Nantucket weather in July: Nantucket, Massachusetts: normal highs, lows, rain and records for July
Nantucket in July has a normal high of 75°F and a normal low of 63°F, a daily mean of 69°F, rising from 73°F on the 1st to 77°F by the 31st. Measurable precipitation falls on 12 days in a normal July, 2.72 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 24°C and low of 17°C, 69 mm of precipitation in July.
- 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 July?
The normal high is 75°F and the normal low 63°F, for a daily mean of 69.0°F. July is 6.8°F warmer than June and 0.0°F cooler than August. July is the warmest month of the year in Nantucket and the 12th wettest. Across the month the normal high rises 4°F, from 73°F on July 1 to 77°F on July 31. From one year to the next July's mean temperature typically moves about 1.8°F either way (NOAA's standard deviation), so roughly two Julys 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 41%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 73°F | 60°F | 38% | 15% |
| July 8 | 75°F | 62°F | 38% | 14% |
| July 15 | 76°F | 63°F | 38% | 13% |
| July 22 | 76°F | 64°F | 39% | 14% |
| July 31 | 77°F | 64°F | 41% | 15% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 27, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 73°F | 60°F | 38% | 15% | 15 h 10 min |
| July 2 | 73°F | 60°F | 38% | 14% | 15 h 10 min |
| July 3 | 74°F | 61°F | 38% | 14% | 15 h 10 min |
| July 4 | 74°F | 61°F | 38% | 14% | 15 h |
| July 5 | 74°F | 61°F | 38% | 14% | 15 h |
| July 6 | 74°F | 61°F | 38% | 14% | 15 h |
| July 7 | 74°F | 62°F | 38% | 14% | 15 h |
| July 8 | 75°F | 62°F | 38% | 14% | 15 h |
| July 9 | 75°F | 62°F | 38% | 14% | 15 h |
| July 10 | 75°F | 62°F | 38% | 13% | 15 h |
| July 11 | 75°F | 62°F | 38% | 13% | 15 h |
| July 12 | 75°F | 62°F | 38% | 13% | 15 h |
| July 13 | 75°F | 63°F | 38% | 13% | 15 h |
| July 14 | 76°F | 63°F | 38% | 13% | 14 h 50 min |
| July 15 | 76°F | 63°F | 38% | 13% | 14 h 50 min |
| July 16 | 76°F | 63°F | 38% | 14% | 14 h 50 min |
| July 17 | 76°F | 63°F | 38% | 14% | 14 h 50 min |
| July 18 | 76°F | 63°F | 39% | 14% | 14 h 50 min |
| July 19 | 76°F | 63°F | 39% | 14% | 14 h 50 min |
| July 20 | 76°F | 63°F | 39% | 14% | 14 h 50 min |
| July 21 | 76°F | 64°F | 39% | 14% | 14 h 40 min |
| July 22 | 76°F | 64°F | 39% | 14% | 14 h 40 min |
| July 23 | 76°F | 64°F | 40% | 15% | 14 h 40 min |
| July 24 | 76°F | 64°F | 40% | 15% | 14 h 40 min |
| July 25 | 77°F | 64°F | 40% | 15% | 14 h 40 min |
| July 26 | 77°F | 64°F | 40% | 15% | 14 h 40 min |
| July 27 | 77°F | 64°F | 40% | 15% | 14 h 30 min |
| July 28 | 77°F | 64°F | 40% | 15% | 14 h 30 min |
| July 29 | 77°F | 64°F | 40% | 15% | 14 h 30 min |
| July 30 | 77°F | 64°F | 41% | 15% | 14 h 30 min |
| July 31 | 77°F | 64°F | 41% | 15% | 14 h 30 min |
- Normal high
- 75°FJuly average
- Normal low
- 63°FJuly average
- Precipitation
- 2.72 inmonth total
- Days with precipitation
- 120.01 inch or more
- Daylight
- 15 h 10 min to 14 h 30 minJuly 1 to July 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 July?
On a given July day the chance of 0.01 inch or more is 39% on average, highest around July 31 (41%). In all, 2.72 in falls on 12 days of a normal July, 1 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014756.
What are the records for July in Nantucket?
The warmest July temperature on this station's record (since 1948) is 92°F, on July 1, 1964; the coldest is 47°F, on July 8, 1972. The wettest July brought 7.45 in (1958).
The July mean against the 1991-2020 normal of 69.0°F: 2021 71.6°F (+2.6), 2022 73.7°F (+4.7), 2023 71.1°F (+2.1), 2024 71.5°F (+2.5), 2025 69.7°F (+0.7), 2026 68.9°F (−0.1). 5 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 71.6°F | +2.6°F | – |
| 2022 | 73.7°F | +4.7°F | 2.50 in |
| 2023 | 71.1°F | +2.1°F | 0.97 in |
| 2024 | 71.5°F | +2.5°F | 2.65 in |
| 2025 | 69.7°F | +0.7°F | 0.70 in |
| 2026 | 68.9°F | −0.1°F | 2.87 in |
Source: records: ACIS, station USW00014756; recent months: ACIS, station USW00014756. Records and recent months use complete months only.
How does July in Nantucket compare across Massachusetts?
Across the 35 places PlainClimate covers in Massachusetts, July normal highs run from 75°F in Nantucket to 87°F in Maynard; Nantucket's is 75°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.