Nashua weather in September: Nashua, New Hampshire: normal highs, lows, rain and records for September
Nashua in September has a normal high of 75°F and a normal low of 52°F, a daily mean of 64°F, falling from 80°F on the 1st to 69°F by the 30th. The month brings 4.15 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 24°C and low of 11°C, 105 mm of precipitation in September.
- NOAA stationNashua Cwsu
- Station IDUSC00275703
- Location42.73°N 71.48°W
- Elevation180 ft (55 m)
- From the center1 miles
- Population91,851
- Jan 35° 14°
- Feb 38° 16°
- Mar 45° 24°
- Apr 58° 35°
- May 69° 46°
- Jun 79° 56°
- Jul 85° 62°
- Aug 83° 60°
- Sep 75° 52°
- Oct 62° 39°
- Nov 51° 29°
- Dec 40° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Nashua in September?
The normal high is 75°F and the normal low 52°F, for a daily mean of 63.7°F. September is 7.5°F cooler than August and 13.1°F warmer than October. September is the 4th warmest month of the year in Nashua and the 4th wettest. Across the month the normal high falls 11°F, from 80°F on September 1 to 69°F on September 30.
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 80°F | 57°F | – | – |
| September 8 | 78°F | 55°F | – | – |
| September 15 | 76°F | 53°F | – | – |
| September 22 | 73°F | 50°F | – | – |
| September 30 | 69°F | 46°F | – | – |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 80°F | 57°F | – | – | 13 h 10 min |
| September 2 | 80°F | 57°F | – | – | 13 h 10 min |
| September 3 | 80°F | 57°F | – | – | 13 h 10 min |
| September 4 | 80°F | 57°F | – | – | 13 h |
| September 5 | 79°F | 56°F | – | – | 13 h |
| September 6 | 79°F | 56°F | – | – | 13 h |
| September 7 | 79°F | 56°F | – | – | 13 h |
| September 8 | 78°F | 55°F | – | – | 12 h 50 min |
| September 9 | 78°F | 55°F | – | – | 12 h 50 min |
| September 10 | 78°F | 55°F | – | – | 12 h 50 min |
| September 11 | 77°F | 54°F | – | – | 12 h 50 min |
| September 12 | 77°F | 54°F | – | – | 12 h 40 min |
| September 13 | 77°F | 54°F | – | – | 12 h 40 min |
| September 14 | 76°F | 53°F | – | – | 12 h 40 min |
| September 15 | 76°F | 53°F | – | – | 12 h 30 min |
| September 16 | 75°F | 52°F | – | – | 12 h 30 min |
| September 17 | 75°F | 52°F | – | – | 12 h 30 min |
| September 18 | 75°F | 52°F | – | – | 12 h 30 min |
| September 19 | 74°F | 51°F | – | – | 12 h 20 min |
| September 20 | 74°F | 51°F | – | – | 12 h 20 min |
| September 21 | 73°F | 50°F | – | – | 12 h 20 min |
| September 22 | 73°F | 50°F | – | – | 12 h 10 min |
| September 23 | 72°F | 49°F | – | – | 12 h 10 min |
| September 24 | 72°F | 49°F | – | – | 12 h 10 min |
| September 25 | 71°F | 48°F | – | – | 12 h 10 min |
| September 26 | 71°F | 48°F | – | – | 12 h |
| September 27 | 70°F | 47°F | – | – | 12 h |
| September 28 | 70°F | 47°F | – | – | 12 h |
| September 29 | 70°F | 46°F | – | – | 11 h 50 min |
| September 30 | 69°F | 46°F | – | – | 11 h 50 min |
- Normal high
- 75°FSeptember average
- Normal low
- 52°FSeptember average
- Precipitation
- 4.15 inmonth total
- Days at 90°F or more
- 3
- Nights at 32°F or colder
- 1
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 25
- Days at 80°F or more
- 12
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00275703; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Nashua in September?
In a normal September in Nashua, 3 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00275703.
What are the records for September in Nashua?
The September mean against the 1991-2020 normal of 63.7°F: 2021 65.1°F (+1.4), 2022 61.9°F (−1.9), 2023 64.3°F (+0.6), 2024 63.1°F (−0.6), 2025 63.7°F (at normal), 2026 61.7°F (−2.0). 2 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 65.1°F | +1.4°F | 6.64 in |
| 2022 | 61.9°F | −1.9°F | 4.15 in |
| 2023 | 64.3°F | +0.6°F | 10.49 in |
| 2024 | 63.1°F | −0.6°F | 1.32 in |
| 2025 | 63.7°F | at normal | 2.66 in |
| 2026 | 61.7°F | −2.0°F | 3.92 in |
Source: recent months: ACIS, station USC00275703. Records and recent months use complete months only.
How does September in Nashua compare across New Hampshire?
Across the 28 places PlainClimate covers in New Hampshire, September normal highs run from 68°F in Colebrook to 75°F in Nashua; Nashua's is 75°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.