Pendleton (OR)
September
Weather in Pendleton, Oregon for September 2026
Your guide to Pendleton weather in September - trends and predictions
Until now, September 2026 in Pendleton is cooler than usual, with temperatures averaging 23.1 °F, this is 3.3 °F below the typical seasonal average.
The forecast for the next days in Pendleton predicts temperatures to be around 22 °F, close to the historical average.
In general, the average temperature in Pendleton at the beginning of September is 29 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.4 °F by the end of September.
With an average of 3 rainy days, Pendleton experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
More
27
Dry days
3
Rainy days
0
Snow days
28°/15°
Temperatures
17 km/h
Avg max wind
44 %
Avg humidity
Pendleton Weather September
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Temperatures trend during September in Pendleton
See the weather trend as well as the moving average line
September weather in Pendleton day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 32° /15° | 0 mm | 5 | |
| Sept. 2 | Sunny | 32° /16° | 2.1 mm | 5 | |
| Sept. 3 |  Partly cloudy | 28° /17° | 38.7 mm | 5 | |
| Sept. 4 | Partly cloudy | 30° /14° | 0.9 mm | 8 | |
| Sept. 5 | Partly cloudy | 29° /15° | 0 mm | 7 | |
| Sept. 6 |  Cloudy | 25° /14° | 9.8 mm | 5 | |
| Sept. 7 | Sunny | 27° /14° | 0.4 mm | 6 | |
| Sept. 8 |  Overcast | 27° /12° | 0 mm | 7 | |
| Sept. 9 |  Thundery outbreaks possible | 24° /12° | 1.4 mm | 6 | |
| Sept. 10 | Thundery outbreaks possible | 28° /12° | 0 mm | 5 | |
| Sept. 11 | Thundery outbreaks possible | 25° /13° | 4 mm | 5 | |
| Sept. 12 | Sunny | 25° /10° | 3.5 mm | 4 | |
| Sept. 13 | Sunny | 23° /13° | 3.4 mm | 5 | |
| Sept. 14 |  Patchy light rain | 19° /12° | 0.7 mm | 5 | |
| Sept. 15 | Sunny | 22° /9° | 0.1 mm | 4 | |
| Sept. 16 | Sunny | 25° /11° | 0.2 mm | 6 | |
| Sept. 17 | Sunny | 31° /14° | 0 mm | 8 | |
| Sept. 18 | Sunny | 23° /17° | 0.2 mm | 4.9 | |
| Sept. 19 | Sunny | 25° /17° | 0 mm | 5 | |
| Sept. 20 | Overcast | 27° /18° | 0 mm | 5 | |
| Sept. 21 | Sunny | 26° /19° | 0 mm | 5.4 | |
| Sept. 22 | Overcast | 22° /16° | 0 mm | 6 | |
| Sept. 23 | Sunny | 22° /15° | 0 mm | 6 | |
| Sept. 24 | Overcast | 25° /17° | 0 mm | 7 | |
| Sept. 25 | Overcast | 20° /14° | 0 mm | 5 | |
| Sept. 26 | Overcast | 18° /11° | 0 mm | 5 | |
| Sept. 27 | Overcast | 18° /13° | 0 mm | 5 | |
| Sept. 28 | Sunny | 21° /13° | 0 mm | 6 | |
| Sept. 29 | Overcast | 19° /16° | 0 mm | 4 | |
| Sept. 30 | Overcast | 22° /15° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Pendleton 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 Pendleton forecast closer to your planned date for the most up-to-date weather information.
Change Month
Pendleton in September - FAQ
What are the expected maximum and minimum temperatures in Pendleton during September?
During September, expect a variety of temperatures with highs around 28° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Pendleton during September?
Rainfall in Pendleton during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 3 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Pendleton during September?
The average wind speed in Pendleton during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Pendleton
Explore the daily rainfall trends and prepare for Pendletons September weather 💧
Typically, Pendleton has 3 rainy days in September with a total of 9.5 mm of rainfall.
UV exposure in Pendleton during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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