Portland
September
Weather in Portland for September 2024
Your guide to Portland weather in September - trends and predictions
Until now, September 2024 in Portland has been nearly identical to the historical average, with a temperature of 26.8 °F (showing only a slight deviation of 0.1 °F).
The forecast for the next days in Portland predicts a temperature of 20.1 °F, which is cooler than the historical average.
In general, the average temperature in Portland at the beginning of September is 27.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.6 °F by the end of September.
Portland sees moderate rainfall in September, averaging 10 rainy days.
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20
Dry days
10
Rainy days
0
Snow days
24°/12°
Temperatures
11 km/h
Avg max wind
63 %
Avg humidity
Portland in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  30° | ||||||
| 2  27° | 3  25° | 4  25° | 5 30° | 6  30° | 7 28° | 8 29° |
| 9 28° | 10  27° | 11 21° | 12 23° | 13 23° | 14 27° | 15 34° |
| 16 24° | 17 15° | 18 20° | 19 22° | 20 22° | 21 23° | 22 24° |
| 23 29° | 24 19° | 25 19° | 26 20° | 27 18° | 28  11° | 29 16° |
| 30 20° |
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Temperatures trend during September in Portland
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 | Fog | 30° /16° | 0.2 mm | 7 | |
| Sept. 2 | Cloudy | 27° /15° | 0.1 mm | 6 | |
| Sept. 3 | Patchy rain possible | 25° /15° | 1.2 mm | 6 | |
| Sept. 4 | Overcast | 25° /12° | 1.1 mm | 6 | |
| Sept. 5 | Overcast | 30° /13° | 0 mm | 7 | |
| Sept. 6 | Partly cloudy | 30° /15° | 0 mm | 8 | |
| Sept. 7 | Cloudy | 28° /15° | 0 mm | 6 | |
| Sept. 8 | Overcast | 29° /14° | 0 mm | 7 | |
| Sept. 9 | Cloudy | 28° /12° | 0 mm | 7 | |
| Sept. 10 | Sunny | 27° /13° | 0 mm | 7 | |
| Sept. 11 | Overcast | 21° /13° | 5.5 mm | 5 | |
| Sept. 12 | Cloudy | 23° /12° | 0.3 mm | 6 | |
| Sept. 13 | Overcast | 23° /11° | 0 mm | 6 | |
| Sept. 14 | Sunny | 27° /11° | 0.1 mm | 7 | |
| Sept. 15 | Sunny | 34° /13° | 0 mm | 8 | |
| Sept. 16 | Sunny | 24° /12° | 0 mm | 4 | |
| Sept. 17 | Overcast | 15° /11° | 0 mm | 1 | |
| Sept. 18 | Cloudy | 20° /15° | 0 mm | 4 | |
| Sept. 19 | Patchy rain possible | 22° /13° | 0.1 mm | 3 | |
| Sept. 20 | Partly cloudy | 22° /11° | 0 mm | 4 | |
| Sept. 21 | Sunny | 23° /10° | 0 mm | 5 | |
| Sept. 22 | Overcast | 24° /15° | 0 mm | 4 | |
| Sept. 23 | Sunny | 29° /13° | 0 mm | 5 | |
| Sept. 24 | Patchy rain possible | 19° /15° | 1.2 mm | 4 | |
| Sept. 25 | Patchy rain possible | 19° /11° | 0.2 mm | 3 | |
| Sept. 26 | Partly cloudy | 20° /12° | 0 mm | 5 | |
| Sept. 27 | Patchy rain possible | 18° /12° | 3.2 mm | 3 | |
| Sept. 28 | Moderate rain | 11° /10° | 9.2 mm | 3 | |
| Sept. 29 | Patchy rain possible | 16° /12° | 3.3 mm | 3 | |
| Sept. 30 | Partly cloudy | 20° /7° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Portland 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 Portland forecast closer to your planned date for the most up-to-date weather information.
Portland in September - FAQ
What are the expected maximum and minimum temperatures in Portland during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Portland during September?
In September, Portland can expect light to moderate rainfall, totaling 50 mm across approximately 10 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Portland during September?
The average wind speed in Portland during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
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