Alton, IN Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Alton Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
| Patchy Fog | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy | Partly Sunny | Mostly Cloudy | Mostly Sunny | Mostly Clear | Sunny |
| Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C | Lo: 45°FLo: 7°C | Hi: 75°FHi: 24°C | Lo: 45°FLo: 7°C | Hi: 75°FHi: 24°C | Lo: 45°FLo: 7°C | Hi: 75°FHi: 24°C | Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C | Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 408 PM EDT Fri Oct 23 2026 

Alton Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Alton Weather Map
Alton Quick Facts
Alton Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 211 AM EDT Sat Oct 24 2026
Key Messages
- Dry weather continues through next Friday. Expect chilly nights and warm afternoons. Patchy fog will be possible each morning, mainly in river valleys.
- The next significant chance for widespread rainfall is not expected until the first few days of November (11/1-2).
Discussion
... Issued at 211 AM EDT Sat Oct 24 2026
This Morning through the Weekend...
It is another clear and calm morning across the region as the influence of broad sfc high pressure and upper level ridging continues to b...
Weather World