Thayer climate

Thayer Weather in September

NOAA 1991-2020 normals for Mammoth Spring, 3.4 km from Thayer

Average highs run from 87°F on September 1 to 78°F on September 30, and lows from 62°F to 51°F. Normal precipitation for the month is 3.64 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 Thayer, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
82°F
Average low
57°F
Precipitation
3.64 in
Record high
102°FSep 3, 2000
Record low
35°FSep 30, 1999
Chance of a freeze
1%
Days of 90°F or more
5.3
Daylight
12 h 56 min to 11 h 50 min
Cloud cover
45%
Humidity
69%
Dew point
58°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 187°F62°F98°F 202650°F 202322%0%
Sep 286°F62°F101°F 200049°F 200922%0%
Sep 386°F61°F102°F 200052°F 200921%0%
Sep 486°F61°F98°F 199847°F 199721%0%
Sep 586°F61°F102°F 202641°F 199721%0%
Sep 685°F60°F99°F 202648°F 200321%0%
Sep 785°F60°F99°F 199846°F 201721%0%
Sep 885°F60°F99°F 202643°F 202521%0%
Sep 984°F59°F100°F 202643°F 202421%0%
Sep 1084°F59°F93°F 201345°F 199821%0%
Sep 1184°F59°F94°F 201347°F 201721%0%
Sep 1284°F58°F95°F 202647°F 201521%0%
Sep 1383°F58°F95°F 202544°F 201521%0%
Sep 1483°F58°F96°F 202545°F 199921%0%
Sep 1583°F57°F98°F 202644°F 200721%0%
Sep 1682°F57°F95°F 201945°F 200021%0%
Sep 1782°F56°F98°F 202643°F 199921%0%
Sep 1882°F56°F93°F 201845°F 201221%0%
Sep 1981°F56°F94°F 201842°F 201221%0%
Sep 2081°F55°F93°F 201840°F 200621%0%
Sep 2181°F55°F93°F 202244°F 199921%0%
Sep 2280°F54°F92°F 201742°F 199921%0%
Sep 2380°F54°F91°F 201741°F 201222%0%
Sep 2480°F53°F91°F 201743°F 201422%0%
Sep 2580°F53°F88°F 199838°F 200122%0%
Sep 2679°F52°F89°F 201736°F 200122%0%
Sep 2779°F52°F89°F 199841°F 200022%0%
Sep 2879°F52°F92°F 199942°F 199622%0%
Sep 2978°F51°F90°F 199836°F 200322%0%
Sep 3078°F51°F91°F 201935°F 199922%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Thayer, 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 6:38 AM, sunset 7:34 PM
September 30
sunrise 7:01 AM, sunset 6:51 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00034572 (Mammoth Spring), public domain. Records: NOAA GHCN-Daily, station USW00053901, 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.