Historical weather data, all-time temperature records, and monthly climate averages for Waltham, MA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Waltham sits right on the edge of spring's promise — average highs of 53° with lows still dipping to freezing. The date has seen a 54-degree swing in extremes, from a bitter 19° in 2016 to a shirt-sleeve 73° back in 2010. There's a 35% chance of rain, but snow is essentially off the table.
Waltham's weather has a serious range — 102° in July 2006 and -20° in January 1957 means residents have experienced a jaw-dropping 122 degrees of thermal extremes. The wettest single day on record dumped 8.48 inches during a September 1954 storm, and a December 1960 snowstorm buried the area under nearly 20 inches in a single day.
Summer is the sweet spot here, with highs peaking around 84° in late July before a long, gradual cool-down through fall. January is the coldest stretch, with average highs barely cracking 34°. December is surprisingly the wettest time of year, averaging over an inch of precipitation in a single week.