Black Eagle Weather in September
Average highs run from 79°F on September 1 to 66°F on September 30, and lows from 49°F to 41°F. Normal precipitation for the month is 1.39 in over about 7 wet days.
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
- 73°F
- Average low
- 45°F
- Precipitation
- 1.39 in
- Snowfall
- 0.8 in
- Record high
- 97°FSep 6, 1893
- Record low
- 10°FSep 24, 1926
- Chance of a freeze
- 47%
- Days of 90°F or more
- 2.0
- Daylight
- 13 h 21 min to 11 h 43 min
- Cloud cover
- 53%
- Humidity
- 55%
- Dew point
- 38°F
- Wind
- 8.3 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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Sep 1 | 79°F | 49°F | 93°F 2016 | 34°F 1930 | 22% | 0% |
| Sep 2 | 79°F | 49°F | 96°F 2017 | 35°F 2008 | 22% | 0% |
| Sep 3 | 78°F | 48°F | 93°F 1955 | 35°F 1956 | 22% | 0% |
| Sep 4 | 78°F | 48°F | 92°F 1919 | 33°F 1929 | 23% | 0% |
| Sep 5 | 77°F | 48°F | 95°F 1931 | 33°F 1956 | 23% | 1% |
| Sep 6 | 77°F | 47°F | 97°F 1893 | 27°F 1929 | 23% | 1% |
| Sep 7 | 77°F | 47°F | 93°F 1955 | 27°F 1929 | 23% | 1% |
| Sep 8 | 76°F | 47°F | 92°F 1956 | 34°F 1910 | 23% | 1% |
| Sep 9 | 76°F | 47°F | 92°F 2017 | 32°F 1896 | 23% | 1% |
| Sep 10 | 75°F | 46°F | 92°F 1956 | 29°F 1921 | 24% | 1% |
| Sep 11 | 75°F | 46°F | 93°F 1919 | 29°F 1921 | 24% | 1% |
| Sep 12 | 74°F | 46°F | 92°F 1919 | 30°F 1921 | 24% | 1% |
| Sep 13 | 74°F | 45°F | 88°F 1953 | 27°F 1915 | 24% | 1% |
| Sep 14 | 73°F | 45°F | 91°F 1935 | 30°F 1903 | 24% | 2% |
| Sep 15 | 73°F | 45°F | 90°F 1953 | 29°F 1918 | 24% | 2% |
| Sep 16 | 73°F | 45°F | 91°F 2009 | 28°F 1936 | 24% | 2% |
| Sep 17 | 72°F | 44°F | 92°F 2009 | 28°F 1902 | 24% | 2% |
| Sep 18 | 72°F | 44°F | 89°F 1956 | 30°F 1901 | 24% | 2% |
| Sep 19 | 71°F | 44°F | 92°F 2009 | 28°F 1923 | 24% | 2% |
| Sep 20 | 71°F | 43°F | 93°F 1917 | 26°F 1934 | 24% | 3% |
| Sep 21 | 70°F | 43°F | 90°F 1917 | 27°F 1925 | 25% | 3% |
| Sep 22 | 70°F | 43°F | 90°F 1897 | 24°F 1934 | 25% | 3% |
| Sep 23 | 69°F | 43°F | 92°F 2009 | 20°F 1934 | 25% | 3% |
| Sep 24 | 69°F | 42°F | 91°F 2009 | 10°F 1926 | 25% | 4% |
| Sep 25 | 68°F | 42°F | 92°F 2014 | 17°F 1934 | 25% | 4% |
| Sep 26 | 68°F | 42°F | 89°F 2024 | 20°F 1934 | 25% | 4% |
| Sep 27 | 67°F | 42°F | 86°F 1897 | 24°F 1935 | 25% | 4% |
| Sep 28 | 67°F | 41°F | 88°F 1892 | 27°F 1916 | 25% | 5% |
| Sep 29 | 66°F | 41°F | 84°F 1932 | 24°F 1919 | 25% | 5% |
| Sep 30 | 66°F | 41°F | 90°F 2011 | 27°F 2019 | 25% | 5% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- September 1
- sunrise 6:44 AM, sunset 8:05 PM
- September 30
- sunrise 7:23 AM, sunset 7:06 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00243749 (Great Falls 16ST), public domain. Records: NOAA GHCN-Daily, station USC00243749, 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.