Climate and monthly weather forecastPlymouth, MA
Climate and monthly weather forecast
The climate of Plymouth
Located within a predominant Köppen climate classification of Cfa, Plymouth, Massachusetts demonstrates a climate best described as humid subtropical, with no dry season. Geographically positioned in the eastern section of the United States, Plymouth displays a diverse range of weather conditions throughout the year due to its coastal placement.Analyzing the data unveiled some interesting patterns. From the chilly temperatures of 35.8°F (2.1°C) in January to the peak warmth of 77.5°F (25.3°C) in July, Plymouth witnesses a considerable temperature swing annually. Correspondingly, the nighttime lows range from a brisk 26.1°F (-3.3°C) in January to a relatively warm 65.8°F (18.8°C) in July. This substantiates Plymouth's representation as a humid subtropical climate.
Humidity levels retain a relative stability, fluctuating modestly from 74% in April up to 80% in July. Remarkably, the town experiences rainfall throughout the year, with January expecting 1.26" (32mm) and the wettest month, July, witnessing about 1.65" (42mm). Snowfall, though not a regular occurrence, can be seen from January to March, and then briefly in November with January presenting a notable 1.18" (30mm).
The best time to visit Plymouth
Upon evaluating the climatologic parameters, the ideal time to visit Plymouth seems to be from June to September. During these months, the temperatures are conducive for outdoor activities varying on average from 69.6°F (20.9°C) in June to a maximum of 77.5°F (25.3°C) in July. Furthermore, sea temperatures during this time range from a pleasant 58.6°F (14.8°C) in June to a warm 68.4°F (20.2°C) in August. Consequently, this period becomes highly inviting for watersports and beach activities.The worst time to visit Plymouth
Contrarily, the least appealing period to plan visiting Plymouth fall between the months of December to February. Due to the frosty weather and temperatures oscillating from 35.8°F (2.1°C) to 42.4°F (5.8°C), these months are likely to dampen the ability to indulge in outdoor exploration. Concurrently, the highest snowfalls are prevalent during these months, reaching towards a maximum of 1.3" (33mm) in February. Travelers are advised to be prepared for colder conditions and potential snow-related complications.Spring weather in Plymouth
Spring weather in Plymouth witnesses a steady transition from the winter cold into the vibrant warmth. During this period, from March to May, temperatures rise gradually from 42.4°F (5.8°C) to 61.5°F (16.4°C). Rainfall marking spring months registers a relatively high quantity with a peak measurement of 1.46" (37mm) in April and May.Summer weather in Plymouth
Summer in Plymouth, from June through August, presents the town at its warmest. Average highs reach from 69.6°F (20.9°C) in June to 77.5°F (25.3°C) in July and slightly decrease to 76.6°F (24.8°C) in August. Humidity peaks during this period but is offset by the peaceful sea breeze since sea temperatures rise to 68.4°F (20.2°C) in August.Autumn weather in Plymouth
Autumn months, from September to November, in Plymouth, see a receding warmth with the arrival of a cool, yet delightful climate. Temperature highs fall from 70.2°F (21.2°C) in September to 50.7°F (10.4°C) in November. Although rainfall increases, reaching its peak for the year at 1.65" (42mm) in October, it adds to the charm of the season.Winter weather in Plymouth
Winter in Plymouth, starting in December till February, exhibits a chilly climate. Temperatures fluctuate from an average high of 41.9°F (5.5°C) in December to a low of 35.8°F (2.1°C) in January, with the nighttime lows dropping consistently below freezing. Snowfall makes its highest appearance in this season, particularly in January, which raises the necessity for adequate cold-weather preparations.Weather in January
The biting winter has comfortably settled in Plymouth, Massachusetts, initiating the year with persistent clouds and typical wintry conditions. Characteristics of January weather include icy temperatures, restricted daylight hours, and frequent snowfalls, a common occurrence in the long New England winters. Weather in January »Weather in February
As winter inches towards its end, February brings a slight rise in temperatures but continues the winter's chill. The city's weather remains consistent with a few variations like decreased snowfall days and a minor rise in sea temperature. Weather in February »Weather in March
Come March, Plymouth, Massachusetts, leaves behind the harsh winter, gearing towards the warmer breeze of spring. March's weather has its unique signatures, distinguished by melting snow and the rise in temperature, rendering the winter a beautiful farewell. Weather in March »Weather in April
April announces the onset of spring in Plymouth, Massachusetts, with weather characterized by blooming flowers and intermittent rainfalls. This month is a period of awakening when the chill is replaced by a mild warmth and lengthier daylight hours. Weather in April »Weather in May
May in Plymouth, Massachusetts, brings extensive warmth and abundant daylight, setting the stage for summer to unfold. The city, now blooming in the spring brilliance, witnesses longer days and considerably warmer temperatures. This month is marked by no snowfall, heralding the official closure of the winter season. Weather in May »Weather in June
June asserts the arrival of summer in Plymouth, Massachusetts, with consistent warmth, rare rainfall, and spirited outdoor activities. As temperature levels rise, the city enters summer, inviting tourists to exploit its historic charm and coastal allure. Weather in June »Weather in July
Joining the summer bandwagon, July in Plymouth, Massachusetts, boasts the highest temperatures, fewer clouds, and bustling beaches. With its characteristic summer hotness, July's weather stands synonymous with beach vacations, sea-surfing, and uninterrupted outdoor leisure. Weather in July »Weather in August
August marks the zenith of summer in Plymouth, Massachusetts, featuring steady high temperatures, ample sunshine, and relatively low rainfall. Weather in August matures into a seamless continuation of July's warmth, with an added touch of shrinking daylight hours. Weather in August »Weather in September
As summer dwindles down, September in Plymouth, Massachusetts, signals the onset of the fall season with cooling temperatures and a change in foliage. The September climate brings comfortable temperatures, sporadic rain, and the always inviting sea. Weather in September »Weather in October
October in Plymouth, Massachusetts, showcases the splendid fall weather with crisp air, vibrant foliage, and shorter days. Being in the throes of the fall season, the city appeals with its pumpkin-spiced weather and brown-colored vistas. Weather in October »Weather in November
November brings with it the first taste of winter to Plymouth, Massachusetts, while the city is still recollecting memories of the colorful fall. The transition from fall to winter is marked by a significant drop in temperatures, surface pressure fluctuations, and fewer daylight hours. Weather in November »Weather in December
December in Plymouth, Massachusetts, immerses the city in the throes of a classic New England winter. As the city wraps up the year, it welcomes back the cold weather, snowy landscapes, and holiday festivities. A steep increase in snowfall from 0.24" (6mm) in November to 1.02" (26mm) in December reignites the city’s winter charm. Weather in December »Updated: Jul 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January tends to be the coldest month, with temperatures averaging a daily high of 35.8°F (2.1°C) and a low of 26.1°F (-3.3°C).
