Coos Bay in Winter
In winter (December, January and February), Coos Bay sees average daytime highs around 51°F and overnight lows near 43°F, with 23.8 in of precipitation over about 50 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across winter, daytime highs hold fairly steady around 51°F. The sky is clear or mostly clear about 17% of the time across winter, and the air most often feels dry.
Winter is Coos Bay's weakest season of the year to visit on our travel score. For the whole year in context, see Coos Bay's year-round climate.
- Avg daytime high
- 51°F
- coldest season of the year
- Avg overnight low
- 43°F
- Precipitation
- 23.8 in
- 50 wet days
- Avg wind
- 10 mph
- Travel score
- 2.2
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Coos Bay in Winter
Across winter, daytime highs hold fairly steady around 51°F.
A typical winter day in Coos Bay reaches about 51°F and drops to 43°F overnight. The warmest of the three months is February, the coolest December.
Coos Bay weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 51° / 43° | 8.1 | 17.3 | 0.4 | 9.2 | 2.1 |
| Feb | 52° / 43° | 6.2 | 14.8 | 0.5 | 10.2 | 2.4 |
| Mar | 53° / 44° | 6.6 | 16.8 | 0.4 | 11.6 | 2.6 |
| Apr | 56° / 45° | 4.6 | 14.8 | 0.1 | 13.2 | 3.3 |
| May | 60° / 49° | 2.5 | 9.5 | 0 | 14.5 | 4.8 |
| Jun | 63° / 52° | 1.3 | 5.9 | 0 | 15.2 | 6.3 |
| Jul | 67° / 54° | 0.2 | 1.4 | 0 | 14.9 | 8.0 |
| Aug | 68° / 55° | 0.4 | 1.9 | 0 | 13.8 | 8.0 |
| Sep | 67° / 53° | 1.1 | 4.2 | 0 | 12.3 | 7.4 |
| Oct | 61° / 50° | 3.5 | 9.4 | 0 | 10.8 | 5.4 |
| Nov | 55° / 46° | 7.6 | 16.8 | 0.1 | 9.5 | 2.9 |
| Dec | 51° / 43° | 9.5 | 17.6 | 0.2 | 8.8 | 2.0 |
Cloud cover in Winter
The sky is clear or mostly clear about 17% of the time across winter.
Chance of precipitation in Winter
Coos Bay gets around 23.8 in of rain and snow over 50 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 10 mph across winter.
Sunrise & sunset in Winter
Daylight runs from about 9 hours in early December to 10 h 48 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 1.7 kWh/m².
Hazard calendar for Coos Bay
In winter, Coos Bay overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Coos Bay's rainy season runs November–April, when most of the year's rain falls.
Is winter a good time to visit Coos Bay?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a weaker month for outdoor sightseeing in Coos Bay.
What to pack for Coos Bay in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Coos Bay sees daytime highs around 51°F and nights near 43°F. Pack a warm layer and rain gear. About 50 days see rain.
Sea temperature near Coos Bay in Winter
The nearest coast averages about 51°F across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 8 mi away) is warmest in September at about 56°F and coldest in February near 51°F.
The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 51 | 51 | 51 | 52 | 53 | 55 | 55 | 56 | 56 | 55 | 53 | 52 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 51 | Bracing |
| Feb | 51 | Bracing |
| Mar | 51 | Bracing |
| Apr | 52 | Bracing |
| May | 53 | Bracing |
| Jun | 55 | Bracing |
| Jul | 55 | Bracing |
| Aug | 56 | Bracing |
| Sep | 56 | Bracing |
| Oct | 55 | Bracing |
| Nov | 53 | Bracing |
| Dec | 52 | Bracing |
UV index in Coos Bay in Winter
Clear-sky midday UV across winter averages around 2. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Coos Bay peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 2 | 4 | 5 | 9 | 8 | 9 | 7 | 5 | 4 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | Very high | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 2 | Moderate |
| Mar | 4 | Moderate |
| Apr | 5 | High |
| May | 9 | Very high |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 7 | Very high |
| Sep | 5 | Moderate |
| Oct | 4 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Where is Coos Bay?
Coos Bay sits at 43.4°N, 124.2°W, 23 ft above sea level, in United States. The nearest listed city is Roseburg, 45 mi away.
Topography around Coos Bay
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Coos Bay.
Within 2 miles, the terrain around Coos Bay has only modest variations in elevation — a maximum elevation change of 600 ft around an average of 112 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,742 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,088 ft.
The land around Coos Bay is covered by trees (54%) and water (20%) within 2 miles, trees (65%) and water (23%) within 10 miles, and trees (64%) and water (27%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Coos Bay (43.3665°, -124.2179°, elevation 23 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.