Pullman weather in December: Pullman, Washington: normal highs, lows, rain and records for December
Pullman in December has a normal high of 37°F and a normal low of 27°F, a daily mean of 32°F, falling from 39°F on the 1st to 36°F by the 31st. Measurable precipitation falls on 14 days in a normal December, 2.21 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 3°C and low of −3°C, 56 mm of precipitation in December.
- NOAA stationPullman Moscow Regional Airport
- Station IDUSW00094129
- Location46.74°N 117.11°W
- Elevation2,551 ft (778 m)
- Population33,543
- Jan 38° 28°
- Feb 42° 29°
- Mar 49° 33°
- Apr 56° 37°
- May 65° 44°
- Jun 72° 48°
- Jul 83° 51°
- Aug 83° 50°
- Sep 74° 45°
- Oct 59° 38°
- Nov 45° 33°
- Dec 37° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Pullman in December?
The normal high is 37°F and the normal low 27°F, for a daily mean of 31.7°F. December is 6.9°F cooler than November and 1.0°F cooler than January. December is the 12th warmest month of the year in Pullman and the wettest. Across the month the normal high falls 3°F, from 39°F on December 1 to 36°F on December 31. From one year to the next December's mean temperature typically moves about 2.9°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 29°F and 35°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 46%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 39°F | 29°F | 46% | 23% |
| December 8 | 37°F | 28°F | 46% | 22% |
| December 15 | 36°F | 27°F | 46% | 22% |
| December 22 | 36°F | 26°F | 45% | 21% |
| December 31 | 36°F | 26°F | 44% | 21% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 22)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 39°F | 29°F | 46% | 23% | 8 h 50 min |
| December 2 | 39°F | 29°F | 46% | 23% | 8 h 50 min |
| December 3 | 38°F | 29°F | 46% | 23% | 8 h 50 min |
| December 4 | 38°F | 29°F | 46% | 23% | 8 h 50 min |
| December 5 | 38°F | 28°F | 46% | 23% | 8 h 50 min |
| December 6 | 38°F | 28°F | 46% | 23% | 8 h 40 min |
| December 7 | 37°F | 28°F | 46% | 22% | 8 h 40 min |
| December 8 | 37°F | 28°F | 46% | 22% | 8 h 40 min |
| December 9 | 37°F | 28°F | 46% | 22% | 8 h 40 min |
| December 10 | 37°F | 27°F | 46% | 22% | 8 h 40 min |
| December 11 | 37°F | 27°F | 46% | 22% | 8 h 40 min |
| December 12 | 37°F | 27°F | 46% | 22% | 8 h 40 min |
| December 13 | 36°F | 27°F | 46% | 22% | 8 h 40 min |
| December 14 | 36°F | 27°F | 46% | 22% | 8 h 40 min |
| December 15 | 36°F | 27°F | 46% | 22% | 8 h 30 min |
| December 16 | 36°F | 26°F | 46% | 22% | 8 h 30 min |
| December 17 | 36°F | 26°F | 45% | 22% | 8 h 30 min |
| December 18 | 36°F | 26°F | 45% | 22% | 8 h 30 min |
| December 19 | 36°F | 26°F | 45% | 22% | 8 h 30 min |
| December 20 | 36°F | 26°F | 45% | 22% | 8 h 30 min |
| December 21 | 36°F | 26°F | 45% | 21% | 8 h 30 min |
| December 22 | 36°F | 26°F | 45% | 21% | 8 h 30 min |
| December 23 | 36°F | 26°F | 45% | 21% | 8 h 30 min |
| December 24 | 36°F | 26°F | 45% | 21% | 8 h 30 min |
| December 25 | 36°F | 26°F | 45% | 21% | 8 h 30 min |
| December 26 | 36°F | 26°F | 44% | 21% | 8 h 30 min |
| December 27 | 36°F | 26°F | 44% | 21% | 8 h 30 min |
| December 28 | 36°F | 26°F | 44% | 21% | 8 h 30 min |
| December 29 | 36°F | 26°F | 44% | 21% | 8 h 30 min |
| December 30 | 36°F | 26°F | 44% | 21% | 8 h 40 min |
| December 31 | 36°F | 26°F | 44% | 21% | 8 h 40 min |
- Normal high
- 37°FDecember average
- Normal low
- 27°FDecember average
- Precipitation
- 2.21 inmonth total
- Days with precipitation
- 140.01 inch or more
- Nights at 32°F or colder
- 25
- Daylight
- 8 h 50 min to 8 h 40 minDecember 1 to December 31
- Sunshine
- 55%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094129; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Pullman in December?
On a given December day the chance of 0.01 inch or more is 45% on average, highest around December 2 (46%). In all, 2.21 in falls on 14 days of a normal December.
In a normal December in Pullman, 25 nights fall to freezing and 9 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094129.
What are the records for December in Pullman?
The warmest December temperature on Pullman's official record (since 1893) is 64°F, on December 12, 1921; the coldest is −32°F, on December 30, 1968. The wettest December brought 7.12 in (1933); the snowiest, 44.6 inches (1971).
The December mean against the 1991-2020 normal of 31.7°F: 2021 30.0°F (−1.7), 2022 27.9°F (−3.8), 2023 36.7°F (+5.0), 2024 35.6°F (+3.9), 2025 39.7°F (+8.0). 3 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 30.0°F | −1.7°F | 3.30 in |
| 2022 | 27.9°F | −3.8°F | 3.02 in |
| 2023 | 36.7°F | +5.0°F | 2.48 in |
| 2024 | 35.6°F | +3.9°F | 2.97 in |
| 2025 | 39.7°F | +8.0°F | 5.74 in |
Source: records: ACIS, NWS threaded record PUWthr; recent months: ACIS, station USW00094129. Records and recent months use complete months only.
How does December in Pullman compare across Washington?
Across the 96 places PlainClimate covers in Washington, December normal highs run from 29°F in Winthrop to 48°F in Grayland; Pullman's is 37°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.