Climate and monthly weather forecastPlymouth, NH
Climate and monthly weather forecast
The climate of Plymouth
Dfb, the Humid continental climate with no dry season and warm summer, is the predominant climate type in Plymouth, New Hampshire, USA as defined by the Köppen climate classification. Nestled in the northern part of the country, in the state of New Hampshire, Plymouth experiences these specific weather conditions due to its geographical position.Throughout the year, Plymouth temperatures exhibit typical continental patterns with high variability. Temperatures range from as low as 11.3°F (-11.5°C) during winter, climbing gradually to a peak of 77°F (25°C) in the warmest month of July. While high temperatures in January are recorded at an average of 23.9°F (-4.5°C), they rise to an average of 77°F (25°C) in July. Similarly, low temperatures also show a marked difference, with the lowest in January recorded at 11.3°F (-11.5°C) and the warmest lows in July at 56.5°F (13.6°C).
Plymouth sees considerable variability in other weather parameters throughout the year as well. Rainfall varies from as low as 0.79" (20mm) in January to a high of 1.5" (38mm) in October, while the number of rainfall days varies from 8.2 days in November to a high of 14.2 days in July. Snowfall in Plymouth is observed primarily in the colder months, with the highest accumulation of snow reaching 4.45" (113mm) in February and none in the summer months from May to September.
Peculiarly, Plymouth stands out for its sunlight hours and cloud coverage. Daylight hours are at a low of 9 in December and January but rise to a high of 15.4 hours in June. Sunshine hours are at a low of 3.9 hours in February and peak at 10 hours in August. Cloud coverage ranges from a low of 38% in August and September to a maximum of 59% in February.
The best time to visit Plymouth
For travelers exploring Plymouth, the summer months constitute the best time to visit, particularly from June to August. During this period, the temperature averages between 70.5°F (21.4°C) and 77°F (25°C), offering warmth and comfort. Moreover, the town sees extended daylight hours, peaking at 15.4 hours in June. Furthermore, this sun-soaked period is marked by lower humidity levels, from 76% in May to a minimum of 78% in June and July, ensuring optimal outdoor comfort.The worst time to visit Plymouth
Winter, particularly December and January, can be challenging times to visit Plymouth due to the harsh weather conditions. During these months, temperatures descend to as low as 11.3°F (-11.5°C), while snowfall averages between 2.72" (69mm) to 3.86" (98mm) in December and January respectively. Traveling during these months could potentially be met with obstacles such as road closures and other weather-related disruptions, making it less ideal for visitors.Spring weather in Plymouth
Spring in Plymouth, marking the transition from the bitter winter to the warmer months, is characterized by gradually rising temperatures from 35.2°F (1.8°C) in March to 63.3°F (17.4°C) in May. Although rainfall increases slightly with 1.42" (36mm) in April, it remains manageable. Days start to lengthen and sunshine hours elevate, pointing to the arrival of warmer days.Summer weather in Plymouth
Summer months in Plymouth, ranging from June to August, are the warmest with average high temperatures reaching 70.5°F (21.4°C) in June and peaking at 77°F (25°C) in July. Rainfall shows a slight increase, particularly in July with 1.42" (36mm), and a slight decrease to 1.1" (28mm) in August. Despite these rain numbers, the number of sunshine hours remains plentiful, making it the ideal time for outdoor activities.Autumn weather in Plymouth
Autumn in Plymouth, from September to November, brings a mild and enjoyable climate. Average high temperatures hover between 68.2°F (20.1°C) in September to 40.6°F (4.8°C) in November, offering a crisp weather perfect for fall activities. Rainfall increases slightly in October reaching 1.5" (38mm), however, the number of daylight hours remains relatively high with an abundance of sunshine hours.Winter weather in Plymouth
Plymouth sees wintery conditions from December through February with average high temperatures plummeting to 29.1°F (-1.6°C) in December and reaching the lowest at 23.9°F (-4.5°C) in January. These months come with snowfall, with February having the maximum snowfall of the year at 4.45" (113mm). Despite the snowfall, the town experiences a balanced number of sunshine hours, adding a sense of warmth to the chilly days.Weather in January
January in Plymouth, New Hampshire, bears the brunt of winter with average low temperatures dipping to 11.3°F (-11.5°C) and snowfall reaching 3.86" (98mm). This month kicks off the year with chilly winds blowing at 6.8mph (10.9km/h). Weather in January »Weather in February
