Circle Weather in September
Average highs run from 82°F on September 1 to 68°F on September 30, and lows from 51°F to 40°F. Normal precipitation for the month is 1.33 in over about 5 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
- 76°F
- Average low
- 45°F
- Precipitation
- 1.33 in
- Record high
- 106°FSep 1, 1983
- Record low
- 14°FSep 29, 1907
- Chance of a freeze
- 77%
- Days of 90°F or more
- 3.6
- Daylight
- 13 h 21 min to 11 h 44 min
- Cloud cover
- 54%
- Humidity
- 53%
- Dew point
- 40°F
- Wind
- 11.0 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 | 82°F | 51°F | 106°F 1983 | 34°F 1902 | 14% | 0% |
| Sep 2 | 82°F | 50°F | 104°F 1983 | 34°F 1902 | 14% | 0% |
| Sep 3 | 81°F | 50°F | 102°F 1940 | 34°F 1974 | 14% | 0% |
| Sep 4 | 81°F | 49°F | 102°F 1945 | 29°F 1956 | 14% | 0% |
| Sep 5 | 80°F | 49°F | 104°F 1950 | 32°F 1965 | 14% | 0% |
| Sep 6 | 80°F | 49°F | 103°F 1976 | 30°F 1956 | 14% | 0% |
| Sep 7 | 80°F | 48°F | 101°F 1893 | 28°F 1929 | 14% | 0% |
| Sep 8 | 79°F | 48°F | 100°F 2022 | 28°F 1929 | 14% | 0% |
| Sep 9 | 79°F | 48°F | 99°F 2005 | 33°F 1929 | 15% | 0% |
| Sep 10 | 78°F | 47°F | 101°F 1998 | 28°F 1955 | 15% | 0% |
| Sep 11 | 78°F | 47°F | 96°F 1966 | 25°F 1955 | 15% | 0% |
| Sep 12 | 77°F | 47°F | 98°F 1894 | 27°F 1989 | 15% | 0% |
| Sep 13 | 77°F | 46°F | 97°F 1990 | 22°F 1949 | 15% | |
| Sep 14 | 77°F | 46°F | 96°F 1935 | 23°F 1949 | 15% | |
| Sep 15 | 76°F | 45°F | 96°F 1948 | 26°F 1934 | 15% | |
| Sep 16 | 76°F | 45°F | 97°F 1948 | 24°F 1901 | 15% | |
| Sep 17 | 75°F | 45°F | 96°F 1976 | 27°F 1965 | 15% | |
| Sep 18 | 75°F | 44°F | 96°F 2024 | 29°F 1991 | 16% | |
| Sep 19 | 74°F | 44°F | 95°F 1937 | 24°F 1918 | 16% | |
| Sep 20 | 74°F | 44°F | 94°F 2009 | 25°F 1913 | 16% | |
| Sep 21 | 73°F | 43°F | 94°F 1917 | 22°F 1995 | 16% | |
| Sep 22 | 73°F | 43°F | 97°F 1938 | 23°F 1995 | 16% | |
| Sep 23 | 72°F | 43°F | 96°F 1917 | 26°F 1995 | 16% | |
| Sep 24 | 72°F | 42°F | 94°F 1938 | 24°F 1926 | 16% | |
| Sep 25 | 71°F | 42°F | 94°F 2014 | 18°F 1926 | 16% | |
| Sep 26 | 70°F | 41°F | 96°F 2014 | 22°F 1900 | 16% | |
| Sep 27 | 70°F | 41°F | 96°F 1898 | 20°F 1928 | 15% | |
| Sep 28 | 69°F | 41°F | 95°F 2021 | 24°F 1908 | 15% | |
| Sep 29 | 69°F | 40°F | 95°F 2021 | 14°F 1907 | 15% | |
| Sep 30 | 68°F | 40°F | 97°F 2024 | 22°F 1985 | 15% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- September 1
- sunrise 6:21 AM, sunset 7:42 PM
- September 30
- sunrise 7:00 AM, sunset 6:44 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00241758 (Circle), public domain. Records: NOAA GHCN-Daily, station USC00243581, 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.