In terms of precipitation, rainfall in Friday Harbor ranges from 20.0 - 107.0 mm per month. January is typically the wettest month, when rainfall can reach 107.0 mm. July is typically the driest time to visit Friday Harbor when rainfall is around 20.0 mm.
If weather is an important factor for your trip to Friday Harbor, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 4.0 C).
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