Nantucket, MA weather in August
In August, Nantucket sees highs around 76°F and lows around 62°F: mild, with frequent rain. There are about 13 days with rain. It is one of the warmest months in Nantucket.
- Normal high
- 76°F
- Normal low
- 62°F
- Wet days
- 13
- 3.0 in total
- Daylight
- 13.8 h
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 77°F | 74°F |
| Normal low | 64°F | 60°F |
| Chance of a wet day | 41% | 42% |
| Sunrise / sunset | 5:35 am / 7:57 pm | 6:05 am / 7:15 pm |
| Daylight | 14.4 h | 13.2 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 August day
- 6 am65°Fdew point 62°F
- 9 am74°Fdew point 62°F
- Noon78°Fdew point 62°F
- 3 pm78°Fdew point 62°F
- 6 pm73°Fdew point 62°F
- 9 pm67°Fdew point 63°F
NOAA hourly normals (local standard time) from Plymouth Muni Airport (54 mi away); average wind 6 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F (temperature only: no humidity station nearby)27 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain (temperature and rain only)5 of 31
- Hot dayshigh 90°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow13 of 31
- Notable rainat least 0.10 in5 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 3.0 in; a dry August brings about 1.6 in and a wet one about 3.9 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20202015: average high 80°F
- Coolest August2000: average high 73°F
- Wettest August2010: 5.5 in
- Driest August2005: 0.3 in
- Highest reading90°F (August 30, 2018)
- Lowest reading46°F (August 30, 2014)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 75°F | 76°F | 70°F |
| Normal low | 63°F | 62°F | 57°F |
| Wet days | 12 | 13 | 13 |
| Comfortable days | 27 | 27 | 27 |
| Daylight | 14.8 h | 13.8 h | 12.5 h |
Highs change by +1°F from July and -6°F into September.
Nearby alternatives in August
- Warmer: New Bedford, MA50 mi · high 81°F · 13 wet days
- Drier: Edgartown, MA23 mi · high 80°F · 9 wet days
How Nantucket ranks in August
- Normal high351st warmest of 378 cities; 9th of 9 in Massachusetts
- Wet days332nd driest of 378
What to pack for Nantucket in August
- A rain jacket or umbrella – rain on about 13 days
Heating and cooling
August has 11 heating degree days and 137 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Nantucket in August?
The normal high is 76°F and the normal low is 62°F. From 1991 to 2020 the hottest August reading was 90°F (August 30, 2018).
Does it rain a lot in Nantucket in August?
About 13 days in August have at least 0.01 in of precipitation, and the normal total is 3.0 in. The wettest August in 1991-2020 was in 2010 (5.5 in); the driest was in 2005 (0.3 in).
Is August a good time to visit Nantucket?
August ranks 2nd of 12 months on our comfort score for Nantucket (88 out of 100). It has about 27 comfortable days (judged by temperature only). The best months are July and August.
Where the numbers come from
- Temperature, rain and frost dates: Nantucket Mem Airport (USW00014756), 2.9 mi SE of the city center, 45 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Edgartown (USC00192501), 23 mi WNW of the city center, 30 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Plymouth Muni Airport (USW00054769), 54 mi NW of the city center, 149 ft (128 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).