Oregon (Portland)
September
Weather in Oregon for September 2027
Your guide to Oregon weather in September - trends and predictions
In general, the average temperature in Oregon at the beginning of September is 25.8 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.6 °C by the end of September.
Oregon experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 83.3 mm.
Is September a good time to visit Oregon? check out the best time to travel to Oregon page.
✨ Is September a good time to visit Oregon? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
24
Dry days
6
Rainy days
0
Snow days
23°/13°
Temperatures
10 km/h
Avg max wind
64 %
Avg humidity
Oregon Weather September
Move between months or click on a day
What’s the Weather Like in Oregon This September?
Discover the average temperatures and weather trends across Oregon’s cities this September.
Temperatures trend during September in Oregon
See the weather trend as well as the moving average line
September weather in Oregon day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 27° /15° | 0.1 mm | 5 | |
| Sept. 2 |  Moderate rain | 26° /14° | 13.1 mm | 6 | |
| Sept. 3 |  Light rain | 24° /15° | 3.6 mm | 5 | |
| Sept. 4 | Light rain | 25° /13° | 6.4 mm | 5 | |
| Sept. 5 |  Sunny | 29° /15° | 0 mm | 6.7 | |
| Sept. 6 | Moderate rain | 26° /16° | 10.1 mm | 6 | |
| Sept. 7 | Overcast | 25° /14° | 0.1 mm | 5 | |
| Sept. 8 | Light rain | 26° /14° | 3.9 mm | 6 | |
| Sept. 9 | Light rain | 27° /14° | 7.6 mm | 6 | |
| Sept. 10 | Overcast | 24° /14° | 0 mm | 6 | |
| Sept. 11 | Light rain | 20° /13° | 2.8 mm | 4 | |
| Sept. 12 |  Patchy rain possible | 21° /12° | 1.2 mm | 4 | |
| Sept. 13 | Overcast | 22° /11° | 0.4 mm | 5 | |
| Sept. 14 | Patchy rain possible | 24° /12° | 1.2 mm | 5.9 | |
| Sept. 15 | Sunny | 25° /11° | 0.2 mm | 5 | |
| Sept. 16 | Sunny | 29° /13° | 0 mm | 5.7 | |
| Sept. 17 | Light rain | 24° /14° | 3 mm | 5.6 | |
| Sept. 18 | Overcast | 22° /13° | 0 mm | 5 | |
| Sept. 19 | Overcast | 24° /13° | 0 mm | 5.4 | |
| Sept. 20 | Sunny | 23° /13° | 0.3 mm | 5 | |
| Sept. 21 | Light rain | 22° /11° | 4.3 mm | 5 | |
| Sept. 22 | Sunny | 23° /12° | 0.1 mm | 5 | |
| Sept. 23 | Light rain shower | 24° /13° | 0.4 mm | 5 | |
| Sept. 24 | Patchy rain possible | 25° /13° | 1.8 mm | 5 | |
| Sept. 25 | Light rain | 19° /13° | 5.4 mm | 4 | |
| Sept. 26 | Light rain | 20° /11° | 2.7 mm | 4 | |
| Sept. 27 | Light rain | 22° /12° | 3.2 mm | 4.7 | |
| Sept. 28 | Overcast | 20° /11° | 0.1 mm | 4 | |
| Sept. 29 | Light rain | 18° /11° | 5 mm | 3 | |
| Sept. 30 | Light rain | 21° /11° | 6.2 mm | 4.4 | |
| Next | |||||
Important Notice
Our weather forecast for Oregon 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 Oregon forecast closer to your planned date for the most up-to-date weather information.
Change Month
Oregon in September - FAQ
What are the expected maximum and minimum temperatures in Oregon during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Oregon during September?
Moderate rainfall is anticipated in Oregon during September, with a total of 83.3 mm spread over approximately 6 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Oregon during September?
The average wind speed in Oregon during September is 10 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Oregon
Explore the daily rainfall trends and prepare for Oregons September weather 💧
Typically, Oregon has 6 rainy days in September with a total of 83.3 mm of rainfall.
UV exposure in Oregon during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Counties in Oregon
Select a county for an accurate weather forecast
Top locations in Oregon
Select a location for an accurate weather forecast
More Locations Quick links
More Oregon weather pages
You are here
Found a mistake?
We appreciate your attention to details. Tell us here.