Historical weather data, all-time temperature records, and monthly climate averages for Lake Forest Park, WA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Lake Forest Park lands right in the middle of classic Pacific Northwest spring — expect a high around 57° with a coin-flip chance of rain. The date has swung wildly over 38 years of records, from a balmy 74° in 2007 to a chilly 33° low in 2021, so layers are your friend.
Lake Forest Park has seen it all: a scorching 107° during the historic Pacific Northwest heat dome in June 2021, and a bone-chilling 10° back in December 1990 — a 97-degree spread between the extremes. Winter storms pack the real punch here, with a single day dumping 4.15 inches of rain in December 2007 and 8 inches of snow falling in one shot that same brutal winter of 1990.
Summer is the sweet spot — highs peak around 77-79° from late July through early August, with dry, comfortable conditions that make the region shine. If you're avoiding rain, steer clear of mid-to-late November, the wettest stretch of the year at nearly 1.6 inches per week on average. Winter settles in cool and grey, with December highs barely cracking 47°.