Middlesex County Climate
Middlesex County, Massachusetts
Avg Annual Temp
49.7°F
Annual Precip
47.8"
Annual Snowfall
56.1"
Extreme Heat Days
14.75
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Middlesex County Weather
Middlesex County's Humid Continental Climate
Middlesex County maintains an average annual temperature of 49.7°F, placing it slightly below the national median. This humid continental climate is characterized by four distinct seasons and reliable precipitation throughout the year.
Matching the Massachusetts Average
The county's 49.7°F annual average is nearly identical to the Massachusetts state average of 49.5°F. It serves as a thermal middle ground for the state, avoiding the coastal extremes and the higher-elevation chills of the west.
Bridging the Coast and Central Hills
Middlesex is cooler than neighboring Suffolk County at 51.5°F but warmer than Worcester County to the west. Its 47.8 inches of annual precipitation closely mirrors the state average, keeping the landscape lush.
Warm Summers and Snowy Winters
July brings an average of 72.9°F with about 15 days of extreme heat reaching 90°F or higher. Conversely, winters are cold with a 29.1°F average and significant snowfall totaling 56.1 inches annually.
Preparing for Variable Weather
Residents should invest in heavy-duty snow removal equipment to manage the 56.1 inches of annual snowfall. High-efficiency HVAC systems are essential to handle both the 15 extreme heat days and the 26.6°F January lows.
Frequently Asked Questions
What is the average temperature in Middlesex County?
How much rain does Middlesex County get?
Does it snow in Middlesex County?
How hot does Middlesex County get in summer?
How cold are winters in Middlesex County?
Track your own weather in Middlesex County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.