Crystal Lake, IA Weather Forecast
Local 7-day forecast
Areas Of Fog
Track current conditions, temperature changes, wind, and the full daily outlook for Crystal Lake, IA in one place.
Areas of fog and a chance of rain showers before 1pm. Cloudy, with a high near 73. North northeast wind 2 to 6 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Crystal Lake, IA 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: Sep 17, 2026 8:21 AM CDT.
The active forecast window currently covers Sep 17 to Sep 23, 2026 for Crystal Lake, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 23, 2026
- Latest sync
- Sep 17, 2026 8:21 AM CDT
- Forecast office
- DMX
- Source
- NOAA / NWS
Daily Outlook
This Week in Crystal Lake
Today looks like the warmest upcoming period in Crystal Lake at 73 degrees F.
Monday Night is the coolest period ahead with temperatures near 48 degrees F.
The strongest winds are forecast for Friday at about 12 to 18 mph ESE.
Precipitation is mentioned in 12 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 17, 2026 8:21 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- DMX
- Radar station
- KDMX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Rain showers likely after 3am. Mostly cloudy. Low around 58, with temperatures rising to around 60 overnight. East wind 6 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Rain showers likely before 7am, then showers and thunderstorms between 7am and noon, then a chance of showers and thunderstorms between noon and 3pm, then showers and thunderstorms likely. Cloudy, with a high near 73. East southeast wind 12 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy. Low around 63, with temperatures rising to around 66 overnight. Southeast wind 7 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Showers and thunderstorms likely. Mostly cloudy, with a high near 72. Northwest wind 6 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
A chance of rain showers before 7pm. Mostly cloudy, with a low around 55. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers after 7am. Mostly cloudy, with a high near 64. Chance of precipitation is 30%.
A chance of rain showers. Mostly cloudy, with a low around 51. Chance of precipitation is 50%.
Rain showers likely. Mostly cloudy, with a high near 59. Chance of precipitation is 60%.
A chance of rain showers. Mostly cloudy, with a low around 48. Chance of precipitation is 50%.
A slight chance of rain showers before 7am. Mostly cloudy, with a high near 63.
Mostly cloudy, with a low around 48.
Partly sunny, with a high near 69.
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 52.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Sep 17
|
Areas Of Fog
|
73°F |
2 to 6 mph
NNE
|
|
Tonight
Sep 17
|
Mostly Cloudy then Rain Showers Likely
|
58°F |
6 to 10 mph
E
|
|
Friday
Sep 18
|
Showers And Thunderstorms then Chance Showers And Thunderstorms
|
73°F |
12 to 18 mph
ESE
|
|
Friday Night
Sep 18
|
Showers And Thunderstorms
|
63°F |
7 to 17 mph
SE
|
|
Saturday
Sep 19
|
Showers And Thunderstorms Likely
|
72°F |
6 to 10 mph
NW
|
|
Saturday Night
Sep 19
|
Chance Rain Showers then Mostly Cloudy
|
55°F |
10 mph
NNE
|
|
Sunday
Sep 20
|
Chance Rain Showers
|
64°F |
13 mph
NE
|
|
Sunday Night
Sep 20
|
Chance Rain Showers
|
51°F |
12 mph
ENE
|
|
Monday
Sep 21
|
Rain Showers Likely
|
59°F |
10 mph
ENE
|
|
Monday Night
Sep 21
|
Chance Rain Showers
|
48°F |
6 to 9 mph
ENE
|
|
Tuesday
Sep 22
|
Slight Chance Rain Showers then Mostly Cloudy
|
63°F |
7 mph
E
|
|
Tuesday Night
Sep 22
|
Mostly Cloudy
|
48°F |
5 mph
ESE
|
|
Wednesday
Sep 23
|
Partly Sunny
|
69°F |
3 to 7 mph
SE
|
|
Wednesday Night
Sep 23
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
52°F |
5 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Crystal Lake.
