Coos Bay in Fall
In fall (September, October and November), Coos Bay sees average daytime highs around 61°F and overnight lows near 50°F, with 12.2 in of rain over about 30 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 68°F in early September to 52°F by late November. The sky is clear or mostly clear about 40% of the time across fall, and the air most often feels dry.
Fall is Coos Bay's 2nd-best season to visit on our travel score. For the whole year in context, see Coos Bay's year-round climate.
- Avg daytime high
- 61°F
- 2nd-warmest season
- Avg overnight low
- 50°F
- Rainfall
- 12.2 in
- 30 wet days
- Avg wind
- 9 mph
- Travel score
- 5.2
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Coos Bay in Fall
Over the season highs ease from about 68°F in early September to 52°F by late November.
A typical fall day in Coos Bay reaches about 61°F and drops to 50°F overnight. The warmest of the three months is September, the coolest November.
Coos Bay weather by month
How the three fall months (September, October and November) 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 Fall
The sky is clear or mostly clear about 40% of the time across fall.
Chance of precipitation in Fall
Coos Bay gets around 12.2 in of rain over 30 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 9 mph across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 hours in early September to 9 hours by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.3 kWh/m².
Hazard calendar for Coos Bay
In fall, 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 fall a good time to visit Coos Bay?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Coos Bay for sightseeing.
What to pack for Coos Bay in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Coos Bay sees daytime highs around 61°F and nights near 50°F. Pack rain gear. Worth having: a warm layer and sun protection. About 30 days see rain.
Sea temperature near Coos Bay in Fall
The nearest coast averages about 55°F across fall — 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 Fall
Clear-sky midday UV across fall averages around 3 — enough to warrant sun protection. 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.