Current Conditions

Crystal Lake, Illinois

55°F13°C

Partly Cloudy

Wind

NE 8 mph12 km/h

Humidity

87%

Cloud Cover

63%

As of Wednesday, September 23, 2026 at 6:16 AM CDT

Today's Outlook

Day

Mostly cloudy and mild, with a high of 64°F18°C and morning low of 55°F13°C. Breezy from the ENE at 10 to 11 mph16 to 18 km/h.

Night

Mostly cloudy, with a low around 56°F13°C. Breezy from the ENE at 7 to 8 mph12 to 13 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Partly Cloudy	High 64°F18°C	Low 55°F13°C	Precip 0 in0 mm—	Cloud 68%	Wind ENE 9 mph14 km/h	Wednesday: Mostly cloudy and mild, with a high of 64°F18°C and morning low of 55°F13°C. Breezy from the ENE at 10 to 11 mph16 to 18 km/h. Wednesday Night: Mostly cloudy, with a low around 56°F13°C. Breezy from the ENE at 7 to 8 mph12 to 13 km/h.
Partly Cloudy	High 67°F19°C	Low 55°F13°C	Precip 0 in0 mm—	Cloud 44%	Wind ENE 6 mph10 km/h	Thursday: Partly cloudy and mild, with a high of 67°F19°C and morning low of 55°F13°C. Breezy from the E at 7 to 8 mph11 to 12 km/h. Thursday Night: Partly cloudy, with a low around 55°F13°C. Light wind from the ENE around 6 mph9 km/h.
Drizzle	High 67°F19°C	Low 56°F13°C	Precip 0.01 in0.2 mm16%	Cloud 75%	Wind ENE 5 mph8 km/h	Friday: Mostly cloudy and mild, with a high of 67°F19°C and morning low of 58°F14°C. Light wind from the ENE around 5 mph8 km/h. 16% chance of drizzle in the morning. Friday Night: Mostly cloudy, with a low around 56°F13°C. Light wind from the ENE around 4 mph7 km/h.
Partly Cloudy	High 68°F20°C	Low 51°F11°C	Precip 0 in0 mm—	Cloud 55%	Wind E 5 mph8 km/h	Saturday: Mostly cloudy and warm, with a high of 68°F20°C and morning low of 51°F11°C. Light wind from the E around 5 mph9 km/h. Dry air. Saturday Night: Mostly cloudy, with a low around 53°F12°C. Light wind from the ENE around 5 mph8 km/h.
Partly Cloudy	High 70°F21°C	Low 50°F10°C	Precip 0 in0.1 mm3%	Cloud 51%	Wind NE 4 mph6 km/h	Sunday: Mostly cloudy and warm, with a high of 70°F21°C and morning low of 50°F10°C. Light wind from the NE around 4 mph6 km/h. Sunday Night: Partly cloudy, with a low around 52°F11°C. Light wind from the ENE around 4 mph7 km/h.
Clear	High 73°F23°C	Low 50°F10°C	Precip 0 in0 mm—	Cloud 25%	Wind NE 4 mph6 km/h	Monday: Mostly clear and warm, with a high of 73°F23°C and morning low of 50°F10°C. Light wind from the NNE around 3 mph5 km/h. Monday Night: Partly cloudy, with a low around 52°F11°C. Light wind from the ENE around 4 mph7 km/h.
Drizzle	High 73°F23°C	Low 52°F11°C	Precip 0.04 in0.9 mm18%	Cloud 71%	Wind SSE 6 mph9 km/h	Tuesday: Mostly cloudy and warm, with a high of 73°F23°C and morning low of 52°F11°C. Breezy from the S at 6 to 7 mph10 to 12 km/h. Tuesday Night: Mostly cloudy, with a low around 53°F12°C. Breezy from the SSE at 6 to 7 mph9 to 12 km/h. 18% chance of drizzle in the evening.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 23	64°F18°C	55°F13°C	0 in0 mm· —	68%	Partly Cloudy	ENE 9 mph14 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 55°F13°C. Breezy from the ENE at 10 to 11 mph16 to 18 km/h. NightMostly cloudy, with a low around 56°F13°C. Breezy from the ENE at 7 to 8 mph12 to 13 km/h.
	ThursdaySep 24	67°F19°C	55°F13°C	0 in0 mm· —	44%	Partly Cloudy	ENE 6 mph10 km/h
DayPartly cloudy and mild, with a high of 67°F19°C and morning low of 55°F13°C. Breezy from the E at 7 to 8 mph11 to 12 km/h. NightPartly cloudy, with a low around 55°F13°C. Light wind from the ENE around 6 mph9 km/h.
	FridaySep 25	67°F19°C	56°F13°C	0.01 in0.2 mm· 16%	75%	Drizzle	ENE 5 mph8 km/h
DayMostly cloudy and mild, with a high of 67°F19°C and morning low of 58°F14°C. Light wind from the ENE around 5 mph8 km/h. 16% chance of drizzle in the morning. NightMostly cloudy, with a low around 56°F13°C. Light wind from the ENE around 4 mph7 km/h.
	SaturdaySep 26	68°F20°C	51°F11°C	0 in0 mm· —	55%	Partly Cloudy	E 5 mph8 km/h
