Pasco weather in December: Pasco, Washington: normal highs, lows, rain and records for December
Pasco in December has a normal high of 41°F and a normal low of 27°F, a daily mean of 34°F, falling from 44°F on the 1st to 40°F by the 31st. Measurable precipitation falls on 10 days in a normal December, 1.03 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 5°C and low of −3°C, 26 mm of precipitation in December.
- NOAA stationPasco Tri Cities Airport
- Station IDUSW00024163
- Location46.27°N 119.12°W
- Elevation407 ft (124 m)
- Population81,724
- Jan 41° 28°
- Feb 49° 28°
- Mar 59° 33°
- Apr 67° 38°
- May 77° 46°
- Jun 83° 53°
- Jul 93° 57°
- Aug 91° 56°
- Sep 81° 48°
- Oct 66° 38°
- Nov 50° 32°
- Dec 41° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Pasco in December?
The normal high is 41°F and the normal low 27°F, for a daily mean of 34.1°F. December is 6.8°F cooler than November and 0.5°F cooler than January. December is the 12th warmest month of the year in Pasco and the wettest. Across the month the normal high falls 4°F, from 44°F on December 1 to 40°F on December 31. From one year to the next December's mean temperature typically moves about 3.5°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 31°F and 38°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 34%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 44°F | 29°F | 32% | 9% |
| December 8 | 42°F | 28°F | 32% | 10% |
| December 15 | 41°F | 27°F | 33% | 11% |
| December 22 | 40°F | 27°F | 33% | 12% |
| December 31 | 40°F | 27°F | 33% | 13% |
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 | 44°F | 29°F | 32% | 9% | 8 h 50 min |
| December 2 | 43°F | 29°F | 32% | 9% | 8 h 50 min |
| December 3 | 43°F | 29°F | 32% | 9% | 8 h 50 min |
| December 4 | 43°F | 29°F | 32% | 9% | 8 h 50 min |
| December 5 | 43°F | 29°F | 32% | 9% | 8 h 50 min |
| December 6 | 42°F | 28°F | 32% | 10% | 8 h 50 min |
| December 7 | 42°F | 28°F | 32% | 10% | 8 h 50 min |
| December 8 | 42°F | 28°F | 32% | 10% | 8 h 40 min |
| December 9 | 42°F | 28°F | 33% | 10% | 8 h 40 min |
| December 10 | 41°F | 28°F | 33% | 10% | 8 h 40 min |
| December 11 | 41°F | 28°F | 33% | 11% | 8 h 40 min |
| December 12 | 41°F | 27°F | 33% | 11% | 8 h 40 min |
| December 13 | 41°F | 27°F | 33% | 11% | 8 h 40 min |
| December 14 | 41°F | 27°F | 33% | 11% | 8 h 40 min |
| December 15 | 41°F | 27°F | 33% | 11% | 8 h 40 min |
| December 16 | 41°F | 27°F | 33% | 11% | 8 h 40 min |
| December 17 | 40°F | 27°F | 33% | 11% | 8 h 40 min |
| December 18 | 40°F | 27°F | 33% | 12% | 8 h 40 min |
| December 19 | 40°F | 27°F | 33% | 12% | 8 h 40 min |
| December 20 | 40°F | 27°F | 33% | 12% | 8 h 40 min |
| December 21 | 40°F | 27°F | 33% | 12% | 8 h 40 min |
| December 22 | 40°F | 27°F | 33% | 12% | 8 h 40 min |
| December 23 | 40°F | 27°F | 33% | 12% | 8 h 40 min |
| December 24 | 40°F | 27°F | 33% | 13% | 8 h 40 min |
| December 25 | 40°F | 27°F | 33% | 13% | 8 h 40 min |
| December 26 | 40°F | 27°F | 33% | 13% | 8 h 40 min |
| December 27 | 40°F | 27°F | 33% | 13% | 8 h 40 min |
| December 28 | 40°F | 27°F | 34% | 13% | 8 h 40 min |
| December 29 | 40°F | 27°F | 33% | 13% | 8 h 40 min |
| December 30 | 40°F | 27°F | 33% | 13% | 8 h 40 min |
| December 31 | 40°F | 27°F | 33% | 13% | 8 h 40 min |
- Normal high
- 41°FDecember average
- Normal low
- 27°FDecember average
- Precipitation
- 1.03 inmonth total
- Days with precipitation
- 100.01 inch or more
- Nights at 32°F or colder
- 23
- 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 USW00024163; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Pasco in December?
On a given December day the chance of 0.01 inch or more is 33% on average, highest around December 28 (34%). In all, 1.03 in falls on 10 days of a normal December.
In a normal December in Pasco, 23 nights fall to freezing and 6 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024163.
What are the records for December in Pasco?
The warmest December temperature on this station's record (since 1945) is 71°F, on December 1, 2021; the coldest is −9°F, on December 16, 2016. The wettest December brought 2.16 in (2024); the snowiest, 9.0 inches (2016).
The December mean against the 1991-2020 normal of 34.1°F: 2021 35.9°F (+1.8), 2022 25.7°F (−8.4), 2023 38.2°F (+4.1), 2024 38.4°F (+4.3), 2025 43.0°F (+8.9). 4 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 35.9°F | +1.8°F | 1.00 in |
| 2022 | 25.7°F | −8.4°F | 0.59 in |
| 2023 | 38.2°F | +4.1°F | 1.44 in |
| 2024 | 38.4°F | +4.3°F | 2.16 in |
| 2025 | 43.0°F | +8.9°F | 1.76 in |
Source: records: ACIS, station USW00024163; recent months: ACIS, station USW00024163. Records and recent months use complete months only.
How does December in Pasco 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; Pasco's is 41°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.