February continues the winter spell in Plymouth, but the month stands out for receiving the highest snowfall of the year at 4.45" (113mm). Despite this, the average high temperature displays a slight increase from January, hovering around 27°F (-2.8°C). Weather in February »Weather in March
March carries signs of the winter-to-spring transition in Plymouth. In contrast to February, the snowfall decreases to 3.7" (94mm) and temperatures enter into a milder range. The increasing sunshine hours and daylight promise longer outdoor hours. Weather in March »Weather in April
April ushers in the true spirit of spring in Plymouth, as the pleasant season unfolds with an average increase in temperature to 49.1°F (9.5°C). This month witnesses a drop in snowfall to 3.15" (80mm), making way for increased rainfall of 1.42" (36mm). Weather in April »Weather in May
May's arrival is highlighted by vibrant spring colors in Plymouth. With an average high temperature hovering around 63.3°F (17.4°C), the season gets warmer and sunnier. Fewer snow showers result in rainfall being the predominant weather event, accounting for 1.38" (35mm). Weather in May »Weather in June
June heralds the beginning of summer in Plymouth with temperatures touching a pleasant 70.5°F (21.4°C). As the sunshine peak at 8.7 hours per day, one might notice the absence of snowfall throughout the month. Clear, sunny days coupled with lower wind speeds set the scene for a variety of outdoor pursuits. Weather in June »Weather in July
July sets a summer crescendo in Plymouth, with the highest average monthly temperature of the year, reaching a warm 77°F (25°C). Days are noticeably longer, and the sky boasts less cloud cover than other months. Lower wind speeds accompanied by high temperatures render July suitable for all types of summer activities. Weather in July »Weather in August
August, although slightly cooler than July with an average high temperature of 75°F (23.9°C), offers excellent weather in Plymouth. The absence of snowfall, fewer rainy days, and reduced wind speeds contribute to the great outdoor conditions. Weather in August »Weather in September
September ushers in autumn and quieter tourist seasons in Plymouth, with an average high temperature of 68.2°F (20.1°C). Accompanied by a slight increase in rainfall and decrease in average daylight hours, the city slowly retreats from summer's peak. Weather in September »Weather in October
October showcases the best of autumn in Plymouth with vibrant fall foliage. Though the average high temperature drops to 53.4°F (11.9°C), autumn's charm persists. The arrival of snow is minimal at 0.51" (13mm), while the rainfall reaches its highest of the year at 1.5" (38mm). Weather in October »Weather in November
November indicates the twilight of autumn in Plymouth and the approach of winter, with an average high temperature of 40.6°F (4.8°C). The notable return of snowfall, counting 3.43" (87mm), foreshadows the impending winter season. Weather in November »Weather in December
Plymouth's landscape undergoes its final transformation in December as winter takes full effect. The month is characterized by an average high temperature of 29.1°F (-1.6°C) and snowfall hitting 2.72" (69mm). The daylight shortens further, and the wind's chill intensifies as the year wraps up. Weather in December »Updated: Feb 13, 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 brings the lowest temperatures in Plymouth, New Hampshire, with an average high of 23.9°F (-4.5°C) and an average low of 11.3°F (-11.5°C).
The months with the highest humidity in Plymouth are January and February, with an average relative humidity of 87%.
The month with the least rainfall in Plymouth, New Hampshire, is January, when the rain falls for 9.5 days and typically collects 0.79" (20mm) of precipitation.
In Plymouth, New Hampshire, during the entire year, the rain falls for 136.5 days and collects up to 13.54" (344mm) of precipitation.
January through May, October through December are months with snowfall.
Throughout the year, there are 77.2 snowfall days, and 22.52" (572mm) of snow is accumulated.
The month with the most snowfall in Plymouth is February, when snow falls for 14.9 days and typically aggregates up to 4.45" (113mm) of snow.
February has the least sunshine of the year in Plymouth, with an average of 3.9h of sunshine.
With an average maximum UV index of 1, February is the month with the lowest UV index in Plymouth, New Hampshire.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Plymouth, New Hampshire, 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.
With an average relative humidity of 76%, May is the least humid month in Plymouth, New Hampshire.
May through August, with an average maximum UV index of 5, are months with the highest UV index.
June through September are months without snowfall in Plymouth.
