Climate change in Suffolk County, Massachusetts
Since 1979, Suffolk County, Massachusetts has warmed 3.6°F, with 8 more days above 90°F, 8 more nights above 70°F and 6% more precipitation a year. Its climate in 1996–2025 is most like Bergen County, NJ's was in 1951–1980.
- Average temperature: +3.6°F
- Summer highs (Jun–Aug): +3.3°F
- Winter lows (Dec–Feb): +4.7°F
- Precipitation: +6%
- Wettest day of the year: +3%
- Longest dry spell: −2 days
- Days above 90°F: +8 days
- Nights above 70°F: +8 days
- Freezing nights: −18 days
- Frost-free season: +27 days
- Muggy days: +10 days
- Summer heat index (Jun–Aug): +4.5°F
- Extreme fire-weather days: +14 days
- Snowfall: +18%
- Snowy days (1 inch or more): −2 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.