Weather in Portland, Oregon, United States in May
In an average May, Portland sees a daily high around 63°F and a low around 44°F, based on 1981–2026 of local climate records.
| Average high | 63°F |
|---|---|
| Typical high range | 54°F to 75°F |
| Average low | 44°F |
| Typical low range | 38°F to 50°F |
| Average daily precipitation | 0.10 in |
May records
The most extreme May on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total May accumulation.
High
Highest
93°F
2005-05-27
Lowest
45°F
1986-05-10
Low
Highest
64°F
1986-05-31
Lowest
31°F
1985-05-11
Feels-like
Highest
112°F
2005-05-27
Lowest
25°F
1985-05-11
Humidity
Highest
17.1 g/m³
1986-05-31
Lowest
5.3 g/m³
1985-05-11
Wind
Highest
18 mph
2010-05-19
Lowest
3 mph
2015-05-20
Precip
Wettest
7.25 in
2022
Driest
0.47 in
1992
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