Weather WorldDecatur, IA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Decatur Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  | | | | | | | | | | |
| Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear |
| Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 602 AM CDT Sat Oct 03 2026 
Decatur Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Decatur Weather Map
Decatur Quick Facts
Decatur Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1220 PM CDT Sat Oct 3 2026
Key Messages
- Mostly dry period over the next 7 days.
- Seasonal temperatures through the period with modest warming mid to late next week.
- A few periods with overnight/early morning fog are possible.
Aviation
/18Z TAFS THROUGH 18Z SUNDAY/... Issued at 1220 PM CDT Sat Oct 3 2026
VFR conditions otherwise are expected through the period across all sites. Breezy conditions will remain across the forecast area over the next several hours, but especially across the northern sites where gusts up to 25-30 kno...