Historical weather data, all-time temperature records, and monthly climate averages for Westbrook, ME. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Westbrook sits right in that awkward shoulder season — historically, highs average just 48° with lows still dipping to freezing. The date has a wild range in the record books, from a balmy 76° in 2010 to a brutal 8° back in 1954, so don't put the layers away just yet. There's nearly a coin-flip chance of precipitation today, with a small but real 7% shot at snow.
Westbrook's weather history is not for the faint of heart — the thermometer has swung from a scorching 103° in August 1975 all the way down to -39° in February 1943, a jaw-dropping 142-degree range. The wettest single day on record dropped 11.74 inches of rain in October 1996, and a December storm in 1970 buried the area under 22.3 inches of snow in one shot.
Summer is the clear sweet spot, with the warmest week of the year (July 16–22) averaging a comfortable 80° high before things cool off quickly through fall. Winters are genuinely cold — January and February highs barely crack the low 30s, with January 15–21 averaging just 30°. If you're trying to dodge rain, skip late November through early December, which is historically Westbrook's wettest stretch of the year.