Louisville weather in September
September is one of the best months to visit Louisville: highs of 27°C (81°F) and about 93 mm (3.7 in) of rain on average. Nights average 15°C (58°F) and cloud cover 46% (NASA POWER, 2001–2025 averages). It is the 4th driest month of the year and the 4th warmest. Compared with August, it is cooler and about as wet; October brings highs of 20°C (67°F) and 108 mm (4.3 in) of rain.
Is September a good time to visit Louisville?
best month Weather score 75/100.
Yes. September is one of the best months for weather in Louisville.
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Does it rain a lot in Louisville in September?
Some rain is normal: about 93 mm (3.7 in) falls in an average September. It is the 4th driest month of the year.
How warm is Louisville in September?
Days average 27°C (81°F) and nights 15°C (58°F).
Louisville weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 4°C (38°F) | -5°C (23°F) | 84 mm | 71% | least pleasant |
| February | 6°C (42°F) | -4°C (24°F) | 87 mm | 71% | least pleasant |
| March | 12°C (54°F) | 1°C (34°F) | 113 mm | 66% | fair |
| April | 19°C (66°F) | 7°C (44°F) | 131 mm | 60% | best |
| May | 23°C (74°F) | 13°C (55°F) | 135 mm | 64% | best |
| June | 28°C (82°F) | 18°C (64°F) | 114 mm | 53% | best |
| July | 30°C (85°F) | 20°C (67°F) | 117 mm | 52% | best |
| August | 30°C (86°F) | 19°C (66°F) | 85 mm | 49% | best |
| September | 27°C (81°F) | 15°C (58°F) | 93 mm | 46% | best |
| October | 20°C (67°F) | 8°C (46°F) | 108 mm | 54% | best |
| November | 12°C (54°F) | 1°C (34°F) | 96 mm | 58% | fair |
| December | 6°C (42°F) | -3°C (27°F) | 108 mm | 71% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
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