Owyhee County Weather in September
Average highs run from 90°F on September 1 to 78°F on September 30, and lows from 54°F to 44°F. Normal precipitation for the month is 0.26 in over about 1 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
- 84°F
- Average low
- 49°F
- Precipitation
- 0.26 in
- Record high
- 103°FSep 1, 1987
- Record low
- 21°FSep 18, 1965
- Chance of a freeze
- 8%
- Days of 90°F or more
- 7.1
- Daylight
- 13 h 09 min to 11 h 46 min
- Cloud cover
- 36%
- Humidity
- 36%
- Dew point
- 31°F
- Wind
- 8.1 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 | 90°F | 54°F | 103°F 1987 | 36°F 1965 | 4% |
| Sep 2 | 89°F | 53°F | 99°F 1978 | 38°F 1975 | 4% |
| Sep 3 | 89°F | 53°F | 103°F 2007 | 38°F 1975 | 4% |
| Sep 4 | 89°F | 53°F | 99°F 1977 | 35°F 1969 | 4% |
| Sep 5 | 88°F | 52°F | 100°F 1976 | 38°F 1940 | 4% |
| Sep 6 | 88°F | 52°F | 102°F 1944 | 36°F 1996 | 4% |
| Sep 7 | 88°F | 52°F | 101°F 1944 | 34°F 1992 | 4% |
| Sep 8 | 87°F | 51°F | 103°F 1944 | 35°F 1941 | 4% |
| Sep 9 | 87°F | 51°F | 97°F 1969 | 34°F 1962 | 4% |
| Sep 10 | 87°F | 51°F | 99°F 1971 | 35°F 1970 | 4% |
| Sep 11 | 86°F | 50°F | 99°F 1990 | 33°F 2005 | 5% |
| Sep 12 | 86°F | 50°F | 103°F 1944 | 34°F 1988 | 5% |
| Sep 13 | 85°F | 50°F | 98°F 1981 | 33°F 1970 | 5% |
| Sep 14 | 85°F | 50°F | 100°F 2000 | 30°F 1970 | 5% |
| Sep 15 | 85°F | 49°F | 99°F 2000 | 31°F 1970 | 5% |
| Sep 16 | 84°F | 49°F | 98°F 1981 | 35°F 1970 | 5% |
| Sep 17 | 84°F | 49°F | 103°F 1981 | 27°F 1965 | 5% |
| Sep 18 | 83°F | 48°F | 99°F 1981 | 21°F 1965 | 5% |
| Sep 19 | 83°F | 48°F | 98°F 1962 | 24°F 1965 | 5% |
| Sep 20 | 83°F | 48°F | 98°F 1962 | 31°F 2004 | 6% |
| Sep 21 | 82°F | 47°F | 98°F 1962 | 27°F 1983 | 6% |
| Sep 22 | 82°F | 47°F | 99°F 1966 | 27°F 1995 | 6% |
| Sep 23 | 81°F | 47°F | 99°F 2011 | 29°F 1996 | 6% |
| Sep 24 | 81°F | 46°F | 99°F 2011 | 29°F 2000 | 6% |
| Sep 25 | 80°F | 46°F | 94°F 1989 | 26°F 1970 | 6% |
| Sep 26 | 80°F | 46°F | 94°F 1963 | 31°F 1970 | 6% |
| Sep 27 | 79°F | 45°F | 92°F 1967 | 30°F 1964 | 7% |
| Sep 28 | 79°F | 45°F | 95°F 1963 | 28°F 1999 | 7% |
| Sep 29 | 78°F | 45°F | 95°F 1963 | 28°F 1999 | 7% |
| Sep 30 | 78°F | 44°F | 98°F 1992 | 26°F 1985 | 7% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (MDT).
- September 1
- sunrise 7:10 AM, sunset 8:19 PM
- September 30
- sunrise 7:41 AM, sunset 7:27 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00101195 (Bruneau), public domain. Records: NOAA GHCN-Daily, station USC00101195, 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.