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Derby, IA Weather Forecast
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Derby Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  | | |  |  |  | |  |  | |  |
| Drizzle | Chance of Showers | Showers | Chance of Showers | Chance of Showers | Partly Cloudy | Sunny | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers |
| Hi: 65°FHi: 18°C | Lo: 59°FLo: 15°C | Hi: 60°FHi: 16°C | Lo: 51°FLo: 11°C | Hi: 59°FHi: 15°C | Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 51°FLo: 11°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C |
| POP: 50% | POP: 70% | POP: 50% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 513 AM CDT Sun Sep 20 2026 
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Issued: 557 AM CDT Sun Sep 20 2026
Key Messages
- Showers and thunderstorms are moving out of the area and will continue to move out through the morning.
- Areas of patchy fog are possible before sunrise, mainly north of I-80.
- More autumnal conditions expected today with cooler temperatures and drizzle throughout the day with the potential for more widespread showers and storms overnight into Monday.
- Cool temperatures and moist weather persist into Monday, with drier conditions expected Tuesday and Wednesday.
Aviation
/06Z TAFS THROUGH ...