Grants Pass (OR)
September
Weather in Grants Pass, Oregon for September 2025
Your guide to Grants Pass weather in September - trends and predictions
Until now, September 2025 in Grants Pass is slightly cooler than the historical average by -1.8 °F.
The forecast for the next days in Grants Pass predicts a temperature of 23.8 °F, which is cooler than the historical average.
In general, the average temperature in Grants Pass at the beginning of September is 32.9 °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, Grants Pass experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
More
27
Dry days
3
Rainy days
0
Snow days
28°/11°
Temperatures
11 km/h
Avg max wind
56 %
Avg humidity
Grants Pass Weather September
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Temperatures trend during September in Grants Pass
See the weather trend as well as the moving average line
September weather in Grants Pass day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Cloudy | 32° /13° | 0 mm | 7 | |
| Sept. 2 |  Sunny | 32° /12° | 0 mm | 8 | |
| Sept. 3 |  Partly cloudy | 33° /12° | 0 mm | 9 | |
| Sept. 4 | Sunny | 35° /16° | 0 mm | 8 | |
| Sept. 5 | Sunny | 35° /17° | 0 mm | 8 | |
| Sept. 6 | Cloudy | 34° /17° | 0 mm | 8 | |
| Sept. 7 |  Overcast | 29° /14° | 0 mm | 6 | |
| Sept. 8 | Sunny | 27° /14° | 4.3 mm | 7 | |
| Sept. 9 | Sunny | 27° /12° | 0 mm | 7 | |
| Sept. 10 | Sunny | 24° /12° | 0 mm | 6 | |
| Sept. 11 |  Moderate rain at times | 18° /9° | 1.6 mm | 4 | |
| Sept. 12 | Overcast | 24° /8° | 0 mm | 6 | |
| Sept. 13 | Overcast | 28° /10° | 0 mm | 7 | |
| Sept. 14 | Partly cloudy | 24° /9° | 2.7 mm | 6 | |
| Sept. 15 | Overcast | 23° /9° | 0 mm | 6 | |
| Sept. 16 | Overcast | 28° /10° | 0 mm | 7 | |
| Sept. 17 | Sunny | 31° /10° | 0 mm | 1.5 | |
| Sept. 18 | Overcast | 19° /11° | 0 mm | 1.4 | |
| Sept. 19 | Sunny | 30° /8° | 0 mm | 1.4 | |
| Sept. 20 | Sunny | 31° /8° | 0 mm | 1.4 | |
| Sept. 21 | Sunny | 29° /7° | 0 mm | 0 | |
| Sept. 22 | Sunny | 31° /10° | 0 mm | 5 | |
| Sept. 23 |  Patchy rain possible | 19° /8° | 0.4 mm | 3 | |
| Sept. 24 | Patchy rain possible | 21° /5° | 3.3 mm | 3 | |
| Sept. 25 | Patchy rain possible | 12° /4° | 4.5 mm | 2 | |
| Sept. 26 |  Moderate rain | 13° /5° | 6.6 mm | 2 | |
| Sept. 27 | Patchy rain possible | 18° /4° | 0.5 mm | 3 | |
| Sept. 28 | Sunny | 24° /3° | 0 mm | 4 | |
| Sept. 29 | Sunny | 27° /5° | 0 mm | 4 | |
| Sept. 30 | Sunny | 28° /6° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Grants Pass 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 Grants Pass forecast closer to your planned date for the most up-to-date weather information.
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Grants Pass in September - FAQ
What are the expected maximum and minimum temperatures in Grants Pass during September?
Enjoy moderate daytime temperatures of up to 28° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Grants Pass during September?
Expect minimal rainfall in Grants Pass during September, with a total of 11.8 mm over approximately 3 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Grants Pass during September?
The average wind speed in Grants Pass during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Grants Pass
Explore the daily rainfall trends and prepare for Grants Passs September weather 💧
UV exposure in Grants Pass during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Grants Pass?Get accurate weather forecasts for Grants Pass, located at latitude 42.439 and longitude -123.331. Stay updated with localized weather information tailored for Grants Pass.
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