Greybull climate

Greybull Weather in September

NOAA 1991-2020 normals for Greybull, 0.2 km from Greybull

Average highs run from 83°F on September 1 to 70°F on September 30, and lows from 47°F to 37°F. Normal precipitation for the month is 0.99 in over about 4 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 Greybull, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
77°F
Average low
42°F
Precipitation
0.99 in
Snowfall
0.2 in
Record high
103°FSep 4, 2022
Record low
27°FSep 18, 2003
Chance of a freeze
74%
Days of 90°F or more
3.8
Daylight
13 h 13 min to 11 h 45 min
Cloud cover
47%
Humidity
43%
Dew point
36°F
Wind
7.2 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 183°F47°F100°F 202240°F 202014%0%
Sep 283°F47°F99°F 202437°F 200614%0%
Sep 382°F46°F99°F 202235°F 200614%0%
Sep 482°F46°F103°F 202238°F 200614%0%
Sep 582°F46°F99°F 202040°F 200814%0%
Sep 681°F45°F94°F 202239°F 202514%0%
Sep 781°F45°F103°F 202234°F 201014%0%
Sep 880°F45°F93°F 200534°F 200814%0%
Sep 980°F44°F97°F 202129°F 202014%0%
Sep 1080°F44°F94°F 202133°F 200714%0%
Sep 1179°F44°F91°F 201735°F 200714%0%
Sep 1279°F43°F93°F 201732°F 199914%0%
Sep 1378°F43°F92°F 201531°F 199914%0%
Sep 1478°F43°F90°F 201535°F 200314%0%
Sep 1577°F42°F96°F 200035°F 200314%0%
Sep 1677°F42°F96°F 200038°F 199914%0%
Sep 1777°F42°F89°F 200434°F 200314%0%
Sep 1876°F41°F90°F 200427°F 200314%0%
Sep 1976°F41°F92°F 201030°F 200314%0%
Sep 2075°F41°F86°F 200531°F 199914%0%
Sep 2175°F40°F86°F 201332°F 199913%0%
Sep 2274°F40°F90°F 200729°F 200013%0%
Sep 2374°F40°F89°F 201529°F 200013%0%
Sep 2473°F39°F92°F 202028°F 200013%0%
Sep 2573°F39°F94°F 202428°F 200013%0%
Sep 2672°F39°F97°F 201529°F 200013%0%
Sep 2772°F38°F91°F 200133°F 200012%0%
Sep 2871°F38°F92°F 200128°F 199912%1%
Sep 2970°F37°F97°F 202427°F 199912%1%
Sep 3070°F37°F86°F 201529°F 202112%1%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Greybull, in percent, and of at least 0.1 inch of snowfall.0510151102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

September 1
sunrise 6:35 AM, sunset 7:48 PM
September 30
sunrise 7:09 AM, sunset 6:54 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00484080 (Greybull), public domain. Records: NOAA GHCN-Daily, station USW00024048, 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.