 6 to 8 mph10 to 13 km/h. 15% chance of drizzle in the morning. Heat risk in the afternoon. NightMostly cloudy, with a low around 72°F22°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. 21% chance of showers in the evening.
	MondayJul 27	91°F33°C Feels 99°F37°C	75°F24°C	0.35 in9 mm· 33%	45%	Rain	SW 6 mph10 km/h
DayPartly cloudy and hot, with a high of 91°F33°C and morning low of 75°F24°C — feels like 99°F37°C. Breezy from the SW at 7 mph11 km/h. 32% chance of showers throughout the day. Heat risk in the afternoon. NightPartly cloudy, with a low around 76°F24°C. Light wind from the SW around 6 mph10 km/h. 33% chance of rain throughout the night.
	TuesdayJul 28	84°F29°C	72°F22°C	0.06 in1.5 mm· 15%	32%	Drizzle	NNE 7 mph12 km/h
DayPartly cloudy and warm, with a high of 84°F29°C and morning low of 73°F23°C. Breezy from the NNE at 8 to 9 mph13 to 14 km/h. 10% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 72°F22°C. Breezy from the NNE at 7 mph11 km/h. 15% chance of drizzle overnight.
	WednesdayJul 29	85°F29°C	67°F19°C	0.03 in0.7 mm· 8%	20%	Clear	NE 6 mph9 km/h
DayMostly clear and warm, with a high of 85°F29°C and morning low of 68°F20°C. Light wind from the NE around 6 mph9 km/h. NightMostly clear, with a low around 67°F19°C. Light wind from the NE around 5 mph9 km/h.
	ThursdayJul 30	87°F31°C	67°F20°C	0.02 in0.6 mm· 10%	26%	Drizzle	SSE 5 mph8 km/h
DayPartly cloudy and hot, with a high of 87°F31°C and morning low of 69°F20°C. Light wind from the S around 5 mph8 km/h. NightPartly cloudy, with a low around 67°F20°C. Light wind from the SSE around 5 mph8 km/h. 10% chance of drizzle in the evening.
	FridayJul 31	88°F31°C	71°F22°C	0.09 in2.2 mm· 20%	45%	Showers	SW 6 mph9 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 71°F22°C. Breezy from the WSW at 6 to 7 mph10 to 11 km/h. 19% chance of drizzle throughout the day. NightPartly cloudy, with a low around 71°F22°C. Light wind from the SW around 6 mph9 km/h. 20% chance of showers in the evening.
	SaturdayAug 1	86°F30°C	71°F22°C	0.09 in2.3 mm· 20%	40%	Drizzle	NW 6 mph10 km/h
DayPartly cloudy and hot, with a high of 86°F30°C and morning low of 71°F22°C. Breezy from the NW at 6 to 7 mph10 to 11 km/h. 19% chance of drizzle throughout the day. NightPartly cloudy, with a low around 71°F22°C. Light wind from the W around 6 mph9 km/h. 20% chance of drizzle throughout the night.
	SundayAug 2	85°F30°C	69°F20°C	0.04 in1.1 mm· 17%	36%	Drizzle	N 6 mph10 km/h
DayPartly cloudy and warm, with a high of 85°F30°C and morning low of 69°F20°C. Breezy from the NNW at 7 mph11 km/h. 13% chance of drizzle in the afternoon. NightPartly cloudy, with a low around 69°F20°C. Light wind from the NE around 6 mph9 km/h. 17% chance of drizzle throughout the night.
	MondayAug 3	86°F30°C	68°F20°C	0.08 in2 mm· 13%	43%	Showers	S 7 mph11 km/h
DayPartly cloudy and warm, with a high of 86°F30°C and morning low of 68°F20°C. Breezy from the SSW at 7 to 9 mph12 to 14 km/h. NightPartly cloudy, with a low around 68°F20°C. Breezy from the S at 7 to 8 mph11 to 12 km/h. 13% chance of drizzle throughout the night.
	TuesdayAug 4	85°F30°C	70°F21°C	0.11 in2.9 mm· 20%	50%	Drizzle	SW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 85°F30°C and morning low of 70°F21°C. Breezy from the SW at 8 to 9 mph13 to 15 km/h. 20% chance of drizzle throughout the day. NightPartly cloudy, with a low around 70°F21°C. Breezy from the SSW at 7 to 8 mph12 to 12 km/h. 15% chance of drizzle throughout the night.
	WednesdayAug 5	84°F29°C	68°F20°C	0.07 in1.8 mm· 15%	46%	Drizzle	W 7 mph12 km/h
DayMostly cloudy and warm, with a high of 84°F29°C and morning low of 68°F20°C. Breezy from the W at 8 to 9 mph13 to 15 km/h. 11% chance of drizzle throughout the day. NightPartly cloudy, with a low around 69°F20°C. Breezy from the WSW at 7 mph11 km/h. 15% chance of drizzle throughout the night.
	ThursdayAug 6	83°F28°C	67°F19°C	0.07 in1.9 mm· 15%	43%	Drizzle	WSW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 83°F28°C and morning low of 67°F19°C. Breezy from the W at 8 mph12 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 67°F19°C. Breezy from the WSW at 7 mph11 km/h. 15% chance of drizzle throughout the night.
	FridayAug 7	84°F29°C	66°F19°C	0.07 in1.7 mm· 16%	41%	Drizzle	SW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 84°F29°C and morning low of 66°F19°C. Breezy from the WSW at 7 to 8 mph12 to 13 km/h. 16% chance of drizzle throughout the day. NightPartly cloudy, with a low around 66°F19°C. Breezy from the SW at 7 mph11 km/h. 14% chance of drizzle throughout the night.

Nearby Cities

Lake in the Hills4 mi7 km Cary4 mi7 km Algonquin5 mi9 km McHenry7 mi11 km Huntley8 mi12 km Woodstock8 mi14 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: 42.2411°N, 88.3162°W·Elevation: 279m·Timezone: America/Chicago·Population: 40,448