Crystal Lake, IL Weather Forecast

Local 7-day forecast

78°

Sunny

Track current conditions, temperature changes, wind, and the full daily outlook for Crystal Lake, IL in one place.

Saturday, May 30, 2026

Wind: 5 to 15 mph ENE

Saturday

Sunny, with a high near 78.

Local 7-day forecast

Local Weather Overview

This forecast page for Crystal Lake, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: May 27, 2026 10:10 PM CDT.

The active forecast window currently covers May 30 to Jun 3, 2026 for Crystal Lake, IL.

Page Snapshot

Page focus: city weather
Forecast window: May 30 to Jun 3, 2026
Latest sync: May 27, 2026 10:10 PM CDT
Forecast office: LOT
Source: NOAA / NWS

Next High

78°F

Saturday

Next Low

54°F

Saturday Night

Rain Outlook

Periods mentioning precipitation

Windiest

5 to 15 mph

Saturday

Daily Outlook

Today

May 30

Sunny

78 °F

/ 54°F

Wind 5 to 15 mph

Sun

May 31

Mostly Sunny

80 °F

/ 55°F

Wind 5 mph

Mon

Jun 1

Mostly Sunny

80 °F

/ 54°F

Wind 0 to 15 mph

Tue

Jun 2

Sunny

78 °F

/ 54°F

Wind 5 to 10 mph

Wed

Jun 3

Sunny

82 °F

Wind 5 to 10 mph

This Week in Crystal Lake

Wednesday looks like the warmest upcoming period in Crystal Lake at 82 degrees F.

Saturday Night is the coolest period ahead with temperatures near 54 degrees F.

The strongest winds are forecast for Saturday at about 5 to 15 mph ENE.

The forecast from May 30 through Jun 3 stays mostly dry.

Forecast Details

Last updated: May 27, 2026 10:10 PM CDT
Coverage: 5 days
Time zone: America/Chicago
Forecast office: LOT
Radar station: KLOT

Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.

Open NOAA source

Extended Forecast

Saturday Night

May 30

54°F

Mostly Clear

5 to 15 mph E

Mostly clear, with a low around 54.

Sunday

May 31

80°F

Mostly Sunny

5 mph ESE

Mostly sunny, with a high near 80.

Sunday Night

May 31

55°F

Partly Cloudy

0 to 5 mph NE

Partly cloudy, with a low around 55.

Monday

Jun 1

80°F

Mostly Sunny

0 to 15 mph NE

Mostly sunny, with a high near 80.

Monday Night

Jun 1

54°F

Mostly Clear

5 to 15 mph NE

Mostly clear, with a low around 54.

Tuesday

Jun 2

78°F

Sunny

5 to 10 mph NE

Sunny, with a high near 78.

Tuesday Night

Jun 2

54°F

Clear

5 to 10 mph NNE

Clear, with a low around 54.

Wednesday

Jun 3

82°F

Sunny

5 to 10 mph NE

Sunny, with a high near 82.

Detailed Forecast

Period	Conditions	Temp	Wind	Details
Saturday May 30	Sunny	78°F	5 to 15 mph ENE	Sunny, with a high near 78.
Saturday Night May 30	Mostly Clear	54°F	5 to 15 mph E	Mostly clear, with a low around 54.
Sunday May 31	Mostly Sunny	80°F	5 mph ESE	Mostly sunny, with a high near 80.
Sunday Night May 31	Partly Cloudy	55°F	0 to 5 mph NE	Partly cloudy, with a low around 55.
Monday Jun 1	Mostly Sunny	80°F	0 to 15 mph NE	Mostly sunny, with a high near 80.
Monday Night Jun 1	Mostly Clear	54°F	5 to 15 mph NE	Mostly clear, with a low around 54.
Tuesday Jun 2	Sunny	78°F	5 to 10 mph NE	Sunny, with a high near 78.
Tuesday Night Jun 2	Clear	54°F	5 to 10 mph NNE	Clear, with a low around 54.
Wednesday Jun 3	Sunny	82°F	5 to 10 mph NE	Sunny, with a high near 82.

Nearby Forecasts

Explore weather pages for nearby cities and major places around Crystal Lake.

Region Links

McHenry County weather

County forecast page

Illinois weather

Statewide weather overview

United States weather

National weather entry point

Crystal Lake IL Downtown1 image

Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.