Climate in Portland, United States

Portland, United States has a oceanic climate. The annual average temperature is about 14.1°C, with around 872 hours of sunshine; the national rainfall baseline is roughly 1001 mm across 167 rainy days a year. The warmest month is Jul (highs near 22.6°C) and the coldest is Jan (lows near 5.6°C). These are deterministic planning estimates, not a forecast or measured station data. Temperature and sunshine follow the city's latitude; rainfall and the climate zone come from a country-level baseline that every city in the country shares (refined by region in the United States, Canada and Australia), so they do not show local differences. Check current conditions with an official meteorological service before travel.

Data year 2025; last updated 2026-05-16.

Portland is classified as Oceanic. The classification combines the city’s own temperature range, which follows its latitude, with a rainfall pattern taken at country level for United States — so cities in the same country usually share a zone.

The rainfall baseline for United States is about 1001 mm a year over roughly 167 rainy days, with the wettest month Dec and the driest Jun. This figure is not specific to Portland: every city in United States carries the same baseline, so it will not show the difference between, say, a dry inland city and a wet coastal one. Use an official meteorological service for local rainfall.

Portland sees an estimated 872 hours of sunshine a year, concentrated in the warmer months around Jul.

By temperature and rainfall, the most comfortable months in Portland are Jul, Jun, May. Conditions vary year to year — verify with a current forecast before booking.

Portland has a climate comfort score of 69/100, a comfortable year-round climate by this measure. The score weights mild temperatures most, then rainfall balance, sunshine, low seasonality, and the absence of extreme winter cold or summer heat.

• Climate in Seattle — Oceanic, comfort 69/100
• Climate in San Francisco — Mediterranean, comfort 96/100
• Climate in Vancouver — Oceanic, comfort 64/100