June has the longest days of the year in Plymouth, with an average of 15h and 24min of daylight.
July proves to be the warmest month in Plymouth, New Hampshire, recording an average peak temperature of 77°F (25°C) and a minimum temperature of 56.5°F (13.6°C).
The month with the most sunshine in Plymouth, New Hampshire, is August, with an average of 10h of sunshine.
The month with the most rainfall in Plymouth is October, when the rain falls for 12.2 days and typically aggregates up to 1.5" (38mm) of precipitation.
The month with the shortest days in Plymouth, New Hampshire, is December, with an average of 9h and 0min of daylight.
Average temperature
Plymouth, NH
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (23.9°F).
The month with the highest average low temperature is July (56.5°F).
The coldest month (with the lowest average low temperature) is January (11.3°F).
Average pressure
Plymouth, NH
- Average pressure in January:
30.01"Hg - Average pressure in February:
29.99"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.04"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Plymouth, NH
- Average wind speed in January:
6.8mph - Average wind speed in February:
6.8mph - Average wind speed in March:
6.6mph - Average wind speed in April:
6.8mph - Average wind speed in May:
5.8mph - Average wind speed in June:
5.2mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.6mph - Average wind speed in September:
4.8mph - Average wind speed in October:
5.5mph - Average wind speed in November:
6mph - Average wind speed in December:
6.5mph
The windiest months (with the highest average wind speed) are January, February and April (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity
Plymouth, NH
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is May (76%).
Average rainfall
Plymouth, NH
- Average rainfall in January:
0.79" - Average rainfall in February:
0.83" - Average rainfall in March:
0.87" - Average rainfall in April:
1.42" - Average rainfall in May:
1.38" - Average rainfall in June:
1.34"
The wettest month (with the highest rainfall) is October (1.5").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days
Plymouth, NH
- Average rainfall days in January:
9.5 days - Average rainfall days in February:
9.1 days - Average rainfall days in March:
10.3 days - Average rainfall days in April:
13 days - Average rainfall days in May:
14 days - Average rainfall days in June:
13.9 days
- Average rainfall days in July:
14.2 days - Average rainfall days in August:
12.7 days - Average rainfall days in September:
9.6 days - Average rainfall days in October:
12.2 days - Average rainfall days in November:
8.2 days - Average rainfall days in December:
9.8 days
The month with the highest number of rainy days is July (14.2 days).
The month with the least rainy days is November (8.2 days).
Average snowfall
Plymouth, NH
- Average snowfall in January:
3.86" - Average snowfall in February:
4.45" - Average snowfall in March:
3.7" - Average snowfall in April:
3.15" - Average snowfall in May:
0.71" - Average snowfall in June:
0"
The month with the highest snowfall is February (4.45").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Plymouth, NH
- Average snowfall days in January:
15.4 days - Average snowfall days in February:
14.9 days - Average snowfall days in March:
15.1 days - Average snowfall days in April:
7.5 days - Average snowfall days in May:
1.5 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:
2.1 days - Average snowfall days in November:
7.3 days - Average snowfall days in December:
13.4 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Plymouth, NH
- Average daylight in January:
9h and 24min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 24min
- Average daylight in July:
15h and 6min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
4h and 12min - Average sunshine in February:
3h and 54min - Average sunshine in March:
5h and 6min - Average sunshine in April:
7h and 12min - Average sunshine in May:
8h and 12min - Average sunshine in June:
8h and 42min
- Average sunshine in July:
9h and 42min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 24min - Average sunshine in October:
5h and 24min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days
Plymouth, NH
- Average sunshine days in January:
13.1 days - Average sunshine days in February:
10.8 days - Average sunshine days in March:
11.4 days - Average sunshine days in April:
11.8 days - Average sunshine days in May:
13.2 days - Average sunshine days in June:
12.9 days
- Average sunshine days in July:
12.7 days - Average sunshine days in August:
14.1 days - Average sunshine days in September:
17 days - Average sunshine days in October:
14.7 days - Average sunshine days in November:
15.9 days - Average sunshine days in December:
14.1 days
The month with the most sunshine days is September (17 days).
The month with the least sunshine days is February (10.8 days).
Average UV index
Plymouth, NH
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover
Plymouth, NH
The month with the most cloud cover is February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility
Plymouth, NH
The months with the highest visibility are April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are January, February, March and September (4mi).
