Historical weather data, all-time temperature records, and monthly climate averages for Marlborough, MA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Marlborough typically lands in that awkward shoulder season — expect a high around 53° and a low near 34°, with nearly coin-flip odds (47%) of some rain. The date has swung wildly over the decades, from a frigid 15° in 1954 to a shirt-sleeve 77° back in 1950.
Marlborough's weather has real teeth at both ends of the thermometer — 102° in July 2010 and -20° in January 1957 represent a jaw-dropping 122-degree swing in the all-time record books. A single day in September 1954 dumped 8.48 inches of rain, and December 1960 buried the area under nearly 20 inches of snow in one storm.
Summer is the sweet spot here, with late July averaging a pleasant 84° high and comfortable conditions for outdoor plans. January and February are the ones to avoid if you're cold-averse, with highs scraping just 35–38°. Pack an umbrella for December visits — it's statistically the wettest week of the year, averaging over an inch of precipitation in mid-month alone.