Walpole, New Hampshire climate: Normal weather by month, frost dates and records
Walpole's normal year runs from 13°F January nights to 81°F July afternoons, with 47.0 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.8°C, January lows of −11°C, July highs of 27°C, 1,194 mm of precipitation a year.
- NOAA stationWalpole 2 mi S Nepp
- Station IDUSC00278856
- Location43.03°N 72.43°W
- Elevation604 ft (184 m)
- From the center3 miles
- Population (town)3,717
- Census place447
On October 14, the normal high in Walpole is 61°F and the normal low 38°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Walpole.
- Jan 31° 13°
- Feb 33° 14°
- Mar 42° 21°
- Apr 56° 33°
- May 67° 44°
- Jun 75° 53°
- Jul 81° 58°
- Aug 79° 56°
- Sep 72° 49°
- Oct 60° 38°
- Nov 47° 28°
- Dec 36° 19°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Walpole each month?
July is the warmest month, with normal highs of 81°F; January the coldest, with normal lows of 13°F. The most precipitation falls in June (5.07 in), the least in February (2.98 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 31°F | 13°F | 21.7°F | 3.17 | – | <1 | 30 | 9 h 20 min |
| February | 33°F | 14°F | 23.4°F | 2.98 | – | <1 | 27 | 10 h 30 min |
| March | 42°F | 21°F | 31.9°F | 3.59 | – | <1 | 28 | 11 h 50 min |
| April | 56°F | 33°F | 44.5°F | 3.79 | – | <1 | 15 | 13 h 20 min |
| May | 67°F | 44°F | 55.4°F | 3.44 | – | <1 | 2 | 14 h 40 min |
| June | 75°F | 53°F | 64.3°F | 5.07 | – | 1 | <1 | 15 h 20 min |
| July | 81°F | 58°F | 69.5°F | 4.83 | – | 4 | <1 | 15 h 10 min |
| August | 79°F | 56°F | 67.9°F | 4.17 | – | 1 | <1 | 14 h |
| September | 72°F | 49°F | 60.4°F | 3.96 | – | <1 | 1 | 12 h 30 min |
| October | 60°F | 38°F | 48.6°F | 4.56 | – | <1 | 6 | 11 h 10 min |
| November | 47°F | 28°F | 37.5°F | 3.63 | – | <1 | 25 | 9 h 50 min |
| December | 36°F | 19°F | 27.7°F | 3.82 | – | <1 | 29 | 9 h |
| Year (annual) | 57°F | 36°F | 46.0°F | 47.01 | – | 7 | 163 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −1°C | −11°C | −5.7°C | 81 mm |
| February | 1°C | −10°C | −4.8°C | 76 mm |
| March | 6°C | −6°C | −0.1°C | 91 mm |
| April | 13°C | 1°C | 6.9°C | 96 mm |
| May | 19°C | 7°C | 13.0°C | 87 mm |
| June | 24°C | 12°C | 17.9°C | 129 mm |
| July | 27°C | 15°C | 20.8°C | 123 mm |
| August | 26°C | 14°C | 19.9°C | 106 mm |
| September | 22°C | 9°C | 15.8°C | 101 mm |
| October | 15°C | 3°C | 9.2°C | 116 mm |
| November | 8°C | −2°C | 3.1°C | 92 mm |
| December | 2°C | −7°C | −2.4°C | 97 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Keene (9 miles away), gets 60 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00278856; 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.
When is the best weather to visit Walpole?
Normal highs sit between 65°F and 85°F in May, June, July, August and September.
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 USC00278856.
When is the last frost in Walpole?
In Walpole, the last spring frost (32°F) comes after May 8 in half of years and after May 22 in one year in ten; the first autumn frost comes before October 3 in half of years and before September 22 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
- May 81 year in 10 after May 22; 9 in 10 after April 24
- First autumn frost, half of years before
- October 31 year in 10 before September 22; 9 in 10 before October 20
NOAA puts the median frost-free season at 149 days, and the season without a hard freeze (28°F) at 175 days.
