Plymouth weather in December: Plymouth, Massachusetts: normal highs, lows, rain and records for December
Plymouth in December has a normal high of 43°F and a normal low of 26°F, a daily mean of 35°F, falling from 47°F on the 1st to 40°F by the 31st. Measurable precipitation falls on 13 days in a normal December, 4.59 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 6°C and low of −3°C, 117 mm of precipitation in December.
- 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 December?
The normal high is 43°F and the normal low 26°F, for a daily mean of 34.6°F. December is 8.3°F cooler than November and 5.4°F warmer than January. December is the 10th warmest month of the year in Plymouth and the 3rd wettest. Across the month the normal high falls 7°F, from 47°F on December 1 to 40°F on December 31. From one year to the next December's mean temperature typically moves about 3.7°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 31°F and 38°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 |
|---|---|---|---|---|
| December 1 | 47°F | 29°F | 40% | 25% |
| December 8 | 45°F | 28°F | 41% | 25% |
| December 15 | 44°F | 26°F | 41% | 25% |
| December 22 | 42°F | 24°F | 41% | 25% |
| December 31 | 40°F | 23°F | 40% | 24% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 47°F | 29°F | 40% | 25% | 9 h 20 min |
| December 2 | 47°F | 29°F | 40% | 25% | 9 h 20 min |
| December 3 | 47°F | 29°F | 40% | 25% | 9 h 20 min |
| December 4 | 46°F | 29°F | 40% | 25% | 9 h 20 min |
| December 5 | 46°F | 28°F | 40% | 25% | 9 h 20 min |
| December 6 | 46°F | 28°F | 41% | 25% | 9 h 20 min |
| December 7 | 46°F | 28°F | 41% | 25% | 9 h 20 min |
| December 8 | 45°F | 28°F | 41% | 25% | 9 h 10 min |
| December 9 | 45°F | 27°F | 41% | 25% | 9 h 10 min |
| December 10 | 45°F | 27°F | 41% | 25% | 9 h 10 min |
| December 11 | 45°F | 27°F | 41% | 25% | 9 h 10 min |
| December 12 | 44°F | 27°F | 41% | 25% | 9 h 10 min |
| December 13 | 44°F | 26°F | 41% | 25% | 9 h 10 min |
| December 14 | 44°F | 26°F | 41% | 25% | 9 h 10 min |
| December 15 | 44°F | 26°F | 41% | 25% | 9 h 10 min |
| December 16 | 43°F | 26°F | 41% | 25% | 9 h 10 min |
| December 17 | 43°F | 26°F | 41% | 25% | 9 h 10 min |
| December 18 | 43°F | 25°F | 41% | 25% | 9 h 10 min |
| December 19 | 43°F | 25°F | 41% | 25% | 9 h 10 min |
| December 20 | 42°F | 25°F | 41% | 25% | 9 h 10 min |
| December 21 | 42°F | 25°F | 41% | 25% | 9 h 10 min |
| December 22 | 42°F | 24°F | 41% | 25% | 9 h 10 min |
| December 23 | 42°F | 24°F | 41% | 25% | 9 h 10 min |
| December 24 | 41°F | 24°F | 41% | 25% | 9 h 10 min |
| December 25 | 41°F | 24°F | 41% | 24% | 9 h 10 min |
| December 26 | 41°F | 24°F | 41% | 24% | 9 h 10 min |
| December 27 | 41°F | 23°F | 41% | 24% | 9 h 10 min |
| December 28 | 41°F | 23°F | 41% | 24% | 9 h 10 min |
| December 29 | 40°F | 23°F | 40% | 24% | 9 h 10 min |
| December 30 | 40°F | 23°F | 40% | 24% | 9 h 10 min |
| December 31 | 40°F | 23°F | 40% | 24% | 9 h 10 min |
- Normal high
- 43°FDecember average
- Normal low
- 26°FDecember average
- Precipitation
- 4.59 inmonth total
- Days with precipitation
- 130.01 inch or more
- Nights at 32°F or colder
- 24
- Daylight
- 9 h 20 min to 9 h 10 minDecember 1 to December 31
- Sunshine
- 65%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 December?
On a given December day the chance of 0.01 inch or more is 41% on average, highest around December 17 (41%). In all, 4.59 in falls on 13 days of a normal December, 1 of them with an inch or more.
In a normal December in Plymouth, 24 nights fall to freezing and 4 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00054769.
How humid and windy is Plymouth in December?
At 3 p.m. the normal temperature is 37°F with 58% relative humidity and a dew point of 24°F; at 6 a.m. it is 29°F with 76% humidity. The wind averages 8.5 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 29°F | 23°F | 76% | 7.5 mph | – |
| 9 a.m. | 32°F | 24°F | 72% | 8.9 mph | – |
| noon | 37°F | 24°F | 60% | 11.1 mph | – |
| 3 p.m. | 37°F | 24°F | 58% | 10.6 mph | – |
| 6 p.m. | 33°F | 24°F | 69% | 7.4 mph | – |
| 9 p.m. | 31°F | 23°F | 73% | 7.6 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 December in Plymouth?
The warmest December temperature on this station's record (since 1996) is 76°F, on December 7, 1998; the coldest is 3°F, on December 10, 2000. The wettest December brought 9.25 in (2019).
The December mean against the 1991-2020 normal of 34.6°F: 2021 38.4°F (+3.8), 2022 36.3°F (+1.7), 2023 39.6°F (+5.0), 2024 34.7°F (+0.1), 2025 29.4°F (−5.2). 4 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 38.4°F | +3.8°F | 1.65 in |
| 2022 | 36.3°F | +1.7°F | 6.88 in |
| 2023 | 39.6°F | +5.0°F | 4.33 in |
| 2024 | 34.7°F | +0.1°F | 7.01 in |
| 2025 | 29.4°F | −5.2°F | 1.93 in |
Source: records: ACIS, station USW00054769; recent months: ACIS, station USW00054769. Records and recent months use complete months only.
How does December in Plymouth compare across Massachusetts?
Across the 35 places PlainClimate covers in Massachusetts, December normal highs run from 36°F in Pittsfield to 46°F in Edgartown; Plymouth's is 43°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Plymouth in November53°F by day, 33°F at night
- Plymouth in January38°F by day, 20°F at night
- Plymouth through the yearEvery month, frost dates, records and recent years
- Massachusetts in DecemberThe statewide normal and the warmest and coolest places
- Edgartown: Massachusetts's warmest Decembernormal high 46°F