Williamstown, IN Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Williamstown Weather Forecast
| REST OF TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | TUESDAY |
| Patchy Fog | Sunny | Patchy Fog | Sunny | Clear | Clear | Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 41°FLo: 5°C | Hi: 70°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C Lo: 41°FLo: 5°C | Hi: 69°FHi: 21°C Lo: 41°FLo: 5°C | Hi: 71°FHi: 22°C Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 818 PM EDT Tue Oct 20 2026 

Williamstown Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Williamstown Weather Map
Williamstown Quick Facts
Williamstown Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 618 PM EDT Tue Oct 20 2026
Key Messages
- Dry yet pleasant fall weather will prevail through this weekend
- Light winds and partly/mostly clear skies will oversee near to slightly above normal temperatures
Discussion
(This evening through Tuesday)... Issued at 225 PM EDT Tue Oct 20 2026
Quiet weather is expected through the next seven days as surface high pressure remains dominant across the region. Guidance is in good agreement through the end of the week, showing upper ridging amplifying as it builds eastward across the region....
Weather World