Climate change in Worcester County, Massachusetts
Since 1979, Worcester County, Massachusetts has warmed 3.5°F, with 5 more days above 90°F, 2 more nights above 70°F and 3% more precipitation a year. Its climate in 1996–2025 is most like Norfolk County, MA's was in 1951–1980.
- Average temperature: +3.5°F
- Summer highs (Jun–Aug): +2.8°F
- Winter lows (Dec–Feb): +5.7°F
- Precipitation: +3%
- Wettest day of the year: +4%
- Longest dry spell: −2 days
- Days above 90°F: +5 days
- Nights above 70°F: +2 days
- Freezing nights: −19 days
- Frost-free season: +32 days
- Muggy days: +11 days
- Summer heat index (Jun–Aug): +3.7°F
- Extreme fire-weather days: +15 days
- Snowfall: +7%
- Snowy days (1 inch or more): +0 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.