Climate & Weather in Durham
Durham has a humid subtropical climate with genuine four-season variation -- a real difference from Sun Belt cities like Houston that have essentially no true winter. NOAA 1991-2020 normals for Raleigh-Durham International Airport (RDU) put January's average high at 52°F and average low at 32°F (mean 42°F), while July -- the hottest month -- runs with average highs commonly cited in the upper 80s to low 90s°F and lows around 70°F depending on the specific source consulted.
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Learn moreFour Real Seasons -- A Genuine Contrast to Sun Belt Metros
Unlike Houston or Tampa in this project, which see essentially no true cold season, Durham has real, felt seasonal variation: a cool, occasionally frosty winter (last spring freeze commonly cited around March 31, first fall freeze around November 4, based on Durham-area normals), a genuinely warm and humid summer, and distinct spring and fall shoulder seasons. Annual average temperature is cited around 59°F, with roughly 46.7 inches of precipitation a year spread across the calendar rather than concentrated in a single wet season.
Summer: Warm and Humid, Not Houston-Level Extreme
July, Durham's warmest month, shows real disagreement across sources on the exact figure -- Weather Spark cites average highs around 88°F, while other aggregators cite 89°F or as high as 93°F, with lows commonly cited around 70°F. This is genuinely warm and humid Piedmont summer weather, but it runs several degrees cooler on average than Houston's August highs (commonly in the low-to-mid 90s°F with a longer, more sustained hot season) -- a real, if moderate, climate advantage for anyone relocating from the Gulf Coast.
Winter: Mild But Genuinely Present
January's NOAA-normal average high of 52°F and average low of 32°F mean Durham winters hover right around freezing on cold mornings -- distinctly milder than a Northeast or Midwest winter, but a real winter nonetheless, unlike Houston's January mean in the low 50s°F with essentially no risk of a hard freeze most years. Occasional snow and, more consequentially, ice events (see the flood-hurricane-risk topic page for the December 2002 benchmark ice storm) are a genuine seasonal planning item for Durham residents in a way they simply aren't for most Gulf Coast metros.
Severe Weather Season, Not Hurricane Season
Durham's practical severe-weather calendar runs mainly spring (March-May) and again in fall, when North Carolina's roughly 19-tornadoes-a-year statewide average and its broader severe-thunderstorm activity concentrate. This is meaningfully different framing from a Gulf Coast or coastal-NC city's June-November hurricane-season calendar -- Durham's inland Piedmont location changes both the type of severe weather to expect and its seasonal timing. See the flood-hurricane-risk topic page for the fuller hazard breakdown.
Key takeaways
- Per NOAA 1991-2020 normals (RDU): January's average high/low is 52°F/32°F (mean 42°F); July highs are cited in a range of about 88-93°F depending on source, with lows around 70°F -- genuine four-season variation, unlike Houston's near-absence of true winter.
- Annual average temperature is cited around 59°F with roughly 46.7 inches of precipitation spread across the year.
- Winter is mild but real -- January mornings hover near freezing on average, and occasional snow and ice events (see the December 2002 benchmark ice storm on the flood-hurricane-risk topic page) are a genuine seasonal consideration.
- Durham's severe-weather calendar runs mainly spring (March-May) and fall, driven by North Carolina's ~19-tornadoes-a-year statewide average and Piedmont thunderstorm activity -- not a June-November hurricane season.
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