Climate & Weather in Rock Hill
Rock Hill has a genuine four-season, Cfa humid subtropical Piedmont climate -- real summer heat and humidity, real winter cold snaps, and a spring severe-weather season -- distinct from both the coastal Grand Strand's climate and the mountain-adjacent climates covered elsewhere in this project.
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Learn moreA genuine four-season Piedmont climate
Rock Hill carries a Koppen Cfa classification (humid subtropical, no dry season), with July and August the hottest months (average highs 88.9F-91.2F) and January/December the coldest (average lows 34.2F-39F). Humidity stays consistently moderate-to-high (70%-75%) year-round -- real, if less extreme, humidity than the coastal Grand Strand markets built elsewhere in this wave.
May and June are the wettest months
Rock Hill sees fairly consistent rainfall through the year, with May and June the wettest months -- a real, if unremarkable, seasonal pattern typical of the broader Piedmont region.
Spring severe-weather season is the most distinctive seasonal risk
As detailed on insurance-hazard-costs, Rock Hill's most distinctive weather risk is the Piedmont's spring severe-thunderstorm and (mostly EF0-EF2) tornado season -- a real, current pattern shared with the neighboring North Carolina Piedmont, not a hurricane-season concern.
Key takeaways
- Rock Hill has a genuine Cfa humid subtropical climate: July/August highs averaging 88.9F-91.2F, January/December lows averaging 34.2F-39F, consistent 70%-75% humidity.
- May and June are the wettest months in an otherwise fairly consistent year-round rainfall pattern.
- Spring severe-thunderstorm and tornado season (mostly EF0-EF2) is Rock Hill's most distinctive weather risk -- not a hurricane-season concern given the city's inland location.
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