San Juan Island Temperature Forecasts
life in the rainshadow: friday harbor, san juan island weather
winter weather
hey seattle, get out of the rain anytime of year! san juan island is located in a “rain shadow” cast by the spectacular mountains of the olympic peninsula and vancouver island. i could give you the technical descriptions, but the big deal is:
san juan island averages only 29 inches of rain per year, while nearby seattle is drenched in roughly 58.- unlike most of the pacific northwest, we see the sun an average of 247 day a year.
if you need a break from the gray drizzle, it’s just a short trip from the city to san juan island. drive up, or kenmore air can have you here in 30 minutes from downtown seattle.
summer weather
- visitors to san juan island can expect sunny summer days with average high temperatures rarely exceeding the mid-70s (24 C).
- summer evening temperatures are cooled by ocean breezes to an average low around 49 degrees (9 C). A/C is rare on the islands, as most people prefer an open window and a ceiling fan.
constant sunshine is something we’ve just had to learn to live with.
see for yourself
