September weather in Portland, TX
The average temperature in Portland in September is 80.8°F (72.6°F–89.1°F). Average precipitation: 5.36 inches.
September is a fall month in Portland, and is warmer than the annual average of 72°F. Daily temperatures swing about 16.5°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 12h 9m. For travel, September is a wet month.
Avg High
89.1°F
Avg Low
72.6°F
Precipitation
5.36 in
Daylight
12h 9m
September records in Portland
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 96.1°F (2012) | 72.0°F (2006) | 0.71 in (2015) |
| September 2 | 96.1°F (2020) | 71.1°F (2009) | 0.73 in (2009) |
| September 3 | 100.0°F (2008) | 72.0°F (2009) | 0.83 in (2022) |
| September 4 | 105.1°F (2011) | 72.0°F (2007) | 2.81 in (2024) |
| September 5 | 104.0°F (2011) | 73.0°F (2013) | 0.93 in (2020) |
| September 6 | 97.0°F (2011) | 66.9°F (2011) | 0.59 in (2025) |
| September 7 | 96.1°F (2021) | 61.0°F (2011) | 2.11 in (2010) |
| September 8 | 97.0°F (2023) | 62.1°F (2011) | 0.26 in (2018) |
| September 9 | 99.0°F (2012) | 62.1°F (2011) | 1.47 in (2005) |
| September 10 | 95.0°F (2021) | 64.9°F (2011) | 3.21 in (2009) |
| September 11 | 93.0°F (2010) | 64.9°F (2011) | 0.97 in (2009) |
| September 12 | 96.1°F (2011) | 63.0°F (2017) | 2.99 in (2018) |
| September 13 | 98.1°F (2011) | 63.0°F (2017) | 1.11 in (2021) |
| September 14 | 100.0°F (2008) | 66.9°F (2015) | 1.53 in (2021) |
| September 15 | 93.9°F (2011) | 66.0°F (2015) | 3.15 in (2018) |
| September 16 | 93.9°F (2005) | 64.9°F (2008) | 1.10 in (2018) |
| September 17 | 95.0°F (2005) | 61.0°F (2008) | 1.40 in (2012) |
| September 18 | 97.0°F (2019) | 64.0°F (2008) | 2.74 in (2006) |
| September 19 | 96.1°F (2016) | 64.9°F (2008) | 2.20 in (2010) |
| September 20 | 95.0°F (2016) | 66.0°F (2008) | 6.78 in (2010) |
| September 21 | 97.0°F (2005) | 66.9°F (2012) | 1.17 in (2013) |
| September 22 | 98.1°F (2005) | 64.9°F (2012) | 0.93 in (2014) |
| September 23 | 99.0°F (2005) | 59.0°F (2021) | 1.21 in (2010) |
| September 24 | 105.1°F (2005) | 59.0°F (2021) | 1.85 in (2006) |
| September 25 | 100.9°F (2005) | 64.0°F (2009) | 1.19 in (2024) |
| September 26 | 100.0°F (2011) | 63.0°F (2008) | 1.85 in (2016) |
| September 27 | 100.0°F (2011) | 61.0°F (2008) | 2.05 in (2018) |
| September 28 | 100.9°F (2005) | 59.0°F (2010) | 0.89 in (2014) |
| September 29 | 96.1°F (2005) | 61.0°F (2008) | 1.70 in (2005) |
| September 30 | 91.9°F (2011) | 55.0°F (2020) | 1.46 in (2021) |