Coos Bay in Summer
In summer (June, July and August), Coos Bay sees average daytime highs around 66°F and overnight lows near 54°F, with 1.9 in of rain over about 9 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 62°F in early June to 68°F by late August. The sky is clear or mostly clear about 58% of the time across summer, and the air most often feels dry.
Summer is Coos Bay's best 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
- 66°F
- warmest season of the year
- Avg overnight low
- 54°F
- Rainfall
- 1.9 in
- 9 wet days
- Avg wind
- 9 mph
- Travel score
- 7.4
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Coos Bay in Summer
Over the season highs climb from about 62°F in early June to 68°F by late August.
A typical summer day in Coos Bay reaches about 66°F and drops to 54°F overnight. The warmest of the three months is August, the coolest June.
Coos Bay weather by month
How the three summer months (June, July and August) 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 Summer
The sky is clear or mostly clear about 58% of the time across summer.
Chance of precipitation in Summer
Coos Bay gets around 1.9 in of rain over 9 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 9 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 hours in early June to 13 h 06 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.7 kWh/m².
Hazard calendar for Coos Bay
None of Coos Bay's seasonal hazards peak in summer. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Coos Bay's rainy season runs November–April, when most of the year's rain falls.
Is summer a good time to visit Coos Bay?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is one of the better times to visit Coos Bay for general sightseeing.
What to pack for Coos Bay in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Coos Bay sees daytime highs around 66°F and nights near 54°F. Pack sun protection. About 9 days see rain.
Sea temperature near Coos Bay in Summer
The nearest coast averages about 55°F across summer — 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 Summer
Clear-sky midday UV across summer averages around 8 — 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.