Renton weather in December: Renton, Washington: normal highs, lows, rain and records for December
Renton in December has a normal high of 47°F and a normal low of 37°F, a daily mean of 42°F, falling from 49°F on the 1st to 47°F by the 31st. Measurable precipitation falls on 17 days in a normal December, 4.53 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 8°C and low of 3°C, 115 mm of precipitation in December.
- NOAA stationRenton Municipal Airport
- Station IDUSW00094248
- Location47.49°N 122.21°W
- Elevation29 ft (9 m)
- From the center1 miles
- Population105,543
- Jan 48° 37°
- Feb 50° 37°
- Mar 55° 40°
- Apr 60° 43°
- May 66° 49°
- Jun 71° 54°
- Jul 77° 58°
- Aug 78° 57°
- Sep 72° 53°
- Oct 61° 46°
- Nov 52° 40°
- Dec 47° 37°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Renton in December?
The normal high is 47°F and the normal low 37°F, for a daily mean of 41.8°F. December is 4.4°F cooler than November and 0.7°F cooler than January. December is the 12th warmest month of the year in Renton and the 3rd wettest. Across the month the normal high falls 2°F, from 49°F on December 1 to 47°F on December 31. From one year to the next December's mean temperature typically moves about 2.1°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 40°F and 44°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 59%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 49°F | 38°F | 55% | 37% |
| December 8 | 47°F | 37°F | 55% | 36% |
| December 15 | 47°F | 36°F | 57% | 36% |
| December 22 | 46°F | 36°F | 58% | 36% |
| December 31 | 47°F | 37°F | 59% | 36% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 16)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 49°F | 38°F | 55% | 37% | 8 h 50 min |
| December 2 | 48°F | 38°F | 55% | 36% | 8 h 40 min |
| December 3 | 48°F | 37°F | 55% | 36% | 8 h 40 min |
| December 4 | 48°F | 37°F | 55% | 36% | 8 h 40 min |
| December 5 | 48°F | 37°F | 55% | 36% | 8 h 40 min |
| December 6 | 48°F | 37°F | 55% | 36% | 8 h 40 min |
| December 7 | 48°F | 37°F | 55% | 36% | 8 h 40 min |
| December 8 | 47°F | 37°F | 55% | 36% | 8 h 40 min |
| December 9 | 47°F | 37°F | 56% | 36% | 8 h 30 min |
| December 10 | 47°F | 37°F | 56% | 36% | 8 h 30 min |
| December 11 | 47°F | 37°F | 56% | 36% | 8 h 30 min |
| December 12 | 47°F | 37°F | 56% | 36% | 8 h 30 min |
| December 13 | 47°F | 36°F | 56% | 36% | 8 h 30 min |
| December 14 | 47°F | 36°F | 57% | 36% | 8 h 30 min |
| December 15 | 47°F | 36°F | 57% | 36% | 8 h 30 min |
| December 16 | 47°F | 36°F | 57% | 36% | 8 h 30 min |
| December 17 | 47°F | 36°F | 57% | 36% | 8 h 30 min |
| December 18 | 47°F | 36°F | 58% | 36% | 8 h 30 min |
| December 19 | 47°F | 36°F | 58% | 36% | 8 h 30 min |
| December 20 | 46°F | 36°F | 58% | 36% | 8 h 30 min |
| December 21 | 46°F | 36°F | 58% | 36% | 8 h 30 min |
| December 22 | 46°F | 36°F | 58% | 36% | 8 h 30 min |
| December 23 | 46°F | 36°F | 58% | 36% | 8 h 30 min |
| December 24 | 47°F | 36°F | 58% | 36% | 8 h 30 min |
| December 25 | 47°F | 36°F | 58% | 36% | 8 h 30 min |
| December 26 | 47°F | 36°F | 58% | 36% | 8 h 30 min |
| December 27 | 47°F | 36°F | 58% | 36% | 8 h 30 min |
| December 28 | 47°F | 36°F | 58% | 36% | 8 h 30 min |
| December 29 | 47°F | 37°F | 59% | 36% | 8 h 30 min |
| December 30 | 47°F | 37°F | 59% | 36% | 8 h 30 min |
| December 31 | 47°F | 37°F | 59% | 36% | 8 h 30 min |
- Normal high
- 47°FDecember average
- Normal low
- 37°FDecember average
- Precipitation
- 4.53 inmonth total
- Days with precipitation
- 170.01 inch or more
- Nights at 32°F or colder
- 8
- Daylight
- 8 h 50 min to 8 h 30 minDecember 1 to December 31
- Sunshine
- 51%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094248; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Renton in December?
On a given December day the chance of 0.01 inch or more is 57% on average, highest around December 31 (59%). In all, 4.53 in falls on 17 days of a normal December, 1 of them with an inch or more.
In a normal December in Renton, 8 nights fall to freezing and 1 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094248.
What are the records for December in Renton?
The warmest December temperature on this station's record (since 1998) is 68°F, on December 10, 2014; the coldest is 15°F, on December 22, 1998. The wettest December brought 8.79 in (2015).
The December mean against the 1991-2020 normal of 41.8°F: 2021 39.1°F (−2.7), 2022 40.0°F (−1.8), 2023 45.9°F (+4.1), 2024 44.5°F (+2.7), 2025 45.8°F (+4.0). 3 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 39.1°F | −2.7°F | 2.37 in |
| 2022 | 40.0°F | −1.8°F | 3.34 in |
| 2023 | 45.9°F | +4.1°F | 4.19 in |
| 2024 | 44.5°F | +2.7°F | 1.95 in |
| 2025 | 45.8°F | +4.0°F | 6.68 in |
Source: records: ACIS, station USW00094248; recent months: ACIS, station USW00094248. Records and recent months use complete months only.
How does December in Renton 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; Renton's is 47°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.