Washington County climate

Washington County Weather in September

NOAA 1991-2020 normals for Nashville 1 E, 4.6 km from Washington County

Average highs run from 84°F on September 1 to 76°F on September 30, and lows from 62°F to 52°F. Normal precipitation for the month is 3.54 in over about 7 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 Washington County, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
80°F
Average low
58°F
Precipitation
3.54 in
Record high
99°FSep 7, 1998
Record low
34°FSep 25, 2001
Chance of a freeze
0%
Days of 90°F or more
3.6
Daylight
13 h 00 min to 11 h 49 min
Cloud cover
46%
Humidity
69%
Dew point
57°F
Wind
7.8 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 184°F62°F96°F 201348°F 200922%0%
Sep 284°F62°F98°F 201145°F 201722%0%
Sep 383°F62°F98°F 201147°F 201722%0%
Sep 483°F61°F98°F 201151°F 201022%0%
Sep 583°F61°F97°F 199948°F 201022%0%
Sep 683°F61°F97°F 199946°F 201122%0%
Sep 782°F60°F99°F 199843°F 201722%0%
Sep 882°F60°F98°F 200245°F 201722%0%
Sep 982°F60°F97°F 200242°F 202422%0%
Sep 1082°F60°F96°F 200243°F 202422%0%
Sep 1181°F59°F95°F 200246°F 202422%0%
Sep 1281°F59°F96°F 201347°F 200722%0%
Sep 1381°F59°F93°F 199843°F 201422%0%
Sep 1481°F58°F94°F 201141°F 201422%0%
Sep 1580°F58°F88°F 201840°F 200722%0%
Sep 1680°F58°F91°F 201938°F 200022%0%
Sep 1780°F57°F93°F 201941°F 199922%0%
Sep 1879°F57°F90°F 201843°F 199923%0%
Sep 1979°F56°F90°F 201741°F 202023%0%
Sep 2079°F56°F93°F 199838°F 200623%0%
Sep 2178°F56°F93°F 201739°F 202023%0%
Sep 2278°F55°F96°F 202236°F 199923%0%
Sep 2378°F55°F94°F 201737°F 201223%0%
Sep 2478°F55°F94°F 200738°F 201223%0%
Sep 2577°F54°F94°F 201734°F 200123%0%
Sep 2677°F54°F92°F 201734°F 200123%0%
Sep 2777°F53°F91°F 201736°F 200123%0%
Sep 2876°F53°F95°F 199836°F 202223%0%
Sep 2976°F53°F93°F 199934°F 200323%0%
Sep 3076°F52°F92°F 201936°F 200323%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Washington County, 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 6:27 AM, sunset 7:27 PM
September 30
sunrise 6:53 AM, sunset 6:42 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00116011 (Nashville 1 E), public domain. Records: NOAA GHCN-Daily, station USC00114400, 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.