Climate change in Armstrong County, Pennsylvania
Since 1979, Armstrong County, Pennsylvania has warmed 2.5°F, with 2 more days above 90°F, about the same number of nights above 70°F and 18% more precipitation a year. Its climate in 1996–2025 is most like Hunterdon County, NJ's was in 1951–1980.
- Average temperature: +2.5°F
- Summer highs (Jun–Aug): +1.4°F
- Winter lows (Dec–Feb): +3.6°F
- Precipitation: +18%
- Wettest day of the year: +39%
- Longest dry spell: −1 days
- Days above 90°F: +2 days
- Nights above 70°F: +0 days
- Freezing nights: −9 days
- Frost-free season: +15 days
- Muggy days: +6 days
- Summer heat index (Jun–Aug): +1.9°F
- Extreme fire-weather days: +13 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.