September weather in Nashua, NH
The average temperature in Nashua in September is 63.7°F (52.2°F–75.2°F). Average precipitation: 4.15 inches.
September is a fall month in Nashua, and is warmer than the annual average of 48.8°F. Daily temperatures swing about 23°F between overnight low and afternoon high. Daylight averages about 12h 16m. For travel, September is a comfortable month to visit.
Avg High
75.2°F
Avg Low
52.2°F
Precipitation
4.15 in
Daylight
12h 16m
September records in Nashua
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 89.1°F (2015) | 45.0°F (2017) | 0.10 in (2014) |
| September 2 | 91.0°F (2015) | 37.9°F (2017) | 3.16 in (2021) |
| September 3 | 93.9°F (2015) | 42.1°F (2024) | 0.37 in (2014) |
| September 4 | 93.9°F (2018) | 44.1°F (2024) | 1.11 in (2017) |
| September 5 | 91.0°F (2022) | 46.0°F (2024) | 0.18 in (2025) |
| September 6 | 93.0°F (2018) | 51.1°F (2019) | 1.71 in (2022) |
| September 7 | 93.9°F (2018) | 51.1°F (2019) | 1.79 in (2014) |
| September 8 | 93.9°F (2015) | 43.0°F (2025) | 0.30 in (2025) |
| September 9 | 93.9°F (2015) | 44.1°F (2024) | 0.49 in (2023) |
| September 10 | 93.9°F (2015) | 46.0°F (2017) | 1.76 in (2021) |
| September 11 | 88.0°F (2022) | 42.1°F (2024) | 1.93 in (2020) |
| September 12 | 86.0°F (2019) | 42.1°F (2024) | 5.25 in (2023) |
| September 13 | 84.0°F (2017) | 43.0°F (2020) | 0.59 in (2021) |
| September 14 | 87.1°F (2024) | 39.9°F (2019) | 0.38 in (2023) |
| September 15 | 87.1°F (2016) | 37.9°F (2020) | 0.22 in (2019) |
| September 16 | 87.1°F (2016) | 39.0°F (2022) | 0.26 in (2021) |
| September 17 | 89.1°F (2018) | 39.9°F (2022) | 0.09 in (2014) |
| September 18 | 89.1°F (2015) | 39.9°F (2014) | 2.43 in (2018) |
| September 19 | 87.1°F (2015) | 34.0°F (2019) | 2.00 in (2023) |
| September 20 | 82.9°F (2015) | 28.9°F (2020) | 0.63 in (2022) |
| September 21 | 86.0°F (2016) | 32.0°F (2020) | 0.66 in (2014) |
| September 22 | 87.1°F (2019) | 30.9°F (2020) | 0.53 in (2024) |
| September 23 | 88.0°F (2016) | 37.9°F (2014) | 0.90 in (2022) |
| September 24 | 90.0°F (2019) | 42.1°F (2018) | 0.40 in (2016) |
| September 25 | 93.0°F (2017) | 39.0°F (2022) | 0.66 in (2025) |
| September 26 | 91.0°F (2017) | 34.0°F (2016) | 0.98 in (2018) |
| September 27 | 90.0°F (2017) | 33.1°F (2015) | 1.02 in (2018) |
| September 28 | 91.0°F (2017) | 39.9°F (2023) | 0.20 in (2020) |
| September 29 | 86.0°F (2014) | 39.9°F (2017) | 0.11 in (2021) |
| September 30 | 84.0°F (2015) | 39.0°F (2018) | 1.38 in (2015) |