Forest Lake, IL Weather Forecast
Local 7-day forecast
Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Forest Lake, IL in one place.
A slight chance of showers and thunderstorms before 3am, then showers and thunderstorms likely. Mostly cloudy, with a low around 66. South southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Forest 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: Sep 15, 2026 4:31 AM CDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Forest Lake, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 4:31 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Forest Lake
Tuesday looks like the warmest upcoming period in Forest Lake at 81 degrees F.
Sunday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Overnight at about 15 mph SSW.
Precipitation is mentioned in 14 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 4:31 AM CDT
- Coverage
- 7 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
Showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Mostly cloudy. High near 81, with temperatures falling to around 79 in the afternoon. West southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. North northwest wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers. Mostly cloudy, with a high near 72. Northeast wind 5 to 10 mph. Chance of precipitation is 30%.
A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Southeast wind 0 to 10 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 76. Chance of precipitation is 50%.
A slight chance of rain showers after 1am. Mostly cloudy, with a low around 60.
A chance of rain showers. Partly sunny, with a high near 75.
A slight chance of rain showers before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Showers and thunderstorms likely. Partly sunny, with a high near 79.
Showers and thunderstorms likely. Mostly cloudy, with a low around 61.
A chance of showers and thunderstorms. Partly sunny, with a high near 72.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 55.
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 69.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Sep 15
|
Slight Chance Showers And Thunderstorms
|
66°F |
15 mph
SSW
|
|
Tuesday
Sep 15
|
Showers And Thunderstorms
|
81°F |
10 to 15 mph
WSW
|
|
Tuesday Night
Sep 15
|
Chance Showers And Thunderstorms
|
60°F |
5 mph
NNW
|
|
Wednesday
Sep 16
|
Chance Rain Showers
|
72°F |
5 to 10 mph
NE
|
|
Wednesday Night
Sep 16
|
Chance Showers And Thunderstorms
|
62°F |
0 to 10 mph
SE
|
|
Thursday
Sep 17
|
Chance Showers And Thunderstorms
|
76°F |
0 to 5 mph
N
|
|
Thursday Night
Sep 17
|
Mostly Cloudy then Slight Chance Rain Showers
|
60°F |
5 mph
NE
|
|
Friday
Sep 18
|
Chance Rain Showers
|
75°F |
5 to 10 mph
E
|
|
Friday Night
Sep 18
|
Slight Chance Showers And Thunderstorms
|
62°F |
5 to 10 mph
SE
|
|
Saturday
Sep 19
|
Showers And Thunderstorms Likely
|
79°F |
10 mph
SSW
|
|
Saturday Night
Sep 19
|
Showers And Thunderstorms Likely
|
61°F |
5 to 10 mph
NW
|
|
Sunday
Sep 20
|
Chance Showers And Thunderstorms
|
72°F |
5 to 10 mph
NNE
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
55°F |
5 to 10 mph
NE
|
|
Monday
Sep 21
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
69°F |
5 to 10 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Forest Lake.