Nantucket County Weather in August
Average highs run from 77°F on August 1 to 74°F on August 31, and lows from 64°F to 60°F. Normal precipitation for the month is 3.00 in over about 13 wet days.
August day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
August at a glance
- Average high
- 76°F
- Average low
- 62°F
- Precipitation
- 3.00 in
- Record high
- 100°FAug 2, 1975
- Record low
- 39°FAug 31, 1965
- Chance of a freeze
- 0%
- Daylight
- 14 h 22 min to 13 h 08 min
- Cloud cover
- 60%
- Humidity
- 87%
- Dew point
- 65°F
- Wind
- 12.3 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Aug 1 | 77°F | 64°F | 88°F 1975 | 53°F 1961 | 41% |
| Aug 2 | 77°F | 64°F | 100°F 1975 | 52°F 2010 | 41% |
| Aug 3 | 77°F | 64°F | 97°F 1975 | 51°F 2025 | 41% |
| Aug 4 | 77°F | 64°F | 84°F 1971 | 51°F 2025 | 41% |
| Aug 5 | 77°F | 64°F | 88°F 1979 | 45°F 1972 | 41% |
| Aug 6 | 77°F | 64°F | 86°F 2010 | 43°F 1972 | 41% |
| Aug 7 | 77°F | 64°F | 85°F 2022 | 53°F 1953 | 42% |
| Aug 8 | 77°F | 63°F | 89°F 2021 | 53°F 2025 | 42% |
| Aug 9 | 76°F | 63°F | 91°F 1977 | 52°F 1955 | 42% |
| Aug 10 | 76°F | 63°F | 92°F 1949 | 50°F 1964 | 42% |
| Aug 11 | 76°F | 63°F | 88°F 1949 | 54°F 1968 | 42% |
| Aug 12 | 76°F | 63°F | 87°F 1975 | 53°F 1950 | 42% |
| Aug 13 | 76°F | 63°F | 86°F 2020 | 50°F 1971 | 42% |
| Aug 14 | 76°F | 63°F | 87°F 2021 | 50°F 1971 | 43% |
| Aug 15 | 76°F | 63°F | 84°F 1975 | 46°F 1972 | 43% |
| Aug 16 | 76°F | 63°F | 87°F 2018 | 45°F 1972 | 43% |
| Aug 17 | 76°F | 63°F | 83°F 2015 | 51°F 1949 | 43% |
| Aug 18 | 76°F | 62°F | 84°F 1978 | 47°F 1968 | 43% |
| Aug 19 | 76°F | 62°F | 83°F 2022 | 46°F 1968 | 43% |
| Aug 20 | 76°F | 62°F | 84°F 2021 | 44°F 1976 | 42% |
| Aug 21 | 75°F | 62°F | 86°F 1968 | 49°F 1972 | 42% |
| Aug 22 | 75°F | 62°F | 92°F 1976 | 46°F 1969 | 42% |
| Aug 23 | 75°F | 62°F | 84°F 1976 | 49°F 2004 | 42% |
| Aug 24 | 75°F | 62°F | 83°F 2021 | 49°F 2004 | 42% |
| Aug 25 | 75°F | 61°F | 89°F 2021 | 45°F 1971 | 42% |
| Aug 26 | 75°F | 61°F | 92°F 1948 | 48°F 2004 | 42% |
| Aug 27 | 75°F | 61°F | 92°F 2021 | 48°F 1969 | 42% |
| Aug 28 | 74°F | 61°F | 95°F 1948 | 51°F 1969 | 42% |
| Aug 29 | 74°F | 61°F | 86°F 1948 | 50°F 1957 | 42% |
| Aug 30 | 74°F | 61°F | 90°F 2018 | 42°F 1965 | 42% |
| Aug 31 | 74°F | 60°F | 87°F 1973 | 39°F 1965 | 42% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- August 1
- sunrise 5:35 AM, sunset 7:57 PM
- August 31
- sunrise 6:06 AM, sunset 7:14 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00014756 (Nantucket Mem AP), public domain. Records: NOAA GHCN-Daily, station USW00014756, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.