Marion County (Salem)
September
Weather in Marion County, Oregon for September 2027
Your guide to Marion County weather in September - trends and predictions
In general, the average temperature in Marion County at the beginning of September is 26.5 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21 °C by the end of September.
With an average of 5 rainy days, Marion County experiences minimal rainfall in September.
Is September a good time to visit Marion County? check out the best time to travel to Marion County page.
✨ Is September a good time to visit Marion County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
25
Dry days
5
Rainy days
0
Snow days
24°/11°
Temperatures
13 km/h
Avg max wind
69 %
Avg humidity
Marion County Weather September
Move between months or click on a day
Temperatures trend during September in Marion County
See the weather trend as well as the moving average line
September weather in Marion County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 27° /14° | 0.1 mm | 5 | |
| Sept. 2 |  Thundery outbreaks possible | 26° /12° | 25 mm | 5 | |
| Sept. 3 |  Heavy rain | 26° /13° | 26.7 mm | 6 | |
| Sept. 4 |  Moderate rain | 27° /12° | 10.4 mm | 6 | |
| Sept. 5 |  Mist | 28° /13° | 0.1 mm | 6 | |
| Sept. 6 |  Patchy rain possible | 26° /13° | 1.5 mm | 6 | |
| Sept. 7 | Mist | 25° /13° | 0 mm | 6 | |
| Sept. 8 |  Light rain | 26° /12° | 5.2 mm | 6 | |
| Sept. 9 | Patchy rain possible | 26° /12° | 1.1 mm | 6 | |
| Sept. 10 |  Partly cloudy | 26° /12° | 0 mm | 6 | |
| Sept. 11 | Light rain | 20° /11° | 4.4 mm | 4 | |
| Sept. 12 | Patchy rain possible | 23° /11° | 1.2 mm | 5 | |
| Sept. 13 | Mist | 22° /10° | 0.2 mm | 5 | |
| Sept. 14 |  Cloudy | 24° /10° | 0 mm | 6 | |
| Sept. 15 | Mist | 25° /10° | 0.1 mm | 5 | |
| Sept. 16 |  Sunny | 29° /10° | 0 mm | 5.8 | |
| Sept. 17 | Light rain | 24° /11° | 3.6 mm | 5 | |
| Sept. 18 | Overcast | 23° /12° | 0.8 mm | 5 | |
| Sept. 19 | Mist | 24° /10° | 0 mm | 5 | |
| Sept. 20 | Light rain shower | 23° /10° | 0.1 mm | 5 | |
| Sept. 21 | Light rain | 23° /9° | 2.8 mm | 5 | |
| Sept. 22 | Sunny | 24° /9° | 0.1 mm | 5 | |
| Sept. 23 | Patchy rain possible | 25° /10° | 0.1 mm | 5 | |
| Sept. 24 | Light rain | 26° /11° | 3.6 mm | 5 | |
| Sept. 25 |  Moderate or heavy rain with thunder | 18° /11° | 3.2 mm | 4 | |
| Sept. 26 | Patchy rain possible | 21° /9° | 1.8 mm | 4 | |
| Sept. 27 | Light rain | 22° /10° | 4 mm | 4.8 | |
| Sept. 28 | Overcast | 21° /9° | 0.5 mm | 4.7 | |
| Sept. 29 | Light rain | 18° /10° | 8.4 mm | 4 | |
| Sept. 30 | Light rain | 22° /8° | 3.6 mm | 4.6 | |
| Next | |||||
Important Notice
Our weather forecast for Marion 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 Marion County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Marion County in September - FAQ
What are the expected maximum and minimum temperatures in Marion County during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Marion County during September?
Significant rainfall exceeding 108.6 mm is expected in Marion 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 Marion County during September?
The average wind speed in Marion County during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Marion County
Explore the daily rainfall trends and prepare for Marion Countys September weather 💧
Typically, Marion County has 5 rainy days in September with a total of 108.6 mm of rainfall.
UV exposure in Marion County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Marion County
Select a location for an accurate weather forecast
More Locations Quick links
More Marion County weather pages
You are here
Found a mistake?
We appreciate your attention to details. Tell us here.