Crystal Lake, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Crystal Lake, IL in one place.
Sunny, with a high near 93.
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: Jul 11, 2026 11:51 PM CDT.
The active forecast window currently covers Jul 14 to Jul 18, 2026 for Crystal Lake, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 14 to Jul 18, 2026
- Latest sync
- Jul 11, 2026 11:51 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Crystal Lake
Tuesday looks like the warmest upcoming period in Crystal Lake at 93 degrees F.
Friday Night is the coolest period ahead with temperatures near 69 degrees F.
The strongest winds are forecast for Friday at about 0 to 10 mph WSW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 11, 2026 11:51 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 sourceExtended Forecast
Clear, with a low around 72.
Sunny, with a high near 93.
Mostly clear, with a low around 70.
Sunny, with a high near 90.
Partly cloudy, with a low around 70.
A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 89.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 69.
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jul 14
|
Sunny
|
93°F |
0 to 5 mph
NW
|
|
Tuesday Night
Jul 14
|
Clear
|
72°F |
0 to 5 mph
WNW
|
|
Wednesday
Jul 15
|
Sunny
|
93°F |
0 to 5 mph
WNW
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
70°F |
0 to 5 mph
SW
|
|
Thursday
Jul 16
|
Sunny
|
90°F |
0 to 5 mph
WSW
|
|
Thursday Night
Jul 16
|
Partly Cloudy
|
70°F |
0 to 5 mph
SW
|
|
Friday
Jul 17
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
89°F |
0 to 10 mph
WSW
|
|
Friday Night
Jul 17
|
Slight Chance Showers And Thunderstorms
|
69°F |
5 to 10 mph
SW
|
|
Saturday
Jul 18
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
88°F |
5 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Crystal Lake.