A hard freeze (28°F) comes after April 25 in half of springs and before October 16 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Walpole in zone 5b in ZIP code 03608, the nearest ZIP area.
Frost dates for every NOAA station in New Hampshire · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00278856; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 in Walpole?
In a normal year in Walpole, 7 days a year reach 90°F and 163 nights fall to 32°F or colder.
- Days at 90°F or more
- 7a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 163a normal year
- Days that stay below freezing
- 40high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00278856.
How sunny is Walpole?
Over a year 69% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Walpole, 3.7 kWh per square metre a day. August is the sunniest month (76%) and December the cloudiest (57%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 63% | 1.6 |
| February | 67% | 2.5 |
| March | 68% | 3.7 |
| April | 67% | 4.6 |
| May | 67% | 5.2 |
| June | 69% | 5.6 |
| July | 75% | 5.8 |
| August | 76% | 5.2 |
| September | 75% | 4.2 |
| October | 64% | 2.6 |
| November | 64% | 1.7 |
| December | 57% | 1.2 |
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 much heating and cooling does Walpole need?
A normal year in Walpole brings 7,259 heating degree days, 35% more than the median U.S. place (5,373), and 383 cooling degree days, 58% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,218 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,342 | 0 |
| February | 1,166 | 0 |
| March | 1,027 | 0 |
| April | 617 | 1 |
| May | 312 | 12 |
| June | 87 | 66 |
| July | 14 | 151 |
| August | 25 | 113 |
| September | 178 | 40 |
| October | 511 | 2 |
| November | 825 | 0 |
| December | 1,156 | 0 |
| Year (annual) | 7,259 | 383 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00278856. 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.
Has Walpole been warmer than normal lately?
2025 averaged 46.6°F, 0.6°F above the 1991-2020 normal of 46.0°F. 4 of the 4 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 47.5°F | +1.5°F | 39.87 |
| 2023 | 48.8°F | +2.8°F | 56.01 |
| 2024 | 49.0°F | +3.0°F | 43.75 |
| 2025 | 46.6°F | +0.6°F | – |
Source: observed years: ACIS, station USC00278856. A year counts only with all twelve months complete.
How does Walpole's climate compare?
Walpole is warmer than 14 of the other 27 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 46.0°F is warmer than 23%.
In the Köppen classification computed from these normals, Walpole 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 Walpole share this climate record?
13 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.
- Bellows Falls, VT2,740 people · 7 mi N
- West Brattleboro, VT2,614 people · 15 mi SW
- Saxtons River, VT467 people · 8 mi NW
- Putney, VT2,597 people · 6 mi SW
- Westminster, VT285 people · 3 mi N
- Harmonyville, VT159 people · 12 mi W
- Townshend, VT1,282 people · 12 mi W
- North Westminster, VT152 people · 6 mi N
- Newfane, VT94 people · 12 mi W
- Grafton, VT638 people · 13 mi NW
- Wardsboro, VT861 people · 18 mi W
- West Dummerston, VT59 people · 12 mi SW
- Jamaica, VT989 people · 18 mi W
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 Walpole's climate
What is the coldest month in Walpole?
January, with a normal high of 31°F and a normal low of 13°F. The warmest is July (81°F by day, 58°F at night).
Does it snow in Walpole?
Yes. NOAA publishes no 1991-2020 snowfall normal for Walpole's NOAA station; the nearest record that keeps one, Keene (9 miles away), records 60 inches of snow in a normal year.
What is the rainiest month in Walpole?
June, with 5.07 in of precipitation in a normal year; the driest is February with 2.98 in.
What plant hardiness zone is Walpole in?
The USDA's 2023 map puts Walpole in zone 5b in ZIP code 03608, the nearest ZIP area.
How late can frost come in Walpole?
In half of years the last 32°F night comes after May 8; in one year in ten it comes after May 22. Waiting until May 22 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
- Keene, NH9 miles from this station, 45.4°F a year
- North Springfield, VT21 miles from this station, 45.4°F a year
- Springfield, VT22 miles from this station, 45.5°F a year
- Cavendish, VT25 miles from this station, 44.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made