September weather in Mertzon, TX
The average temperature in Mertzon in September is 74.7°F (62.0°F–87.4°F). Average precipitation: 2.59 inches.
September is a fall month in Mertzon, and is warmer than the annual average of 63.9°F. Daily temperatures swing about 25.4°F between overnight low and afternoon high. Daylight averages about 12h 11m. For travel, September is a comfortable month to visit.
Avg High
87.4°F
Avg Low
62.0°F
Precipitation
2.59 in
Daylight
12h 11m
September records in Mertzon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 102.9°F (2020) | 54.0°F (2017) | 1.88 in (2020) |
| September 2 | 102.9°F (2020) | 54.0°F (2017) | 0.76 in (2016) |
| September 3 | 99.0°F (2023) | 57.9°F (2015) | 0.28 in (2017) |
| September 4 | 100.9°F (2023) | 61.0°F (2009) | 1.11 in (2018) |
| September 5 | 102.9°F (2023) | 61.0°F (2017) | 0.00 in (2011) |
| September 6 | 105.1°F (2023) | 45.0°F (2011) | 0.17 in (2018) |
| September 7 | 100.9°F (2012) | 44.1°F (2011) | 0.95 in (2014) |
| September 8 | 102.0°F (2012) | 46.0°F (2011) | 2.00 in (2018) |
| September 9 | 106.0°F (2023) | 46.9°F (2017) | 2.37 in (2020) |
| September 10 | 102.9°F (2023) | 46.9°F (2020) | 0.54 in (2020) |
| September 11 | 99.0°F (2014) | 46.0°F (2020) | 1.80 in (2020) |
| September 12 | 97.0°F (2023) | 50.0°F (2017) | 1.60 in (2023) |
| September 13 | 98.1°F (2011) | 52.0°F (2017) | 0.01 in (2012) |
| September 14 | 100.0°F (2011) | 51.1°F (2014) | 1.26 in (2012) |
| September 15 | 102.0°F (2017) | 55.0°F (2008) | 0.46 in (2016) |
| September 16 | 93.0°F (2017) | 46.0°F (2008) | 0.39 in (2018) |
| September 17 | 93.9°F (2015) | 45.0°F (2008) | 1.00 in (2023) |
| September 18 | 97.0°F (2021) | 45.0°F (2008) | 0.25 in (2016) |
| September 19 | 97.0°F (2015) | 45.0°F (2008) | 0.21 in (2014) |
| September 20 | 98.1°F (2019) | 51.1°F (2008) | 2.44 in (2013) |
| September 21 | 102.0°F (2021) | 50.0°F (2008) | 1.51 in (2018) |
| September 22 | 95.0°F (2009) | 51.1°F (2013) | 0.10 in (2018) |
| September 23 | 98.1°F (2023) | 39.9°F (2021) | 0.07 in (2019) |
| September 24 | 102.9°F (2023) | 39.9°F (2021) | 0.04 in (2017) |
| September 25 | 100.9°F (2023) | 46.0°F (2009) | 0.86 in (2016) |
| September 26 | 100.9°F (2011) | 46.0°F (2009) | 0.45 in (2016) |
| September 27 | 100.9°F (2011) | 48.9°F (2008) | 0.50 in (2015) |
| September 28 | 100.0°F (2011) | 48.0°F (2008) | 1.30 in (2017) |
| September 29 | 96.1°F (2011) | 37.9°F (2020) | 3.08 in (2012) |
| September 30 | 96.1°F (2011) | 37.9°F (2020) | 0.31 in (2012) |