West Hampstead, New Hampshire climate: Climate normals at a NOAA weather station
West Hampstead's normal year runs from 15°F January nights to 82°F July afternoons, with 46.7 inches of precipitation and 76 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.8°C, January lows of −10°C, July highs of 28°C, 1,186 mm of precipitation a year.
- NOAA stationWest Hampstead
- Station IDUSC00279278
- Location42.91°N 71.20°W
- Elevation288 ft (88 m)
On October 23, the normal high in West Hampstead is 58°F and the normal low 37°F, and the chance of measurable rain or snow is 40%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for West Hampstead.
- Jan 34° 15°
- Feb 37° 16°
- Mar 45° 24°
- Apr 57° 34°
- May 68° 44°
- Jun 76° 54°
- Jul 82° 60°
- Aug 80° 58°
- Sep 73° 51°
- Oct 61° 39°
- Nov 49° 30°
- Dec 39° 21°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at West Hampstead each month?
July is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 15°F. The most precipitation falls in October (4.86 in), the least in January (3.02 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 34°F | 15°F | 24.1°F | 3.02 | 17.5 | 10 | <1 | 29 | 9 h 20 min |
| February | 37°F | 16°F | 26.5°F | 3.31 | 21.9 | 9 | <1 | 27 | 10 h 30 min |
| March | 45°F | 24°F | 34.3°F | 4.24 | 14.3 | 11 | <1 | 25 | 11 h 50 min |
| April | 57°F | 34°F | 45.7°F | 4.12 | 2.7 | 13 | <1 | 13 | 13 h 20 min |
| May | 68°F | 44°F | 56.1°F | 4.02 | 0.0 | 13 | 1 | 1 | 14 h 40 min |
| June | 76°F | 54°F | 65.3°F | 3.96 | 0.0 | 14 | 2 | <1 | 15 h 20 min |
| July | 82°F | 60°F | 71.0°F | 3.60 | 0.0 | 13 | 5 | <1 | 15 h |
| August | 80°F | 58°F | 69.1°F | 3.72 | 0.0 | 10 | 3 | <1 | 14 h |
| September | 73°F | 51°F | 61.7°F | 3.95 | 0.0 | 10 | 1 | <1 | 12 h 30 min |
| October | 61°F | 39°F | 49.9°F | 4.86 | 0.9 | 13 | <1 | 5 | 11 h 10 min |
| November | 49°F | 30°F | 39.6°F | 3.73 | 2.1 | 11 | <1 | 21 | 9 h 50 min |
| December | 39°F | 21°F | 29.8°F | 4.15 | 16.1 | 13 | <1 | 28 | 9 h |
| Year (annual) | 58°F | 37°F | 47.8°F | 46.68 | 75.5 | 140 | 11 | 150 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 1°C | −10°C | −4.4°C | 77 mm | 44 cm |
| February | 3°C | −9°C | −3.1°C | 84 mm | 56 cm |
| March | 7°C | −4°C | 1.3°C | 108 mm | 36 cm |
| April | 14°C | 1°C | 7.6°C | 105 mm | 7 cm |
| May | 20°C | 7°C | 13.4°C | 102 mm | 0 cm |
| June | 25°C | 12°C | 18.5°C | 101 mm | 0 cm |
| July | 28°C | 16°C | 21.7°C | 91 mm | 0 cm |
| August | 27°C | 14°C | 20.6°C | 94 mm | 0 cm |
| September | 23°C | 10°C | 16.5°C | 100 mm | 0 cm |
| October | 16°C | 4°C | 9.9°C | 123 mm | 2 cm |
| November | 9°C | −1°C | 4.2°C | 95 mm | 5 cm |
| December | 4°C | −6°C | −1.2°C | 105 mm | 41 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00279278; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at West Hampstead?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (10).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00279278.
When is the last frost at West Hampstead?
In West Hampstead, the last spring frost (32°F) comes after April 30 in half of years and after May 14 in one year in ten; the first autumn frost comes before October 11 in half of years and before September 29 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 301 year in 10 after May 14; 9 in 10 after April 20
- First autumn frost, half of years before
- October 111 year in 10 before September 29; 9 in 10 before October 27
NOAA puts the median frost-free season at 162 days, and the season without a hard freeze (28°F) at 187 days.
