Historical weather data, all-time temperature records, and monthly climate averages for Hyannis, MA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Hyannis sits right at the edge of spring, with 123 years of data pointing to a typical high of 50° and a low of 34°. The date has seen wild swings — a balmy 71° back in 1977, and a bitter 16° in 1954. There's about a 1-in-3 chance of rain today, but snow is off the table.
Hyannis has been pushed to both extremes over its 133-year weather record — from a scorching 100° in August 1948 to a brutal -12° in February 1934. The Cape saw nearly two feet of snow in a single day in January 2005, and a September storm in 2010 dumped over 6 inches of rain. It's a location that earns its full range of New England weather.
Summer is the sweet spot here — the week of July 16th averages a high of 80°, making it prime Cape Cod season. Winters are cold but not brutal by New England standards, with late January highs hovering around 37°. Early April is actually the wettest stretch of the year, averaging 1.1 inches for the week, so pack accordingly if you're visiting for spring break.