Climate Comfort Score
44/100
Moderate
NOAA 1991–2020 normals 43°F annual avg Public-domain federal data
Jefferson, 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
- 41.0"
- Annual precip
- 146d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Jefferson
Jefferson, 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
- 41.0"
- annual precipitation · 95" snow
- 146 days
- frost-free days per 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
52°F
Avg Low
33°F
Annual Precip
41.0"
Annual Snow
94.8"
Comfort Score
44/100
Moderate
Avg Annual Temperature
43°F
30-year mean (NOAA NCEI)
Annual Precipitation
41.0"
Plus 94.8" of snow
Comfort score vs national 100-point ceiling (Jefferson) 44.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Jefferson area.
How Jefferson compares to every U.S. city
Jefferson'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 Jefferson
MethodologyJefferson's NOAA 1991-2020 normal sits inside a longer story: U.S. land temperatures have been tracking (and drifting from) the global mean since 1900, and the chart below shows that spread, with the most recent decade running warmer than the 30-year mean.
- 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 | 26°F (-3°C) | 7°F (-14°C) | 17°F (-8°C) | 2.5" | 20.1" | 30.5 | 0.0 |
| February | 29°F (-2°C) | 9°F (-13°C) | 19°F (-7°C) | 2.3" | 19.8" | 27.5 | 0.0 |
| March | 38°F (3°C) | 18°F (-8°C) | 28°F (-2°C) | 2.6" | 16.7" | 28.5 | 0.0 |
| April | 51°F (11°C) | 30°F (-1°C) | 41°F (5°C) | 3.4" | 6.5" | 19.4 | 0.0 |
| May | 64°F (18°C) | 42°F (5°C) | 53°F (12°C) | 3.8" | 0.5" | 2.6 | 0.1 |
| June | 73°F (23°C) | 51°F (10°C) | 62°F (16°C) | 4.4" | 0.0" | 0.1 | 0.6 |
| July | 78°F (25°C) | 56°F (13°C) | 67°F (19°C) | 4.3" | 0.0" | 0.0 | 0.8 |
| August | 76°F (24°C) | 54°F (12°C) | 65°F (18°C) | 4.0" | 0.0" | 0.0 | 0.1 |
| September | 67°F (20°C) | 45°F (7°C) | 56°F (14°C) | 3.3" | 0.0" | 2.0 | 0.0 |
| October | 55°F (13°C) | 37°F (3°C) | 46°F (8°C) | 4.3" | 1.8" | 8.8 | 0.0 |
| November | 42°F (5°C) | 27°F (-3°C) | 34°F (1°C) | 3.0" | 7.7" | 24.4 | 0.0 |
| December | 31°F (-1°C) | 16°F (-9°C) | 23°F (-5°C) | 3.3" | 21.7" | 28.7 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 2.5"
Snow: 20.1"
16.3 days with precipitation
February 2.3"
Snow: 19.8"
13.5 days with precipitation
March 2.6"
Snow: 16.7"
14.1 days with precipitation
April 3.4"
Snow: 6.5"
13.6 days with precipitation
May 3.8"
Snow: 0.5"
14.5 days with precipitation
June 4.4"
14.5 days with precipitation
July 4.3"
12.9 days with precipitation
August 4.0"
12.2 days with precipitation
September 3.3"
10.6 days with precipitation
October 4.3"
Snow: 1.8"
14.4 days with precipitation
November 3.0"
Snow: 7.7"
14.5 days with precipitation
December 3.3"
Snow: 21.7"
16.9 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 1
50% probability date
Last Spring Freeze
May 8
50% probability date
Growing Season
146 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,391
Higher = more heating needed
Cooling Degree Days
219
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Jefferson's climate means for you
Jefferson runs 43°F a year - peaking in July, coldest in January.
- Gardeners get about 146 frost-free days, with the last spring freeze near May 8 - plan the planting calendar around it, not the regional average.
- Energy bills track 8,391 heating and 219 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: Jefferson, NH
An annual average temperature of 43°F, ranging from a mean daily high of 52°F to a mean daily low of 33°F is what the NOAA 1991–2020 climate normals report for Jefferson, New Hampshire. July is typically the warmest month of the year, while January is the coldest. That baseline comes from station USC00274329 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.
Beyond temperature, Jefferson averages 41.0 inches of precipitation annually, with 94.8 inches typically falling as snow - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 146 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 8 and the first fall freeze near October 1. Turning to energy use, 8,391 heating degree days and 219 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Jefferson 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 Jefferson, NH? ▼
The average annual temperature in Jefferson, New Hampshire is 43°F. The warmest month averages 78°F (25°C) and the coldest averages 7°F (-14°C).
How much rain does Jefferson get? ▼
Jefferson receives 41.0 inches of precipitation annually, including 94.8 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Jefferson? ▼
Jefferson 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 Jefferson? ▼
Jefferson has approximately 146 frost-free days per year, with the last spring freeze around May 8 and the first fall freeze around October 1.
How much energy does heating and cooling require in Jefferson? ▼
Jefferson has 8,391 heating degree days and 219 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 Jefferson climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00274329 near Jefferson.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00274329. 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.