Nantucket County Weather in May
Average highs run from 57°F on May 1 to 64°F on May 31, and lows from 43°F to 51°F. Normal precipitation for the month is 2.98 in over about 12 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 61°F
- Average low
- 47°F
- Precipitation
- 2.98 in
- Record high
- 85°FMay 25, 2007
- Record low
- 28°FMay 27, 1972
- Chance of a freeze
- 6%
- Daylight
- 14 h 00 min to 14 h 56 min
- Cloud cover
- 66%
- Humidity
- 89%
- Dew point
- 48°F
- Wind
- 14.1 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 |
|---|---|---|---|---|---|
| May 1 | 57°F | 43°F | 71°F 1974 | 32°F 2000 | 39% |
| May 2 | 57°F | 43°F | 77°F 2001 | 32°F 1967 | 39% |
| May 3 | 58°F | 44°F | 77°F 2001 | 32°F 2015 | 39% |
| May 4 | 58°F | 44°F | 77°F 2001 | 32°F 1948 | 39% |
| May 5 | 58°F | 44°F | 71°F 2015 | 35°F 1957 | 39% |
| May 6 | 58°F | 44°F | 69°F 1982 | 33°F 1967 | 39% |
| May 7 | 59°F | 45°F | 70°F 2015 | 31°F 2001 | 39% |
| May 8 | 59°F | 45°F | 82°F 2000 | 34°F 1973 | 39% |
| May 9 | 59°F | 45°F | 71°F 1963 | 34°F 1974 | 39% |
| May 10 | 59°F | 45°F | 74°F 1979 | 35°F 1975 | 39% |
| May 11 | 60°F | 46°F | 79°F 1970 | 35°F 2010 | 39% |
| May 12 | 60°F | 46°F | 84°F 1970 | 34°F 2010 | 39% |
| May 13 | 60°F | 46°F | 76°F 1956 | 34°F 2010 | 39% |
| May 14 | 60°F | 46°F | 73°F 2021 | 35°F 1954 | 38% |
| May 15 | 61°F | 47°F | 75°F 1976 | 36°F 1964 | 38% |
| May 16 | 61°F | 47°F | 80°F 1974 | 34°F 1964 | 38% |
| May 17 | 61°F | 47°F | 78°F 2015 | 30°F 1957 | 38% |
| May 18 | 61°F | 48°F | 83°F 1977 | 34°F 1956 | 38% |
| May 19 | 61°F | 48°F | 74°F 2003 | 34°F 1974 | 38% |
| May 20 | 62°F | 48°F | 71°F 1960 | 36°F 1950 | 38% |
| May 21 | 62°F | 48°F | 73°F 1962 | 35°F 1950 | 38% |
| May 22 | 62°F | 49°F | 70°F 1951 | 36°F 1950 | 38% |
| May 23 | 62°F | 49°F | 82°F 2021 | 38°F 1967 | 38% |
| May 24 | 63°F | 49°F | 80°F 1975 | 37°F 1972 | 38% |
| May 25 | 63°F | 49°F | 85°F 2007 | 37°F 1956 | 38% |
| May 26 | 63°F | 50°F | 78°F 1965 | 34°F 1972 | 38% |
| May 27 | 63°F | 50°F | 77°F 2014 | 28°F 1972 | 38% |
| May 28 | 64°F | 50°F | 77°F 1959 | 40°F 1968 | 38% |
| May 29 | 64°F | 51°F | 78°F 1975 | 37°F 1967 | 38% |
| May 30 | 64°F | 51°F | 78°F 1978 | 35°F 1970 | 38% |
| May 31 | 64°F | 51°F | 83°F 2022 | 38°F 1974 | 38% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 5:38 AM, sunset 7:38 PM
- May 31
- sunrise 5:10 AM, sunset 8:06 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.