Plymouth weather in July: Plymouth, Massachusetts: normal highs, lows, rain and records for July
Plymouth in July has a normal high of 82°F and a normal low of 62°F, a daily mean of 72°F, rising from 81°F on the 1st to 82°F by the 31st. Measurable precipitation falls on 12 days in a normal July, 3.35 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 17°C, 85 mm of precipitation in July.
- NOAA stationPlymouth Municipal Airport
- Station IDUSW00054769
- Location41.91°N 70.73°W
- Elevation149 ft (45 m)
- Population (town)66,663
- Census place7,852
- Jan 38° 20°
- Feb 40° 21°
- Mar 46° 27°
- Apr 57° 36°
- May 67° 46°
- Jun 76° 55°
- Jul 82° 62°
- Aug 80° 61°
- Sep 73° 53°
- Oct 63° 42°
- Nov 53° 33°
- Dec 43° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Plymouth in July?
The normal high is 82°F and the normal low 62°F, for a daily mean of 71.9°F. July is 6.2°F warmer than June and 1.4°F warmer than August. July is the warmest month of the year in Plymouth and the 11th wettest. Across the month the normal high rises 1°F, from 81°F on July 1 to 82°F on July 31. From one year to the next July's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Julys in three average between 70°F and 74°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 | 81°F | 60°F | 41% | 18% |
| July 8 | 82°F | 61°F | 40% | 18% |
| July 15 | 83°F | 62°F | 39% | 18% |
| July 22 | 83°F | 63°F | 40% | 18% |
| July 31 | 82°F | 63°F | 41% | 18% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 18, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 81°F | 60°F | 41% | 18% | 15 h 10 min |
| July 2 | 81°F | 60°F | 41% | 18% | 15 h 10 min |
| July 3 | 81°F | 60°F | 40% | 18% | 15 h 10 min |
| July 4 | 81°F | 60°F | 40% | 18% | 15 h 10 min |
| July 5 | 81°F | 61°F | 40% | 18% | 15 h 10 min |
| July 6 | 82°F | 61°F | 40% | 18% | 15 h 10 min |
| July 7 | 82°F | 61°F | 40% | 18% | 15 h 10 min |
| July 8 | 82°F | 61°F | 40% | 18% | 15 h 10 min |
| July 9 | 82°F | 61°F | 40% | 18% | 15 h |
| July 10 | 82°F | 61°F | 40% | 18% | 15 h |
| July 11 | 82°F | 62°F | 39% | 18% | 15 h |
| July 12 | 82°F | 62°F | 39% | 18% | 15 h |
| July 13 | 82°F | 62°F | 39% | 18% | 15 h |
| July 14 | 82°F | 62°F | 39% | 18% | 15 h |
| July 15 | 83°F | 62°F | 39% | 18% | 15 h |
| July 16 | 83°F | 62°F | 39% | 18% | 15 h |
| July 17 | 83°F | 62°F | 39% | 18% | 14 h 50 min |
| July 18 | 83°F | 62°F | 39% | 18% | 14 h 50 min |
| July 19 | 83°F | 62°F | 40% | 18% | 14 h 50 min |
| July 20 | 83°F | 62°F | 40% | 18% | 14 h 50 min |
| July 21 | 83°F | 62°F | 40% | 18% | 14 h 50 min |
| July 22 | 83°F | 63°F | 40% | 18% | 14 h 50 min |
| July 23 | 83°F | 63°F | 40% | 18% | 14 h 40 min |
| July 24 | 83°F | 63°F | 40% | 18% | 14 h 40 min |
| July 25 | 83°F | 63°F | 40% | 18% | 14 h 40 min |
| July 26 | 82°F | 63°F | 40% | 18% | 14 h 40 min |
| July 27 | 82°F | 63°F | 40% | 18% | 14 h 40 min |
| July 28 | 82°F | 63°F | 41% | 18% | 14 h 40 min |
| July 29 | 82°F | 63°F | 41% | 18% | 14 h 30 min |
| July 30 | 82°F | 63°F | 41% | 18% | 14 h 30 min |
| July 31 | 82°F | 63°F | 41% | 18% | 14 h 30 min |
- Normal high
- 82°FJuly average
- Normal low
- 62°FJuly average
- Precipitation
- 3.35 inmonth total
- Days with precipitation
- 120.01 inch or more
- Days at 90°F or more
- 4
- Daylight
- 15 h 10 min to 14 h 30 minJuly 1 to July 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 21
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00054769; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Plymouth in July?
On a given July day the chance of 0.01 inch or more is 40% on average, highest around July 31 (41%). In all, 3.35 in falls on 12 days of a normal July, 1 of them with an inch or more.
In a normal July in Plymouth, 4 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00054769.
How humid and windy is Plymouth in July?
At 3 p.m. the normal temperature is 79°F with 57% relative humidity and a dew point of 63°F; at 6 a.m. it is 67°F with 89% humidity. The wind averages 6.4 mph, most often from the south-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 67°F | 64°F | 89% | 4.4 mph | – |
| 9 a.m. | 75°F | 64°F | 67% | 7.7 mph | – |
| noon | 79°F | 63°F | 57% | 9.5 mph | – |
| 3 p.m. | 79°F | 63°F | 57% | 10.0 mph | – |
| 6 p.m. | 75°F | 63°F | 67% | 7.4 mph | – |
| 9 p.m. | 69°F | 64°F | 84% | 4.4 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00054769. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for July in Plymouth?
The warmest July temperature on this station's record (since 1996) is 101°F, on July 6, 2010; the coldest is 45°F, on July 3, 2001. The wettest July brought 7.88 in (2019).
The July mean against the 1991-2020 normal of 71.9°F: 2021 70.3°F (−1.6), 2022 75.6°F (+3.7), 2023 75.4°F (+3.5), 2024 76.2°F (+4.3), 2025 73.9°F (+2.0), 2026 71.6°F (−0.3). 4 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 70.3°F | −1.6°F | 6.87 in |
| 2022 | 75.6°F | +3.7°F | 0.94 in |
| 2023 | 75.4°F | +3.5°F | 3.90 in |
| 2024 | 76.2°F | +4.3°F | 1.40 in |
| 2025 | 73.9°F | +2.0°F | 2.44 in |
| 2026 | 71.6°F | −0.3°F | 5.32 in |
Source: records: ACIS, station USW00054769; recent months: ACIS, station USW00054769. Records and recent months use complete months only.
How does July in Plymouth 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; Plymouth's is 82°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.