NimbocastCrystal Lake, IL Weather
Live radar, hourly and 7-day forecast, and National Weather Service alerts for Crystal Lake, McHenry County, Illinois.
Updated Jul 29, 2026, 2:18 PM local time · Radar refreshes every 5 minutes
☀️
Crystal Lake
80°F
Wind 9 mph
Humidity 37%
Cloud cover 0%
UV index 7
Alerts 0
Active alerts
✓
No active National Weather Service alerts for Crystal Lake, IL.
Crystal Lake weather radar
Light
Heavy
Next 24 hours
Now
☀️
80°F
3 PM
☀️
81°F
4 PM
☀️
81°F
5 PM
☀️
80°F
6 PM
☀️
79°F
7 PM
☀️
77°F
8 PM
☀️
72°F
9 PM
☀️
69°F
10 PM
☀️
67°F
11 PM
☀️
66°F
12 AM
☀️
64°F
1 AM
☀️
63°F
2 AM
☀️
62°F
3 AM
☀️
61°F
4 AM
☀️
60°F
5 AM
☀️
59°F
6 AM
☀️
58°F
7 AM
☀️
62°F
8 AM
☀️
69°F
9 AM
☀️
75°F
10 AM
☀️
79°F
11 AM
🌤️
82°F
12 PM
🌤️
85°F
1 PM
☁️
87°F
7-day forecast
Today
Jul 29
☀️
81°F
59°F
Thu
Jul 30
☁️
88°F
58°F
Fri
Jul 31
🌧️
77°F
63°F
72%
Sat
Aug 1
🌧️
67°F
63°F
77%
Sun
Aug 2
☁️
76°F
58°F
8%
Mon
Aug 3
☀️
79°F
57°F
3%
Tue
Aug 4
☀️
79°F
61°F
6%
Weather near Crystal Lake
4 mi
Lake in the Hills, IL4 mi
Cary, IL5 mi
Algonquin, IL7 mi
McHenry, IL8 mi
Huntley, IL8 mi
Woodstock, IL9 mi
Carpentersville, IL12 mi
Lake Zurich, IL
Alerts are relayed from the National Weather Service and may lag
the official source. In a life-threatening situation always follow
weather.gov and local emergency
broadcasts.