September weather in Washington, OK
The average temperature in Washington in September is 73.5°F (61.5°F–85.5°F). Average precipitation: inches.
September is a fall month in Washington, and is warmer than the annual average of 61°F. Daily temperatures swing about 24°F between overnight low and afternoon high. Daylight averages about 12h 12m. For travel, September is a comfortable month to visit.
Avg High
85.5°F
Avg Low
61.5°F
Precipitation
in
Daylight
12h 12m
September records in Washington
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 100.9°F (2012) | 57.9°F (2009) | 3.85 in (2020) |
| September 2 | 102.9°F (2012) | 59.0°F (2023) | 0.59 in (2010) |
| September 3 | 102.9°F (2023) | 57.9°F (2010) | 0.28 in (2018) |
| September 4 | 102.9°F (2012) | 50.0°F (2010) | 3.02 in (2018) |
| September 5 | 105.1°F (2023) | 52.0°F (2010) | 0.60 in (2023) |
| September 6 | 100.0°F (2015) | 51.1°F (2011) | 1.17 in (2014) |
| September 7 | 105.1°F (2012) | 50.0°F (2017) | 0.60 in (2010) |
| September 8 | 104.0°F (2023) | 51.1°F (2024) | 4.89 in (2010) |
| September 9 | 97.0°F (2009) | 48.9°F (2024) | 0.84 in (2020) |
| September 10 | 95.0°F (2023) | 46.9°F (2024) | 0.37 in (2016) |
| September 11 | 96.1°F (2013) | 54.0°F (2012) | 0.61 in (2009) |
| September 12 | 100.0°F (2011) | 50.0°F (2022) | 1.15 in (2009) |
| September 13 | 105.1°F (2011) | 50.0°F (2014) | 0.80 in (2019) |
| September 14 | 96.1°F (2017) | 55.0°F (2014) | 1.22 in (2016) |
| September 15 | 95.0°F (2013) | 53.1°F (2011) | 0.35 in (2018) |
| September 16 | 93.9°F (2019) | 51.1°F (2011) | 0.63 in (2011) |
| September 17 | 97.0°F (2025) | 55.9°F (2023) | 1.03 in (2016) |
| September 18 | 96.1°F (2024) | 54.0°F (2023) | 1.38 in (2016) |
| September 19 | 100.0°F (2024) | 48.9°F (2012) | 0.28 in (2025) |
| September 20 | 102.0°F (2024) | 51.1°F (2020) | 1.50 in (2015) |
| September 21 | 99.0°F (2024) | 53.1°F (2013) | 4.24 in (2018) |
| September 22 | 96.1°F (2012) | 48.9°F (2011) | 1.72 in (2024) |
| September 23 | 99.0°F (2023) | 46.0°F (2021) | 0.17 in (2010) |
| September 24 | 97.0°F (2022) | 46.9°F (2021) | 0.80 in (2016) |
| September 25 | 93.9°F (2012) | 45.0°F (2009) | 0.60 in (2012) |
| September 26 | 95.0°F (2013) | 48.9°F (2011) | 1.58 in (2017) |
| September 27 | 95.0°F (2023) | 45.0°F (2010) | 1.26 in (2017) |
| September 28 | 96.1°F (2023) | 51.1°F (2009) | 1.69 in (2013) |
| September 29 | 97.0°F (2023) | 45.0°F (2009) | 1.05 in (2012) |
| September 30 | 95.0°F (2023) | 46.9°F (2013) | 0.46 in (2012) |