Greenville, New Hampshire climate: Normal weather by month, frost dates and records
Greenville's normal year runs from 14°F January nights to 79°F July afternoons, with 49.5 inches of precipitation and 75 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.6°C, January lows of −10°C, July highs of 26°C, 1,258 mm of precipitation a year.
- NOAA stationGreenville (1 mi NNE)
- Station IDUSC00273658
- Location42.78°N 71.80°W
- Elevation900 ft (274 m)
- Population (town)2,005
- Census place1,102
On October 23, the normal high in Greenville is 55°F and the normal low 35°F, and the chance of measurable rain or snow is 30%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Greenville.
- Jan 30° 14°
- Feb 34° 15°
- Mar 42° 22°
- Apr 55° 33°
- May 66° 42°
- Jun 74° 52°
- Jul 79° 58°
- Aug 78° 56°
- Sep 70° 49°
- Oct 58° 38°
- Nov 46° 30°
- Dec 36° 20°
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 Greenville each month?
July is the warmest month, with normal highs of 79°F; January the coldest, with normal lows of 14°F. The most precipitation falls in October (5.42 in), the least in February (3.28 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 30°F | 14°F | 22.3°F | 3.42 | 19.2 | 9 | <1 | 30 | 9 h 20 min |
| February | 34°F | 15°F | 24.5°F | 3.28 | 19.2 | 7 | <1 | 27 | 10 h 30 min |
| March | 42°F | 22°F | 31.9°F | 4.25 | 15.7 | 9 | <1 | 26 | 11 h 50 min |
| April | 55°F | 33°F | 43.8°F | 4.35 | 2.9 | 9 | <1 | 15 | 13 h 20 min |
| May | 66°F | 42°F | 54.3°F | 3.73 | 0.0 | 11 | <1 | 2 | 14 h 40 min |
| June | 74°F | 52°F | 62.9°F | 4.26 | 0.0 | 11 | 1 | <1 | 15 h 20 min |
| July | 79°F | 58°F | 68.8°F | 3.64 | 0.0 | 9 | 2 | <1 | 15 h |
| August | 78°F | 56°F | 66.7°F | 3.84 | 0.0 | 8 | <1 | <1 | 14 h |
| September | 70°F | 49°F | 59.7°F | 4.25 | 0.0 | 8 | <1 | <1 | 12 h 30 min |
| October | 58°F | 38°F | 47.8°F | 5.42 | 0.4 | 9 | <1 | 7 | 11 h 10 min |
| November | 46°F | 30°F | 37.9°F | 4.11 | 1.9 | 9 | <1 | 22 | 9 h 50 min |
| December | 36°F | 20°F | 27.5°F | 4.96 | 16.1 | 9 | <1 | 28 | 9 h |
| Year (annual) | 56°F | 36°F | 45.7°F | 49.51 | 75.4 | 108 | 3 | 157 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −1°C | −10°C | −5.4°C | 87 mm | 49 cm |
| February | 1°C | −10°C | −4.2°C | 83 mm | 49 cm |
| March | 5°C | −5°C | −0.1°C | 108 mm | 40 cm |
| April | 13°C | 0°C | 6.6°C | 110 mm | 7 cm |
| May | 19°C | 6°C | 12.4°C | 95 mm | 0 cm |
| June | 23°C | 11°C | 17.2°C | 108 mm | 0 cm |
| July | 26°C | 15°C | 20.4°C | 92 mm | 0 cm |
| August | 25°C | 13°C | 19.3°C | 98 mm | 0 cm |
| September | 21°C | 9°C | 15.4°C | 108 mm | 0 cm |
| October | 14°C | 3°C | 8.8°C | 138 mm | 1 cm |
| November | 8°C | −1°C | 3.3°C | 104 mm | 5 cm |
| December | 2°C | −7°C | −2.5°C | 126 mm | 41 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00273658; 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 Greenville?
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 (8).
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 USC00273658.
When is the last frost in Greenville?
In Greenville, the last spring frost (32°F) comes after May 10 in half of years and after May 27 in one year in ten; the first autumn frost comes before October 6 in half of years and before September 25 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 101 year in 10 after May 27; 9 in 10 after April 26
- First autumn frost, half of years before
- October 61 year in 10 before September 25; 9 in 10 before October 21
NOAA puts the median frost-free season at 147 days, and the season without a hard freeze (28°F) at 174 days.
A hard freeze (28°F) comes after April 26 in half of springs and before October 18 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Greenville in zone 6a in ZIP code 03048.
Frost dates for every NOAA station in New Hampshire · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00273658; 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 Greenville?
In a normal year in Greenville, 3 days a year reach 90°F, 157 nights fall to 32°F or colder and 108 days bring measurable precipitation.
- Days at 90°F or more
- 3a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 157a normal year
- Days that stay below freezing
- 49high of 32°F or less
- Days with 0.01 inch of precipitation
- 108a normal year
- Days with 1 inch of snow or more
- 19a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00273658.
How sunny is Greenville?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Greenville, 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 much heating and cooling does Greenville need?
A normal year in Greenville brings 7,352 heating degree days, 37% more than the median U.S. place (5,373), and 342 cooling degree days, 62% 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 2,103 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,324 | 0 |
| February | 1,134 | 0 |
| March | 1,026 | 0 |
| April | 639 | 1 |
| May | 340 | 10 |
| June | 117 | 54 |
| July | 25 | 143 |
| August | 44 | 98 |
| September | 197 | 36 |
| October | 534 | 1 |
| November | 813 | 0 |
| December | 1,161 | 0 |
| Year (annual) | 7,352 | 342 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00273658. 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 Greenville been warmer than normal lately?
2024 averaged 47.8°F, 2.1°F above the 1991-2020 normal of 45.7°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 47.1°F | +1.4°F | 58.85 | 55.5 |
| 2022 | 46.6°F | +0.9°F | 47.29 | 56.1 |
| 2023 | 47.8°F | +2.1°F | 62.62 | 81.2 |
| 2024 | 47.8°F | +2.1°F | 46.85 | 60.3 |
Source: observed years: ACIS, station USC00273658. A year counts only with all twelve months complete.
How does Greenville's climate compare?
Greenville is warmer than 13 of the other 27 places with their own NOAA record in New Hampshire, and wetter than 25. Across the 7,247 U.S. stations with normals, its annual mean of 45.7°F is warmer than 22%.
In the Köppen classification computed from these normals, Greenville 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 Greenville share this climate record?
Townsend has no NOAA station with 1991-2020 normals of its 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.
- Townsend, MA9,220 people · 9 mi SE
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 Greenville's climate
What is the coldest month in Greenville?
January, with a normal high of 30°F and a normal low of 14°F. The warmest is July (79°F by day, 58°F at night).
Does it snow in Greenville?
Yes: 75 inches in a normal year, falling on 22 days with 0.1 inch or more, the most in January (19.2 inches).
What is the rainiest month in Greenville?
October, with 5.42 in of precipitation in a normal year; the driest is February with 3.28 in.
What plant hardiness zone is Greenville in?
The USDA's 2023 map puts Greenville in zone 6a in ZIP code 03048.
How late can frost come in Greenville?
In half of years the last 32°F night comes after May 10; in one year in ten it comes after May 27. Waiting until May 27 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
- Milford, NH9 miles from this station, 47.7°F a year
- East Milford, NH9 miles from this station, 47.8°F a year
- Jaffrey, NH11 miles from this station, 46.4°F a year
- Jaffrey Silver Ranch Airpark, NH11 miles from this station, 47.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made