Coos Bay

Stay up to date with the current weather conditions in Coos Bay. Below you will find the latest data, forecasts, and visual charts to help you plan your time effectively.

The climate in Coos Bay can be described as temperate maritime, with distinct seasons. The city does not experience extreme temperature fluctuations, making it an attractive destination throughout the year; however, weather conditions—especially precipitation—change significantly depending on the season.

Coos Bay is characterized by mild and relatively wet winters. From November to March, the highest amount of precipitation occurs, reaching 7 mm in January and December, with up to 19 rainy days per month. Average winter temperatures range from 7.6°C to 8.8°C. In contrast, summer is warm and sunny, with minimal precipitation. July and August are the driest months, when rainfall is almost non-existent. Average summer temperatures are a comfortable 15-18°C, with highs reaching 21-22°C. Spring and autumn are transitional seasons with moderate temperatures and a gradual shift in humidity levels.

The climate in Coos Bay is characterized by moderate temperatures throughout the year, without sharp extremes. The warmest month is usually August, when the average temperature reaches 17.6°C, and daily highs can rise to 21.7°C. The coolest month is February, with an average temperature of 7.6°C and minimum night temperatures around 4.9°C. Overall, the annual temperature progression is smooth, making the city attractive for visiting in different seasons.

Summer months in Coos Bay, especially July and August, offer pleasantly warm weather. Daytime temperatures mainly range from 18°C to 22°C, which is ideal for walking and outdoor activities. Winters here are mild and cool, without severe frosts. Average temperatures in December, January, and February stay in the 7.6°C to 8.8°C range. It is worth noting that the difference between daytime and nighttime temperatures can be noticeable, especially in summer, averaging 8°C, while in winter these fluctuations are smaller, around 5-6°C.

Coos Bay experiences distinct seasonality in precipitation throughout the year. There is a clearly defined wet season, occurring primarily in the autumn, winter, and early spring months, and a significantly drier summer period.

The highest amount of rainfall occurs from November to March. January and December are the wettest months: each averages about 7 mm of precipitation, spread over approximately 19 rainy days. February (6 mm, 16 days), November (6 mm, 16 days), and March (5 mm, 16 days) also see a significant number of days with precipitation. The rainfall during these months is typically frequent but light, often appearing as a gentle drizzle. Given that average monthly temperatures remain above freezing even in winter, snowfall is unlikely.

In contrast, the summer months are characterized by minimal precipitation. July stands out as a completely dry month, with no average rainfall (0 mm) and zero rainy days. August is also very dry—only 0 mm of precipitation and just one rainy day on average. The transition to drier weather begins in May (2 mm of precipitation, 9 rainy days) and continues in June (1 mm of precipitation, 6 rainy days).

Thus, Coos Bay experiences its peak precipitation during the winter, particularly in December and January, when rains are frequent but usually light. Summer, especially July and August, represents the driest season, when precipitation becomes extremely rare.

When planning a trip to Coos Bay, it is important to consider the variable weather of the US coastal region. Layering is key when packing. This will ensure you feel comfortable during cool mornings as well as warmer daytime hours, and keep you prepared for the coastal winds. Regardless of the season, comfortable walking shoes will be your best companion for exploring the city and its surroundings.

From late autumn to early spring (roughly October-November to March-April), Coos Bay is dominated by cool and damp weather. Average temperatures during this period range from 7°C to 11°C, and you can expect a significant number of rainy days—up to 19 per month. Therefore, be sure to pack a waterproof and windproof jacket, a reliable umbrella, and water-resistant shoes. Don't forget warm items like sweaters, fleece jackets, and warm socks to stay cozy during your walks.

Summer months, especially July and August, bring warmer and drier weather to Coos Bay, with average temperatures around 17-18°C and highs reaching 21-22°C. Precipitation is minimal during this time. Light clothing such as T-shirts, shorts, and dresses is suitable for this season. However, even in summer, evenings can be chilly (around 11-13°C), so a light jacket or sweater will come in handy. On sunny days, don't forget sunscreen, a hat, and sunglasses. During transitional months like May, June, and September, the weather is usually pleasant, but a light jacket and readiness for occasional rain are still advisable.