Kennewick weather in December: Kennewick, Washington: normal highs, lows, rain and records for December
Kennewick in December has a normal high of 42°F and a normal low of 30°F, a daily mean of 36°F, falling from 45°F on the 1st to 40°F by the 31st. Measurable precipitation falls on 11 days in a normal December, 1.08 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 5°C and low of −1°C, 27 mm of precipitation in December.
- NOAA stationKennewick
- Station IDUSC00454154
- Location46.21°N 119.10°W
- Elevation390 ft (119 m)
- From the center4 miles
- Population86,728
- Jan 42° 29°
- Feb 48° 31°
- Mar 58° 36°
- Apr 66° 42°
- May 75° 50°
- Jun 82° 56°
- Jul 91° 62°
- Aug 90° 61°
- Sep 81° 53°
- Oct 66° 43°
- Nov 51° 35°
- Dec 42° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Kennewick in December?
The normal high is 42°F and the normal low 30°F, for a daily mean of 35.6°F. December is 7.3°F cooler than November and 0.1°F warmer than January. December is the 11th warmest month of the year in Kennewick and the 2nd wettest. Across the month the normal high falls 5°F, from 45°F on December 1 to 40°F on December 31. From one year to the next December's mean temperature typically moves about 3.6°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 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 45°F | 32°F | 32% | 10% |
| December 8 | 43°F | 31°F | 33% | 11% |
| December 15 | 41°F | 29°F | 34% | 12% |
| December 22 | 40°F | 29°F | 35% | 12% |
| December 31 | 40°F | 29°F | 36% | 14% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 26)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 45°F | 32°F | 32% | 10% | 9 h |
| December 2 | 44°F | 32°F | 32% | 10% | 8 h 50 min |
| December 3 | 44°F | 31°F | 32% | 10% | 8 h 50 min |
| December 4 | 44°F | 31°F | 32% | 10% | 8 h 50 min |
| December 5 | 43°F | 31°F | 32% | 10% | 8 h 50 min |
| December 6 | 43°F | 31°F | 32% | 11% | 8 h 50 min |
| December 7 | 43°F | 31°F | 33% | 11% | 8 h 50 min |
| December 8 | 43°F | 31°F | 33% | 11% | 8 h 50 min |
| December 9 | 42°F | 30°F | 33% | 11% | 8 h 40 min |
| December 10 | 42°F | 30°F | 33% | 11% | 8 h 40 min |
| December 11 | 42°F | 30°F | 34% | 11% | 8 h 40 min |
| December 12 | 42°F | 30°F | 34% | 11% | 8 h 40 min |
| December 13 | 42°F | 30°F | 34% | 12% | 8 h 40 min |
| December 14 | 41°F | 30°F | 34% | 12% | 8 h 40 min |
| December 15 | 41°F | 29°F | 34% | 12% | 8 h 40 min |
| December 16 | 41°F | 29°F | 34% | 12% | 8 h 40 min |
| December 17 | 41°F | 29°F | 35% | 12% | 8 h 40 min |
| December 18 | 41°F | 29°F | 35% | 12% | 8 h 40 min |
| December 19 | 41°F | 29°F | 35% | 12% | 8 h 40 min |
| December 20 | 41°F | 29°F | 35% | 12% | 8 h 40 min |
| December 21 | 40°F | 29°F | 35% | 12% | 8 h 40 min |
| December 22 | 40°F | 29°F | 35% | 12% | 8 h 40 min |
| December 23 | 40°F | 29°F | 35% | 12% | 8 h 40 min |
| December 24 | 40°F | 29°F | 35% | 13% | 8 h 40 min |
| December 25 | 40°F | 29°F | 35% | 13% | 8 h 40 min |
| December 26 | 40°F | 29°F | 36% | 13% | 8 h 40 min |
| December 27 | 40°F | 29°F | 36% | 13% | 8 h 40 min |
| December 28 | 40°F | 29°F | 36% | 13% | 8 h 40 min |
| December 29 | 40°F | 29°F | 36% | 13% | 8 h 40 min |
| December 30 | 40°F | 29°F | 36% | 13% | 8 h 40 min |
| December 31 | 40°F | 29°F | 36% | 14% | 8 h 40 min |
- Normal high
- 42°FDecember average
- Normal low
- 30°FDecember average
- Precipitation
- 1.08 inmonth total
- Days with precipitation
- 110.01 inch or more
- Nights at 32°F or colder
- 19
- 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 USC00454154; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Kennewick in December?
On a given December day the chance of 0.01 inch or more is 34% on average, highest around December 31 (36%). In all, 1.08 in falls on 11 days of a normal December.
In a normal December in Kennewick, 19 nights fall to freezing and 5 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00454154.
What are the records for December in Kennewick?
The warmest December temperature on this station's record (since 1894) is 72°F, on December 2, 2021; the coldest is −29°F, on December 13, 1919. The wettest December brought 3.47 in (1973); the snowiest, 16.3 inches (1955).
The December mean against the 1991-2020 normal of 35.6°F: 2021 38.4°F (+2.8), 2022 26.4°F (−9.2), 2023 39.3°F (+3.7), 2024 39.9°F (+4.3), 2025 45.2°F (+9.6). 4 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 38.4°F | +2.8°F | 1.25 in |
| 2022 | 26.4°F | −9.2°F | 1.63 in |
| 2023 | 39.3°F | +3.7°F | 1.41 in |
| 2024 | 39.9°F | +4.3°F | 2.08 in |
| 2025 | 45.2°F | +9.6°F | 1.96 in |
Source: records: ACIS, station USC00454154; recent months: ACIS, station USC00454154. Records and recent months use complete months only.
How does December in Kennewick 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; Kennewick's is 42°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Kennewick in November51°F by day, 35°F at night
- Kennewick in January42°F by day, 29°F at night
- Kennewick 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