Current Conditions

Crystal Lake, Illinois

81°F27°C

Drizzle

Feels like86°F30°C

Wind

SW 5 mph9 km/h

Humidity

77%

Cloud Cover

13%

As of Wednesday, September 2, 2026 at 9:03 PM CDT

Today's Outlook

Night

Partly cloudy, with a low around 77°F25°C. Light wind from the S around 6 mph9 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Drizzle	High 89°F32°CFeels 95°F35°C	Low 75°F24°C	Precip 0.03 in0.8 mm21%	Cloud 46%	Wind SSW 6 mph9 km/h	Thursday: Mostly cloudy and hot, with a high of 89°F32°C and morning low of 75°F24°C — feels like 95°F35°C. Light wind from the WSW around 5 mph9 km/h. 21% chance of drizzle around midday. Heavy, humid air. Thursday Night: Partly cloudy, with a low around 77°F25°C. Light wind from the S around 6 mph9 km/h.
Showers	High 89°F32°CFeels 96°F36°C	Low 74°F23°C	Precip 0.09 in2.3 mm26%	Cloud 59%	Wind SE 6 mph10 km/h	Friday: Mostly cloudy and hot, with a high of 89°F32°C and morning low of 74°F23°C — feels like 97°F36°C. Breezy from the SSE at 6 to 7 mph10 to 11 km/h. 16% chance of drizzle in the morning. Heat risk in the afternoon. Friday Night: Partly cloudy, with a low around 75°F24°C. Light wind from the ESE around 6 mph9 km/h. 26% chance of showers throughout the night.
Showers	High 83°F28°CFeels 88°F31°C	Low 72°F22°C	Precip 0.13 in3.3 mm29%	Cloud 55%	Wind ENE 6 mph10 km/h	Saturday: Mostly cloudy and warm, with a high of 83°F28°C and morning low of 73°F23°C. Breezy from the ENE at 6 to 8 mph10 to 12 km/h. 28% chance of drizzle throughout the day. Heavy, humid air. Saturday Night: Partly cloudy, with a low around 72°F22°C. Breezy from the ENE at 6 to 7 mph10 to 11 km/h. 29% chance of showers overnight.
Partly Cloudy	High 81°F27°C	Low 69°F21°C	Precip 0.02 in0.5 mm8%	Cloud 68%	Wind E 5 mph9 km/h	Sunday: Mostly cloudy and warm, with a high of 81°F27°C and morning low of 69°F21°C. Light wind from the ESE around 6 mph9 km/h. Humid. Sunday Night: Mostly cloudy, with a low around 70°F21°C. Light wind from the E around 5 mph9 km/h.
Partly Cloudy	High 82°F28°C	Low 68°F20°C	Precip 0.02 in0.5 mm6%	Cloud 62%	Wind SE 6 mph9 km/h	Monday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 68°F20°C. Breezy from the SE at 6 to 7 mph9 to 11 km/h. Monday Night: Mostly cloudy, with a low around 68°F20°C. Light wind from the ESE around 6 mph9 km/h.
Drizzle	High 88°F31°C	Low 68°F20°C	Precip 0.03 in0.8 mm10%	Cloud 61%	Wind S 8 mph13 km/h	Tuesday: Mostly cloudy and hot, with a high of 88°F31°C and morning low of 68°F20°C. Breezy from the S at 9 to 10 mph14 to 16 km/h. 10% chance of drizzle throughout the day. Tuesday Night: Mostly cloudy, with a low around 69°F21°C. Breezy from the SSE at 8 to 10 mph13 to 16 km/h.
Drizzle	High 91°F33°CFeels 96°F35°C	Low 75°F24°C	Precip 0.06 in1.4 mm14%	Cloud 46%	Wind SW 9 mph15 km/h	Wednesday: Partly cloudy and hot, with a high of 91°F33°C and morning low of 75°F24°C. Breezy from the SW at 10 to 11 mph15 to 17 km/h. 13% chance of drizzle in the morning. Heat risk in the afternoon. Wednesday Night: Partly cloudy, with a low around 76°F24°C. Breezy from the SSW at 9 to 10 mph14 to 16 km/h. 14% chance of drizzle throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdaySep 3	89°F32°C Feels 95°F35°C	75°F24°C	0.03 in0.8 mm· 21%	46%	Drizzle	SSW 6 mph9 km/h
DayMostly cloudy and hot, with a high of 89°F32°C and morning low of 75°F24°C — feels like 95°F35°C. Light wind from the WSW around 5 mph9 km/h. 21% chance of drizzle around midday. Heavy, humid air. NightPartly cloudy, with a low around 77°F25°C. Light wind from the S around 6 mph9 km/h.
	FridaySep 4	89°F32°C Feels 96°F36°C	74°F23°C	0.09 in2.3 mm· 26%	59%	Showers	SE 6 mph10 km/h
DayMostly cloudy and hot, with a high of 89°F32°C and morning low of 74°F23°C — feels like 97°F36°C. Breezy from the SSE at 6 to 7 mph10 to 11 km/h. 16% chance of drizzle in the morning. Heat risk in the afternoon. NightPartly cloudy, with a low around 75°F24°C. Light wind from the ESE around 6 mph9 km/h. 26% chance of showers throughout the night.
	SaturdaySep 5	83°F28°C Feels 88°F31°C	72°F22°C	0.13 in3.3 mm· 29%	55%	Showers	ENE 6 mph10 km/h
DayMostly cloudy and warm, with a high of 83°F28°C and morning low of 73°F23°C. Breezy from the ENE at 6 to 8 mph10 to 12 km/h. 28% chance of drizzle throughout the day. Heavy, humid air. NightPartly cloudy, with a low around 72°F22°C. Breezy from the ENE at 6 to 7 mph10 to 11 km/h. 29% chance of showers overnight.
