Blaine County Weather in September
Average highs run from 78°F on September 1 to 66°F on September 30, and lows from 47°F to 37°F. Normal precipitation for the month is 0.96 in.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 72°F
- Average low
- 42°F
- Precipitation
- 0.96 in
- Record high
- 104°FSep 7, 2022
- Record low
- 18°FSep 21, 1995
- Chance of a freeze
- 83%
- Days of 90°F or more
- 1.7
- Daylight
- 13 h 24 min to 11 h 43 min
- Cloud cover
- 55%
- Humidity
- 54%
- Dew point
- 39°F
- Wind
- 10.1 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 78°F | 47°F | 99°F 1983 | 35°F 1999 | |
| Sep 2 | 77°F | 47°F | 101°F 1998 | 32°F 1974 | |
| Sep 3 | 77°F | 46°F | 103°F 2022 | 29°F 1962 | |
| Sep 4 | 76°F | 46°F | 98°F 1978 | 34°F 1962 | |
| Sep 5 | 76°F | 46°F | 101°F 1967 | 35°F 1962 | |
| Sep 6 | 75°F | 45°F | 98°F 1980 | 28°F 1992 | |
| Sep 7 | 75°F | 45°F | 104°F 2022 | 33°F 1962 | |
| Sep 8 | 75°F | 45°F | 97°F 1979 | 31°F 1962 | |
| Sep 9 | 74°F | 44°F | 94°F 2017 | 26°F 1962 | |
| Sep 10 | 74°F | 44°F | 90°F 1963 | 30°F 1989 | |
| Sep 11 | 74°F | 43°F | 94°F 2017 | 23°F 1989 | |
| Sep 12 | 73°F | 43°F | 92°F 1990 | 27°F 1970 | |
| Sep 13 | 73°F | 43°F | 90°F 1987 | 24°F 1970 | |
| Sep 14 | 72°F | 42°F | 90°F 2012 | 22°F 1970 | |
| Sep 15 | 72°F | 42°F | 94°F 1979 | 26°F 1982 | |
| Sep 16 | 72°F | 42°F | 95°F 2009 | 29°F 1980 | |
| Sep 17 | 71°F | 41°F | 99°F 2009 | 27°F 1991 | |
| Sep 18 | 71°F | 41°F | 94°F 1981 | 23°F 1991 | |
| Sep 19 | 70°F | 41°F | 96°F 2009 | 24°F 1991 | |
| Sep 20 | 70°F | 40°F | 89°F 2025 | 24°F 1995 | |
| Sep 21 | 70°F | 40°F | 90°F 2025 | 18°F 1995 | |
| Sep 22 | 69°F | 40°F | 89°F 2011 | 25°F 1993 | |
| Sep 23 | 69°F | 39°F | 93°F 1992 | 21°F 2000 | |
| Sep 24 | 68°F | 39°F | 94°F 2009 | 20°F 1984 | |
| Sep 25 | 68°F | 38°F | 96°F 2001 | 26°F 1980 | |
| Sep 26 | 68°F | 38°F | 88°F 1963 | 24°F 1961 | |
| Sep 27 | 67°F | 38°F | 89°F 2001 | 19°F 1984 | |
| Sep 28 | 67°F | 37°F | 93°F 2022 | 18°F 1984 | |
| Sep 29 | 66°F | 37°F | 90°F 1976 | 21°F 1985 | |
| Sep 30 | 66°F | 37°F | 92°F 2011 | 19°F 1985 |
Chance of rain
Sunrise and sunset
Times for 2026, local time (MDT).
- September 1
- sunrise 6:33 AM, sunset 7:57 PM
- September 30
- sunrise 7:14 AM, sunset 6:57 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00243118 (Ft Belknap 2 Sw), public domain. Records: NOAA GHCN-Daily, station USW00094012, 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.