Jamaica, IL Weather Forecast
Local 7-day forecast
Sunny then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Jamaica, IL in one place.
A chance of showers and thunderstorms after 5pm. Sunny, with a high near 90. Heat index values as high as 100. West wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Local Weather Overview
This forecast page for Jamaica, 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: Jul 17, 2026 7:52 PM CDT.
The active forecast window currently covers Jul 18 to Jul 23, 2026 for Jamaica, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 18 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 7:52 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Jamaica
Saturday looks like the warmest upcoming period in Jamaica at 90 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 59 degrees F.
The strongest winds are forecast for Tuesday at about 12 to 17 mph W.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 7:52 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 10pm, then a chance of showers and thunderstorms between 10pm and midnight, then a slight chance of showers and thunderstorms between midnight and 1am. Mostly cloudy, with a low around 67. North northwest wind 5 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly sunny, with a high near 85. Northeast wind around 6 mph.
Mostly clear, with a low around 64. East wind 1 to 5 mph.
Mostly sunny, with a high near 89. South wind 2 to 7 mph.
A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 73. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 63.
Sunny, with a high near 78.
Mostly clear, with a low around 59.
Sunny, with a high near 80.
Partly cloudy, with a low around 59.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Sunny then Chance Showers And Thunderstorms
|
90°F |
8 to 13 mph
W
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
67°F |
5 to 10 mph
NNW
|
|
Sunday
Jul 19
|
Mostly Sunny
|
85°F |
6 mph
NE
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
64°F |
1 to 5 mph
E
|
|
Monday
Jul 20
|
Mostly Sunny
|
89°F |
2 to 7 mph
S
|
|
Monday Night
Jul 20
|
Chance Showers And Thunderstorms
|
73°F |
7 to 13 mph
SSW
|
|
Tuesday
Jul 21
|
Chance Showers And Thunderstorms
|
90°F |
12 to 17 mph
W
|
|
Tuesday Night
Jul 21
|
Slight Chance Showers And Thunderstorms then Mostly Clear
|
63°F |
9 to 16 mph
NW
|
|
Wednesday
Jul 22
|
Sunny
|
78°F |
10 to 14 mph
NNW
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
59°F |
2 to 10 mph
NNW
|
|
Thursday
Jul 23
|
Sunny
|
80°F |
5 mph
NW
|
|
Thursday Night
Jul 23
|
Partly Cloudy
|
59°F |
3 mph
WNW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Jamaica.