Colchester, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Colchester, IL in one place.
Showers and thunderstorms before 5pm, then a chance of showers and thunderstorms. Mostly cloudy. High near 76, with temperatures falling to around 74 in the afternoon. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Local Weather Overview
This forecast page for Colchester, 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: Apr 15, 2026 5:17 PM CDT.
The active forecast window currently covers Apr 15 to Apr 21, 2026 for Colchester, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 15 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 5:17 PM CDT
- Forecast office
- DVN
- Source
- NOAA / NWS
Daily Outlook
This Week in Colchester
Friday looks like the warmest upcoming period in Colchester at 83 degrees F.
Saturday Night is the coolest period ahead with temperatures near 35 degrees F.
The strongest winds are forecast for Friday at about 10 to 20 mph S.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 5:17 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- DVN
- 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 8pm, then showers and thunderstorms likely between 8pm and 10pm, then a chance of showers and thunderstorms between 10pm and 3am. Mostly cloudy, with a low around 58. 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.
Sunny. High near 78, with temperatures falling to around 76 in the afternoon. West wind around 10 mph.
Mostly clear, with a low around 56. South wind around 5 mph.
Showers and thunderstorms likely after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 60%.
Showers and thunderstorms. Mostly cloudy, with a low around 43. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Rain showers likely. Mostly sunny, with a high near 54. Chance of precipitation is 70%.
A slight chance of rain showers before 7pm. Mostly clear, with a low around 35.
Sunny, with a high near 58.
Mostly clear, with a low around 38.
Sunny, with a high near 69.
Mostly clear, with a low around 50.
Sunny, with a high near 73.
Partly cloudy, with a low around 52.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Apr 15
|
Showers And Thunderstorms
|
76°F |
15 mph
S
|
|
Tonight
Apr 15
|
Chance Showers And Thunderstorms
|
58°F |
10 to 15 mph
SW
|
|
Thursday
Apr 16
|
Sunny
|
78°F |
10 mph
W
|
|
Thursday Night
Apr 16
|
Mostly Clear
|
56°F |
5 mph
S
|
|
Friday
Apr 17
|
Mostly Sunny then Showers And Thunderstorms Likely
|
83°F |
10 to 20 mph
S
|
|
Friday Night
Apr 17
|
Showers And Thunderstorms
|
43°F |
15 mph
SW
|
|
Saturday
Apr 18
|
Rain Showers Likely
|
54°F |
15 to 20 mph
NW
|
|
Saturday Night
Apr 18
|
Slight Chance Rain Showers then Mostly Clear
|
35°F |
10 to 15 mph
W
|
|
Sunday
Apr 19
|
Sunny
|
58°F |
10 to 15 mph
NW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
38°F |
5 to 10 mph
NE
|
|
Monday
Apr 20
|
Sunny
|
69°F |
5 to 15 mph
S
|
|
Monday Night
Apr 20
|
Mostly Clear
|
50°F |
10 to 15 mph
S
|
|
Tuesday
Apr 21
|
Sunny
|
73°F |
15 mph
SW
|
|
Tuesday Night
Apr 21
|
Partly Cloudy
|
52°F |
10 to 15 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Colchester.