Simpsonville climate

Simpsonville Weather in September

NOAA 1991-2020 normals for Fountain Inn 2 Sw, 7.4 km from Simpsonville

Average highs run from 86°F on September 1 to 79°F on September 30, and lows from 65°F to 56°F. Normal precipitation for the month is 3.69 in.

September day by day

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

Normal daily high and low temperature at Simpsonville, in °F, with the record for each date.406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
83°F
Average low
61°F
Precipitation
3.69 in
Record high
98°FSep 12, 2019
Record low
43°FSep 23, 1999
Chance of a freeze
0%
Days of 90°F or more
7.9
Daylight
12 h 53 min to 11 h 51 min
Cloud cover
49%
Humidity
71%
Dew point
61°F
Wind
4.5 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 186°F65°F93°F 201854°F 19990%
Sep 286°F65°F93°F 202060°F 19990%
Sep 386°F65°F94°F 202059°F 19940%
Sep 485°F65°F95°F 201954°F 20090%
Sep 585°F64°F94°F 201948°F 19970%
Sep 685°F64°F95°F 201949°F 19970%
Sep 785°F64°F96°F 201952°F 19970%
Sep 885°F64°F93°F 201955°F 19970%
Sep 984°F64°F97°F 201951°F 19980%
Sep 1084°F63°F96°F 201950°F 19980%
Sep 1184°F63°F96°F 201950°F 19980%
Sep 1284°F63°F98°F 201953°F 19980%
Sep 1383°F62°F96°F 201956°F 19980%
Sep 1483°F62°F92°F 201849°F 19960%
Sep 1583°F62°F92°F 201949°F 19960%
Sep 1683°F62°F96°F 201949°F 19960%
Sep 1782°F61°F97°F 201950°F 20000%
Sep 1882°F61°F92°F 200550°F 20010%
Sep 1982°F61°F92°F 201852°F 19990%
Sep 2082°F60°F91°F 200551°F 20200%
Sep 2181°F60°F92°F 202251°F 20060%
Sep 2281°F59°F94°F 202249°F 20200%
Sep 2381°F59°F90°F 201943°F 19990%
Sep 2481°F59°F91°F 201943°F 19990%
Sep 2580°F58°F91°F 201948°F 19950%
Sep 2680°F58°F96°F 201943°F 20010%
Sep 2780°F57°F94°F 201943°F 20010%
Sep 2879°F57°F88°F 201945°F 20000%
Sep 2979°F57°F95°F 201943°F 20030%
Sep 3079°F56°F95°F 201943°F 20030%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Simpsonville, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

September 1
sunrise 7:02 AM, sunset 7:55 PM
September 30
sunrise 7:23 AM, sunset 7:14 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00383145 (Fountain Inn 2 Sw), public domain. Records: NOAA GHCN-Daily, station USC00383735, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.