Louisville weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Excellent
Best time to visit: April – June, September – October
What is the weather like in Louisville in September?
In September, Louisville is warm: daytime highs average 27 °C, and nights cool down to about 17 °C. The sun shines for around 7 hours a day. Rain falls on about 8 days, adding up to 79 mm. On about 7 days the thermometer climbs to 30 °C or more. All in all, September is an excellent month for a holiday in Louisville.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 67 | 84 | 80 |
| Day | 30° | 27° | 20° |
| Night | 20° | 17° | 10° |
| Sun | 8 h | 7 h | 6 h |
| Rain days | 9 | 8 | 8 |
More details for September
- Daylight
- 12 h 30 min07:24 – 19:53
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 8 daysdew point 18 °C or moreAll months
- Wind
- 12 km/haverage daily peakAll months
- Cloud cover
- 45 %on averageAll months
- Hot days
- 7 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/Kentucky/Louisville
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %62 %
- Few rainy daysweight 30 %74 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
Louisville in September: quick answers
Is Louisville hot in September?
Warm rather than hot: in September, daytime highs in Louisville average 27 °C and nights cool to about 17 °C. On about 7 days the thermometer climbs to 30 °C or more.
Does it rain much in Louisville in September?
Rain falls on about 8 days, adding up to 79 mm.
Louisville month by month
The whole year in LouisvilleAll destinations: USAWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences