Edgartown, MA weather in September
Edgartown is mild in September, with some rain: highs average 74°F and nights drop to about 58°F. Expect about 9 wet days. A great month for outdoor plans.
- Normal high
- 74°F
- Normal low
- 58°F
- Wet days
- 9
- 3.9 in total
- Daylight
- 12.5 h
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 78°F | 69°F |
| Normal low | 62°F | 54°F |
| Chance of a wet day | 28% | 34% |
| Sunrise / sunset | 6:08 am / 7:15 pm | 6:37 am / 6:26 pm |
| Daylight | 13.1 h | 11.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical September day
- 6 am58°Fdew point 55°F
- 9 am67°Fdew point 57°F
- Noon71°Fdew point 56°F
- 3 pm71°Fdew point 56°F
- 6 pm65°Fdew point 57°F
- 9 pm60°Fdew point 56°F
NOAA hourly normals (local standard time) from Plymouth Muni Airport (38 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F (temperature only: no humidity station nearby)26 of 30
- Beach dayshigh 80-95°F, under 0.05 in of rain (temperature and rain only)4 of 30
- Hot dayshigh 90°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow9 of 30
- Notable rainat least 0.10 in5 of 30
- Freezing nightslow 32°F or below0 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 3.9 in; a dry September brings about 2.2 in and a wet one about 4.5 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202005: average high 78°F
- Coolest September1996: average high 71°F
- Wettest September1996: 12.6 in
- Driest September2013: 0.3 in
- Highest reading92°F (September 2, 2010)
- Lowest reading34°F (September 29, 1991)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 80°F | 74°F | 64°F |
| Normal low | 64°F | 58°F | 48°F |
| Wet days | 9 | 9 | 11 |
| Comfortable days | 18 | 26 | 15 |
| Daylight | 13.8 h | 12.5 h | 11.1 h |
Highs change by -6°F from August and -10°F into October.
How Edgartown ranks in September
- Normal high299th warmest of 378 cities; 4th of 9 in Massachusetts
- Wet days268th driest of 378
What to pack for Edgartown in September
- A rain jacket or umbrella – rain on about 9 days
Heating and cooling
September has 52 heating degree days and 88 cooling degree days (base 65°F), 2% of the year's total heating and cooling demand.
Questions
How hot is Edgartown in September?
The normal high is 74°F and the normal low is 58°F. From 1991 to 2020 the hottest September reading was 92°F (September 2, 2010).
Does it rain a lot in Edgartown in September?
About 9 days in September have at least 0.01 in of precipitation, and the normal total is 3.9 in. The wettest September in 1991-2020 was in 1996 (12.6 in); the driest was in 2013 (0.3 in).
Is September a good time to visit Edgartown?
September ranks 2nd of 12 months on our comfort score for Edgartown (83 out of 100). It has about 26 comfortable days (judged by temperature only). The best months are June and September.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Edgartown (USC00192501), 0.3 mi SW of the city center, 30 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Plymouth Muni Airport (USW00054769), 38 mi NNW of the city center, 149 ft (135 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Not available for this location: cloud cover and daily humidity and wind (no station close enough or similar enough in elevation).