Louisville climate

Louisville Weather in September

NOAA 1991-2020 normals for Flora 5 Nw, 9.4 km from Louisville

Average highs run from 85°F on September 1 to 77°F on September 30, and lows from 62°F to 51°F. Normal precipitation for the month is 3.27 in over about 6 wet days.

September day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Louisville, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
81°F
Average low
57°F
Precipitation
3.27 in
Record high
103°FSep 3, 2026
Record low
36°FSep 25, 2001
Chance of a freeze
5%
Days of 90°F or more
4.2
Daylight
13 h 01 min to 11 h 49 min
Cloud cover
46%
Humidity
69%
Dew point
56°F
Wind
8.1 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Sep 185°F62°F100°F 202649°F 200920%0%
Sep 285°F62°F102°F 202646°F 201720%0%
Sep 385°F61°F103°F 202647°F 201720%0%
Sep 484°F61°F101°F 201152°F 201020%0%
Sep 584°F61°F102°F 202648°F 201020%0%
Sep 684°F61°F102°F 202647°F 201120%0%
Sep 784°F60°F97°F 201545°F 201720%0%
Sep 884°F60°F99°F 200244°F 202420%0%
Sep 983°F60°F99°F 200243°F 202420%0%
Sep 1083°F59°F98°F 200243°F 202420%0%
Sep 1183°F59°F96°F 200247°F 202420%0%
Sep 1282°F58°F97°F 201348°F 201720%0%
Sep 1382°F58°F94°F 201945°F 201420%0%
Sep 1482°F58°F94°F 202542°F 201420%0%
Sep 1582°F57°F100°F 202542°F 201120%0%
Sep 1681°F57°F99°F 202640°F 201121%0%
Sep 1781°F56°F98°F 202641°F 201121%0%
Sep 1881°F56°F92°F 201847°F 200021%0%
Sep 1980°F56°F94°F 202542°F 201221%0%
Sep 2080°F55°F94°F 200540°F 200321%0%
Sep 2180°F55°F97°F 202240°F 200621%0%
Sep 2279°F54°F97°F 202246°F 200021%0%
Sep 2379°F54°F95°F 201740°F 201222%0%
Sep 2479°F54°F95°F 200738°F 201222%0%
Sep 2578°F53°F94°F 201736°F 200122%0%
Sep 2678°F53°F93°F 201736°F 200122%0%
Sep 2778°F53°F93°F 201738°F 200022%0%
Sep 2877°F52°F91°F 201942°F 200122%0%
Sep 2977°F52°F90°F 202138°F 200322%0%
Sep 3077°F51°F93°F 201938°F 200322%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Louisville, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 6:23 AM, sunset 7:24 PM
September 30
sunrise 6:49 AM, sunset 6:38 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00113109 (Flora 5 Nw), public domain. Records: NOAA GHCN-Daily, station USC00113106, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.