Climateby Month

Nashua, NH climate by month

NOAA 1991-2020 normals · 159 ft elevation

Nashua has warm summers and cold and snowy winters. Highs peak at 83°F in July and fall to 34°F in January. Wet days are spread through the year, from about 10 to 13 a month. Normal snowfall is about 67 in a year. By our comfort score the best months are May and September.

Warmest month
83°F
July normal high
Coldest month
13°F
January normal low
Wet days a year
137
46.1 in of precipitation
Snow a year
66.8 in
normal snowfall

How warm is Nashua?

Normal highs range from 34°F in January to 83°F in July.

0°20°40°60°80°100° January: normal high 34°F (1°C), low 13°F (-11°C) 34° 13° February: normal high 37°F (3°C), low 14°F (-10°C) March: normal high 45°F (7°C), low 23°F (-5°C) April: normal high 58°F (14°C), low 34°F (1°C) May: normal high 69°F (21°C), low 46°F (8°C) June: normal high 78°F (26°C), low 56°F (13°C) July: normal high 83°F (28°C), low 61°F (16°C) 83° 61° August: normal high 82°F (28°C), low 59°F (15°C) September: normal high 74°F (23°C), low 51°F (11°C) October: normal high 61°F (16°C), low 38°F (3°C) November: normal high 49°F (9°C), low 28°F (-2°C) December: normal high 39°F (4°C), low 20°F (-7°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Nashua?

May has the most wet days (about 13); the year brings about 46 in of precipitation.

January: 12 wet days February: 11 wet days March: 12 wet days April: 12 wet days May: 13 wet days 13 June: 12 wet days July: 11 wet days August: 11 wet days September: 10 wet days 10 October: 11 wet days November: 11 wet days December: 12 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 66.8 in a year, most of it in January.

January: 17.1 in of snow 17.1 February: 16.3 in of snow March: 14.6 in of snow April: 2.8 in of snow May: 0.0 in of snow 0.0 June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.6 in of snow November: 2.0 in of snow December: 13.4 in of snow JFMAMJJASOND

How humid is Nashua?

Muggy days peak in July, at about 9 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 0 muggy days June: 3 muggy days July: 9 muggy days 9 August: 7 muggy days September: 3 muggy days October: 0 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Manchester Airport, 12 mi N of the city center.

How much daylight?

Daylight ranges from about 9.1 hours in December to 15.3 hours in June.

January: 9.4 hours of daylight February: 10.6 hours of daylight March: 11.9 hours of daylight April: 13.4 hours of daylight May: 14.6 hours of daylight June: 15.3 hours of daylight 15.3 July: 15.0 hours of daylight August: 13.9 hours of daylight September: 12.5 hours of daylight October: 11.0 hours of daylight November: 9.8 hours of daylight December: 9.1 hours of daylight 9.1 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Nashua, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 34°F13°F 3.3 in12 17.1 in 0 9.4 h
February 37°F14°F 3.2 in11 16.3 in 0 10.6 h
March 45°F23°F 4.2 in12 14.6 in 0 11.9 h
April 58°F34°F 4.1 in12 2.8 in 0 13.4 h
May 69°F46°F 3.6 in13 0.0 in 0 14.6 h
June 78°F56°F 4.2 in12 0.0 in 3 15.3 h
July 83°F61°F 3.3 in11 0.0 in 9 15.0 h
August 82°F59°F 3.8 in11 0.0 in 7 13.9 h
September 74°F51°F 3.7 in10 0.0 in 3 12.5 h
October 61°F38°F 4.7 in11 0.6 in 0 11.0 h
November 49°F28°F 3.7 in11 2.0 in 0 9.8 h
December 39°F20°F 4.3 in12 13.4 in 0 9.1 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Nashua

By our comfort score, the best months are May and September.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 250724
Feb 300619
Mar 411811
Apr 58772
May 731681
Jun 681283
Jul 58566
Aug 61864
Sep 701661
Oct 571070
Nov 41275
Dec 280818

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Nashua

The last spring frost typically comes around Apr 30, and the first fall frost around Oct 12, leaving 165 frost-free days in a typical year.

Frost and freeze dates for Nashua
Typical date1 year in 10
Last spring frost (32°F)Apr 30after May 11
First fall frost (32°F)Oct 12before Sep 30
Last hard freeze (28°F)Apr 17after Apr 29
First hard freeze (28°F)Oct 24before Oct 8
Frost-free season165 daysunder 148 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Nashua 2 Nnw (USC00275712), NOAA 1991-2020 freeze probabilities. Frost dates for every city in New Hampshire.

Hottest and coldest readings, 1991-2020

The highest reading was 102°F (July 15, 1995); the lowest was -23°F (January 27, 1994).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Nashua

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain, snowfall and snow depth: Hudson 1 Sse (USC00274234), 3.0 mi ENE of the city center, 185 ft . NOAA normals and daily records, 1991-2020.
  • Frost dates: Nashua 2 Nnw (USC00275712), 1.8 mi N of the city center, 135 ft . NOAA normals and daily records, 1991-2020.
  • Humidity and wind by hour: Manchester Airport (USW00014710), 12 mi N of the city center, 225 ft (66 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Cloud cover: Concord Muni Airport (USW00014745), 30 mi N of the city center, 346 ft (187 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Manchester Airport (743945-14710), 12 mi N of the city center, 229 ft (70 ft higher than the city). Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error