Walla Walla weather in December: Walla Walla, Washington: normal highs, lows, rain and records for December
Walla Walla in December has a normal high of 41°F and a normal low of 30°F, a daily mean of 36°F, falling from 43°F on the 1st to 41°F by the 31st. Measurable precipitation falls on 14 days in a normal December, 2.23 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 5°C and low of −1°C, 57 mm of precipitation and 7 cm of snow in December.
- NOAA stationWalla Walla Regional Airport
- Station IDUSW00024160
- Location46.09°N 118.29°W
- Elevation1,166 ft (355 m)
- Population33,901
- Jan 42° 31°
- Feb 47° 33°
- Mar 56° 38°
- Apr 63° 43°
- May 71° 49°
- Jun 79° 55°
- Jul 90° 62°
- Aug 89° 62°
- Sep 79° 54°
- Oct 63° 44°
- Nov 49° 36°
- Dec 41° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Walla Walla in December?
The normal high is 41°F and the normal low 30°F, for a daily mean of 35.6°F. December is 6.8°F cooler than November and 0.7°F cooler than January. December is the 12th warmest month of the year in Walla Walla and the 2nd wettest, and the snowiest. Across the month the normal high falls 2°F, from 43°F on December 1 to 41°F on December 31. From one year to the next December's mean temperature typically moves about 3.3°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 32°F and 39°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 45%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 43°F | 32°F | 45% | 22% |
| December 8 | 42°F | 31°F | 45% | 22% |
| December 15 | 41°F | 30°F | 44% | 22% |
| December 22 | 40°F | 29°F | 44% | 22% |
| December 31 | 41°F | 29°F | 44% | 22% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 23)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 43°F | 32°F | 45% | 22% | 9 h |
| December 2 | 43°F | 32°F | 45% | 22% | 8 h 50 min |
| December 3 | 43°F | 32°F | 45% | 22% | 8 h 50 min |
| December 4 | 43°F | 32°F | 45% | 22% | 8 h 50 min |
| December 5 | 42°F | 32°F | 45% | 22% | 8 h 50 min |
| December 6 | 42°F | 31°F | 45% | 22% | 8 h 50 min |
| December 7 | 42°F | 31°F | 45% | 22% | 8 h 50 min |
| December 8 | 42°F | 31°F | 45% | 22% | 8 h 50 min |
| December 9 | 41°F | 31°F | 45% | 22% | 8 h 40 min |
| December 10 | 41°F | 31°F | 45% | 22% | 8 h 40 min |
| December 11 | 41°F | 31°F | 45% | 22% | 8 h 40 min |
| December 12 | 41°F | 30°F | 45% | 22% | 8 h 40 min |
| December 13 | 41°F | 30°F | 44% | 22% | 8 h 40 min |
| December 14 | 41°F | 30°F | 44% | 22% | 8 h 40 min |
| December 15 | 41°F | 30°F | 44% | 22% | 8 h 40 min |
| December 16 | 40°F | 30°F | 44% | 22% | 8 h 40 min |
| December 17 | 40°F | 30°F | 44% | 22% | 8 h 40 min |
| December 18 | 40°F | 30°F | 44% | 22% | 8 h 40 min |
| December 19 | 40°F | 30°F | 44% | 22% | 8 h 40 min |
| December 20 | 40°F | 30°F | 44% | 22% | 8 h 40 min |
| December 21 | 40°F | 29°F | 44% | 22% | 8 h 40 min |
| December 22 | 40°F | 29°F | 44% | 22% | 8 h 40 min |
| December 23 | 40°F | 29°F | 44% | 22% | 8 h 40 min |
| December 24 | 40°F | 29°F | 44% | 22% | 8 h 40 min |
| December 25 | 40°F | 29°F | 44% | 22% | 8 h 40 min |
| December 26 | 40°F | 29°F | 44% | 22% | 8 h 40 min |
| December 27 | 40°F | 29°F | 44% | 22% | 8 h 40 min |
| December 28 | 40°F | 29°F | 44% | 22% | 8 h 40 min |
| December 29 | 40°F | 29°F | 44% | 22% | 8 h 40 min |
| December 30 | 40°F | 29°F | 44% | 22% | 8 h 40 min |
| December 31 | 41°F | 29°F | 44% | 22% | 8 h 40 min |
- Normal high
- 41°FDecember average
- Normal low
- 30°FDecember average
- Precipitation
- 2.23 inmonth total
- Days with precipitation
- 140.01 inch or more
- Snowfall
- 2.7 inmonth total
- Nights at 32°F or colder
- 20
- Daylight
- 9 h to 8 h 40 minDecember 1 to December 31
- Sunshine
- 55%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024160; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Walla Walla in December?
On a given December day the chance of 0.01 inch or more is 44% on average, highest around December 1 (45%). In all, 2.23 in falls on 14 days of a normal December.
In a normal December in Walla Walla, 20 nights fall to freezing, 8 days stay below freezing all day and snowfall averages 2.7 inches.
Snow falls on 2 days in a normal December, and an inch or more covers the ground on 3 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024160.
How humid and windy is Walla Walla in December?
At 3 p.m. the normal temperature is 36°F with 76% relative humidity and a dew point of 29°F; at 6 a.m. it is 32°F with 82% humidity. The wind averages 7.0 mph, most often from the south-southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 32°F | 27°F | 82% | 6.9 mph | – |
| 9 a.m. | 33°F | 28°F | 81% | 6.8 mph | – |
| noon | 35°F | 29°F | 77% | 7.4 mph | – |
| 3 p.m. | 36°F | 29°F | 76% | 7.1 mph | – |
| 6 p.m. | 34°F | 29°F | 80% | 7.0 mph | – |
| 9 p.m. | 34°F | 28°F | 80% | 7.3 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024160. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for December in Walla Walla?
The warmest December temperature on this station's record (since 1949) is 71°F, on December 10, 2014; the coldest is −24°F, on December 30, 1968. The wettest December brought 5.37 in (1973); the snowiest, 23.4 inches (1983).
The December mean against the 1991-2020 normal of 35.6°F: 2021 35.0°F (−0.6), 2022 28.6°F (−7.0), 2023 38.7°F (+3.1), 2024 38.6°F (+3.0), 2025 44.4°F (+8.8). 3 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 35.0°F | −0.6°F | 2.19 in |
| 2022 | 28.6°F | −7.0°F | 1.63 in |
| 2023 | 38.7°F | +3.1°F | 2.26 in |
| 2024 | 38.6°F | +3.0°F | 2.79 in |
| 2025 | 44.4°F | +8.8°F | 2.50 in |
Source: records: ACIS, station USW00024160; recent months: ACIS, station USW00024160. Records and recent months use complete months only.
How does December in Walla Walla 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; Walla Walla's is 41°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Walla Walla in November49°F by day, 36°F at night
- Walla Walla in January42°F by day, 31°F at night
- Walla Walla through the yearEvery month, frost dates, records and recent years
- Washington in DecemberThe statewide normal and the warmest and coolest places
- Grayland: Washington's warmest Decembernormal high 48°F