Nantucket weather in August: Nantucket, Massachusetts: normal highs, lows, rain and records for August
Nantucket in August has a normal high of 76°F and a normal low of 62°F, a daily mean of 69°F, falling from 77°F on the 1st to 74°F by the 31st. Measurable precipitation falls on 13 days in a normal August, 3.00 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 24°C and low of 17°C, 76 mm of precipitation in August.
- NOAA stationNantucket Mem Airport
- Station IDUSW00014756
- Location41.25°N 70.06°W
- Elevation45 ft (14 m)
- From the center2 miles
- Population (town)14,670
- Census place10,837
- Jan 40° 27°
- Feb 40° 27°
- Mar 44° 32°
- Apr 52° 39°
- May 61° 47°
- Jun 69° 56°
- Jul 75° 63°
- Aug 76° 62°
- Sep 70° 57°
- Oct 62° 49°
- Nov 53° 40°
- Dec 45° 32°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Nantucket in August?
The normal high is 76°F and the normal low 62°F, for a daily mean of 69.0°F. August is 0.0°F warmer than July and 5.3°F warmer than September. August is the warmest month of the year in Nantucket and the 8th wettest. Across the month the normal high falls 3°F, from 77°F on August 1 to 74°F on August 31. From one year to the next August's mean temperature typically moves about 1.9°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 67°F and 71°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 43%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 77°F | 64°F | 41% | 15% |
| August 8 | 77°F | 63°F | 42% | 15% |
| August 15 | 76°F | 63°F | 43% | 15% |
| August 22 | 75°F | 62°F | 42% | 15% |
| August 31 | 74°F | 60°F | 42% | 15% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 77°F | 64°F | 41% | 15% | 14 h 20 min |
| August 2 | 77°F | 64°F | 41% | 15% | 14 h 20 min |
| August 3 | 77°F | 64°F | 41% | 15% | 14 h 20 min |
| August 4 | 77°F | 64°F | 41% | 15% | 14 h 20 min |
| August 5 | 77°F | 64°F | 41% | 15% | 14 h 20 min |
| August 6 | 77°F | 64°F | 41% | 15% | 14 h 10 min |
| August 7 | 77°F | 64°F | 42% | 15% | 14 h 10 min |
| August 8 | 77°F | 63°F | 42% | 15% | 14 h 10 min |
| August 9 | 76°F | 63°F | 42% | 16% | 14 h 10 min |
| August 10 | 76°F | 63°F | 42% | 16% | 14 h |
| August 11 | 76°F | 63°F | 42% | 16% | 14 h |
| August 12 | 76°F | 63°F | 42% | 16% | 14 h |
| August 13 | 76°F | 63°F | 42% | 15% | 14 h |
| August 14 | 76°F | 63°F | 43% | 15% | 14 h |
| August 15 | 76°F | 63°F | 43% | 15% | 13 h 50 min |
| August 16 | 76°F | 63°F | 43% | 15% | 13 h 50 min |
| August 17 | 76°F | 63°F | 43% | 15% | 13 h 50 min |
| August 18 | 76°F | 62°F | 43% | 15% | 13 h 50 min |
| August 19 | 76°F | 62°F | 43% | 15% | 13 h 40 min |
| August 20 | 76°F | 62°F | 42% | 15% | 13 h 40 min |
| August 21 | 75°F | 62°F | 42% | 15% | 13 h 40 min |
| August 22 | 75°F | 62°F | 42% | 15% | 13 h 40 min |
| August 23 | 75°F | 62°F | 42% | 15% | 13 h 30 min |
| August 24 | 75°F | 62°F | 42% | 14% | 13 h 30 min |
| August 25 | 75°F | 61°F | 42% | 14% | 13 h 30 min |
| August 26 | 75°F | 61°F | 42% | 14% | 13 h 30 min |
| August 27 | 75°F | 61°F | 42% | 14% | 13 h 20 min |
| August 28 | 74°F | 61°F | 42% | 15% | 13 h 20 min |
| August 29 | 74°F | 61°F | 42% | 15% | 13 h 20 min |
| August 30 | 74°F | 61°F | 42% | 15% | 13 h 20 min |
| August 31 | 74°F | 60°F | 42% | 15% | 13 h 10 min |
- Normal high
- 76°FAugust average
- Normal low
- 62°FAugust average
- Precipitation
- 3.00 inmonth total
- Days with precipitation
- 130.01 inch or more
- Daylight
- 14 h 20 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 29
- Days at 80°F or more
- 6
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014756; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Nantucket in August?
On a given August day the chance of 0.01 inch or more is 42% on average, highest around August 14 (43%). In all, 3.00 in falls on 13 days of a normal August, 1 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014756.
What are the records for August in Nantucket?
The warmest August temperature on this station's record (since 1948) is 100°F, on August 2, 1975; the coldest is 39°F, on August 31, 1965. The wettest August brought 6.74 in (1967).
The August mean against the 1991-2020 normal of 69.0°F: 2021 74.5°F (+5.5), 2022 74.4°F (+5.4), 2023 68.6°F (−0.4), 2024 69.3°F (+0.3), 2026 70.9°F (+1.9). 4 of 5 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 74.5°F | +5.5°F | – |
| 2022 | 74.4°F | +5.4°F | 1.12 in |
| 2023 | 68.6°F | −0.4°F | 1.48 in |
| 2024 | 69.3°F | +0.3°F | 0.90 in |
| 2026 | 70.9°F | +1.9°F | 2.53 in |
Source: records: ACIS, station USW00014756; recent months: ACIS, station USW00014756. Records and recent months use complete months only.
How does August in Nantucket compare across Massachusetts?
Across the 35 places PlainClimate covers in Massachusetts, August normal highs run from 76°F in East Sandwich to 85°F in Maynard; Nantucket's is 76°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Nantucket in July75°F by day, 63°F at night
- Nantucket in September70°F by day, 57°F at night
- Nantucket through the yearEvery month, frost dates, records and recent years
- Massachusetts in AugustThe statewide normal and the warmest and coolest places
- Maynard: Massachusetts's warmest Augustnormal high 85°F