Weather in Portland in September
In an average September, Portland sees a daily high around 77°F and a low around 53°F, based on 1980–2026 of local climate records.
| Average high | 77°F |
|---|---|
| Typical high range | 66°F to 89°F |
| Average low | 53°F |
| Typical low range | 46°F to 59°F |
| Average daily precipitation | 0.10 in |
September records
The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
106°F
1988-09-02
Lowest
56°F
2019-09-29
Low
Highest
70°F
2022-09-10
Lowest
36°F
1984-09-24
Feels-like
Highest
124°F
1988-09-03
Lowest
29°F
1983-09-29
Humidity
Highest
16.6 g/m³
2010-09-27
Lowest
3.5 g/m³
1985-09-29
Wind
Highest
19 mph
2013-09-30
Lowest
2 mph
2011-09-21
Gust
Highest
59 mph
2013-09-28
Lowest
9 mph
2020-09-30
Precip
Wettest
6.42 in
2013
Driest
0.07 in
1993
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