Weather in Portland: September
 |
Average day temperature: | 72.9°F |
| Average night temperature: | 58.1°F | |
 |
Number of sunny days: | 16 days |
| Day length: | 11.7 - 13.3 hours | |
 |
Number of rainy days: | 3 days |
| Precipitation totals: | 1.5 in. | |
| more information | ||
14 days
forecast
forecast
| Portland |
weather in
October
October
| Portland |
Air temperature in September, °F
Show year:
2026
2025
2024
The highest day temperature during September of 2026 was 80°F. At the same time the lowest night temperature was 49°F. Daily and nightly averages during September were 67.8°F and 55.1°F.
Sunny, partly cloudy and cloudy days
Mostly all days in September are sunny but cloudy days are also possible.
Precipitation total in September, in.
Precipitation total value in Portland in September is 1.7 in. Other months of the year show relatively similar values.
Wind speed in September, mph
The average wind speed value in September is 3.9 mph It makes September lest windy month of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 7.8.
Best time for vacation in Portland
Portland on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Portland
Local time: 22:28
September 30, wednesday
0000
61°F
SW
2 mph
2 mph
0300
59°F
S
2 mph
2 mph
0600
57°F
SW
1 mph
1 mph
0900
61°F
S
2 mph
2 mph
1200
70°F
S
3 mph
3 mph
1500
73°F
SE
4 mph
4 mph
1800
70°F
S
6 mph
6 mph
2100
63°F
S
4 mph
4 mph
