Nashua, NH Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Nashua's primary NOAA station, NASHUA 2 NNW.
The climate verdict for Nashua
Water is the standout signal in Nashua, New Hampshire: 48.2 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 49°F. At 54/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 31% of scores.
- 49°F
- annual average temperature (NOAA normal)
- 54/100
- comfort score, above 31% of station-mapped location scores
- 48.2"
- annual precipitation · 53" snow
- 165 days
- frost-free days per growing season
Nashua: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00275712 · Nashua, NH 49°F mean · 48.2" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 49°F
- RANK-COOL #2,333
- PHOTO-FINISH ≈ Pocatello
- PRCP-MID 48.2"
- SWING-WIDE 49°F
- COMF-LOW 54/100
- LOAD-HEAT 6,566 HDD
- STN-1 USC00275712
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Pocatello, ID (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every NH station list.
- Nashua (this station) 49°F
- Cold Hot Springs, SD 49°F
- Hot Leroy, CO 49°F
- Near Pocatello, ID 49°F
- Near Blissfield, MI 49°F
Climate Living Index · Nashua
Nashua: 39/100 · grade F
Nashua publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Nashua, not an official NOAA rating. Rankings still use Comfort Score 54/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 48.2 in · 13.2 from 35 in | 54/100 · D |
| Normal heat + freeze calendar | 155 calendar days | 43/100 · D |
| Frost-free season | 165 days/year | 38/100 · F |
| Annual temperature balance | 48.7°F · 18.8° from 67.5°F | 35/100 · F |
| Snowfall burden | 52.9 inches/year | 19/100 · F |
Nashua · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Nashua is a continental Köppen climate: Dfa
Coldest-month mean 24.1°F and warmest-month mean 72.7°F place this station in continental, no dry season, hot summer climates (Dfa). Class Dfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, hot summer.
- Köppen code
- Dfa
- Group
- Continental
- Warmest month
- 72.7°F
- Coldest month
- 24.1°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Nashua sits across the climate record
Three NOAA fields for Nashua's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 34th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 24% wettest
- Nashua's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 76%
- Warmest-to-coldest month gap for Nashua is large versus 6,861 complete station-years.
How Nashua compares across U.S. station-mapped locations
Nashua's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
54 31st percentile score exceeds 31% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). This entry sits in this band.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Nashua's measured station temperature trend
MethodologyAcross 86 complete annual observations from 1886 to 2025, NASHUA 2 NNW warmed at a fitted rate of 0.23°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Nashua primary station fitted change +0.23 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 34°F (1°C) | 14°F (-10°C) | 24°F (-4°C) | 3.4" | 14.7" | 29.9 | 0.0 |
| February | 37°F (3°C) | 15°F (-9°C) | 26°F (-3°C) | 3.2" | 14.5" | 27.0 | 0.0 |
| March | 45°F (7°C) | 23°F (-5°C) | 34°F (1°C) | 4.3" | 10.1" | 26.2 | 0.0 |
| April | 59°F (15°C) | 34°F (1°C) | 46°F (8°C) | 4.2" | 0.7" | 13.8 | 0.1 |
| May | 70°F (21°C) | 46°F (8°C) | 58°F (14°C) | 3.9" | 0.0" | 0.9 | 0.7 |
| June | 78°F (26°C) | 56°F (13°C) | 67°F (19°C) | 4.3" | 0.0" | 0.0 | 2.7 |
| July | 84°F (29°C) | 61°F (16°C) | 73°F (23°C) | 3.6" | 0.0" | 0.0 | 6.4 |
| August | 83°F (28°C) | 59°F (15°C) | 71°F (22°C) | 3.9" | 0.0" | 0.0 | 3.8 |
| September | 75°F (24°C) | 51°F (11°C) | 63°F (17°C) | 4.0" | 0.0" | 0.2 | 1.3 |
| October | 63°F (17°C) | 39°F (4°C) | 51°F (10°C) | 4.8" | 0.0" | 8.1 | 0.0 |
| November | 51°F (11°C) | 30°F (-1°C) | 40°F (5°C) | 3.9" | 1.7" | 20.5 | 0.0 |
| December | 40°F (4°C) | 21°F (-6°C) | 30°F (-1°C) | 4.5" | 11.2" | 28.3 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 84°F around July 16, short of 90°F on every date, while 155 dates carry a normal low at or below freezing, the coldest 12°F near January 27.
The freezing stretch
The normal low stays at or below 32°F into April 9, then returns to freezing around November 7, covering 155 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is May 17, when 39% of years recorded at least a hundredth of an inch. The driest is August 31 at 28%. Summed across the calendar, that is about 120 wet dates a year.
The widest day
April 28 carries the biggest normal gap between afternoon and dawn, 25°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Nashua.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 14.7"
9.2 days with precipitation
Snow: 14.5"
8.4 days with precipitation
Snow: 10.1"
9.2 days with precipitation
Snow: 0.7"
10.8 days with precipitation
12.1 days with precipitation
10.9 days with precipitation
10.4 days with precipitation
9.3 days with precipitation
9.2 days with precipitation
10.8 days with precipitation
Snow: 1.7"
10.0 days with precipitation
Snow: 11.2"
10.1 days with precipitation
Nashua spreads its precipitation across the year
Neither half of the year dominates here: June through August take 25% of the annual total and December through February 23%, with neither reaching the 35% that would mark a distinct wet season. Nashua has no dry season to plan around, though it does carry a wide 48.6°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: October averages 4.8" and February 3.2". The three wettest months together take 28% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Nashua, it arrives in quantity
48.2" of precipitation falls across only about 120 wet days here, averaging 0.40 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 120 a year, 33% of all days
- Average depth per wet day
- 0.40 inches
- Most wet days
- May, about 12
- Fewest wet days
- February, about 8
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Winter brings real snow to Nashua
Nashua averages 52.9 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 19 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 52.9 inches of depth.
- Days recording measurable snow: about 19 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 11% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
October 12
50% probability date
Last Spring Freeze
April 30
50% probability date
Growing Season
165 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,566
Higher = more heating needed
Cooling Degree Days
661
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside NH closest to Nashua on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (49°F here).
- Clarkson, NE 49°F · 0.0°F off
- Cuba, NM 49°F · 0.0°F off
- Dove Creek, CO 49°F · 0.0°F off
- Guernsey, WY 49°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (48.2" here), excluding temperature-peer places.
- Milledgeville, GA 48.2" · 0.0" off
- Waynesboro, GA 48.2" · 0.0" off
- Charlottesville, VA 48.2" · 0.0" off
- Cheviot, OH 48.2" · 0.0" off
Snow and freeze rhythm
When cold and snow define Nashua
heating led · wet · mid swing
Nashua's energy balance leans toward cold weather: 6,566 annual heating degree days against 661 for cooling. Its 48.6°F seasonal range still makes the monthly rows more useful than the annual average alone.
Nashua's frost-free season lasts about 165 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Nashua coldest normal
January
Averaging 24°F (-4°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Nashua typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Nashua snow peak
January
Nashua averages 52.9 inches of snow a year, with January the snowiest month on the normals.
Questions about Nashua's climate
How much snow does Nashua get? ▼
How cold does Nashua get in winter? ▼
How much energy does heating and cooling require in Nashua? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Nashua's primary station: NASHUA 2 NNW (USC00275712). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 3350260). Match rule for Nashua: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Nashua comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.