Coos Bay weather in December: Coos Bay, Oregon: normal highs, lows, rain and records for December
Coos Bay in December has a normal high of 51°F and a normal low of 36°F, a daily mean of 44°F, falling from 53°F on the 1st to 51°F by the 31st. Measurable precipitation falls on 20 days in a normal December, 10.90 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 11°C and low of 2°C, 277 mm of precipitation in December.
- NOAA stationCoos Bay (8 mi SW)
- Station IDUSW00004141
- Location43.27°N 124.32°W
- Elevation12 ft (4 m)
- Population15,801
- Jan 52° 36°
- Feb 54° 37°
- Mar 56° 38°
- Apr 57° 39°
- May 60° 44°
- Jun 62° 47°
- Jul 64° 51°
- Aug 66° 50°
- Sep 66° 47°
- Oct 63° 42°
- Nov 56° 39°
- Dec 51° 36°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Coos Bay in December?
The normal high is 51°F and the normal low 36°F, for a daily mean of 43.8°F. December is 3.7°F cooler than November and 0.1°F cooler than January. December is the 12th warmest month of the year in Coos Bay and the wettest. Across the month the normal high falls 2°F, from 53°F on December 1 to 51°F on December 31. From one year to the next December's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 42°F and 46°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 65%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 53°F | 37°F | 61% | 47% |
| December 8 | 52°F | 37°F | 62% | 48% |
| December 15 | 51°F | 36°F | 64% | 49% |
| December 22 | 51°F | 36°F | 65% | 49% |
| December 31 | 51°F | 36°F | 64% | 48% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 25)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 53°F | 37°F | 61% | 47% | 9 h 10 min |
| December 2 | 53°F | 37°F | 61% | 48% | 9 h 10 min |
| December 3 | 53°F | 37°F | 61% | 48% | 9 h 10 min |
| December 4 | 52°F | 37°F | 61% | 48% | 9 h 10 min |
| December 5 | 52°F | 37°F | 61% | 48% | 9 h 10 min |
| December 6 | 52°F | 37°F | 62% | 48% | 9 h 10 min |
| December 7 | 52°F | 37°F | 62% | 48% | 9 h 10 min |
| December 8 | 52°F | 37°F | 62% | 48% | 9 h 10 min |
| December 9 | 52°F | 37°F | 62% | 49% | 9 h |
| December 10 | 52°F | 37°F | 62% | 49% | 9 h |
| December 11 | 52°F | 37°F | 63% | 49% | 9 h |
| December 12 | 51°F | 36°F | 63% | 49% | 9 h |
| December 13 | 51°F | 36°F | 63% | 49% | 9 h |
| December 14 | 51°F | 36°F | 64% | 49% | 9 h |
| December 15 | 51°F | 36°F | 64% | 49% | 9 h |
| December 16 | 51°F | 36°F | 64% | 49% | 9 h |
| December 17 | 51°F | 36°F | 64% | 49% | 9 h |
| December 18 | 51°F | 36°F | 64% | 50% | 9 h |
| December 19 | 51°F | 36°F | 65% | 50% | 9 h |
| December 20 | 51°F | 36°F | 65% | 50% | 9 h |
| December 21 | 51°F | 36°F | 65% | 50% | 9 h |
| December 22 | 51°F | 36°F | 65% | 49% | 9 h |
| December 23 | 51°F | 36°F | 65% | 49% | 9 h |
| December 24 | 51°F | 36°F | 65% | 49% | 9 h |
| December 25 | 51°F | 36°F | 65% | 49% | 9 h |
| December 26 | 51°F | 36°F | 65% | 49% | 9 h |
| December 27 | 51°F | 36°F | 65% | 49% | 9 h |
| December 28 | 51°F | 36°F | 65% | 49% | 9 h |
| December 29 | 51°F | 36°F | 65% | 49% | 9 h |
| December 30 | 51°F | 36°F | 64% | 49% | 9 h |
| December 31 | 51°F | 36°F | 64% | 48% | 9 h |
- Normal high
- 51°FDecember average
- Normal low
- 36°FDecember average
- Precipitation
- 10.90 inmonth total
- Days with precipitation
- 200.01 inch or more
- Nights at 32°F or colder
- 12
- Daylight
- 9 h 10 min to 9 hDecember 1 to December 31
- Sunshine
- 58%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00004141; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Coos Bay in December?
On a given December day the chance of 0.01 inch or more is 63% on average, highest around December 24 (65%). In all, 10.90 in falls on 20 days of a normal December, 3 of them with an inch or more.
In a normal December in Coos Bay, 12 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00004141.
What are the records for December in Coos Bay?
The December mean against the 1991-2020 normal of 43.8°F: 2021 43.8°F (at normal), 2022 43.7°F (−0.1), 2023 49.1°F (+5.3), 2024 46.1°F (+2.3), 2025 48.0°F (+4.2). 3 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 43.8°F | at normal | 12.69 in |
| 2022 | 43.7°F | −0.1°F | 9.28 in |
| 2023 | 49.1°F | +5.3°F | 17.36 in |
| 2024 | 46.1°F | +2.3°F | 11.34 in |
| 2025 | 48.0°F | +4.2°F | 9.11 in |
Source: recent months: ACIS, station USW00004141. Records and recent months use complete months only.
How does December in Coos Bay compare across Oregon?
Across the 105 places PlainClimate covers in Oregon, December normal highs run from 33°F in Halfway to 55°F in Bandon; Coos Bay's is 51°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.