Climate averages 1991–2020
Louisville weather
in May.
A warm, wet month: the 5th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Louisville: daytime highs average 23.9°C and nights cool to about 13.9°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 128 mm of rain on roughly 13 days, which makes May a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 13 min on an average May day.
The nearest other city in this atlas is Lexington (116 km away). In May its highs average 23.0°C, 0.8°C cooler than Louisville, with 121 mm of rain.
Among the 498 cities listed in the United States, Louisville ranks joint 236th of 498 for the warmest May highs and joint 465th of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Louisville is 0.1°C warmer than that mean.
From May to June, average highs rise by 4.6°C to 28.5°C, and monthly rainfall falls from 128 mm to 102 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Louisville climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.2°C-2.9°C | -2.9°C | 91 | 9.7 | 9.810 h |
| February | 7.8°C-1.6°C | -1.6°C | 84 | 9.3 | 10.711 h |
| March | 13.0°C2.7°C | 2.7°C | 114 | 11.4 | 11.912 h |
| April | 19.1°C8.3°C | 8.3°C | 127 | 12.0 | 13.213 h |
| May, selected | 23.9°C13.9°C | 13.9°C | 128 | 12.8 | 14.214 h |
| June | 28.5°C18.7°C | 18.7°C | 102 | 11.7 | 14.815 h |
| July | 30.4°C20.8°C | 20.8°C | 101 | 11.8 | 14.515 h |
| August | 30.0°C20.2°C | 20.2°C | 71 | 9.1 | 13.614 h |
| September | 26.5°C16.5°C | 16.5°C | 77 | 7.7 | 12.512 h |
| October | 19.9°C10.2°C | 10.2°C | 85 | 8.1 | 11.211 h |
| November | 12.6°C4.0°C | 4.0°C | 89 | 9.3 | 10.110 h |
| December | 7.1°C-0.5°C | -0.5°C | 102 | 10.1 | 9.610 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Lexington in MayUnited States · 116 kmHigh 23.0°C · Low 13.2°C · 121 mm rain
- Bloomington (Indiana), United States in MayUnited States · 121 kmHigh 22.5°C · Low 13.0°C · 130 mm rain
- Cincinnati in MayUnited States · 145 kmHigh 22.4°C · Low 12.5°C · 117 mm rain
- Evansville in MayUnited States · 160 kmHigh 24.6°C · Low 15.1°C · 123 mm rain
- Indianapolis in MayUnited States · 172 kmHigh 22.0°C · Low 12.4°C · 122 mm rain
- Fishers in MayUnited States · 190 kmHigh 21.8°C · Low 12.0°C · 118 mm rain
- Carmel in MayUnited States · 194 kmHigh 21.7°C · Low 12.1°C · 118 mm rain
- Dayton in MayUnited States · 215 kmHigh 22.0°C · Low 12.3°C · 116 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Louisville) is explained once on the Louisville year overview and on the Sources, method and limits page.