Island Lake, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Island Lake, IL in one place.
Rain showers before 4pm, then showers and thunderstorms. Cloudy. High near 60, with temperatures falling to around 58 in the afternoon. East southeast wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for Island 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 15, 2026 3:24 PM CDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Island Lake, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 3:24 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Island Lake
Wednesday looks like the warmest upcoming period in Island Lake at 70 degrees F.
Friday Night is the coolest period ahead with temperatures near 32 degrees F.
The strongest winds are forecast for Tonight at about 5 to 20 mph W.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 3:24 PM 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 11pm. Cloudy. Low around 46, with temperatures rising to around 48 overnight. West wind 5 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Rain showers likely after noon. Mostly cloudy. High near 53, with temperatures falling to around 49 in the afternoon. Northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers before 7pm, then areas of frost. Mostly clear, with a low around 32. North northwest wind 5 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Widespread frost before 9am. Sunny, with a high near 56. West wind 0 to 10 mph.
Clear, with a low around 38.
Sunny, with a high near 63.
Mostly clear, with a low around 40.
Mostly sunny, with a high near 67.
Partly cloudy, with a low around 41.
Mostly sunny, with a high near 68.
Mostly clear, with a low around 44.
Mostly sunny, with a high near 70.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 48.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 15
|
Showers And Thunderstorms
|
60°F |
5 to 10 mph
ESE
|
|
Tonight
Oct 15
|
Showers And Thunderstorms then Cloudy
|
46°F |
5 to 20 mph
W
|
|
Friday
Oct 16
|
Mostly Cloudy then Rain Showers Likely
|
53°F |
15 to 20 mph
NW
|
|
Friday Night
Oct 16
|
Chance Rain Showers then Areas Of Frost
|
32°F |
5 to 20 mph
NNW
|
|
Saturday
Oct 17
|
Widespread Frost then Sunny
|
56°F |
0 to 10 mph
W
|
|
Saturday Night
Oct 17
|
Clear
|
38°F |
5 to 10 mph
SW
|
|
Sunday
Oct 18
|
Sunny
|
63°F |
10 to 15 mph
SSW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
40°F |
0 to 10 mph
SSW
|
|
Monday
Oct 19
|
Mostly Sunny
|
67°F |
0 to 5 mph
SSW
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
41°F |
0 mph
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
68°F |
0 mph
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
44°F |
0 mph
|
|
Wednesday
Oct 21
|
Mostly Sunny
|
70°F |
0 to 5 mph
SE
|
|
Wednesday Night
Oct 21
|
Partly Cloudy then Slight Chance Rain Showers
|
48°F |
0 to 5 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Island Lake.