Coos Bay (OR)
September
Weather in Coos Bay, Oregon for September 2027
Your guide to Coos Bay weather in September - trends and predictions
In general, the average temperature in Coos Bay at the beginning of September is 18.3 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 16.4 °C by the end of September.
With an average of 5 rainy days, Coos Bay experiences minimal rainfall in September.
Is September a good time to visit Coos Bay? check out the best time to travel to Coos Bay page.
✨ Is September a good time to visit Coos Bay? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
25
Dry days
5
Rainy days
0
Snow days
17°/12°
Temperatures
21 km/h
Avg max wind
87 %
Avg humidity
Coos Bay Weather September
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Temperatures trend during September in Coos Bay
See the weather trend as well as the moving average line
September weather in Coos Bay day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Cloudy | 18° /13° | 0.4 mm | 3 | |
| Sept. 2 |  Heavy rain | 17° /12° | 59.7 mm | 3 | |
| Sept. 3 |  Light rain | 18° /12° | 9.1 mm | 4 | |
| Sept. 4 |  Moderate rain | 20° /13° | 10.7 mm | 4 | |
| Sept. 5 |  Sunny | 19° /13° | 0 mm | 4 | |
| Sept. 6 |  Overcast | 18° /12° | 0.2 mm | 3 | |
| Sept. 7 | Overcast | 19° /13° | 0 mm | 5 | |
| Sept. 8 | Cloudy | 19° /12° | 0 mm | 5 | |
| Sept. 9 | Overcast | 21° /13° | 0 mm | 5 | |
| Sept. 10 |  Partly cloudy | 17° /12° | 0.1 mm | 4 | |
| Sept. 11 | Light rain | 17° /11° | 4.8 mm | 4 | |
| Sept. 12 | Moderate rain | 17° /11° | 10.9 mm | 4 | |
| Sept. 13 | Light rain | 16° /11° | 4.8 mm | 5 | |
| Sept. 14 | Light rain | 18° /11° | 3.5 mm | 5 | |
| Sept. 15 |  Patchy rain possible | 18° /11° | 0.3 mm | 5 | |
| Sept. 16 | Sunny | 19° /12° | 0 mm | 5 | |
| Sept. 17 | Moderate rain | 16° /12° | 11.7 mm | 4 | |
| Sept. 18 | Overcast | 16° /12° | 0.7 mm | 4 | |
| Sept. 19 | Overcast | 16° /12° | 0 mm | 4 | |
| Sept. 20 | Partly cloudy | 16° /11° | 0 mm | 5 | |
| Sept. 21 | Light rain | 16° /12° | 2.8 mm | 4 | |
| Sept. 22 | Overcast | 17° /11° | 0 mm | 4 | |
| Sept. 23 | Partly cloudy | 19° /11° | 0 mm | 5 | |
| Sept. 24 | Light rain | 19° /12° | 4.1 mm | 3 | |
| Sept. 25 | Light rain | 15° /12° | 4.8 mm | 3 | |
| Sept. 26 | Overcast | 17° /11° | 0 mm | 4 | |
| Sept. 27 | Overcast | 16° /10° | 0 mm | 4 | |
| Sept. 28 | Overcast | 14° /9° | 0 mm | 3 | |
| Sept. 29 | Moderate rain | 17° /11° | 13 mm | 4 | |
| Sept. 30 | Overcast | 17° /12° | 0 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Coos Bay in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Coos Bay forecast closer to your planned date for the most up-to-date weather information.
Change Month
Coos Bay in September - FAQ
What are the expected maximum and minimum temperatures in Coos Bay during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Coos Bay during September?
Significant rainfall exceeding 141.4 mm is expected in Coos Bay during September, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Coos Bay during September?
The average wind speed in Coos Bay during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Coos Bay
Explore the daily rainfall trends and prepare for Coos Bays September weather 💧
Typically, Coos Bay has 5 rainy days in September with a total of 141.4 mm of rainfall.
UV exposure in Coos Bay during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Coos Bay?Get accurate weather forecasts for Coos Bay, located at latitude 43.367 and longitude -124.218. Stay updated with localized weather information tailored for Coos Bay.
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