Seattle weather by month & the best time to visit
United States · major city break · Mediterranean climate
The best time to visit Seattle is July — its sunniest month (Sunshine Score 86/100), with August close behind. Seattle averages about 1,898 hours of sunshine a year. Daytime highs around 22°C / 72°F and roughly 20 mm of rain in July.
When is the best time to visit Seattle?
For sunshine, the best time to visit Seattle is July, then August. The dullest month is January (0/100, 179 mm of rain). The full month-by-month picture is in the table below.
How sunny is Seattle?
Seattle gets a moderate 1,898 hours of sunshine a year. 86 Sunshine Score points separate July (86) from January (0), so the month you pick matters. It ranks #442 of 580 destinations in United States for annual sunshine, below the national median of 2,279 hours. Rain has a clear season: the wettest stretch, around December, carries about 44% of the annual 1,254 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 0 | 6° / 43°F | 1° / 34°F | 179 mm | 1 |
| February | 0 | 7° / 45°F | 1° / 34°F | 111 mm | 1 |
| March | 11 | 10° / 50°F | 3° / 37°F | 142 mm | 2 |
| April | 30 | 13° / 55°F | 5° / 41°F | 95 mm | 4 |
| May | 58 | 17° / 63°F | 8° / 46°F | 68 mm | 5 |
| June | 74 | 19° / 66°F | 10° / 50°F | 51 mm | 6 |
| July | 86 | 22° / 72°F | 13° / 55°F | 20 mm | 7 |
| August | 84 | 23° / 73°F | 13° / 55°F | 31 mm | 6 |
| September | 72 | 19° / 66°F | 10° / 50°F | 60 mm | 4 |
| October | 33 | 14° / 57°F | 7° / 45°F | 130 mm | 2 |
| November | 5 | 9° / 48°F | 3° / 37°F | 195 mm | 1 |
| December | 0 | 6° / 43°F | 1° / 34°F | 172 mm | 0 |
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Seattle: questions and answers
What kind of destination is Seattle?
Seattle is a major city break in United States with a Mediterranean climate.
How many hours of sunshine does Seattle get a year?
Seattle gets about 1,898 hours of sunshine a year, at its best around July.
When is the best time to visit Seattle?
The sunniest time to visit Seattle is July, when the Sunshine Score peaks at 86/100 (with August close behind). Expect daytime highs around 22°C / 72°F.
What is the least sunny month in Seattle?
January is the least sunny month in Seattle, scoring 0/100 with about 179 mm of rain.
How strong is the sun in Seattle?
The typical midday UV index in Seattle peaks around 7 (high) in July, easing to about 0 (low) in December. Month-by-month midday UV values are in the UV column of the table on this page.
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