The best times to visit Plymouth for ideal weather are
May 21st to September 30th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Plymouth Travel Guide
Other Plymouth Travel Info
Weather in Plymouth
Average temperatures in Plymouth vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 36th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Plymouth, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 81.8°F (27.7°C) with temperatures rarely dropping below 57.9°F (14.4°C) at night.
Plymouth Temperatures (Fahrenheit)
Plymouth Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Plymouth Perceived Temperature (F)
Plymouth Perceived Temperature (C)
Average Plymouth Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Plymouth are November, February, and then March. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early November. For example, on the week of November 5th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid December with an average of 3 days of significant precipitation the week of December 17th.
When can you find snow in Plymouth? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in Plymouth.
Snow on the Ground
The graph below shows the average snow on the ground in Plymouth (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Plymouth has some very humid months, with other comfortably humid months. The least humid month is April (54% relative humidity), and the most humid month is September (73.5%).
Wind in Plymouth is usually extremely calm. The windiest month is February, followed by March and January. February’s average wind speed of around 5.2 knots (5.9 MPH or 9.6 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid February where average top sustained speeds reach 13.8 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Plymouth.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||4.7||Light breeze||12.6||Significant breeze|
|Feb||5.2||Light breeze||12.9||Significant breeze|
|Mar||4.9||Light breeze||12.5||Significant breeze|
|Apr||4.5||Light breeze||12.5||Significant breeze|
|May||3.5||Barely noticeable||11||Significant breeze|
|Jun||2.9||Barely noticeable||9.6||Gentle breeze|
|Jul||2.3||Barely noticeable||8.8||Significant breeze|
|Aug||2.1||Barely noticeable||8.3||Gentle breeze|
|Sep||2.2||Barely noticeable||8.5||Significant breeze|
|Oct||3||Barely noticeable||10.1||Gentle breeze|
|Nov||3.3||Barely noticeable||10.3||Significant breeze|
|Dec||4.2||Light breeze||11.7||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Plymouth?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 23, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Plymouth, NH, US is June, followed by August and September. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Plymouth in November. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall Plymouth Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 74.8°F (23.8°C) and 33.5°F (0.8°C) with far warmer temperatures in the later months. Rain is somewhat common with 4 to 6 days of significant precipitation per month. Spring is fairly slow for tourism, which makes it a good time for those looking for deals.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 4 to 7 days of precipitation per month. June – August is the busiest season for tourism in Plymouth, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 77.3°F (25.2°C) and 39.7°F (4.3°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 2 to 6 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is far too cold this time of year in Plymouth to be enjoyable for warm weather travelers. The average high during this season is between 37.2°F (2.9°C) and 26.7°F (-2.9°C). On average, it rains or snows a fair amount: 3 to 8 times per month. These times of year are the second busiest with tourists.