Roseau Weather in September
Average highs run from 72°F on September 1 to 60°F on September 30, and lows from 49°F to 37°F. Normal precipitation for the month is 3.00 in over about 11 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
- 66°F
- Average low
- 43°F
- Precipitation
- 3.00 in
- Record high
- 96°FSep 11, 1931
- Record low
- 16°FSep 21, 2012
- Chance of a freeze
- 75%
- Daylight
- 13 h 25 min to 11 h 43 min
- Cloud cover
- 64%
- Humidity
- 71%
- Dew point
- 46°F
- Wind
- 10.7 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 | 72°F | 49°F | 88°F 1921 | 32°F 1909 | 34% |
| Sep 2 | 72°F | 48°F | 90°F 1915 | 30°F 1946 | 35% |
| Sep 3 | 71°F | 48°F | 93°F 1983 | 29°F 1911 | 35% |
| Sep 4 | 71°F | 48°F | 89°F 1915 | 31°F 1918 | 35% |
| Sep 5 | 71°F | 47°F | 94°F 1978 | 29°F 1903 | 35% |
| Sep 6 | 70°F | 47°F | 91°F 1915 | 29°F 1934 | 35% |
| Sep 7 | 70°F | 47°F | 93°F 1976 | 28°F 1912 | 35% |
| Sep 8 | 70°F | 46°F | 84°F 2006 | 26°F 1901 | 35% |
| Sep 9 | 69°F | 46°F | 86°F 1931 | 27°F 1901 | 35% |
| Sep 10 | 69°F | 45°F | 92°F 1952 | 27°F 1917 | 35% |
| Sep 11 | 68°F | 45°F | 96°F 1931 | 26°F 1964 | 35% |
| Sep 12 | 68°F | 45°F | 88°F 1931 | 22°F 1910 | 35% |
| Sep 13 | 68°F | 44°F | 87°F 1952 | 24°F 1975 | 35% |
| Sep 14 | 67°F | 44°F | 87°F 1927 | 26°F 1964 | 35% |
| Sep 15 | 67°F | 43°F | 83°F 1968 | 27°F 2011 | 35% |
| Sep 16 | 66°F | 43°F | 85°F 2006 | 24°F 1934 | 35% |
| Sep 17 | 66°F | 43°F | 84°F 1998 | 25°F 1959 | 35% |
| Sep 18 | 66°F | 42°F | 89°F 1998 | 19°F 1929 | 35% |
| Sep 19 | 65°F | 42°F | 90°F 1914 | 21°F 2012 | 35% |
| Sep 20 | 65°F | 41°F | 89°F 1914 | 24°F 1973 | 35% |
| Sep 21 | 64°F | 41°F | 82°F 1922 | 16°F 2012 | 35% |
| Sep 22 | 64°F | 41°F | 87°F 1922 | 22°F 1974 | 35% |
| Sep 23 | 63°F | 40°F | 84°F 1930 | 22°F 1913 | 35% |
| Sep 24 | 63°F | 40°F | 87°F 2007 | 22°F 1912 | 34% |
| Sep 25 | 62°F | 39°F | 88°F 1992 | 19°F 1939 | 34% |
| Sep 26 | 62°F | 39°F | 84°F 1938 | 18°F 1965 | 34% |
| Sep 27 | 61°F | 38°F | 88°F 1952 | 17°F 1912 | 34% |
| Sep 28 | 61°F | 38°F | 83°F 1922 | 17°F 1912 | 34% |
| Sep 29 | 60°F | 38°F | 80°F 2011 | 19°F 1912 | 33% |
| Sep 30 | 60°F | 37°F | 82°F 2012 | 20°F 1912 | 33% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (CDT).
- September 1
- sunrise 6:40 AM, sunset 8:05 PM
- September 30
- sunrise 7:21 AM, sunset 7:04 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00218679 (Warroad), public domain. Records: NOAA GHCN-Daily, station USC00218679, 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.