Fitchburg weather in September: Fitchburg, Massachusetts: normal highs, lows, rain and records for September
Fitchburg in September has a normal high of 74°F and a normal low of 51°F, a daily mean of 63°F, falling from 79°F on the 1st to 68°F by the 30th. Measurable precipitation falls on 11 days in a normal September, 3.98 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 11°C, 101 mm of precipitation in September.
- NOAA stationFitchburg Municipal Airport
- Station IDUSW00004780
- Location42.55°N 71.76°W
- Elevation348 ft (106 m)
- From the center5 miles
- Population42,145
- Jan 34° 16°
- Feb 37° 17°
- Mar 45° 25°
- Apr 58° 35°
- May 70° 46°
- Jun 78° 56°
- Jul 83° 62°
- Aug 82° 60°
- Sep 74° 51°
- Oct 62° 40°
- Nov 50° 30°
- Dec 40° 22°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Fitchburg in September?
The normal high is 74°F and the normal low 51°F, for a daily mean of 62.8°F. September is 7.9°F cooler than August and 12.1°F warmer than October. September is the 4th warmest month of the year in Fitchburg and the 3rd wettest. Across the month the normal high falls 11°F, from 79°F on September 1 to 68°F on September 30. From one year to the next September's mean temperature typically moves about 2.0°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 61°F and 65°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 40%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 79°F | 57°F | 35% | 18% |
| September 8 | 77°F | 54°F | 36% | 18% |
| September 15 | 75°F | 52°F | 37% | 18% |
| September 22 | 72°F | 49°F | 39% | 19% |
| September 30 | 68°F | 46°F | 40% | 20% |
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 | 79°F | 57°F | 35% | 18% | 13 h 10 min |
| September 2 | 79°F | 56°F | 35% | 18% | 13 h 10 min |
| September 3 | 79°F | 56°F | 35% | 18% | 13 h 10 min |
| September 4 | 78°F | 56°F | 35% | 18% | 13 h |
| September 5 | 78°F | 55°F | 35% | 18% | 13 h |
| September 6 | 78°F | 55°F | 35% | 18% | 13 h |
| September 7 | 78°F | 55°F | 35% | 18% | 13 h |
| September 8 | 77°F | 54°F | 36% | 18% | 12 h 50 min |
| September 9 | 77°F | 54°F | 36% | 18% | 12 h 50 min |
| September 10 | 77°F | 54°F | 36% | 18% | 12 h 50 min |
| September 11 | 76°F | 53°F | 36% | 18% | 12 h 40 min |
| September 12 | 76°F | 53°F | 36% | 18% | 12 h 40 min |
| September 13 | 75°F | 53°F | 36% | 18% | 12 h 40 min |
| September 14 | 75°F | 52°F | 37% | 18% | 12 h 40 min |
| September 15 | 75°F | 52°F | 37% | 18% | 12 h 30 min |
| September 16 | 74°F | 51°F | 37% | 18% | 12 h 30 min |
| September 17 | 74°F | 51°F | 37% | 19% | 12 h 30 min |
| September 18 | 74°F | 51°F | 38% | 19% | 12 h 30 min |
| September 19 | 73°F | 50°F | 38% | 19% | 12 h 20 min |
| September 20 | 73°F | 50°F | 38% | 19% | 12 h 20 min |
| September 21 | 72°F | 49°F | 38% | 19% | 12 h 20 min |
| September 22 | 72°F | 49°F | 39% | 19% | 12 h 10 min |
| September 23 | 71°F | 49°F | 39% | 19% | 12 h 10 min |
| September 24 | 71°F | 48°F | 39% | 20% | 12 h 10 min |
| September 25 | 71°F | 48°F | 39% | 20% | 12 h 10 min |
| September 26 | 70°F | 47°F | 39% | 20% | 12 h |
| September 27 | 70°F | 47°F | 40% | 20% | 12 h |
| September 28 | 69°F | 47°F | 40% | 20% | 12 h |
| September 29 | 69°F | 46°F | 40% | 20% | 11 h 50 min |
| September 30 | 68°F | 46°F | 40% | 20% | 11 h 50 min |
- Normal high
- 74°FSeptember average
- Normal low
- 51°FSeptember average
- Precipitation
- 3.98 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 23
- Days at 80°F or more
- 9
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00004780; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Fitchburg in September?
On a given September day the chance of 0.01 inch or more is 37% on average, highest around September 30 (40%). In all, 3.98 in falls on 11 days of a normal September, 1 of them with an inch or more.
In a normal September in Fitchburg, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00004780.
What are the records for September in Fitchburg?
The warmest September temperature on this station's record (since 1997) is 96°F, on September 11, 2013; the coldest is 32°F, on September 21, 2020. The wettest September brought 12.22 in (2023).
The September mean against the 1991-2020 normal of 62.8°F: 2021 65.2°F (+2.4), 2022 62.8°F (at normal), 2023 65.6°F (+2.8), 2024 64.4°F (+1.6), 2025 63.9°F (+1.1). 4 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 65.2°F | +2.4°F | 5.82 in |
| 2022 | 62.8°F | at normal | 4.75 in |
| 2023 | 65.6°F | +2.8°F | 12.22 in |
| 2024 | 64.4°F | +1.6°F | 0.80 in |
| 2025 | 63.9°F | +1.1°F | – |
Source: records: ACIS, station USW00004780; recent months: ACIS, station USW00004780. Records and recent months use complete months only.
How does September in Fitchburg compare across Massachusetts?
Across the 35 places PlainClimate covers in Massachusetts, September normal highs run from 70°F in East Sandwich to 78°F in Maynard; Fitchburg's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Fitchburg in August82°F by day, 60°F at night
- Fitchburg in October62°F by day, 40°F at night
- Fitchburg through the yearEvery month, frost dates, records and recent years
- Massachusetts in SeptemberThe statewide normal and the warmest and coolest places
- Maynard: Massachusetts's warmest Septembernormal high 78°F