Plymouth (NH) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Plymouth.
Climate overview of Plymouth
The climate in Plymouth, New Hampshire, United States of America, is marked by large temperature swings across the seasons, ranging from 26°C (79°F) in July to -2°C (28°F) in January.
The city has a wet climate, receiving around 1255 mm (49 in) of rain/snowfall per year. October is the wettest month. July is the sunniest month, averaging 9.8 hours of sunshine per day.
Plymouth Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Plymouth — and find the best time to visit.
Monthly Temperature in Plymouth
In Plymouth, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 26°C (79°F) in July to a very cold -2°C (28°F) in January.
Nighttime temperatures range from 14°C (57°F) in July to -13°C (9°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Plymouth
Plymouth experiences significant rain/snowfall throughout the year, averaging 1255 mm (49 in) of precipitation annually. The amount of precipitation varies moderately throughout the year. The wettest month, October, sees around 141 mm (5.6 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, January, still receives a respectable 75 mm (3 in) of snowfall. For more details, please visit our Plymouth Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Plymouth
In Plymouth, summer days are longer and more sunny, with daily sunshine hours peaking at 9.8 hours in July. As the darker season arrives, the brightness of the sun becomes less. November sees a soft sun for only 4.2 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Plymouth by Month
The relative humidity is high throughout the year in Plymouth.
The city experiences its highest humidity in September, reaching 76%. In April, the humidity drops to its lowest level at 62%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Plymouth
Frequently asked questions about the climate in Plymouth
What is the best time to visit Plymouth?
September typically offers the most optimal weather in Plymouth. In contrast, January, February, March, November and December tend to have less optimal conditions.
What temperatures can I expect in Plymouth?
Daytime highs range from -2°C (28°F) in January to 26°C (79°F) in July. Nighttime lows range from -13°C (9°F) to 14°C (57°F). Temperatures vary considerably through the year.
How much rain does Plymouth get?
Annual rainfall is around 1255 mm (49 in). October is the wettest month with 141 mm (5.6 in), while January is the driest with 75 mm (3 in).
How sunny is Plymouth?
Plymouth receives around 2,512 hours of sunshine per year. July is the sunniest month with 295 hours, while November is the cloudiest with just 127 hours. Overall, Plymouth enjoys abundant sunshine.
Plymouth 3-Day Forecast
Plymouth (NH) 3-Day Forecast
Plymouth on the map
Plymouth is highlighted — select any city to see its climate.
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