Plymouth weather in January: Plymouth, Massachusetts: normal highs, lows, rain and records for January
Plymouth in January has a normal high of 38°F and a normal low of 20°F, a daily mean of 29°F, falling from 40°F on the 1st to 37°F by the 31st. Measurable precipitation falls on 11 days in a normal January, 3.83 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 3°C and low of −6°C, 97 mm of precipitation in January.
- 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 January?
The normal high is 38°F and the normal low 20°F, for a daily mean of 29.2°F. January is 5.4°F cooler than December and 1.3°F cooler than February. January is the 12th warmest month of the year in Plymouth and the 6th wettest. Across the month the normal high falls 3°F, from 40°F on January 1 to 37°F on January 31. From one year to the next January's mean temperature typically moves about 4.2°F either way (NOAA's standard deviation), so roughly two Januarys in three average between 25°F and 33°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 40%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| January 1 | 40°F | 22°F | 40% | 24% |
| January 8 | 39°F | 21°F | 39% | 23% |
| January 15 | 38°F | 20°F | 38% | 23% |
| January 22 | 37°F | 20°F | 36% | 22% |
| January 31 | 37°F | 20°F | 35% | 21% |
Every day of January: normal high, low and chance of precipitation (warmest afternoon January 1, coldest night January 24)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| January 1 | 40°F | 22°F | 40% | 24% | 9 h 10 min |
| January 2 | 40°F | 22°F | 40% | 24% | 9 h 10 min |
| January 3 | 40°F | 22°F | 40% | 24% | 9 h 10 min |
| January 4 | 39°F | 22°F | 40% | 24% | 9 h 10 min |
| January 5 | 39°F | 22°F | 40% | 24% | 9 h 10 min |
| January 6 | 39°F | 21°F | 39% | 24% | 9 h 20 min |
| January 7 | 39°F | 21°F | 39% | 23% | 9 h 20 min |
| January 8 | 39°F | 21°F | 39% | 23% | 9 h 20 min |
| January 9 | 39°F | 21°F | 39% | 23% | 9 h 20 min |
| January 10 | 38°F | 21°F | 39% | 23% | 9 h 20 min |
| January 11 | 38°F | 21°F | 39% | 23% | 9 h 20 min |
| January 12 | 38°F | 20°F | 38% | 23% | 9 h 20 min |
| January 13 | 38°F | 20°F | 38% | 23% | 9 h 20 min |
| January 14 | 38°F | 20°F | 38% | 23% | 9 h 30 min |
| January 15 | 38°F | 20°F | 38% | 23% | 9 h 30 min |
| January 16 | 38°F | 20°F | 37% | 23% | 9 h 30 min |
| January 17 | 38°F | 20°F | 37% | 23% | 9 h 30 min |
| January 18 | 38°F | 20°F | 37% | 23% | 9 h 30 min |
| January 19 | 37°F | 20°F | 37% | 22% | 9 h 30 min |
| January 20 | 37°F | 20°F | 36% | 22% | 9 h 30 min |
| January 21 | 37°F | 20°F | 36% | 22% | 9 h 40 min |
| January 22 | 37°F | 20°F | 36% | 22% | 9 h 40 min |
| January 23 | 37°F | 20°F | 36% | 22% | 9 h 40 min |
| January 24 | 37°F | 19°F | 36% | 22% | 9 h 40 min |
| January 25 | 37°F | 19°F | 35% | 22% | 9 h 40 min |
| January 26 | 37°F | 19°F | 35% | 21% | 9 h 50 min |
| January 27 | 37°F | 19°F | 35% | 21% | 9 h 50 min |
| January 28 | 37°F | 19°F | 35% | 21% | 9 h 50 min |
| January 29 | 37°F | 20°F | 35% | 21% | 9 h 50 min |
| January 30 | 37°F | 20°F | 35% | 21% | 10 h |
| January 31 | 37°F | 20°F | 35% | 21% | 10 h |
- Normal high
- 38°FJanuary average
- Normal low
- 20°FJanuary average
- Precipitation
- 3.83 inmonth total
- Days with precipitation
- 110.01 inch or more
- Nights at 32°F or colder
- 27
- Daylight
- 9 h 10 min to 10 hJanuary 1 to January 31
- Sunshine
- 67%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 January?
On a given January day the chance of 0.01 inch or more is 37% on average, highest around January 1 (40%). In all, 3.83 in falls on 11 days of a normal January, 1 of them with an inch or more.
In a normal January in Plymouth, 27 nights fall to freezing and 9 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00054769.
How humid and windy is Plymouth in January?
At 3 p.m. the normal temperature is 35°F with 54% relative humidity and a dew point of 20°F; at 6 a.m. it is 25°F with 75% humidity. The wind averages 8.5 mph, most often from the west-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 25°F | 19°F | 75% | 7.2 mph | – |
| 9 a.m. | 29°F | 20°F | 70% | 9.4 mph | – |
| noon | 34°F | 21°F | 57% | 11.2 mph | – |
| 3 p.m. | 35°F | 20°F | 54% | 11.2 mph | – |
| 6 p.m. | 31°F | 21°F | 64% | 7.5 mph | – |
| 9 p.m. | 29°F | 20°F | 70% | 7.3 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 January in Plymouth?
The warmest January temperature on this station's record (since 1996) is 69°F, on January 12, 2020; the coldest is −11°F, on January 29, 2005. The wettest January brought 9.31 in (2023).
The January mean against the 1991-2020 normal of 29.2°F: 2021 30.9°F (+1.7), 2022 26.8°F (−2.4), 2023 38.2°F (+9.0), 2024 32.7°F (+3.5), 2025 27.7°F (−1.5), 2026 26.2°F (−3.0). 3 of 6 ran warmer than normal.
| January | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 30.9°F | +1.7°F | 2.39 in |
| 2022 | 26.8°F | −2.4°F | 3.01 in |
| 2023 | 38.2°F | +9.0°F | 9.31 in |
| 2024 | 32.7°F | +3.5°F | 6.57 in |
| 2025 | 27.7°F | −1.5°F | 2.76 in |
| 2026 | 26.2°F | −3.0°F | 1.09 in |
Source: records: ACIS, station USW00054769; recent months: ACIS, station USW00054769. Records and recent months use complete months only.
How does January in Plymouth compare across Massachusetts?
Across the 35 places PlainClimate covers in Massachusetts, January normal highs run from 30°F in Pittsfield to 40°F in Edgartown; Plymouth's is 38°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Plymouth in December43°F by day, 26°F at night
- Plymouth in February40°F by day, 21°F at night
- Plymouth through the yearEvery month, frost dates, records and recent years
- Massachusetts in JanuaryThe statewide normal and the warmest and coolest places
- Edgartown: Massachusetts's warmest Januarynormal high 40°F