Mount Washington weather in December: Mount Washington, New Hampshire: normal highs, lows, rain and records for December
Mount Washington in December has a normal high of 20°F and a normal low of 4°F, a daily mean of 12°F, falling from 24°F on the 1st to 17°F by the 31st. Measurable precipitation falls on 21 days in a normal December, 7.35 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of −7°C and low of −16°C, 187 mm of precipitation and 121 cm of snow in December.
- NOAA stationMount Washington
- Station IDUSW00014755
- Location44.27°N 71.30°W
- Elevation6,267 ft (1,910 m)
- Jan 15° -3°
- Feb 15° -3°
- Mar 21° 5°
- Apr 31° 17°
- May 43° 30°
- Jun 51° 40°
- Jul 55° 45°
- Aug 54° 43°
- Sep 49° 37°
- Oct 38° 25°
- Nov 28° 13°
- Dec 20° 4°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Mount Washington in December?
The normal high is 20°F and the normal low 4°F, for a daily mean of 11.8°F. December is 9.0°F cooler than November and 6.0°F warmer than January. December is the 10th warmest month of the year in Mount Washington and the 8th wettest, and the snowiest. Across the month the normal high falls 7°F, from 24°F on December 1 to 17°F on December 31. From one year to the next December's mean temperature typically moves about 4.3°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 8°F and 16°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 68%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 24°F | 8°F | 67% | 47% |
| December 8 | 22°F | 6°F | 68% | 47% |
| December 15 | 20°F | 4°F | 68% | 46% |
| December 22 | 19°F | 2°F | 68% | 46% |
| December 31 | 17°F | 0°F | 67% | 45% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 24°F | 8°F | 67% | 47% | 9 h 10 min |
| December 2 | 24°F | 8°F | 67% | 47% | 9 h 10 min |
| December 3 | 23°F | 7°F | 67% | 47% | 9 h 10 min |
| December 4 | 23°F | 7°F | 67% | 47% | 9 h |
| December 5 | 23°F | 7°F | 67% | 47% | 9 h |
| December 6 | 22°F | 6°F | 68% | 47% | 9 h |
| December 7 | 22°F | 6°F | 68% | 47% | 9 h |
| December 8 | 22°F | 6°F | 68% | 47% | 9 h |
| December 9 | 22°F | 5°F | 68% | 47% | 9 h |
| December 10 | 21°F | 5°F | 68% | 47% | 9 h |
| December 11 | 21°F | 5°F | 68% | 47% | 9 h |
| December 12 | 21°F | 5°F | 68% | 47% | 9 h |
| December 13 | 21°F | 4°F | 68% | 47% | 8 h 50 min |
| December 14 | 20°F | 4°F | 68% | 46% | 8 h 50 min |
| December 15 | 20°F | 4°F | 68% | 46% | 8 h 50 min |
| December 16 | 20°F | 3°F | 68% | 46% | 8 h 50 min |
| December 17 | 20°F | 3°F | 68% | 46% | 8 h 50 min |
| December 18 | 20°F | 3°F | 68% | 46% | 8 h 50 min |
| December 19 | 19°F | 3°F | 68% | 46% | 8 h 50 min |
| December 20 | 19°F | 2°F | 68% | 46% | 8 h 50 min |
| December 21 | 19°F | 2°F | 68% | 46% | 8 h 50 min |
| December 22 | 19°F | 2°F | 68% | 46% | 8 h 50 min |
| December 23 | 18°F | 2°F | 68% | 46% | 8 h 50 min |
| December 24 | 18°F | 1°F | 68% | 46% | 8 h 50 min |
| December 25 | 18°F | 1°F | 67% | 46% | 8 h 50 min |
| December 26 | 18°F | 1°F | 67% | 46% | 8 h 50 min |
| December 27 | 18°F | 1°F | 67% | 45% | 8 h 50 min |
| December 28 | 18°F | 0°F | 67% | 45% | 8 h 50 min |
| December 29 | 17°F | 0°F | 67% | 45% | 8 h 50 min |
| December 30 | 17°F | 0°F | 67% | 45% | 8 h 50 min |
| December 31 | 17°F | 0°F | 67% | 45% | 8 h 50 min |
- Normal high
- 20°FDecember average
- Normal low
- 4°FDecember average
- Precipitation
- 7.35 inmonth total
- Days with precipitation
- 210.01 inch or more
- Snowfall
- 47.7 inmonth total
- Nights at 32°F or colder
- 31
- Daylight
- 9 h 10 min to 8 h 50 minDecember 1 to December 31
- Sunshine
- 54%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014755; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Mount Washington in December?
On a given December day the chance of 0.01 inch or more is 67% on average, highest around December 8 (68%). In all, 7.35 in falls on 21 days of a normal December, 2 of them with an inch or more.
In a normal December in Mount Washington, 31 nights fall to freezing, 26 days stay below freezing all day and snowfall averages 47.7 inches.
Snow falls on 20 days in a normal December, and an inch or more covers the ground on 29 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014755.
What are the records for December in Mount Washington?
The warmest December temperature on this station's record (since 1948) is 47°F, on December 6, 2001; the coldest is −41°F, on December 30, 1962. The wettest December brought 17.95 in (1973); the snowiest, 103.7 inches (1968).
The December mean against the 1991-2020 normal of 11.8°F: 2021 14.7°F (+2.9), 2022 14.2°F (+2.4), 2023 20.7°F (+8.9), 2024 14.4°F (+2.6). 4 of 4 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 14.7°F | +2.9°F | 5.70 in |
| 2022 | 14.2°F | +2.4°F | 10.41 in |
| 2023 | 20.7°F | +8.9°F | 10.92 in |
| 2024 | 14.4°F | +2.6°F | 9.43 in |
Source: records: ACIS, station USW00014755; recent months: ACIS, station USW00014755. Records and recent months use complete months only.
How does December in Mount Washington compare across New Hampshire?
Across the 28 places PlainClimate covers in New Hampshire, December normal highs run from 30°F in Colebrook to 40°F in Nashua; Mount Washington's is 20°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Mount Washington in November28°F by day, 13°F at night
- Mount Washington in January15°F by day, −3°F at night
- Mount Washington through the yearEvery month, frost dates, records and recent years
- New Hampshire in DecemberThe statewide normal and the warmest and coolest places
- Nashua: New Hampshire's warmest Decembernormal high 40°F