Current Conditions

Crystal Lake, Illinois

78°F26°C

Partly Cloudy

Wind

S 7 mph12 km/h

Humidity

58%

Cloud Cover

58%

As of Tuesday, September 8, 2026 at 6:37 PM CDT

Today's Outlook

Night

Mostly cloudy, with a low around 75°F24°C. Breezy from the S at 8 mph12 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Partly Cloudy	High 80°F27°C	Low 75°F24°C	Precip 0 in0.1 mm5%	Cloud 76%	Wind S 7 mph12 km/h	Tuesday: Overcast and warm, with a high of 80°F27°C. Breezy from the SSE at 7 to 10 mph12 to 16 km/h. Tuesday Night: Mostly cloudy, with a low around 75°F24°C. Breezy from the S at 8 mph12 km/h.
Rain	High 80°F27°C	Low 71°F22°C	Precip 0.58 in14.7 mm99%	Cloud 85%	Wind WSW 8 mph13 km/h	Wednesday: Overcast and warm, with a high of 80°F27°C and morning low of 71°F22°C. Breezy from the WSW at 9 mph14 km/h. 99% chance of rain throughout the day. Humid. Wednesday Night: Mostly cloudy, with a low around 71°F22°C. Breezy from the SW at 7 to 9 mph11 to 14 km/h. 78% chance of light rain overnight.
Partly Cloudy	High 77°F25°C	Low 63°F17°C	Precip 0.01 in0.2 mm3%	Cloud 60%	Wind NNE 5 mph8 km/h	Thursday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 65°F18°C. Light wind from the NNE around 5 mph8 km/h. Thursday Night: Partly cloudy, with a low around 63°F17°C. Light wind from the NNW around 5 mph8 km/h.
Clear	High 81°F27°C	Low 58°F15°C	Precip 0 in0 mm—	Cloud 14%	Wind SSE 5 mph9 km/h	Friday: Mostly clear and warm, with a high of 81°F27°C and morning low of 58°F15°C. Light wind from the SSE around 6 mph9 km/h. Friday Night: Mostly clear, with a low around 59°F15°C. Breezy from the SSE at 5 to 7 mph8 to 12 km/h.
Drizzle	High 83°F28°C	Low 65°F18°C	Precip 0.04 in1.1 mm20%	Cloud 44%	Wind WSW 8 mph12 km/h	Saturday: Mostly cloudy and warm, with a high of 83°F28°C and morning low of 65°F18°C. Breezy from the WSW at 8 to 10 mph14 to 15 km/h. 20% chance of drizzle around midday. Humid. Saturday Night: Partly cloudy, with a low around 65°F19°C. Breezy from the SW at 7 mph11 km/h. 19% chance of drizzle in the evening.
Drizzle	High 74°F23°C	Low 60°F15°C	Precip 0.04 in1.1 mm16%	Cloud 35%	Wind NNW 7 mph11 km/h	Sunday: Partly cloudy and warm, with a high of 74°F23°C and morning low of 60°F15°C. Breezy from the NNW at 7 mph12 km/h. 16% chance of drizzle in the afternoon. Dry air. Sunday Night: Partly cloudy, with a low around 61°F16°C. Breezy from the NNW at 6 to 7 mph10 to 11 km/h. 10% chance of drizzle in the evening.
Showers	High 76°F25°C	Low 58°F15°C	Precip 0.16 in4.1 mm27%	Cloud 59%	Wind SE 9 mph14 km/h	Monday: Mostly cloudy and warm, with a high of 76°F25°C and morning low of 58°F15°C. Breezy from the SE at 9 to 11 mph14 to 17 km/h. 27% chance of showers throughout the day. Monday Night: Mostly cloudy, with a low around 58°F15°C. Breezy from the SSE at 9 to 12 mph14 to 20 km/h. 19% chance of showers throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	TuesdaySep 8	80°F27°C	75°F24°C	0 in0.1 mm· 5%	76%	Partly Cloudy	S 7 mph12 km/h
DayOvercast and warm, with a high of 80°F27°C. Breezy from the SSE at 7 to 10 mph12 to 16 km/h. NightMostly cloudy, with a low around 75°F24°C. Breezy from the S at 8 mph12 km/h.
	WednesdaySep 9	80°F27°C	71°F22°C	0.58 in14.7 mm· 99%	85%	Rain	WSW 8 mph13 km/h
DayOvercast and warm, with a high of 80°F27°C and morning low of 71°F22°C. Breezy from the WSW at 9 mph14 km/h. 99% chance of rain throughout the day. Humid. NightMostly cloudy, with a low around 71°F22°C. Breezy from the SW at 7 to 9 mph11 to 14 km/h. 78% chance of light rain overnight.
	ThursdaySep 10	77°F25°C	63°F17°C	0.01 in0.2 mm· 3%	60%	Partly Cloudy	NNE 5 mph8 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 65°F18°C. Light wind from the NNE around 5 mph8 km/h. NightPartly cloudy, with a low around 63°F17°C. Light wind from the NNW around 5 mph8 km/h.
	FridaySep 11	81°F27°C	58°F15°C	0 in0 mm· —	14%	Clear	SSE 5 mph9 km/h
DayMostly clear and warm, with a high of 81°F27°C and morning low of 58°F15°C. Light wind from the SSE around 6 mph9 km/h. NightMostly clear, with a low around 59°F15°C. Breezy from the SSE at 5 to 7 mph8 to 12 km/h.
