Astoria
September
Weather in Astoria for September 2025
Your guide to Astoria weather in September - trends and predictions
In general, the average temperature in Astoria at the beginning of September is 20.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14.9 °F by the end of September.
Astoria experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 74.5 mm.
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Temperatures
Rain 🌧️
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20
Dry days
10
Rainy days
0
Snow days
17°/12°
Temperatures
14 km/h
Avg max wind
87 %
Avg humidity
Astoria Weather September
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  18° | 2  17° | 3 18° | 4  24° | 5 25° | 6 21° | |
| 7  19° | 8 18° | 9 17° | 10  16° | 11 16° | 12 16° | 13 16° |
| 14 17° | 15 16° | 16  17° | 17  15° | 18 14° | 19 13° | 20 13° |
| 21 17° | 22 14° | 23 16° | 24 18° | 25  14° | 26 14° | 27 14° |
| 28 13° | 29 14° | 30 17° |
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Temperatures trend during September in Astoria
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Cloudy | 18° /13° | 0 mm | 4 | |
| Sept. 2 | Patchy rain possible | 17° /14° | 0.5 mm | 4 | |
| Sept. 3 | Patchy rain possible | 18° /11° | 0.5 mm | 4 | |
| Sept. 4 | Sunny | 24° /11° | 0 mm | 6 | |
| Sept. 5 | Sunny | 25° /16° | 0 mm | 7 | |
| Sept. 6 | Sunny | 21° /14° | 0 mm | 6 | |
| Sept. 7 | Mist | 19° /14° | 0.2 mm | 4 | |
| Sept. 8 | Patchy rain possible | 18° /12° | 0.1 mm | 4 | |
| Sept. 9 | Patchy rain possible | 17° /11° | 0.2 mm | 4 | |
| Sept. 10 | Overcast | 16° /10° | 0.5 mm | 4 | |
| Sept. 11 | Light rain shower | 16° /11° | 17.4 mm | 4 | |
| Sept. 12 | Light rain shower | 16° /11° | 0.9 mm | 4 | |
| Sept. 13 | Patchy rain possible | 16° /11° | 0 mm | 4 | |
| Sept. 14 | Patchy rain possible | 17° /12° | 0.9 mm | 4 | |
| Sept. 15 | Cloudy | 16° /10° | 0 mm | 4 | |
| Sept. 16 | Partly cloudy | 17° /10° | 0 mm | 5 | |
| Sept. 17 | Moderate or heavy rain shower | 15° /13° | 32.8 mm | 4 | |
| Sept. 18 | Fog | 14° /13° | 0 mm | 3 | |
| Sept. 19 | Fog | 13° /12° | 0 mm | 3 | |
| Sept. 20 | Overcast | 13° /12° | 0 mm | 3 | |
| Sept. 21 | Mist | 17° /10° | 0 mm | 4 | |
| Sept. 22 | Fog | 14° /11° | 0 mm | 3 | |
| Sept. 23 | Fog | 16° /14° | 0 mm | 4 | |
| Sept. 24 | Mist | 18° /13° | 0 mm | 4 | |
| Sept. 25 | Heavy rain at times | 14° /12° | 5.2 mm | 3 | |
| Sept. 26 | Heavy rain at times | 14° /12° | 8.4 mm | 3 | |
| Sept. 27 | Fog | 14° /12° | 6.9 mm | 3 | |
| Sept. 28 | Overcast | 13° /11° | 0 mm | 3 | |
| Sept. 29 | Cloudy | 14° /11° | 0 mm | 3 | |
| Sept. 30 | Partly cloudy | 17° /10° | 0 mm | 5 | |
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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.
Astoria in September - FAQ
What are the expected maximum and minimum temperatures in Astoria during September?
Enjoy moderate daytime temperatures of up to 17° 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 74.5 mm spread over approximately 10 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 💧
UV exposure in Astoria during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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