Coos Bay (OR) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Coos Bay.
Climate overview of Coos Bay
The climate in Coos Bay, Oregon, United States of America, sees a moderate range of temperatures across the year, from 20°C (68°F) in August down to 11°C (52°F) in December.
With around 1576 mm (62 in) of annual rain/snowfall, Coos Bay has a notably wet climate. However, this rain/snowfall is not evenly distributed, the city has distinct dry (July to August) and wet (November to March) seasons. The wettest month is December.
Coos Bay Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Coos Bay - and find the best time to visit.
Monthly Temperature in Coos Bay
The climate in Coos Bay experiences moderate temperature changes, with mild shifts between seasons. Average daytime temperatures reach a pleasant 20°C (68°F) in August. In December, the coolest month of the year, temperatures drop to a chilly 11°C (52°F).
At night, temperatures range from around 11°C (52°F) in August to 3°C (37°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Coos Bay
Coos Bay experiences significant rain/snowfall throughout the year, averaging 1576 mm (62 in) of precipitation annually. Coos Bay can be quite wet during December, receiving approximately 298 mm (12 in) of precipitation over 21 rainy days.
In contrast, during the driest month (July), you will experience much drier conditions, with 13 mm (0.5 in) of precipitation spread across 4 rainy days. For more details, please visit our Coos Bay Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Coos Bay
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July, August and September
- Warmest weather: July, August and September
- Fewest rainy days: July and August
- Wettest months: January, February, March, November and December, when rainfall is highest.
- Seasonal pattern: Distinct dry (July to August) and wet (November to March) seasons
Frequently asked questions about the climate in Coos Bay
What is the best time to visit Coos Bay?
July, August and September typically offer the most optimal weather in Coos Bay. In contrast, January, February, March, November and December tend to have less optimal conditions. Coos Bay has distinct dry (July to August) and wet (November to March) seasons.
What temperatures can I expect in Coos Bay?
Daytime highs range from 11°C (52°F) in December to 20°C (68°F) in August. Nighttime lows range from 3°C (37°F) to 11°C (52°F).
How much rain does Coos Bay get?
Annual rainfall is around 1576 mm (62 in). December is the wettest month with 298 mm (12 in), while July is the driest with 13 mm (0.5 in).
Coos Bay 3-Day Forecast
Coos Bay on the map
Coos Bay is highlighted - select any city to see its climate.
Popular this month
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