Climate averages 1991–2020
Lexington weather
in September.
A warm, moderately wet month: the 4th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Lexington: daytime highs average 25.6°C and nights cool to about 15.9°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 89 mm of rain on roughly 8 days, which makes September a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 28 min on an average September day.
The nearest other city in this atlas is Louisville (116 km away). In September its highs average 26.5°C, 0.9°C warmer than Lexington, with 77 mm of rain.
Among the 498 cities listed in the United States, Lexington ranks joint 293rd of 498 for the warmest September highs and joint 335th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Lexington is 1.3°C cooler than that mean.
From September to October, average highs fall by 6.4°C to 19.2°C, and monthly rainfall falls from 89 mm to 86 mm.
The annual picture
September 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
Lexington climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.3°C-2.9°C | -2.9°C | 93 | 10.4 | 9.910 h |
| February | 7.7°C-1.5°C | -1.5°C | 96 | 10.3 | 10.811 h |
| March | 12.5°C2.4°C | 2.4°C | 114 | 12.1 | 11.912 h |
| April | 18.4°C7.8°C | 7.8°C | 125 | 12.1 | 13.213 h |
| May | 23.0°C13.2°C | 13.2°C | 121 | 13.4 | 14.214 h |
| June | 27.6°C17.8°C | 17.8°C | 109 | 13.3 | 14.815 h |
| July | 29.4°C20.0°C | 20.0°C | 105 | 12.5 | 14.515 h |
| August | 29.1°C19.4°C | 19.4°C | 79 | 10.5 | 13.614 h |
| September, selected | 25.6°C15.9°C | 15.9°C | 89 | 8.4 | 12.512 h |
| October | 19.2°C9.8°C | 9.8°C | 86 | 8.6 | 11.211 h |
| November | 12.3°C3.8°C | 3.8°C | 88 | 8.9 | 10.210 h |
| December | 7.1°C-0.4°C | -0.4°C | 106 | 10.8 | 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
September in nearby cities
- Louisville in SeptemberUnited States · 116 kmHigh 26.5°C · Low 16.5°C · 77 mm rain
- Cincinnati in SeptemberUnited States · 127 kmHigh 25.0°C · Low 15.2°C · 68 mm rain
- Meads in SeptemberUnited States · 162 kmHigh 25.9°C · Low 16.3°C · 91 mm rain
- Dayton in SeptemberUnited States · 198 kmHigh 24.4°C · Low 15.3°C · 68 mm rain
- Bloomington (Indiana), United States in SeptemberUnited States · 221 kmHigh 25.3°C · Low 15.6°C · 73 mm rain
- Knoxville in SeptemberUnited States · 231 kmHigh 26.7°C · Low 16.8°C · 90 mm rain
- Indianapolis in SeptemberUnited States · 246 kmHigh 24.6°C · Low 15.2°C · 72 mm rain
- Columbus in SeptemberUnited States · 254 kmHigh 24.3°C · Low 14.6°C · 73 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 Lexington) is explained once on the Lexington year overview and on the Sources, method and limits page.