Portland in May
7.9out of 10
Yes, a good time to go
Warm and comfortable: highs around 29°C. Frequent rain: about 9 rainy days.
29°CAvg high
23°CAvg low
9Rainy days (68 mm)
13:23 hDaylight
06:44Sunrise · 20:07 Sunset
Why this score
- Warm and comfortable: highs around 29°C
- Frequent rain: about 9 rainy days
- Rain varies a lot between years (±4.8 days)
What to wear and pack
- T-shirts and light layers
- Shorts or a light skirt
- Rain jacket or compact umbrella
- Sunscreen, sunglasses and a hat
How reliable is the forecast?
Rain in May varies a lot between years (±4.8 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 19°C | 11°C | 54 mm | 7 | – | – | 7.7 |
| February | 20°C | 13°C | 38 mm | 5 | – | – | 8.1 |
| March | 23°C | 16°C | 57 mm | 6 | – | – | 8.3 |
| April | 26°C | 19°C | 50 mm | 6 | – | – | 8.3 |
| May | 29°C | 23°C | 68 mm | 9 | – | – | 7.9 |
| June | 31°C | 25°C | 75 mm | 10 | – | – | 7.2 |
| July | 32°C | 26°C | 57 mm | 9 | – | – | 7.2 |
| August | 32°C | 26°C | 57 mm | 10 | – | – | 6.9 |
| September | 31°C | 24°C | 108 mm | 14 | – | – | 6.7 |
| October | 28°C | 20°C | 86 mm | 9 | – | – | 7.9 |
| November | 23°C | 15°C | 56 mm | 7 | – | – | 8.1 |
| December | 20°C | 12°C | 53 mm | 7 | – | – | 7.9 |
Frequently asked questions
How hot is Portland in May?
Daytime highs average 29°C and nights about 23°C.
When is the best time to visit Portland?
The best months are March, April, February, November.