Owyhee Weather in September
Average highs run from 79°F on September 1 to 67°F on September 30, and lows from 35°F to 27°F. Normal precipitation for the month is 0.56 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
- 74°F
- Average low
- 31°F
- Precipitation
- 0.56 in
- Snowfall
- 0.3 in
- Record high
- 98°FSep 4, 2017
- Record low
- 5°FSep 24, 2000
- Chance of a freeze
- 100%
- Daylight
- 13 h 08 min to 11 h 47 min
- Cloud cover
- 36%
- Humidity
- 39%
- Dew point
- 31°F
- Wind
- 7.8 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 | 35°F | 94°F 1991 | 20°F 2008 | 12% | 0% |
| Sep 2 | 79°F | 35°F | 91°F 1987 | 18°F 2008 | 12% | 0% |
| Sep 3 | 79°F | 34°F | 94°F 2017 | 22°F 2008 | 13% | 0% |
| Sep 4 | 78°F | 34°F | 98°F 2017 | 18°F 1999 | 13% | 0% |
| Sep 5 | 78°F | 34°F | 96°F 2020 | 20°F 1999 | 13% | 0% |
| Sep 6 | 77°F | 33°F | 91°F 2017 | 15°F 2008 | 13% | 0% |
| Sep 7 | 77°F | 33°F | 90°F 2021 | 16°F 2009 | 13% | 0% |
| Sep 8 | 77°F | 33°F | 93°F 2021 | 13°F 2009 | 14% | 1% |
| Sep 9 | 76°F | 33°F | 92°F 2021 | 14°F 2009 | 14% | 1% |
| Sep 10 | 76°F | 32°F | 88°F 1990 | 20°F 2016 | 14% | 1% |
| Sep 11 | 76°F | 32°F | 88°F 1990 | 22°F 1989 | 14% | 1% |
| Sep 12 | 75°F | 32°F | 88°F 1990 | 16°F 2008 | 14% | 1% |
| Sep 13 | 75°F | 31°F | 88°F 2000 | 17°F 2012 | 15% | 1% |
| Sep 14 | 74°F | 31°F | 88°F 2000 | 11°F 2012 | 15% | 1% |
| Sep 15 | 74°F | 31°F | 87°F 1995 | 14°F 2008 | 15% | 1% |
| Sep 16 | 74°F | 31°F | 84°F 2020 | 18°F 2017 | 15% | 1% |
| Sep 17 | 73°F | 30°F | 84°F 2020 | 12°F 2006 | 15% | 1% |
| Sep 18 | 73°F | 30°F | 83°F 2008 | 13°F 1988 | 15% | 1% |
| Sep 19 | 72°F | 30°F | 85°F 1984 | 13°F 1988 | 15% | 1% |
| Sep 20 | 72°F | 30°F | 82°F 1984 | 13°F 1983 | 16% | 1% |
| Sep 21 | 72°F | 29°F | 82°F 1991 | 9°F 2009 | 16% | 2% |
| Sep 22 | 71°F | 29°F | 83°F 1987 | 10°F 1995 | 16% | 2% |
| Sep 23 | 71°F | 29°F | 84°F 1987 | 13°F 1988 | 16% | 2% |
| Sep 24 | 70°F | 29°F | 86°F 1987 | 5°F 2000 | 16% | 2% |
| Sep 25 | 70°F | 28°F | 85°F 1987 | 10°F 2000 | 16% | 2% |
| Sep 26 | 69°F | 28°F | 85°F 2015 | 16°F 2000 | 16% | 2% |
| Sep 27 | 69°F | 28°F | 87°F 2010 | 10°F 1999 | 16% | 2% |
| Sep 28 | 68°F | 28°F | 85°F 2010 | 8°F 1999 | 16% | 2% |
| Sep 29 | 68°F | 27°F | 91°F 1992 | 12°F 1999 | 17% | 2% |
| Sep 30 | 67°F | 27°F | 86°F 2010 | 13°F 2021 | 17% | 2% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:10 AM, sunset 7:18 PM
- September 30
- sunrise 6:40 AM, sunset 6:27 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00269072 (Wild Horse Rsvr), public domain. Records: NOAA GHCN-Daily, station USC00269072, 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.