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 80. West wind 5 to 15 mph, with gusts as high as 25 mph.
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: Oct 12, 2026 12:22 AM CDT.
The active forecast window currently covers Oct 13 to Oct 18, 2026 for Crystal Lake, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 13 to Oct 18, 2026
- Latest sync
- Oct 12, 2026 12:22 AM 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 80 degrees F.
Friday Night is the coolest period ahead with temperatures near 35 degrees F.
The strongest winds are forecast for Friday at about 10 to 20 mph NW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 12, 2026 12:22 AM CDT
- Coverage
- 6 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
Rain showers likely after 7pm. Partly cloudy, with a low around 58. North northwest wind 0 to 5 mph. Chance of precipitation is 60%.
Rain showers likely before 1pm. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.
A slight chance of rain showers after 1am. Mostly cloudy, with a low around 53.
Rain showers likely. Mostly cloudy, with a high near 66.
Rain showers likely. Mostly cloudy, with a low around 48.
A slight chance of rain showers before 7am. Mostly cloudy, with a high near 58.
Mostly cloudy, with a low around 35.
Mostly sunny, with a high near 53.
Mostly clear, with a low around 36.
Sunny, with a high near 60.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Oct 13
|
Sunny
|
80°F |
5 to 15 mph
W
|
|
Tuesday Night
Oct 13
|
Rain Showers Likely
|
58°F |
0 to 5 mph
NNW
|
|
Wednesday
Oct 14
|
Rain Showers Likely
|
69°F |
5 to 10 mph
NE
|
|
Wednesday Night
Oct 14
|
Mostly Cloudy then Slight Chance Rain Showers
|
53°F |
5 to 10 mph
NE
|
|
Thursday
Oct 15
|
Rain Showers Likely
|
66°F |
5 to 10 mph
E
|
|
Thursday Night
Oct 15
|
Rain Showers Likely
|
48°F |
5 to 10 mph
NNE
|
|
Friday
Oct 16
|
Slight Chance Rain Showers then Mostly Cloudy
|
58°F |
10 to 20 mph
NW
|
|
Friday Night
Oct 16
|
Mostly Cloudy
|
35°F |
5 to 15 mph
NW
|
|
Saturday
Oct 17
|
Mostly Sunny
|
53°F |
5 mph
NW
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
36°F |
0 to 5 mph
W
|
|
Sunday
Oct 18
|
Sunny
|
60°F |
5 to 15 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Crystal Lake.
