Seattle, USA

Seattle sits under maritime skies in USA, and the 2015–2024 weather record gives its sunshine a clear shape: the July peak reaches a 99/100 sun score, with daytime highs around 25°C — a solid base for a city break.

July is the heat peak, averaging 25°C highs; December is the cool end, when nights dip to around 2°C. On the rain ledger, July is the safest bet at a 9% chance of a wet day, while December climbs to 59%. If 24°C is your bar for proper warmth, count on July–August.

The seasonal arc is clear in the data: summer averages 23°C against winter's 8°C, while rain-day odds move from 56% in winter and 43% in spring to 18% in summer and 46% through autumn. That makes summer the statistical sweet spot (season score 97), with spring a workable second; winter is where the odds thin out.

Best months to visit Seattle

The best month on record is July — a 99/100 sun score, built on 37% cloud cover and 9% rain-day odds — followed by August and June. In practice you have flexibility — May–September all stay above a 70 sun score. The month to avoid on pure weather odds is December (35/100).

For context: in July, Seattle is drier than 73% of the ocean destinations we track.

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

Right now the 16-day outlook shows none mostly-clear days (under 40% cloud) and 3 with real rain risk, with temperatures between 4°C and 18°C — which is how Seattle earns its current 54/100 sun score.