	SaturdaySep 12	83°F28°C	65°F18°C	0.04 in1.1 mm· 20%	44%	Drizzle	WSW 8 mph12 km/h
DayMostly cloudy and warm, with a high of 83°F28°C and morning low of 65°F18°C. Breezy from the WSW at 8 to 10 mph14 to 15 km/h. 20% chance of drizzle around midday. Humid. NightPartly cloudy, with a low around 65°F19°C. Breezy from the SW at 7 mph11 km/h. 19% chance of drizzle in the evening.
	SundaySep 13	74°F23°C	60°F15°C	0.04 in1.1 mm· 16%	35%	Drizzle	NNW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 74°F23°C and morning low of 60°F15°C. Breezy from the NNW at 7 mph12 km/h. 16% chance of drizzle in the afternoon. Dry air. NightPartly cloudy, with a low around 61°F16°C. Breezy from the NNW at 6 to 7 mph10 to 11 km/h. 10% chance of drizzle in the evening.
	MondaySep 14	76°F25°C	58°F15°C	0.16 in4.1 mm· 27%	59%	Showers	SE 9 mph14 km/h
DayMostly cloudy and warm, with a high of 76°F25°C and morning low of 58°F15°C. Breezy from the SE at 9 to 11 mph14 to 17 km/h. 27% chance of showers throughout the day. NightMostly cloudy, with a low around 58°F15°C. Breezy from the SSE at 9 to 12 mph14 to 20 km/h. 19% chance of showers throughout the night.
	TuesdaySep 15	80°F26°C	68°F20°C	0.17 in4.2 mm· 24%	72%	Light Rain	SW 10 mph17 km/h
DayMostly cloudy and warm, with a high of 80°F26°C and morning low of 68°F20°C. Breezy from the SW at 11 to 12 mph18 to 19 km/h. 24% chance of light rain throughout the day. NightMostly cloudy, with a low around 68°F20°C. Breezy from the SSW at 10 to 13 mph16 to 21 km/h. 23% chance of light rain throughout the night.
	WednesdaySep 16	75°F24°C	62°F17°C	0.18 in4.5 mm· 26%	65%	Showers	E 7 mph11 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 62°F17°C. Breezy from the E at 7 mph11 km/h. 21% chance of light rain throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the ENE at 7 mph11 km/h. 26% chance of showers throughout the night.
	ThursdaySep 17	80°F27°C	66°F19°C	0.32 in8.2 mm· 39%	59%	Showers	S 9 mph14 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 66°F19°C. Breezy from the SSW at 9 to 10 mph15 to 17 km/h. 39% chance of showers throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the S at 8 to 9 mph13 to 14 km/h. 32% chance of showers throughout the night.
	FridaySep 18	76°F24°C	64°F18°C	0.2 in5.1 mm· 22%	49%	Showers	W 8 mph14 km/h
DayMostly cloudy and warm, with a high of 76°F24°C and morning low of 64°F18°C. Breezy from the W at 9 mph14 km/h. 22% chance of showers throughout the day. NightPartly cloudy, with a low around 64°F18°C. Breezy from the WSW at 8 to 9 mph13 to 15 km/h. 21% chance of showers throughout the night.
	SaturdaySep 19	71°F22°C	59°F15°C	0.22 in5.7 mm· 31%	58%	Showers	NW 8 mph13 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 59°F15°C. Breezy from the WNW at 8 to 9 mph14 to 14 km/h. 31% chance of showers throughout the day. NightMostly cloudy, with a low around 61°F16°C. Breezy from the NW at 7 to 8 mph12 to 12 km/h. 27% chance of showers throughout the night.
	SundaySep 20	68°F20°C	55°F13°C	0.12 in3.1 mm· 21%	55%	Showers	NNW 8 mph12 km/h
DayMostly cloudy and mild, with a high of 68°F20°C and morning low of 55°F13°C. Breezy from the NNW at 8 to 9 mph13 to 15 km/h. 19% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 57°F14°C. Breezy from the N at 7 mph12 km/h. 21% chance of showers throughout the night.
	MondaySep 21	68°F20°C	52°F11°C	0.08 in2.1 mm· 13%	49%	Showers	NNE 7 mph12 km/h
DayMostly cloudy and mild, with a high of 68°F20°C and morning low of 52°F11°C. Breezy from the N at 8 to 9 mph13 to 14 km/h. 11% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 54°F12°C. Breezy from the NNE at 7 mph11 km/h. 13% chance of showers throughout the night.
	TuesdaySep 22	70°F21°C	52°F11°C	0.09 in2.3 mm· 12%	48%	Drizzle	SE 7 mph12 km/h
DayMostly cloudy and warm, with a high of 70°F21°C and morning low of 52°F11°C. Breezy from the SE at 8 mph12 km/h. 11% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 53°F12°C. Breezy from the ESE at 7 mph11 km/h. 12% 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

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