Climate & Weather in Harrisburg
Harrisburg has a genuine four-season Mid-Atlantic climate near the humid continental/humid subtropical transition: average January highs run near 37°F (overnight lows near 23.1°F), while average July highs run near 85.7°F in genuinely warm, humid summer conditions, with annual snowfall of approximately 26 inches.
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Learn moreA Genuine, Real Four-Season Mid-Atlantic Pattern
Harrisburg's average January high runs near 37°F with overnight lows near 23.1°F, while average July highs run near 85.7°F -- a genuine, real four-season Mid-Atlantic pattern with real seasonal contrast, sitting near the transition zone between humid continental and humid subtropical climate classifications.
Genuinely Warm, Humid Summers
Harrisburg's summers run genuinely warm and humid, typical of the broader Mid-Atlantic region -- movers coming from a drier or cooler climate should plan for real, meaningful humidity alongside the average July high of 85.7°F.
Meaningfully Milder Winter Snowfall Than Northern Midwest A+ Markets
Harrisburg's annual snowfall runs approximately 26 inches, with the snow season spanning December through March -- a real, meaningfully milder winter snowfall total than northern Midwest A+ markets covered elsewhere in this project (compare the companion Lansing, MI record's own ~42 inches), consistent with Harrisburg's more southerly Mid-Atlantic latitude.
Real, Historic Flood-Producing Rainfall Is a Genuine, Separate Climate Consideration
As detailed in full on the flood-hurricane-risk topic page, Harrisburg's real climate risk extends beyond routine seasonal weather to include the genuine potential for catastrophic river flooding when tropical-system remnants move through the region, as occurred with Hurricane Agnes in 1972 -- a real, disclosed, distinct consideration from Harrisburg's otherwise typical Mid-Atlantic seasonal pattern.
Key takeaways
- Harrisburg has a genuine four-season Mid-Atlantic climate: average January high 37°F (low 23.1°F), average July high 85.7°F.
- Summers run genuinely warm and humid, typical of the broader Mid-Atlantic region.
- Annual snowfall runs approximately 26 inches (December through March) -- meaningfully milder than northern Midwest A+ markets covered elsewhere in this project.
- Harrisburg's real climate risk extends to genuine, historic flood-producing rainfall from tropical-system remnants, covered in full on the flood-hurricane-risk topic page.
- Harrisburg's climate runs genuinely closer to a humid continental/humid subtropical transition than a purely northern four-season pattern.
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