Issaquah Weather in May

May in Issaquah sees daytime temperatures around 17°C (63°F) and lows of 7°C (45°F) at night. With around 99 mm (3.9 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Issaquah in May

Historically, approximately 16 days this month are expected to have rain, averaging 99 mm (3.9 in). The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Issaquah in May

May in Issaquah brings typical temperatures with highs around 17°C (63°F) and lows of 7°C (45°F). Conditions are often most pleasant around the middle of the day. Nights drop to 7°C (45°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Issaquah in May

With approximately 254 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

Wind Speed in Issaquah in May

In May, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.

For Issaquah itself, June, July, August and September generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.