Climate Comfort Score
44/100
Moderate
NOAA 1991–2020 normals 43°F annual avg Public-domain federal data
Plymouth, NH Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 43°F
- Avg annual temp
- 44/100
- Comfort score
- 44.5"
- Annual precip
- 130d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Plymouth
Plymouth, New Hampshire averages 43°F a year and scores 44/100 on the comfort index - moderate, milder than 8% of U.S. cities.
- 43°F
- annual average temperature (NOAA normal)
- 44/100
- comfort score, milder than 8% of U.S. cities
- 44.5"
- annual precipitation · 68" snow
- 130 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
43°F (6°C)
Avg High
56°F
Avg Low
31°F
Annual Precip
44.5"
Annual Snow
68.3"
Comfort Score
44/100
Moderate
Avg Annual Temperature
43°F
30-year mean (NOAA NCEI)
Annual Precipitation
44.5"
Plus 68.3" of snow
Comfort score vs national 100-point ceiling (Plymouth) 44.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Plymouth area.
How Plymouth compares to every U.S. city
Plymouth's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 Top 92% higher than 8% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Plymouth
MethodologyZooming out from Plymouth's own normal, the chart below shows how the U.S. land temperature anomaly has tracked the global mean since 1900 - the most recent decade sits warmer than the 30-year mean shown here.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 29°F (-2°C) | 7°F (-14°C) | 18°F (-8°C) | 3.2" | 18.0" | 30.7 | 0.0 |
| February | 33°F (1°C) | 8°F (-13°C) | 21°F (-6°C) | 2.6" | 15.7" | 27.9 | 0.0 |
| March | 41°F (5°C) | 18°F (-8°C) | 30°F (-1°C) | 3.1" | 13.5" | 30.2 | 0.0 |
| April | 55°F (13°C) | 29°F (-2°C) | 42°F (5°C) | 3.3" | 3.4" | 22.3 | 0.1 |
| May | 67°F (19°C) | 39°F (4°C) | 53°F (12°C) | 3.7" | 0.0" | 7.8 | 0.2 |
| June | 75°F (24°C) | 49°F (9°C) | 62°F (17°C) | 4.4" | 0.0" | 0.4 | 1.3 |
| July | 80°F (27°C) | 54°F (12°C) | 67°F (19°C) | 4.5" | 0.0" | 0.0 | 1.7 |
| August | 79°F (26°C) | 52°F (11°C) | 65°F (18°C) | 3.8" | 0.0" | 0.0 | 1.1 |
| September | 72°F (22°C) | 45°F (7°C) | 58°F (15°C) | 3.5" | 0.0" | 3.6 | 0.4 |
| October | 58°F (15°C) | 34°F (1°C) | 46°F (8°C) | 4.6" | 0.3" | 17.7 | 0.0 |
| November | 46°F (8°C) | 25°F (-4°C) | 35°F (2°C) | 3.6" | 3.2" | 24.8 | 0.0 |
| December | 34°F (1°C) | 15°F (-9°C) | 24°F (-4°C) | 4.0" | 14.2" | 30.4 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 3.2"
Snow: 18.0"
12.5 days with precipitation
February 2.6"
Snow: 15.7"
8.7 days with precipitation
March 3.1"
Snow: 13.5"
10.5 days with precipitation
April 3.3"
Snow: 3.4"
10.3 days with precipitation
May 3.7"
13.5 days with precipitation
June 4.4"
13.3 days with precipitation
July 4.5"
13.3 days with precipitation
August 3.8"
11.8 days with precipitation
September 3.5"
11.6 days with precipitation
October 4.6"
Snow: 0.3"
12.4 days with precipitation
November 3.6"
Snow: 3.2"
11.7 days with precipitation
December 4.0"
Snow: 14.2"
11.7 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
September 27
50% probability date
Last Spring Freeze
May 20
50% probability date
Growing Season
130 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,072
Higher = more heating needed
Cooling Degree Days
242
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Plymouth's climate means for you
Plymouth runs 43°F a year - peaking in July, coldest in January.
- Gardeners get about 130 frost-free days, with the last spring freeze near May 20 - plan the planting calendar around it, not the regional average.
- Energy bills track 8,072 heating and 242 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Plymouth, NH
The NOAA 1991–2020 climate normals describe Plymouth, New Hampshire as a location with an annual average temperature of 43°F, ranging from a mean daily high of 56°F to a mean daily low of 31°F. July is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USC00276945, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Beyond temperature, Plymouth averages 44.5 inches of precipitation annually, with 68.3 inches typically falling as snow - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 130 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 20 and the first fall freeze near September 27. Turning to energy use, 8,072 heating degree days and 242 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Plymouth scores 44/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows, shoulder seasons for mild highs and lows, peak summer for July-driven heat, or deep winter for January-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.
Frequently Asked Questions
What is the average temperature in Plymouth, NH? ▼
The average annual temperature in Plymouth, New Hampshire is 43°F. The warmest month averages 80°F (27°C) and the coldest averages 7°F (-14°C).
How much rain does Plymouth get? ▼
Plymouth receives 44.5 inches of precipitation annually, including 68.3 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Plymouth? ▼
Plymouth has a climate comfort score of 44/100 (Moderate), milder than 8% of U.S. cities in the PlainClimate database.
When is the growing season in Plymouth? ▼
Plymouth has approximately 130 frost-free days per year, with the last spring freeze around May 20 and the first fall freeze around September 27.
How much energy does heating and cooling require in Plymouth? ▼
Plymouth has 8,072 heating degree days and 242 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Plymouth climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00276945 near Plymouth.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00276945. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.