Dayton, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Dayton, IL in one place.
Rain showers likely before 4pm, then showers and thunderstorms likely. Cloudy, with a high near 63. Southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for Dayton, 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 5:46 PM CDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Dayton, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 5:46 PM CDT
- Forecast office
- DVN
- Source
- NOAA / NWS
Daily Outlook
This Week in Dayton
Wednesday looks like the warmest upcoming period in Dayton at 75 degrees F.
Friday Night is the coolest period ahead with temperatures near 33 degrees F.
The strongest winds are forecast for Friday at about 20 to 25 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 5:46 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- DVN
- Radar station
- KDVN
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. Mostly cloudy, with a low around 45. Northwest wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
A chance of rain showers after 11am. Mostly cloudy, with a high near 55. Northwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 30%.
A slight chance of rain showers before 7pm, then areas of frost. Mostly clear, with a low around 33. North wind 0 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 20%.
Widespread frost before 9am. Sunny, with a high near 58.
Clear, with a low around 39.
Sunny, with a high near 66.
Mostly clear, with a low around 43.
Mostly sunny, with a high near 69.
Partly cloudy, with a low around 45.
Mostly sunny, with a high near 73.
Mostly clear, with a low around 49.
Sunny, with a high near 75.
Mostly clear, with a low around 53.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 15
|
Showers And Thunderstorms Likely
|
63°F |
5 mph
SW
|
|
Tonight
Oct 15
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
45°F |
10 to 20 mph
NW
|
|
Friday
Oct 16
|
Chance Rain Showers
|
55°F |
20 to 25 mph
NW
|
|
Friday Night
Oct 16
|
Slight Chance Rain Showers then Areas Of Frost
|
33°F |
0 to 20 mph
N
|
|
Saturday
Oct 17
|
Widespread Frost then Sunny
|
58°F |
0 to 5 mph
NE
|
|
Saturday Night
Oct 17
|
Clear
|
39°F |
5 to 10 mph
S
|
|
Sunday
Oct 18
|
Sunny
|
66°F |
10 to 15 mph
S
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
43°F |
5 to 10 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
69°F |
5 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
45°F |
0 to 5 mph
S
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
73°F |
0 to 5 mph
SE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
49°F |
5 mph
SE
|
|
Wednesday
Oct 21
|
Sunny
|
75°F |
5 to 10 mph
SE
|
|
Wednesday Night
Oct 21
|
Mostly Clear
|
53°F |
5 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Dayton.