Garrison climate

Garrison Weather in September

NOAA 1991-2020 normals for Garrison, 0.3 km from Garrison

Average highs run from 77°F on September 1 to 65°F on September 30, and lows from 52°F to 41°F. Normal precipitation for the month is 1.68 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 Garrison, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
71°F
Average low
46°F
Precipitation
1.68 in
Record high
104°FSep 5, 2001
Record low
23°FSep 22, 2012
Chance of a freeze
53%
Days of 90°F or more
1.3
Daylight
13 h 22 min to 11 h 43 min
Cloud cover
54%
Humidity
60%
Dew point
43°F
Wind
11.4 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 177°F52°F99°F 201240°F 202422%0%
Sep 277°F51°F96°F 202341°F 200822%0%
Sep 377°F51°F96°F 201535°F 200822%0%
Sep 476°F51°F96°F 199840°F 202522%0%
Sep 576°F50°F104°F 200135°F 202522%0%
Sep 675°F50°F95°F 200332°F 202522%0%
Sep 775°F50°F97°F 200331°F 202022%0%
Sep 875°F49°F89°F 200325°F 202022%0%
Sep 974°F49°F92°F 199827°F 202022%0%
Sep 1074°F49°F94°F 199835°F 199922%0%
Sep 1173°F48°F87°F 201135°F 200722%0%
Sep 1273°F48°F96°F 201734°F 201422%0%
Sep 1373°F48°F92°F 201534°F 202622%0%
Sep 1472°F47°F84°F 200927°F 200722%
Sep 1572°F47°F88°F 201233°F 199922%
Sep 1671°F46°F92°F 200238°F 202022%
Sep 1771°F46°F88°F 199835°F 201722%
Sep 1871°F46°F92°F 200431°F 201022%
Sep 1970°F45°F88°F 202232°F 200322%
Sep 2070°F45°F85°F 202430°F 200622%
Sep 2169°F44°F83°F 200833°F 199822%
Sep 2269°F44°F87°F 202023°F 201221%
Sep 2368°F44°F83°F 201127°F 201221%
Sep 2468°F43°F84°F 201428°F 200321%
Sep 2567°F43°F90°F 201428°F 200221%
Sep 2667°F42°F92°F 202435°F 200221%
Sep 2766°F42°F90°F 202133°F 201821%
Sep 2866°F42°F97°F 202126°F 201820%
Sep 2965°F41°F96°F 202430°F 200320%
Sep 3065°F41°F86°F 202524°F 200320%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Garrison, 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 7:04 AM, sunset 8:26 PM
September 30
sunrise 7:44 AM, sunset 7:27 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00323376 (Garrison), public domain. Records: NOAA GHCN-Daily, station USW00094041, 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.