Lexington, KY weather in September
In September, Lexington sees highs around 80°F and lows around 58°F: warm, with some rain. Expect about 8 wet days. Good for outdoor plans.
- Normal high
- 80°F
- Normal low
- 58°F
- Wet days
- 8
- 3.4 in total
- Muggy days
- 6
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 85°F | 75°F |
| Normal low | 63°F | 53°F |
| Chance of a wet day | 27% | 26% |
| Sunrise / sunset | 7:07 am / 8:07 pm | 7:32 am / 7:22 pm |
| Daylight | 13.0 h | 11.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical September day
- 6 am61°Fdew point 57°F
- 9 am68°Fdew point 59°F
- Noon75°Fdew point 59°F
- 3 pm78°Fdew point 58°F
- 6 pm75°Fdew point 58°F
- 9 pm68°Fdew point 58°F
NOAA hourly normals (local standard time) from Lexington Bluegrass Airport (8 mi away); average wind 6 mph; clear or few clouds in 62% of daytime hours, mostly cloudy or overcast in 29%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F10 of 30
- Hot dayshigh 90°F or more4 of 30
- Muggy daysdaily mean dew point 65°F or more6 of 30
- Wet daysat least 0.01 in of rain or melted snow8 of 30
- Notable rainat least 0.10 in5 of 30
- Freezing nightslow 32°F or below0 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 3.4 in; a dry September brings about 1.5 in and a wet one about 4.9 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202019: average high 91°F
- Coolest September2006: average high 73°F
- Wettest September2018: 10.4 in
- Driest September2019: no measurable precipitation
- Highest reading100°F (September 10, 2019)
- Lowest reading34°F (September 30, 1993)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 86°F | 80°F | 69°F |
| Normal low | 65°F | 58°F | 47°F |
| Wet days | 10 | 8 | 9 |
| Comfortable days | 2 | 10 | 15 |
| Daylight | 13.6 h | 12.4 h | 11.2 h |
Highs change by -6°F from August and -11°F into October.
How Lexington ranks in September
- Normal high194th warmest of 378 cities; 3rd of 3 in Kentucky
- Wet days182nd driest of 378
- Comfortable days151st most of 342
Heating and cooling
September has 42 heating degree days and 166 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is Lexington in September?
The normal high is 80°F and the normal low is 58°F. From 1991 to 2020 the hottest September reading was 100°F (September 10, 2019).
Does it rain a lot in Lexington in September?
About 8 days in September have at least 0.01 in of precipitation, and the normal total is 3.4 in. The wettest September in 1991-2020 was in 2018 (10.4 in); the driest was in 2019, with no measurable precipitation.
Is September a good time to visit Lexington?
September ranks 4th of 12 months on our comfort score for Lexington (61 out of 100). It has about 10 comfortable days and about 4 days at 90°F or hotter. The best months are April, May and October.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Lexington Bluegrass Airport (USW00093820), 8.0 mi W of the city center, 980 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Blue Grass Airport (724220-93820), 8.4 mi W of the city center, 962 ft . Hourly observations, 1991-2020.