Louisville, KY Weather
Louisville hourly forecast: next 24 hours
Today's high of 95°F (35°C) is about 13°F (7°C) above the typical September high of 82°F (28°C).
Current conditions in detail
Louisville weather tomorrow (Wednesday, September 16)
Tomorrow in Louisville looks sunny, with a high of 92° and an overnight low of 76°. Precipitation chance is modest at 37%. Winds top out near 8 mph, and the UV index reaches 5 (moderate).
Louisville 14-day forecast
About the weather in Louisville
Louisville runs one of the wider annual swings in our dataset: 24°C separates the average July from the average January. Afternoons reach 87°F (31°C) at the peak of summer and 43°F (6°C) at the depth of winter, with 129 days of measurable precipitation through the year.
Louisville weather: quick facts
- Hottest month: July - highs near 87°F (31°C)
- Coldest month: January - highs near 43°F (6°C)
- Decade extremes (2015-2024): 99°F (37°C) high · -8°F (-22°C) low
- Wettest month: April (12 rainy days) · Sunniest: July (11.7 h sun/day)
- Climate type: humid subtropical
- Annual swing: 24°C between the average warmest and coolest month · day to night: 10°C
- Snow: about 6 days a year
- Months averaging 30°C or hotter: 1
- Average humidity: 71%
Temperatures through the year
Overnight lows average at or below freezing for 2 months, January through February. January is the coolest month, with highs of 43°F (6°C) and lows near 28°F (-2°C). At its warmest, in July, Louisville runs to 87°F (31°C) in the afternoon and back to 70°F (21°C) by dawn. The wettest month is April (5.5 inches (139 mm) across 12 days) and the driest November.
Rain, sun and snow
Sunshine averages 8.7 hours a day over the year, peaking in July at 11.7 hours. Snow falls on roughly 6 days a year, mostly December through March. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 99°F (37°C) and the lowest daily minimum -8°F (-22°C).
Season by season
Spring (March through May)
Through spring, Louisville is mild: 67°F (19°C) by day, 47°F (8°C) after dark, and rain falls on around 37 of the 90 days.
Summer (June through August)
Summer brings hot afternoons here - highs near 86°F (30°C), nights near 68°F (20°C), and rain falls on around 36 of the 90 days. Daylight is generous - around 11.5 hours of sun a day. With the moisture factored in, afternoons feel hotter than the reading suggests - the humidity and dew point converter shows why.
Fall (September through November)
Fall in Louisville settles into easy warmth, with daytime highs averaging 69°F (21°C) and nights around 51°F (11°C); expect showers on roughly 25 days across the season.
Winter (December through February)
Winter is chilly here - highs near 47°F (8°C), nights near 30°F (-1°C), and rain falls on around 32 of the 90 days, plus about 4 snowy days.
Average temperatures in Louisville by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 43° | 28° | 11 | 3.9 in | 5.6 h/day | 70% |
| February | 49° | 30° | 10 | 4.5 in | 6.7 h/day | 68% |
| March | 58° | 38° | 12 | 4.8 in | 7.9 h/day | 67% |
| April | 66° | 46° | 12 | 5.5 in | 9.1 h/day | 68% |
| May | 76° | 58° | 12 | 4.1 in | 10.1 h/day | 73% |
| June | 84° | 65° | 11 | 4.4 in | 11.6 h/day | 72% |
| July | 87° | 70° | 14 | 5.1 in | 11.7 h/day | 76% |
| August | 85° | 68° | 11 | 3.5 in | 11.2 h/day | 75% |
| September | 82° | 63° | 7 | 3.5 in | 10.0 h/day | 72% |
| October | 70° | 52° | 8 | 3.5 in | 8.4 h/day | 71% |
| November | 56° | 39° | 9 | 3.4 in | 6.7 h/day | 71% |
| December | 49° | 33° | 11 | 3.9 in | 5.5 h/day | 74% |