Climate change in Grayson County, Texas
Since 1979, Grayson County, Texas has warmed 2.8°F, with 9 more days above 90°F, 20 more nights above 70°F and 3% less precipitation a year. Its climate in 1996–2025 is most like Rockwall County, TX's was in 1951–1980.
- Average temperature: +2.8°F
- Summer highs (Jun–Aug): +1.1°F
- Winter lows (Dec–Feb): +3.2°F
- Precipitation: −3%
- Wettest day of the year: −3%
- Longest dry spell: +4 days
- Days above 90°F: +9 days
- Nights above 70°F: +20 days
- Freezing nights: −10 days
- Frost-free season: +10 days
- Muggy days: +1 days
- Summer heat index (Jun–Aug): +1.0°F
- Extreme fire-weather days: +11 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.