Grantham, New Hampshire Climate
United States
Pop. 2,308 Elev. 294 m / 965 ft
TZ: America/New_York (UTC-4) ·
Grantham sees mild summers peaking at 83°F (28°C) in July, and frigid winters that bottom out around 13°F (-11°C) in December. Humidity pushes the summer feels-like temperature to 88°F (31°C), while wind chill can drive winter lows to 3°F (-16°C). Precipitation occurs on roughly 52 days per year (32.5 in / 826 mm total), with snow on 13 days and 82 in (2094 mm) of annual accumulation. The city averages 91 sunny days per year and around 20 thunderstorm days. Nearby lake water reaches 72°F (22°C) in summer.
| Temperature | 83°F (29°C) high | 13°F (-11°C) low |
| Feels like | 88°F (31°C) high | 3°F (-16°C) low |
| Rain | 52 days | 32.5 in (826 mm) /yr |
| Snow | 13 days | 82.4 in (2094 mm) /yr |
| Sky | 91 sunny | 20 stormy |
| Wind | 3.1 mph (1.4 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Jun, Jul, Aug, Sep
Sky & Air by Month
Cloud cover (%)
59
Jan 63
Feb 66
Mar 69
Apr 80
May 61
Jun 58
Jul 45
Aug 46
Sep 46
Oct 68
Nov 68
Dec Humidity (%)
62
Jan 67
Feb 60
Mar 57
Apr 74
May 69
Jun 66
Jul 64
Aug 67
Sep 71
Oct 71
Nov 69
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 13 mi Lebanon Municipal Airport (LEB)
Ski resort 2 mi Eastman Cross Country
National park 79 mi Connecticut River Greenway State Park
Mountain peak
(5,089 ft) 52 mi Mount Lincoln
Hospital 8 mi New London Hospital
Hiking trail 13 mi Goshen Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 27°F -3°C | 13°F -10°C | 0.2 in 5 mm | 11.6 in295 mm | 7 |
| February | 29°F -2°C | 13°F -10°C | 0.7 in 18 mm | 32.0 in814 mm | 4 |
| March | 47°F 8°C | 27°F -3°C | 2.7 in 68 mm | 9.5 in241 mm | 7 |
| April | 57°F 14°C | 37°F 3°C | 2.7 in 69 mm | 7.9 in201 mm | 5 |
| May | 63°F 17°C | 47°F 8°C | 8.2 in 209 mm | — | 4 |
| June | 76°F 25°C | 57°F 14°C | 2.3 in 59 mm | — | 7 |
| July | 83°F 29°C | 62°F 17°C | 3.3 in 84 mm | — | 9 |
| August | 79°F 26°C | 54°F 12°C | 1.1 in 29 mm | — | 15 |
| September | 73°F 23°C | 50°F 10°C | 3.0 in 75 mm | — | 13 |
| October | 59°F 15°C | 40°F 4°C | 4.7 in 120 mm | — | 14 |
| November | 42°F 6°C | 31°F -1°C | 2.4 in 61 mm | 3.8 in97 mm | 3 |
| December | 30°F -1°C | 13°F -11°C | 1.2 in 31 mm | 17.6 in446 mm | 3 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 7 | 0 |
| February | 4 | 0 |
| March | 7 | 0 |
| April | 5 | 1 |
| May | 4 | 4 |
| June | 7 | 2 |
| July | 9 | 6 |
| August | 15 | 1 |
| September | 13 | 2 |
| October | 14 | 3 |
| November | 3 | 1 |
| December | 3 | 0 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 32°F 0°C |
| February | 32°F 0°C |
| March | 32°F 0°C |
| April | 37°F 3°C |
| May | 48°F 9°C |
| June | 59°F 15°C |
| July | 72°F 22°C |
| August | 69°F 21°C |
| September | 63°F 17°C |
| October | 53°F 12°C |
| November | 41°F 5°C |
| December | 32°F 0°C |