September weather in Grandfield, OK
The average temperature in Grandfield in September is 76.1°F (63.6°F–88.6°F). Average precipitation: inches.
September is a fall month in Grandfield, and is warmer than the annual average of 63.1°F. Daily temperatures swing about 25°F between overnight low and afternoon high. Daylight averages about 12h 12m. For travel, September is hot.
Avg High
88.6°F
Avg Low
63.6°F
Precipitation
in
Daylight
12h 12m
September records in Grandfield
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 106.0°F (2013) | 60.1°F (2017) | 0.76 in (2020) |
| September 2 | 105.1°F (2012) | 64.9°F (2025) | 1.08 in (2010) |
| September 3 | 106.0°F (2023) | 59.0°F (2025) | 0.09 in (2024) |
| September 4 | 107.1°F (2023) | 55.0°F (2010) | 0.06 in (2018) |
| September 5 | 108.0°F (2023) | 54.0°F (2011) | 0.38 in (2009) |
| September 6 | 102.0°F (2013) | 48.0°F (2011) | 0.57 in (2014) |
| September 7 | 108.0°F (2023) | 51.1°F (2011) | 0.33 in (2018) |
| September 8 | 111.0°F (2023) | 55.9°F (2011) | 2.36 in (2010) |
| September 9 | 100.0°F (2014) | 50.0°F (2020) | 2.30 in (2020) |
| September 10 | 98.1°F (2021) | 50.0°F (2020) | 1.00 in (2016) |
| September 11 | 99.0°F (2021) | 55.0°F (2024) | 0.86 in (2023) |
| September 12 | 105.1°F (2011) | 55.0°F (2014) | 2.34 in (2009) |
| September 13 | 108.0°F (2011) | 51.1°F (2014) | 0.87 in (2009) |
| September 14 | 100.9°F (2017) | 57.9°F (2012) | 0.04 in (2011) |
| September 15 | 99.0°F (2024) | 55.9°F (2011) | 0.41 in (2016) |
| September 16 | 97.0°F (2025) | 53.1°F (2011) | 1.75 in (2011) |
| September 17 | 98.1°F (2015) | 59.0°F (2012) | 1.16 in (2011) |
| September 18 | 100.0°F (2024) | 59.0°F (2012) | 0.84 in (2017) |
| September 19 | 102.9°F (2024) | 55.0°F (2020) | 0.44 in (2023) |
| September 20 | 102.9°F (2021) | 52.0°F (2020) | 1.23 in (2019) |
| September 21 | 100.0°F (2022) | 53.1°F (2013) | 2.90 in (2018) |
| September 22 | 100.9°F (2023) | 48.0°F (2021) | 2.61 in (2024) |
| September 23 | 105.1°F (2023) | 48.0°F (2021) | 0.40 in (2019) |
| September 24 | 98.1°F (2022) | 52.0°F (2009) | 0.67 in (2016) |
| September 25 | 97.0°F (2019) | 48.9°F (2009) | 0.59 in (2017) |
| September 26 | 97.0°F (2019) | 53.1°F (2010) | 4.83 in (2017) |
| September 27 | 98.1°F (2019) | 46.0°F (2010) | 1.48 in (2017) |
| September 28 | 98.1°F (2023) | 48.9°F (2020) | 0.63 in (2013) |
| September 29 | 97.0°F (2011) | 42.1°F (2020) | 0.90 in (2012) |
| September 30 | 97.0°F (2023) | 48.9°F (2020) | 0.02 in (2012) |