Mercer Island Weather in March

With daytime temperatures of 12°C (54°F) and nighttime lows of 4°C (39°F), March in Mercer Island brings low temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 126 mm (5 in) falls on average.

Rainfall in Mercer Island in March

Past climate data indicates that roughly 21 days will see rain, totalling around 126 mm (5 in) for the month. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Mercer Island in March

Temperatures in Mercer Island in March top out at 12°C (54°F) and drop to 4°C (39°F) overnight. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. With lows around 4°C (39°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Mercer Island in March

The month experiences a moderate amount of sunlight, with 179 hours of sunshine. This provides a nice balance between sunshine and clouds.

Wind Speed in Mercer Island in March

Wind speeds average 5 m/s (10 knots) during March. At this speed, gentle to moderate breezes make small trees sway and the wind creates whitecaps on water bodies. Daily variations range from moderate winds to stronger breezes, creating excellent conditions for sailing, kite flying and wind sports.

March in Mercer Island can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.