DayMostly cloudy and warm, with a high of 68°F20°C and morning low of 51°F11°C. Light wind from the E around 5 mph9 km/h. Dry air. NightMostly cloudy, with a low around 53°F12°C. Light wind from the ENE around 5 mph8 km/h.
	SundaySep 27	70°F21°C	50°F10°C	0 in0.1 mm· 3%	51%	Partly Cloudy	NE 4 mph6 km/h
DayMostly cloudy and warm, with a high of 70°F21°C and morning low of 50°F10°C. Light wind from the NE around 4 mph6 km/h. NightPartly cloudy, with a low around 52°F11°C. Light wind from the ENE around 4 mph7 km/h.
	MondaySep 28	73°F23°C	50°F10°C	0 in0 mm· —	25%	Clear	NE 4 mph6 km/h
DayMostly clear and warm, with a high of 73°F23°C and morning low of 50°F10°C. Light wind from the NNE around 3 mph5 km/h. NightPartly cloudy, with a low around 52°F11°C. Light wind from the ENE around 4 mph7 km/h.
	TuesdaySep 29	73°F23°C	52°F11°C	0.04 in0.9 mm· 18%	71%	Drizzle	SSE 6 mph9 km/h
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 52°F11°C. Breezy from the S at 6 to 7 mph10 to 12 km/h. NightMostly cloudy, with a low around 53°F12°C. Breezy from the SSE at 6 to 7 mph9 to 12 km/h. 18% chance of drizzle in the evening.
	WednesdaySep 30	69°F20°C	59°F15°C	0.36 in9.1 mm· 42%	84%	Light Rain	S 8 mph13 km/h
DayOvercast and warm, with a high of 69°F20°C and morning low of 59°F15°C. Breezy from the S at 9 mph14 km/h. 40% chance of light rain throughout the day. NightOvercast, with a low around 60°F16°C. Breezy from the S at 8 mph12 km/h. 42% chance of light rain throughout the night.
	ThursdayOct 1	67°F20°C	57°F14°C	0.22 in5.5 mm· 35%	72%	Light Rain	W 8 mph13 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 57°F14°C. Breezy from the W at 9 to 10 mph14 to 15 km/h. 35% chance of light rain throughout the day. NightMostly cloudy, with a low around 59°F15°C. Breezy from the WSW at 8 mph12 km/h. 34% chance of light rain throughout the night.
	FridayOct 2	67°F20°C	55°F13°C	0.18 in4.6 mm· 25%	63%	Showers	SSW 8 mph13 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 55°F13°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 56°F13°C. Breezy from the SSW at 7 to 8 mph12 to 12 km/h. 25% chance of showers throughout the night.
	SaturdayOct 3	67°F20°C	55°F13°C	0.09 in2.2 mm· 23%	70%	Drizzle	WSW 8 mph12 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 55°F13°C. Breezy from the WSW at 8 to 9 mph13 to 15 km/h. 23% chance of drizzle throughout the day. NightMostly cloudy, with a low around 56°F13°C. Breezy from the SW at 7 to 8 mph12 to 13 km/h. 15% chance of drizzle throughout the night.
	SundayOct 4	64°F18°C	52°F11°C	0.08 in2 mm· 18%	58%	Drizzle	W 9 mph14 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 52°F11°C. Breezy from the W at 10 to 11 mph16 to 17 km/h. 15% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 54°F12°C. Breezy from the W at 8 mph13 km/h. 18% chance of drizzle throughout the night.
	MondayOct 5	63°F17°C	50°F10°C Feels 47°F8°C	0.11 in2.9 mm· 16%	54%	Drizzle	W 9 mph14 km/h
DayMostly cloudy and mild, with a high of 63°F17°C and morning low of 50°F10°C. Breezy from the W at 9 to 10 mph15 to 17 km/h. 16% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 51°F11°C. Breezy from the W at 8 mph13 km/h. 14% chance of drizzle throughout the night.
	TuesdayOct 6	62°F17°C	48°F9°C Feels 44°F7°C	0.09 in2.2 mm· 14%	49%	Drizzle	WNW 8 mph13 km/h
DayMostly cloudy and mild, with a high of 62°F17°C and morning low of 48°F9°C. Breezy from the WNW at 9 to 10 mph14 to 15 km/h. 11% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 50°F10°C. Breezy from the WNW at 7 to 8 mph12 to 13 km/h. 14% chance of drizzle throughout the night.
	WednesdayOct 7	63°F17°C	47°F8°C Feels 43°F6°C	0.09 in2.2 mm· 14%	42%	Drizzle	WNW 8 mph13 km/h
DayPartly cloudy and mild, with a high of 63°F17°C and morning low of 47°F8°C. Breezy from the WNW at 9 to 10 mph14 to 15 km/h. 14% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 48°F9°C. Breezy from the W at 7 to 8 mph12 to 12 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

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