Portland, USA

Portland sits under maritime skies in USA, and the 2015–2024 weather record gives its sunshine a clear shape: the July peak reaches a 100/100 sun score, with daytime highs around 29°C — a solid base for an urban escape.

Across a typical year, afternoon temperatures swing between 8°C (December) and 29°C (August). On the rain ledger, July is the safest bet at a 6% chance of a wet day, while December climbs to 61%. Beach-warm afternoons (24°C and up) hold through July–August.

The seasonal arc is clear in the data: summer averages 27°C against winter's 8°C, while rain-day odds move from 59% in winter and 47% in spring to 14% in summer and 42% through autumn. In short: plan around summer if you can, keep spring as the fallback, and go into winter with managed expectations (its season score is 37).

Best months to visit Portland

The best month on record is July — a 100/100 sun score, built on 29% cloud cover and 6% rain-day odds — followed by August and June. In practice you have flexibility — May–September all stay above a 70 sun score. At the other end, December scores just 34, the weakest month of the year.

For context: in July, Portland is drier than 79% of the ocean destinations we track.

Month-by-month breakdown for Portland → · More destinations for July →

Right now the 16-day outlook shows none mostly-clear days (under 40% cloud) and 2 with real rain risk, with temperatures between 3°C and 17°C — which is how Portland earns its current 59/100 sun score.