Louisville Weather in September
September in Louisville averages 28°C (82°F) during the day and 16°C (61°F) at night. Quite a bit of rainfall is typical this month, with around 107 mm (4.2 in) on average. An umbrella is a good idea.
Rainfall in Louisville in September
You can expect rain on around 9 days based on historical patterns, with 107 mm (4.2 in) average for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Louisville in September
If you're visiting Louisville in September, expect highs of 28°C (82°F) and overnight lows around 16°C (61°F). Overall, the month follows a fairly predictable daily temperature pattern. With lows of 16°C (61°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Louisville in September
The city usually sees around 235 hours of sunlight, indicating many sunny days — a great month for sightseeing.If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Louisville's climate page.
Louisville Temperature in September
Min Temperature
16°C (61°F)
Max Temperature
28°C (82°F)
Chance of Rain
30%
Precipitation
107 mm (4.2 in)
Rainy days
9 days
Humidity
72%
Sunshine
235 hours
Percentage Sunshine
63%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Louisville typically drop from around 29°C (84°F) at the start of September to approximately 24°C (75°F) by the end. Nights are pleasant, with lows typically ranging from 13°C (55°F) to 20°C (68°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Louisville in September
Browse day-by-day weather records for Louisville spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Louisville historical weather extremes in September
According to our 49 years of weather records for Louisville, the following extremes were recorded between 1976 and 2025.
- On September 3, 2011, temperatures climbed to 38°C (100°F), marking the warmest September day on record.
- Louisville registered its coldest September night on September 30, 1993, with temperatures dropping to 3°C (37°F).
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
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What to Wear in Louisville in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Louisville in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Louisville's climate page.
Temperature Rainfall Sunshine Humidity
See the full Louisville climate overview or explore weather in the United States of America.
