Historical weather data, all-time temperature records, and monthly climate averages for Maple Valley, WA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Maple Valley runs mild and damp — expect a high near 56° with a 62% chance of rain. The date has seen some wild swings over 117 years of records, from a balmy 76° back in 1952 down to a bitter 25° in 1936.
Maple Valley has earned its weather extremes over more than a century of data. The thermometer has swung from a scorching 112° on June 28, 2021 — a product of the Pacific Northwest's historic heat dome — all the way down to 0° on February 5, 1989, with a single-day rainfall of 5.5" and 14" of snow rounding out the all-time books.
Summer is the clear window for visitors, with late July averaging highs of 78° and dry conditions making it the most reliable stretch of the year. By contrast, early January tops out around 43°, and late November is the wettest week of the year, averaging over 2 inches of rain in just seven days. Plan outdoor trips between June and September — the rest of the year leans wet and cool.