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 29 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.6 °F by the end of September.
The climate of Astoria in September is notably wet, with an average of 15 rainy days.
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15
Dry days
15
Rainy days
0
Snow days
25°/17°
Temperatures
19 km/h
Avg max wind
69 %
Avg humidity
Astoria in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2  28° | 3 29° | 4 30° | 5 30° | 6 30° | 7 29° |
| 8  26° | 9  28° | 10 28° | 11 27° | 12  27° | 13  26° | 14  27° |
| 15 24° | 16 25° | 17  23° | 18 21° | 19 23° | 20 23° | 21 24° |
| 22 23° | 23  19° | 24 19° | 25  18° | 26 22° | 27 21° | 28 21° |
| 29 17° | 30 19° |
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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 | Sunny | 27° /18° | 2.4 mm | 7 | |
| Sept. 2 | Partly cloudy | 28° /17° | 0 mm | 7 | |
| Sept. 3 | Partly cloudy | 29° /17° | 0 mm | 7 | |
| Sept. 4 | Partly cloudy | 30° /21° | 0 mm | 8 | |
| Sept. 5 | Partly cloudy | 30° /21° | 0.1 mm | 8 | |
| Sept. 6 | Partly cloudy | 30° /22° | 0 mm | 7 | |
| Sept. 7 | Sunny | 29° /20° | 3.7 mm | 7 | |
| Sept. 8 | Light rain shower | 26° /17° | 1 mm | 7 | |
| Sept. 9 | Thundery outbreaks possible | 28° /19° | 2.1 mm | 7 | |
| Sept. 10 | Light rain shower | 28° /20° | 2.3 mm | 7 | |
| Sept. 11 | Light rain shower | 27° /19° | 1.8 mm | 7 | |
| Sept. 12 | Cloudy | 27° /19° | 0 mm | 7 | |
| Sept. 13 | Moderate or heavy rain shower | 26° /18° | 13.9 mm | 7 | |
| Sept. 14 | Overcast | 27° /18° | 0.6 mm | 7 | |
| Sept. 15 | Overcast | 24° /16° | 0 mm | 6 | |
| Sept. 16 | Overcast | 25° /16° | 0 mm | 6 | |
| Sept. 17 | Light drizzle | 23° /15° | 0.4 mm | 6 | |
| Sept. 18 | Light rain shower | 21° /17° | 14.1 mm | 5 | |
| Sept. 19 | Partly cloudy | 23° /16° | 3.9 mm | 6 | |
| Sept. 20 | Sunny | 23° /15° | 2.2 mm | 6 | |
| Sept. 21 | Sunny | 24° /15° | 0 mm | 6 | |
| Sept. 22 | Patchy rain possible | 23° /14° | 0 mm | 6 | |
| Sept. 23 | Heavy rain | 19° /14° | 25 mm | 5 | |
| Sept. 24 | Light rain | 19° /14° | 2.2 mm | 5 | |
| Sept. 25 | Moderate rain | 18° /15° | 36.5 mm | 4 | |
| Sept. 26 | Patchy rain possible | 22° /15° | 25.1 mm | 5 | |
| Sept. 27 | Cloudy | 21° /14° | 8.7 mm | 5 | |
| Sept. 28 | Overcast | 21° /15° | 0 mm | 5 | |
| Sept. 29 | Moderate or heavy rain shower | 17° /15° | 25.5 mm | 4 | |
| Sept. 30 | Light drizzle | 19° /14° | 7.7 mm | 4 | |
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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?
During September, expect a variety of temperatures with highs around 25° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Astoria during September?
Significant rainfall exceeding 240.5 mm is expected in Astoria during September, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Astoria during September?
The average wind speed in Astoria during September is 19 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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