Weather in Portland in May
In an average May, Portland sees a daily high around 68°F and a low around 47°F, based on 1980–2026 of local climate records.
| Average high | 68°F |
|---|---|
| Typical high range | 58°F to 82°F |
| Average low | 47°F |
| Typical low range | 41°F to 54°F |
| Average daily precipitation | 0.10 in |
May records
The most extreme May on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total May accumulation.
High
Highest
100°F
1983-05-28
Lowest
50°F
2013-05-22
Low
Highest
64°F
1983-05-29
Lowest
34°F
1985-05-11
Feels-like
Highest
122°F
1983-05-28
Lowest
26°F
1985-05-11
Humidity
Highest
15.4 g/m³
1986-05-26
Lowest
4.6 g/m³
2019-05-01
Wind
Highest
16 mph
1989-05-23
Lowest
2 mph
2008-05-24
Gust
Highest
45 mph
2010-05-20
Lowest
9 mph
2007-05-06
Precip
Wettest
5.86 in
2022
Driest
0.30 in
1992
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