Historical weather data, all-time temperature records, and monthly climate averages for Holliston, MA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Holliston lands right in that classic New England 'anything goes' stretch — the average high is 54° and low is 35°, but this date has swung from a balmy 73° back in 1991 to a brutal 17° in 1995. There's a coin-flip chance of rain (52%) and a 1-in-10 shot at snow, so don't put the layers away just yet.
Holliston's weather has real teeth at the extremes — the thermometer has hit 102° in July 2011 and plunged to -19° in January 1984, a 121-degree swing over the years. The area also saw 29.3 inches of snow in a single day during the legendary Blizzard of '78, and once picked up 7 inches of rain in one June day back in 1998.
Summer is the sweet spot: highs run into the low-to-mid 80s from mid-July through August, peaking during the week of July 16–22 at an average 85°. Winters are genuinely cold, with January and February highs stuck in the upper 30s to low 40s. If rain is your concern, late summer (early August) is statistically the wettest stretch of the year.