Climate & Weather in Johnson City
Johnson City has a humid subtropical climate with warm, humid summers and mild-but-genuinely-wintry winters -- summer highs in the low 90s, January highs around 46°F and lows around 25°F, and real annual snowfall (about 11 inches) uncommon in Tennessee's larger, more southerly metros.
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Learn moreWarm, humid summers and cooler winters than most of Tennessee
Summer temperatures range from the mid-70s to low-90s (°F), while winter temperatures range from the high-30s to low-50s, with January -- the coldest month -- averaging a 46°F high and 25°F low. The city sees about 201 sunny days per year and roughly 44 inches of rain annually.
Real winter snowfall, driven by elevation and northern latitude
Johnson City averages about 11 inches of snow per year, with measurable snowfall typically starting in December and continuing through March; January is the snowiest month, averaging 3.4 inches. This is genuinely more winter weather than Nashville, Memphis, or Chattanooga typically see, a direct function of the city's Appalachian-foothills elevation and its position further north and east within Tennessee.
Tornado season peaks in spring, with a real secondary fall peak
Per NWS Morristown climatology, tornadoes have occurred in every month within the forecast area, with the greatest number in April and a secondary "second season" peak in November -- broadly consistent with the spring-and-fall pattern described for the rest of Tennessee in the state record, though the region's mountainous terrain genuinely affects storm development differently than the flatter Middle/West Tennessee corridors.
No hurricane wind exposure, but real inland-remnant rainfall risk
Johnson City has no direct hurricane wind or storm-surge exposure, sitting well inland in the Appalachian foothills. As documented in the state record, however, East Tennessee is not fully storm-isolated -- Hurricane Helene's September 2024 remnants caused real, significant flooding in the broader Smokies/East Tennessee region, a reminder relevant to anyone assuming inland Appalachian Tennessee is entirely free of tropical-system impact.
Key takeaways
- Johnson City has a humid subtropical climate: summer highs in the low 90s, January highs around 46°F and lows around 25°F, roughly 44 inches of rain and 201 sunny days annually.
- The city averages about 11 inches of snow per year (3.4 inches in January, the snowiest month) -- genuinely more winter weather than Nashville, Memphis, or Chattanooga, given its elevation and latitude.
- Tornado risk peaks in April with a secondary November peak, per NWS Morristown climatology -- real but comparatively lower-frequency than Middle/West Tennessee, and shaped by the region's mountainous terrain.
- No direct hurricane wind/storm-surge exposure, but East Tennessee is not fully storm-isolated -- Hurricane Helene's September 2024 remnants caused real regional flooding elsewhere in East Tennessee.
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