Coos County (Coos Bay)
September
Weather in Coos County, Oregon for September 2027
Your guide to Coos County weather in September - trends and predictions
In general, the average temperature in Coos County 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 County experiences minimal rainfall in September.
Is September a good time to visit Coos County? check out the best time to travel to Coos County page.
✨ Is September a good time to visit Coos County? – 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 County Weather September
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Temperatures trend during September in Coos County
See the weather trend as well as the moving average line
September weather in Coos County 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 County 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 County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Coos County in September - FAQ
What are the expected maximum and minimum temperatures in Coos County 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 County during September?
Significant rainfall exceeding 141.4 mm is expected in Coos County 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 County during September?
The average wind speed in Coos County during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Coos County
Explore the daily rainfall trends and prepare for Coos Countys September weather 💧
Typically, Coos County has 5 rainy days in September with a total of 141.4 mm of rainfall.
UV exposure in Coos County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Coos County
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