Cheyenne climate

Cheyenne Weather in September

NOAA 1991-2020 normals for Cheyenne 6SW Mesonet, 9.1 km from Cheyenne

Average highs run from 87°F on September 1 to 79°F on September 30, and lows from 65°F to 55°F. Normal precipitation for the month is 2.42 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 Cheyenne, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
84°F
Average low
61°F
Precipitation
2.42 in
Record high
108°FSep 5, 2000
Record low
28°FSep 30, 1984
Chance of a freeze
0%
Days of 90°F or more
9.8
Daylight
12 h 55 min to 11 h 51 min
Cloud cover
42%
Humidity
59%
Dew point
56°F
Wind
10.7 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°F65°F106°F 193949°F 19670%
Sep 287°F65°F105°F 200047°F 19520%
Sep 387°F65°F106°F 200051°F 19340%
Sep 486°F64°F107°F 200047°F 19530%
Sep 586°F64°F108°F 200047°F 19680%
Sep 686°F64°F106°F 199850°F 19430%
Sep 786°F64°F106°F 202342°F 19500%
Sep 886°F63°F101°F 199846°F 19500%
Sep 985°F63°F101°F 194044°F 20200%
Sep 1085°F63°F101°F 196446°F 19680%
Sep 1185°F62°F103°F 200045°F 19590%
Sep 1285°F62°F105°F 200046°F 19590%
Sep 1384°F62°F103°F 193045°F 19830%
Sep 1484°F61°F100°F 196541°F 19830%
Sep 1584°F61°F102°F 195639°F 19930%
Sep 1684°F61°F101°F 195643°F 19510%
Sep 1783°F60°F99°F 193140°F 19810%
Sep 1883°F60°F101°F 195438°F 19810%
Sep 1983°F60°F101°F 195442°F 19710%
Sep 2083°F59°F101°F 202440°F 19420%
Sep 2182°F59°F98°F 194434°F 19830%
Sep 2282°F59°F100°F 192638°F 19950%
Sep 2382°F58°F98°F 193341°F 19890%
Sep 2481°F58°F97°F 193034°F 19890%
Sep 2581°F57°F98°F 199838°F 20000%
Sep 2681°F57°F99°F 193833°F 19120%
Sep 2780°F57°F97°F 195336°F 19420%
Sep 2880°F56°F102°F 195335°F 19260%
Sep 2980°F56°F97°F 199838°F 19840%
Sep 3079°F55°F99°F 197728°F 19840%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Cheyenne, 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 (CDT).

September 1
sunrise 7:11 AM, sunset 8:06 PM
September 30
sunrise 7:33 AM, sunset 7:24 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00341743 (Cheyenne 6SW Mesonet), public domain. Records: NOAA GHCN-Daily, station USC00342849, 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.