Silver Bow County climate

Silver Bow County Weather in September

NOAA 1991-2020 normals for Butte Bert Mooney AP, 14 km from Silver Bow County

Average highs run from 75°F on September 1 to 62°F on September 30, and lows from 40°F to 33°F. Normal precipitation for the month is 1.07 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 Silver Bow County, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
69°F
Average low
37°F
Precipitation
1.07 in
Snowfall
0.1 in
Record high
96°FSep 3, 2022
Record low
3°FSep 24, 1926
Chance of a freeze
97%
Daylight
13 h 17 min to 11 h 44 min
Cloud cover
51%
Humidity
57%
Dew point
33°F
Wind
5.1 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 175°F40°F92°F 199826°F 200624%0%
Sep 275°F40°F90°F 195025°F 195924%0%
Sep 374°F40°F96°F 202223°F 195824%0%
Sep 474°F39°F93°F 199824°F 196924%0%
Sep 574°F39°F93°F 199823°F 196924%0%
Sep 673°F39°F90°F 202226°F 194824%0%
Sep 773°F39°F91°F 202218°F 199224%0%
Sep 872°F38°F90°F 197925°F 202024%0%
Sep 972°F38°F87°F 198120°F 195924%0%
Sep 1072°F38°F87°F 196624°F 192124%0%
Sep 1171°F38°F87°F 198124°F 192124%0%
Sep 1271°F38°F87°F 198118°F 198924%0%
Sep 1370°F37°F87°F 198122°F 197424%0%
Sep 1470°F37°F87°F 194821°F 197024%0%
Sep 1570°F37°F93°F 200022°F 196524%0%
Sep 1669°F37°F86°F 199818°F 196524%0%
Sep 1769°F36°F90°F 19819°F 196524%0%
Sep 1868°F36°F91°F 19816°F 196524%0%
Sep 1968°F36°F86°F 189816°F 198324%0%
Sep 2067°F35°F83°F 19178°F 198324%0%
Sep 2167°F35°F85°F 191821°F 189524%1%
Sep 2266°F35°F86°F 198719°F 199324%1%
Sep 2366°F35°F87°F 198715°F 193424%1%
Sep 2465°F34°F85°F 20013°F 192624%1%
Sep 2565°F34°F86°F 200113°F 192624%1%
Sep 2664°F34°F84°F 196318°F 193324%1%
Sep 2764°F33°F83°F 196316°F 193524%1%
Sep 2863°F33°F84°F 202417°F 198524%1%
Sep 2963°F33°F84°F 196310°F 198524%1%
Sep 3062°F33°F84°F 199213°F 198525%1%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Silver Bow County, 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 (MDT).

September 1
sunrise 6:52 AM, sunset 8:09 PM
September 30
sunrise 7:28 AM, sunset 7:12 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024135 (Butte Bert Mooney AP), public domain. Records: NOAA GHCN-Daily, station USW00024135, 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.