Middlesex County Climate
Middlesex County, Massachusetts
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
49.7°F
Annual Precip
47.8"
Annual Snowfall
56.1"
Extreme Heat Days
15
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
2,779
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Middlesex County
Climate Verdict
Middlesex County has a cool, averaging 49.7°F annually, moderately wet with 47.8 inches of annual precipitation, rare extreme heat with only 14.75 days above 90°F annually, moderate snowfall of 56.1 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 26.6°F. summers are warm — July averages 72.9°F. The 46°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Middlesex County closely matches the Massachusetts statewide average temperature of 49.5°F.
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
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Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.