Jefferson, New Hampshire Climate
United States
Pop. 1,071 Elev. 428 m / 1,404 ft
TZ: America/New_York (UTC-4) ·
Jefferson has harsh winters with January lows averaging 5°F (-15°C), and mild summers with July highs of 77°F (25°C). Wind chill can push winter lows to -5°F (-21°C). Rain falls on about 51 days per year (29.1 in / 739 mm total), with snow on 19 days and 125 in (3168 mm) of annual accumulation. Overcast skies are common, with only 69 sunny days per year. Nearby lake water reaches 68°F (20°C) in summer.
| Temperature | 77°F (25°C) high | 5°F (-15°C) low |
| Feels like | -5°F (-20°C) low | |
| Rain | 51 days | 29.1 in (739 mm) /yr |
| Snow | 19 days | 124.7 in (3168 mm) /yr |
| Sky | 69 sunny | 16 stormy |
| Wind | 2.6 mph (1.2 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Jun, Aug, Sep
Sky & Air by Month
Cloud cover (%)
78
Jan 74
Feb 71
Mar 73
Apr 75
May 62
Jun 61
Jul 48
Aug 45
Sep 53
Oct 80
Nov 80
Dec Humidity (%)
74
Jan 70
Feb 67
Mar 60
Apr 72
May 69
Jun 74
Jul 66
Aug 70
Sep 72
Oct 80
Nov 75
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
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Nearby
Commercial airport 69 mi Lebanon Municipal Airport (LEB)
Ski resort 6 mi Mount Prospect Ski Tow
National park 30 mi Grafton Notch State Park
Mountain peak
(5,660 ft) 11 mi Mount Jefferson
Hospital 6 mi Weeks Medical Center
Hiking trail 9 mi Castle Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 21°F -6°C | 5°F -15°C | 0.1 in 2 mm | 18.7 in474 mm | 2 |
| February | 24°F -4°C | 8°F -14°C | 0.3 in 8 mm | 32.0 in814 mm | 2 |
| March | 41°F 5°C | 22°F -6°C | 2.4 in 61 mm | 20.4 in517 mm | 3 |
| April | 52°F 11°C | 33°F 1°C | 2.9 in 74 mm | 10.5 in266 mm | 3 |
| May | 61°F 16°C | 45°F 7°C | 5.7 in 145 mm | 0.1 in2 mm | 6 |
| June | 73°F 23°C | 53°F 12°C | 2.8 in 71 mm | — | 6 |
| July | 77°F 25°C | 59°F 15°C | 3.5 in 90 mm | — | 8 |
| August | 75°F 24°C | 52°F 11°C | 1.0 in 26 mm | — | 10 |
| September | 69°F 21°C | 46°F 8°C | 2.8 in 71 mm | — | 15 |
| October | 56°F 13°C | 37°F 3°C | 3.5 in 90 mm | — | 11 |
| November | 37°F 3°C | 27°F -3°C | 2.6 in 65 mm | 20.5 in520 mm | 2 |
| December | 25°F -4°C | 7°F -14°C | 1.4 in 37 mm | 22.6 in575 mm | 1 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 2 | 0 |
| February | 2 | 0 |
| March | 3 | 0 |
| April | 3 | 1 |
| May | 6 | 1 |
| June | 6 | 3 |
| July | 8 | 5 |
| August | 10 | 1 |
| September | 15 | 2 |
| October | 11 | 1 |
| November | 2 | 1 |
| December | 1 | 1 |
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 | 33°F 1°C |
| May | 45°F 7°C |
| June | 58°F 14°C |
| July | 68°F 20°C |
| August | 67°F 19°C |
| September | 60°F 15°C |
| October | 50°F 10°C |
| November | 36°F 2°C |
| December | 32°F 0°C |