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Derby Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
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| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers |
| Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 90°FHi: 32°C | Lo: 71°FLo: 22°C |
| POP: 20% | POP: 50% | POP: 70% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 405 AM EDT Fri Sep 04 2026 
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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 532 AM EDT Fri Sep 4 2026
Key Messages
1) Heat headlines continue through Friday afternoon for much of the region. Hot and muggy conditions continue again on Saturday, though will likely fall below headline criteria.
2) Strong to severe storms will be possible at times today and Saturday. Any storms that develop may produce locally heavy rainfall.
Discussion
... KEY MESSAGE 1) 500H ridge over the Tennessee Valley region will continue to provide mass subsidence and hot conditions across the area. Fresh guidance paints heat in...