Simpson County climate

Simpson County Weather in September

NOAA 1991-2020 normals for D'lo 2 Sw, 4.8 km from Simpson County

Average highs run from 93°F on September 1 to 87°F on September 30, and lows from 71°F to 62°F. Normal precipitation for the month is 3.36 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 Simpson County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
91°F
Average low
67°F
Precipitation
3.36 in
Record high
104°FSep 1, 2000
Record low
35°FSep 29, 1967
Chance of a freeze
0%
Days of 90°F or more
10.7
Daylight
12 h 49 min to 11 h 53 min
Cloud cover
46%
Humidity
73%
Dew point
65°F
Wind
3.8 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 193°F71°F104°F 200057°F 196726%0%
Sep 293°F71°F102°F 200053°F 196725%0%
Sep 393°F70°F102°F 200056°F 198725%0%
Sep 493°F70°F104°F 200054°F 197425%0%
Sep 593°F70°F100°F 199055°F 197424%0%
Sep 693°F70°F99°F 202655°F 198424%0%
Sep 793°F70°F99°F 201950°F 201123%0%
Sep 892°F69°F102°F 198055°F 201123%0%
Sep 992°F69°F102°F 198052°F 201123%0%
Sep 1092°F69°F103°F 198053°F 198122%0%
Sep 1192°F69°F98°F 201051°F 197622%0%
Sep 1292°F68°F102°F 198050°F 196922%0%
Sep 1391°F68°F100°F 198050°F 196821%0%
Sep 1491°F68°F101°F 198048°F 196421%0%
Sep 1591°F67°F104°F 198051°F 196421%0%
Sep 1691°F67°F101°F 198055°F 197920%0%
Sep 1791°F67°F98°F 201952°F 198120%0%
Sep 1890°F66°F99°F 201046°F 198120%0%
Sep 1990°F66°F97°F 201543°F 198120%0%
Sep 2090°F66°F98°F 201045°F 198119%0%
Sep 2190°F65°F98°F 198048°F 198319%0%
Sep 2289°F65°F98°F 198041°F 198319%0%
Sep 2389°F65°F97°F 198041°F 198219%0%
Sep 2489°F64°F96°F 201646°F 198218%0%
Sep 2589°F64°F97°F 201646°F 196518%0%
Sep 2688°F63°F94°F 198644°F 197518%0%
Sep 2788°F63°F95°F 198644°F 197518%0%
Sep 2888°F62°F96°F 198641°F 196717%0%
Sep 2987°F62°F96°F 198635°F 196717%0%
Sep 3087°F62°F95°F 201937°F 196717%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Simpson County, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 6:35 AM, sunset 7:24 PM
September 30
sunrise 6:53 AM, sunset 6:46 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00222385 (D'lo 2 Sw), public domain. Records: NOAA GHCN-Daily, station USW00003940, 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.