Astoria (OR)
September
Weather in Astoria, Oregon for September 2026
Your guide to Astoria weather in September - trends and predictions
So far, September 2026 in Astoria is slightly warmer than the historical average by 0.5 °F.
The forecast for the next days in Astoria predicts temperatures to be around 18 °F, close to the historical average.
In general, the average temperature in Astoria at the beginning of September is 18.1 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 18 °F by the end of September.
Astoria experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 75.1 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
21
Dry days
9
Rainy days
0
Snow days
16°/12°
Temperatures
14 km/h
Avg max wind
89 %
Avg humidity
Astoria Weather September
Move between months or click on a day
Temperatures trend during September in Astoria
See the weather trend as well as the moving average line
September weather in Astoria day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Cloudy | 17° /13° | 1.7 mm | 3 | |
| Sept. 2 |  Patchy rain possible | 17° /12° | 23.4 mm | 3 | |
| Sept. 3 | Patchy rain possible | 17° /11° | 87.1 mm | 3 | |
| Sept. 4 |  Sunny | 20° /11° | 0 mm | 5 | |
| Sept. 5 | Sunny | 19° /13° | 0.2 mm | 5 | |
| Sept. 6 | Sunny | 19° /13° | 0 mm | 5 | |
| Sept. 7 |  Mist | 18° /13° | 3.3 mm | 4 | |
| Sept. 8 | Patchy rain possible | 19° /11° | 0 mm | 5 | |
| Sept. 9 | Patchy rain possible | 18° /11° | 0.1 mm | 4 | |
| Sept. 10 |  Overcast | 15° /11° | 0.3 mm | 3 | |
| Sept. 11 | Light rain shower | 16° /11° | 5.9 mm | 3 | |
| Sept. 12 | Light rain shower | 15° /11° | 6.1 mm | 3 | |
| Sept. 13 | Patchy rain possible | 15° /11° | 0.4 mm | 3 | |
| Sept. 14 | Patchy rain possible | 16° /11° | 1.7 mm | 3 | |
| Sept. 15 | Cloudy | 17° /11° | 0.7 mm | 3 | |
| Sept. 16 | Sunny | 21° /11° | 0 mm | 5 | |
| Sept. 17 | Sunny | 19° /13° | 0 mm | 4.8 | |
| Sept. 18 | Sunny | 16° /12° | 0.1 mm | 4.6 | |
| Sept. 19 |  Partly cloudy | 18° /11° | 0 mm | 4.6 | |
| Sept. 20 | Sunny | 18° /11° | 0 mm | 4.8 | |
| Sept. 21 | Sunny | 16° /11° | 0.3 mm | 5 | |
| Sept. 22 | Sunny | 17° /11° | 0 mm | 5 | |
| Sept. 23 | Overcast | 23° /11° | 0 mm | 6 | |
| Sept. 24 | Sunny | 24° /14° | 0 mm | 6 | |
| Sept. 25 | Sunny | 17° /14° | 0 mm | 5 | |
| Sept. 26 | Patchy rain possible | 15° /11° | 0.5 mm | 4 | |
| Sept. 27 | Patchy rain possible | 15° /9° | 0.8 mm | 4 | |
| Sept. 28 | Sunny | 18° /7° | 0 mm | 5 | |
| Sept. 29 | Sunny | 19° /8° | 0 mm | 5 | |
| Sept. 30 | Overcast | 18° /10° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Astoria 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 Astoria forecast closer to your planned date for the most up-to-date weather information.
Change Month
Astoria in September - FAQ
What are the expected maximum and minimum temperatures in Astoria during September?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Astoria during September?
Moderate rainfall is anticipated in Astoria during September, with a total of 75.1 mm spread over approximately 9 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Astoria during September?
The average wind speed in Astoria during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Astoria
Explore the daily rainfall trends and prepare for Astorias September weather 💧
Typically, Astoria has 9 rainy days in September with a total of 75.1 mm of rainfall.
UV exposure in Astoria during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
More Astoria weather pages
You are here
Where is Astoria?Get accurate weather forecasts for Astoria, located at latitude 46.188 and longitude -123.831. Stay updated with localized weather information tailored for Astoria.
Found a mistake?
We appreciate your attention to details. Tell us here.