Climate change in Harrison County, Mississippi
Since 1979, Harrison County, Mississippi has warmed 2.4°F, with 10 more days above 90°F, 29 more nights above 70°F and 1% less precipitation a year. Its climate in 1996–2025 is most like Assumption Parish, LA's was in 1951–1980.
- Average temperature: +2.4°F
- Summer highs (Jun–Aug): +0.9°F
- Winter lows (Dec–Feb): +3.5°F
- Precipitation: −1%
- Wettest day of the year: +5%
- Longest dry spell: −1 days
- Days above 90°F: +10 days
- Nights above 70°F: +29 days
- Freezing nights: −11 days
- Frost-free season: +15 days
- Muggy days: +21 days
- Summer heat index (Jun–Aug): +2.4°F
- Extreme fire-weather days: +9 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.