	SundaySep 6	81°F27°C	69°F21°C	0.02 in0.5 mm· 8%	68%	Partly Cloudy	E 5 mph9 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 69°F21°C. Light wind from the ESE around 6 mph9 km/h. Humid. NightMostly cloudy, with a low around 70°F21°C. Light wind from the E around 5 mph9 km/h.
	MondaySep 7	82°F28°C	68°F20°C	0.02 in0.5 mm· 6%	62%	Partly Cloudy	SE 6 mph9 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 68°F20°C. Breezy from the SE at 6 to 7 mph9 to 11 km/h. NightMostly cloudy, with a low around 68°F20°C. Light wind from the ESE around 6 mph9 km/h.
	TuesdaySep 8	88°F31°C	68°F20°C	0.03 in0.8 mm· 10%	61%	Drizzle	S 8 mph13 km/h
DayMostly cloudy and hot, with a high of 88°F31°C and morning low of 68°F20°C. Breezy from the S at 9 to 10 mph14 to 16 km/h. 10% chance of drizzle throughout the day. NightMostly cloudy, with a low around 69°F21°C. Breezy from the SSE at 8 to 10 mph13 to 16 km/h.
	WednesdaySep 9	91°F33°C Feels 96°F35°C	75°F24°C	0.06 in1.4 mm· 14%	46%	Drizzle	SW 9 mph15 km/h
DayPartly cloudy and hot, with a high of 91°F33°C and morning low of 75°F24°C. Breezy from the SW at 10 to 11 mph15 to 17 km/h. 13% chance of drizzle in the morning. Heat risk in the afternoon. NightPartly cloudy, with a low around 76°F24°C. Breezy from the SSW at 9 to 10 mph14 to 16 km/h. 14% chance of drizzle throughout the night.
	ThursdaySep 10	83°F29°C	72°F22°C	0.23 in5.9 mm· 37%	54%	Showers	WSW 8 mph14 km/h
DayMostly cloudy and warm, with a high of 83°F29°C and morning low of 72°F22°C. Breezy from the W at 9 to 10 mph15 to 16 km/h. 29% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 72°F22°C. Breezy from the WSW at 8 to 9 mph12 to 14 km/h. 37% chance of showers throughout the night.
	FridaySep 11	80°F27°C	66°F19°C	0.19 in4.9 mm· 24%	53%	Showers	WSW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 66°F19°C. Breezy from the WSW at 8 to 9 mph13 to 14 km/h. 22% chance of showers throughout the day. NightPartly cloudy, with a low around 68°F20°C. Breezy from the SW at 7 mph11 km/h. 24% chance of showers throughout the night.
	SaturdaySep 12	81°F27°C	65°F18°C	0.13 in3.4 mm· 20%	52%	Showers	SSW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 65°F18°C. Breezy from the SSW at 8 to 9 mph13 to 15 km/h. 19% chance of drizzle throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the SSW at 7 to 8 mph12 to 12 km/h. 20% chance of showers throughout the night.
	SundaySep 13	79°F26°C	65°F18°C	0.18 in4.5 mm· 22%	57%	Showers	SSW 8 mph14 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 65°F18°C. Breezy from the SW at 9 to 10 mph15 to 16 km/h. 22% chance of showers throughout the day. NightMostly cloudy, with a low around 67°F19°C. Breezy from the SSW at 8 mph13 km/h. 21% chance of showers throughout the night.
	MondaySep 14	78°F26°C	64°F18°C	0.11 in2.7 mm· 17%	50%	Showers	WSW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 64°F18°C. Breezy from the WSW at 8 to 9 mph14 to 14 km/h. 15% chance of drizzle throughout the day. NightPartly cloudy, with a low around 65°F18°C. Breezy from the SW at 7 to 8 mph12 to 13 km/h. 17% chance of showers throughout the night.
	TuesdaySep 15	77°F25°C	61°F16°C	0.1 in2.5 mm· 16%	46%	Drizzle	SSE 8 mph12 km/h
DayPartly cloudy and warm, with a high of 77°F25°C and morning low of 61°F16°C. Breezy from the WSW at 8 to 9 mph13 to 15 km/h. 11% chance of drizzle throughout the day. NightPartly cloudy, with a low around 63°F17°C. Breezy from the ESE at 7 mph11 km/h. 16% chance of drizzle throughout the night.
	WednesdaySep 16	76°F25°C	61°F16°C	0.15 in3.8 mm· 18%	46%	Showers	S 8 mph12 km/h
DayPartly cloudy and warm, with a high of 76°F25°C and morning low of 61°F16°C. Breezy from the SSW at 8 to 9 mph13 to 14 km/h. 13% chance of showers throughout the day. NightPartly cloudy, with a low around 62°F17°C. Breezy from the SSE at 7 mph12 km/h. 18% chance of showers throughout the night.
	ThursdaySep 17	76°F24°C	59°F15°C	0.09 in2.3 mm· 13%	48%	Showers	SW 8 mph12 km/h
DayPartly cloudy and warm, with a high of 76°F24°C and morning low of 59°F15°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 61°F16°C. Breezy from the SSW at 7 mph11 km/h. 11% chance of showers 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

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Coordinates: 42.2411°N, 88.3162°W·Elevation: 279m·Timezone: America/Chicago·Population: 40,448