North & Central America · City travel
Best time to visit Portland
Mid Jun–Early Oct is the best time to visit. During this period, the average daytime high is 25.1°C, with 1.3 rainy days per 10 days.
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Season calendar
AvoidOff-seasonFairOkayGoodGreatBest
Japan MOFA travel advice
No Japan MOFA travel advisory is in effect for this destination.
Climate and season score by month
| Month | Level | Daytime high | Rainy days (per 10 days) | Cloud cover |
|---|---|---|---|---|
| January | Avoid | 8.2°C | 5.3 | 78.2% |
| February | Fair | 9.9°C | 4.7 | 75.9% |
| March | Okay | 12.8°C | 5.0 | 77.7% |
| April | Good | 16.0°C | 4.2 | 73.1% |
| May | Great | 19.9°C | 3.0 | 68.6% |
| June | Best | 23.0°C | 2.0 | 60.4% |
| July | Best | 27.1°C | 0.6 | 39.2% |
| August | Best | 27.3°C | 0.6 | 41.8% |
| September | Best | 23.8°C | 1.7 | 48.5% |
| October | Great | 17.3°C | 3.5 | 62.5% |
| November | Fair | 11.4°C | 5.2 | 76.6% |
| December | Avoid | 8.0°C | 5.5 | 80.1% |
Questions and answers
- When is the best time to visit Portland?
- Mid Jun–Early Oct. During this period, the average daytime high is 25.1°C, with 1.3 rainy days per 10 days.
- When should I avoid visiting Portland?
- Early Dec–Mid Jan is the least favorable time of year. Then, the average daytime high is 7.9°C, with 5.5 rainy days per 10 days.
- What is the rainiest time of year in Portland?
- January, November, December, with about 5.5 rainy days per 10 days at the peak.
How the score works
The season score is a relative 0–100 measure of how suitable each time of year is for travel at this destination, grouped into seven levels. It combines climate-normal trends in temperature, rain, cloud cover, and other conditions.
Weather station: PORTLAND KGW-TV（1 km）. Data: Copernicus ERA5, NASA POWER, NOAA GHCN-Daily, OISST, IBTrACS, and Natural Earth.
These are historical climate-normal trends, not a weather forecast.