New Boston, NH climate
New Boston has cold, snowy winters and pleasant summers. A typical July afternoon reaches 82°, a January night drops to 14°, and about 57 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in New Boston feels like
Winter
Spring
Summer
Fall
New Boston weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 32° | 14° | 3.3" | 15.4" | 11 | 22 | 13° – 30° |
| February | 35° | 15° | 3.2" | 11.5" | 9 | 24 | 11° – 31° |
| March | 44° | 23° | 3.9" | 14.4" | 11 | 18 | 27° – 43° |
| April | 57° | 34° | 4.0" | 2.3" | 12 | 3 | 42° – 50° |
| May | 69° | 44° | 3.6" | 0 | 14 | 0 | 51° – 62° |
| June | 77° | 54° | 4.2" | 0 | 12 | 0 | 63° – 69° |
| July | 82° | 59° | 3.9" | 0 | 11 | 0 | 66° – 74° |
| August | 80° | 57° | 3.8" | 0 | 11 | 0 | 65° – 72° |
| September | 73° | 50° | 4.1" | 0 | 11 | 0 | 57° – 66° |
| October | 60° | 39° | 4.8" | 0.1" | 10 | 0 | 45° – 57° |
| November | 48° | 29° | 3.8" | 1.1" | 11 | 3 | 34° – 44° |
| December | 37° | 20° | 4.2" | 12.6" | 11 | 17 | 23° – 38° |
| Year | 58° | 37° | 46.8" | 57.4" | 134 | 88 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in New Boston
New Boston gets 47 inches of rain and melted snow a year. October is the wettest month and February the driest. Rain or snow falls on about 134 days a year. Snow covers the ground about 88 days of the year.
About 158 frost-free days a year
In half of years the last 32° night comes by May 2 and the first one by October 8. That leaves about 158 frost-free days for gardens, shorter than 73% of U.S. towns.
Heating and cooling a home in New Boston
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In New Boston, 95% of that work is heating and 5% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
New Boston and its neighbors
New Boston borders 3 towns with climate data. January nights across them vary by 1.1°. Francestown has the coldest January nights (13°) and Bedford the hottest July afternoons (83°). New Boston’s January low is 14° and its July high 82°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How New Boston compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in New Boston averaged 1.8° warmer than the 1900s. The biggest change is in December (+3.4°). The shift is larger than in 87% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at New Boston’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 11° to 31°. June is the most reliable, staying within 6°.
Common questions about New Boston’s climate
What is the coldest month in New Boston?
January, with a typical high of 32° and a low of 14°.
What is the hottest month in New Boston?
July, with a typical high of 82° and a low of 59°. About 4 days a year reach 90°.
How much snow does New Boston get?
About 57 inches in a normal winter, most of it in January.
When is the first frost in New Boston?
In half of years the first 32° night comes by October 8, and the last spring frost by May 2.
What is the rainiest month in New Boston?
October, with 4.8 inches of rain and melted snow. The year totals 47 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for New Boston itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Milford, NH (10 mi, snow) and Weare, NH (8 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.