Current Weather
5:03 AM
61°F
Mostly clear
RealFeel® 62°
Cool
RealFeel®
62°
Wind
NE 2 mph
Wind Gusts
6 mph
Humidity
98%
Indoor Humidity
77% (Slightly Humid)
Dew Point
61° F
Pressure
↔ 30.27 in
Cloud Cover
18%
Visibility
10 mi
Cloud Ceiling
13600 ft
Day
9/18
72°Hi
RealFeel®
72°
Pleasant
RealFeel Shade™
69°
Pleasant
Intervals of clouds and sunshine with a shower in spots this afternoon
Max UV Index3.0 (Moderate)
AccuLumen Brightness Index™6 (Medium)
WindE 9 mph
Wind Gusts21 mph
Probability of Precipitation49%
Probability of Thunderstorms10%
Precipitation0.01 in
Rain Amount0.01 in
Total Hours of Precipitation0.5
Total Hours of Rain0.5
Cloud Cover70%
Night
9/18
63°Lo
RealFeel®
55°
Cool
Overcast with a couple of heavy thunderstorms beginning late evening; downpours can reduce visibility and cause ponding on streets and highways
WindESE 8 mph
Wind Gusts15 mph
Probability of Precipitation99%
Probability of Thunderstorms89%
Precipitation0.97 in
Rain Amount0.97 in
Total Hours of Precipitation4
Total Hours of Rain4
Cloud Cover95%
Sun & Moon
12 hrs 22 mins
Rise
6:36 AM
Set
6:58 PM
First Quarter
Rise
2:38 PM
Set
11:03 PM
Temperature History
9/18High
Low
Forecast
72°
63°
Average
74°
53°
Last Year
88°
56°
Record
88°
2025
41°
2012
Current Weather Conditions in Crystal Lake
Crystal Lake, Illinois is currently Mostly clear with a temperature of 61°. The current RealFeel® Temperature is 62° (Cool) based on observed conditions including 98% humidity, 18% cloud cover, a UV index of 0, and winds of 2 mph. In shade, the RealFeel Shade™ is 62°. AccuWeather's MinuteCast® provides minute-by-minute precipitation forecasts for Crystal Lake, powered by forecasting systems and proprietary technology developed by AccuWeather meteorologists since 1962.