Throughout the year, in Plymouth, there are 132.2 rainfall days, and 16.3" (414mm) of precipitation is accumulated.
Months with snowfall are January through April, November and December.
Throughout the year, there are 23.3 snowfall days, and 5.87" (149mm) of snow is accumulated.
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
The month with the least rainfall is February, when the rain falls for 7.5 days and typically collects 1.02" (26mm) of precipitation.
With an average ocean temperature of 38.1°F (3.4°C), February is the month with the coldest seawater.
The months with the least sunshine are February and December, with an average of 4.7h of sunshine.
The months with the lowest humidity are March, April and November, with an average relative humidity of 74%.
March is the month with the most snowfall. Snow falls for 4.9 days and accumulates 1.77" (45mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
May through October are months without snowfall.
The month with the longest days is June, with an average of 15h and 12min of daylight.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
July is the month that records the highest temperatures, with averages ranging from a high of 77.5°F (25.3°C) to a low of 65.8°F (18.8°C).
The most humid month is July, with an average relative humidity of 80%.
The wettest months are July and October, with an average 1.65" (42mm) of rainfall.
August is the month with the warmest seawater, with an average ocean temperature of 68.5°F (20.3°C).
August has the most sunshine of the year, with an average of 10.6h of sunshine.
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Plymouth, MA
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (35.8°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure
Plymouth, MA
- Average pressure in January:
30"Hg - Average pressure in February:
29.99"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.03"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Plymouth, MA
- Average wind speed in January:
12.3mph - Average wind speed in February:
12.1mph - Average wind speed in March:
12.1mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8.6mph
- Average wind speed in July:
8mph - Average wind speed in August:
7.8mph - Average wind speed in September:
9.1mph - Average wind speed in October:
10.5mph - Average wind speed in November:
11.2mph - Average wind speed in December:
11.6mph
The windiest month (with the highest average wind speed) is January (12.3mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).
Average humidity
Plymouth, MA
The month with the highest relative humidity is July (80%).
The months with the lowest relative humidity are March, April and November (74%).
Average rainfall
Plymouth, MA
- Average rainfall in January:
1.26" - Average rainfall in February:
1.02" - Average rainfall in March:
1.34" - Average rainfall in April:
1.46" - Average rainfall in May:
1.34" - Average rainfall in June:
1.46"
- Average rainfall in July:
1.65" - Average rainfall in August:
1.34" - Average rainfall in September:
1.1" - Average rainfall in October:
1.65" - Average rainfall in November:
1.14" - Average rainfall in December:
1.54"
The wettest months (with the highest rainfall) are July and October (1.65").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days
Plymouth, MA
- Average rainfall days in January:
7.4 days - Average rainfall days in February:
7.5 days - Average rainfall days in March:
10.2 days - Average rainfall days in April:
13 days - Average rainfall days in May:
13.2 days - Average rainfall days in June:
13.3 days
- Average rainfall days in July:
14 days - Average rainfall days in August:
11.8 days - Average rainfall days in September:
11 days - Average rainfall days in October:
11.8 days - Average rainfall days in November:
9.2 days - Average rainfall days in December:
9.8 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is January (7.4 days).
Average snowfall
Plymouth, MA
The month with the highest snowfall is March (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Plymouth, MA
- Average snowfall days in January:
7.1 days - Average snowfall days in February:
5.6 days - Average snowfall days in March:
4.9 days - Average snowfall days in April:
0.8 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.9 days - Average snowfall days in December:
4 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature
Plymouth, MA
The best month for swimming (with the highest average sea temperature) is August (68.4°F).
The coldest month (with the lowest average sea temperature) is February (38.2°F).
Average daylight / Average sunshine
Plymouth, MA
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
5h and 0min - Average sunshine in February:
4h and 42min - Average sunshine in March:
5h and 54min - Average sunshine in April:
8h and 18min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 18min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
10h and 36min - Average sunshine in September:
8h and 36min - Average sunshine in October:
6h and 18min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 42min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 42min).
Average sunshine days
Plymouth, MA
- Average sunshine days in January:
17.5 days - Average sunshine days in February:
15.2 days - Average sunshine days in March:
15.7 days - Average sunshine days in April:
14.9 days - Average sunshine days in May:
15.3 days - Average sunshine days in June:
14.9 days
- Average sunshine days in July:
14.8 days - Average sunshine days in August:
16.3 days - Average sunshine days in September:
17 days - Average sunshine days in October:
17.3 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
18.5 days
The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is July (14.8 days).
Average UV index
Plymouth, MA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover
Plymouth, MA
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility
Plymouth, MA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