A hard freeze (28°F) comes after April 18 in half of springs and before October 24 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts West Hampstead in zone 6a in ZIP code 03873, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 6a: the coldest night of a typical year reaches −7°F (15 complete years).
Frost dates for every NOAA station in New Hampshire · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00279278; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at West Hampstead?
In a normal year in West Hampstead, 11 days a year reach 90°F, 150 nights fall to 32°F or colder and 140 days bring measurable precipitation.
- Days at 90°F or more
- 11a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 150a normal year
- Days that stay below freezing
- 35high of 32°F or less
- Days with 0.01 inch of precipitation
- 140a normal year
- Days with 1 inch of snow or more
- 18a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00279278.
How sunny is it at West Hampstead?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds at West Hampstead, 3.8 kWh per square metre a day. August is the sunniest month (78%) and December the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 1.8 |
| February | 70% | 2.7 |
| March | 69% | 3.7 |
| April | 69% | 4.7 |
| May | 68% | 5.3 |
| June | 71% | 5.7 |
| July | 78% | 6.0 |
| August | 78% | 5.3 |
| September | 77% | 4.3 |
| October | 68% | 2.8 |
| November | 70% | 2.0 |
| December | 66% | 1.5 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does West Hampstead record?
A normal year at West Hampstead brings 6,746 heating degree days, 26% more than the median U.S. place (5,373), and 497 cooling degree days, 45% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,437 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,268 | 0 |
| February | 1,078 | 0 |
| March | 952 | 0 |
| April | 580 | 2 |
| May | 292 | 14 |
| June | 76 | 86 |
| July | 10 | 196 |
| August | 20 | 147 |
| September | 149 | 50 |
| October | 472 | 2 |
| November | 762 | 0 |
| December | 1,090 | 0 |
| Year (annual) | 6,746 | 497 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00279278. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Have recent years at West Hampstead been warmer than normal?
2025 averaged 48.3°F, 0.5°F above the 1991-2020 normal of 47.8°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 49.9°F | +2.1°F | 49.87 | 40.5 |
| 2022 | 49.6°F | +1.8°F | 42.90 | 46.3 |
| 2023 | 50.4°F | +2.6°F | 58.97 | 61.6 |
| 2024 | 50.3°F | +2.5°F | 44.77 | 41.1 |
| 2025 | 48.3°F | +0.5°F | 39.90 | 55.2 |
Source: observed years: ACIS, station USC00279278. A year counts only with all twelve months complete.
How does West Hampstead's climate compare?
West Hampstead is warmer than 24 of the 28 places with their own NOAA record in New Hampshire, and wetter than 21. Across the 7,247 U.S. stations with normals, its annual mean of 47.8°F is warmer than 31%.
In the Köppen classification computed from these normals, West Hampstead is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near West Hampstead share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Methuen, MAalso near: Lawrence (3 mi, 50.1°F a year); Haverhill (6 mi, 48.4°F a year)54,272 people · 12 mi S
- Derry, NH34,062 people · 4 mi W
- Amesbury, MA17,617 people · 13 mi E
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about West Hampstead's climate
What is the coldest month at West Hampstead?
January, with a normal high of 34°F and a normal low of 15°F. The warmest is July (82°F by day, 60°F at night).
Does it snow at West Hampstead?
Yes: 76 inches in a normal year, falling on 31 days with 0.1 inch or more, the most in February (21.9 inches).
What is the rainiest month at West Hampstead?
October, with 4.86 in of precipitation in a normal year; the driest is January with 3.02 in.
What plant hardiness zone is West Hampstead in?
The USDA's 2023 map puts West Hampstead in zone 6a in ZIP code 03873, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −7°F (15 years, 1991-2020): zone 6a.
How late can frost come at West Hampstead?
In half of years the last 32°F night comes after April 30; in one year in ten it comes after May 14. Waiting until May 14 leaves about a one-in-ten chance of a later frost.
Nearby and next
- New Hampshire climateThe statewide normals and every place in the state
- Epping, NH10 miles from this station, 47.4°F a year
- Massabesic Lake, NH11 miles from this station, 47.4°F a year
- Manchester, NH12 miles from this station, 50.1°F a year
- Haverhill, MA12 miles from this station, 48.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made