New Hampshire weather in September: Statewide normals and every place, NOAA 1991-2020
In September, New Hampshire's statewide normal high is 70°F and normal low 47°F; normal highs run from 68°F in Colebrook to 75°F in Nashua (NOAA 1991-2020 normals).
- Statewide normal high
- 70°FSeptember, 1991-2020
- Statewide normal low
- 47°FSeptember, 1991-2020
- Statewide normal precipitation
- 3.96 inSeptember
- Warmest place
- 75°Fnormal high, Nashua
- Coolest place
- 68°Fnormal high, Colebrook
Where is New Hampshire warmest and wettest in September?
Nashua has the warmest September afternoons (75°F) and Colebrook the coolest (68°F). Jaffrey gets the most precipitation (4.33 in) and Berlin the least (3.12 in).
Statewide, September averaged 60.5°F in 2021, 58.2°F in 2022, 61.7°F in 2023, 59.9°F in 2024, 59.8°F in 2025, against a 1991-2020 normal of 58.4°F.
| Place | High | Low | Precip. | Snow |
|---|---|---|---|---|
| Manchester | 75°F | 54°F | 3.72 | – |
| Nashua | 75°F | 52°F | 4.15 | – |
| Concord | 74°F | 49°F | 3.63 | 0.0 |
| Rochester | 73°F | 50°F | 3.43 | – |
| Keene | 73°F | 47°F | 4.26 | 0.0 |
| Laconia | 73°F | 52°F | 3.77 | 0.0 |
| Lebanon | 73°F | 49°F | 3.44 | – |
| Durham | 72°F | 50°F | 3.86 | – |
| Berlin | 71°F | 42°F | 3.12 | – |
| Milford | 73°F | 50°F | 4.04 | 0.0 |
| Franklin | 72°F | 48°F | 3.72 | – |
| Hanover | 74°F | 52°F | 3.33 | 0.0 |
| Hudson | 74°F | 51°F | 3.68 | 0.0 |
| Newport | 71°F | 47°F | 3.53 | 0.0 |
| Plymouth | 72°F | 45°F | 3.55 | 0.0 |
| Meredith | 71°F | 52°F | 4.10 | 0.0 |
| Jaffrey | 71°F | 50°F | 4.33 | – |
| Epping | 73°F | 50°F | 3.96 | 0.0 |
| North Conway | 72°F | 48°F | 3.67 | 0.0 |
| Lancaster | 70°F | 45°F | 3.59 | 0.0 |
| Gorham | 70°F | 44°F | 3.52 | – |
| Whitefield | 71°F | 44°F | 3.64 | – |
| Colebrook | 68°F | 43°F | 3.40 | 0.0 |
| Greenville | 70°F | 49°F | 4.25 | 0.0 |
| Bethlehem | 72°F | 42°F | 3.58 | 0.0 |
| Lincoln | 72°F | 47°F | 3.83 | – |
| Walpole | 72°F | 49°F | 3.96 | – |
| Bradford | 71°F | 47°F | 4.13 | 0.0 |
| Benton (5 mi SW) | 69°F | 46°F | 3.52 | 0.0 |
| East Milford | 74°F | 50°F | 4.24 | 0.0 |
| East Sandwich | 72°F | 48°F | 4.67 | – |
| Errol Airport | 68°F | 43°F | 3.65 | – |
| First Connecticut Lake | 66°F | 44°F | 4.00 | 0.0 |
| Grafton | 71°F | 45°F | 3.23 | – |
| Greenland | 72°F | 52°F | 4.08 | 0.0 |
| Hopkinton Lake | 74°F | 47°F | 4.00 | – |
| Jaffrey Silver Ranch Airpark | 73°F | 51°F | 4.26 | – |
| Jefferson | 67°F | 45°F | 3.34 | 0.0 |
| Massabesic Lake | 73°F | 52°F | 3.87 | 0.0 |
| Mount Sunapee | 70°F | 50°F | 4.18 | 0.0 |
| Mount Washington | 49°F | 37°F | 7.66 | 1.2 |
| North Stratford | 70°F | 45°F | 3.60 | 0.0 |
| Pinkham Notch | 68°F | 45°F | 4.99 | 0.0 |
| Salisbury | 71°F | 46°F | 3.92 | – |
| Tamworth 4 | 70°F | 44°F | 4.33 | 0.0 |
| Waterville Valley Nepp | 69°F | 45°F | 4.18 | – |
| Weare | 71°F | 50°F | – | – |
| Weare (2 mi NE) | 73°F | 51°F | 3.74 | – |
| Wentworth | 73°F | 46°F | 3.62 | 0.0 |
| West Hampstead | 73°F | 51°F | 3.95 | 0.0 |
| York Pond | 68°F | 43°F | 3.67 | 0.0 |
Source: NOAA NCEI nClimDiv statewide normals; NOAA NCEI 1991-2020 monthly normals for each station.