Historical weather data, all-time temperature records, and monthly climate averages for Cambridgeport, MA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Cambridgeport sits right in that unpredictable shoulder season — average highs of 55° sound pleasant, but with a 46% chance of rain and an 8% shot at snow, the weather hasn't fully committed to spring yet. The range of outcomes on this date tells the whole story: it's hit 78° (2010) and bottomed out at 22° (1993), a 56-degree spread across the historical record.
Cambridgeport plays for keeps on both ends of the thermometer — 103° in June 2025 and -11° in February 2023 means residents have seen a 114-degree swing in just the past few years. The wettest single day on record dumped 7.15 inches in June 1998, and the Blizzard of '78 still holds the snow crown at 22 inches on February 7th.
Summer is the sweet spot here, with the warmest week of the year (July 16–22) averaging a high of 87° and a comfortable slide down through the 80s in August. Winter bottoms out mid-January with average highs of just 35°, so plan accordingly if you're visiting between December and February. August is statistically the wettest week of the year at 1.15 inches, but rain is spread fairly evenly — there's no true dry season to chase.