June in Great Smoky Mountains National Park is a best window month: highs around 84°F, lows around 60°F. Crowds: peak crowds — #1 busiest of the park's 12 months. Synchronous fireflies light up early June (lottery entry). The editorial best window here is June & October. You get about 14h 33m of daylight. To finish Alum Cave Trail (2h 5m) before dark, leave the trailhead by about 6:45 PM.
Month data reviewed · how we check this
| Verdict | Best window The editorial pick — weather, access and experience line up. |
|---|---|
| Temps °F | 84° high / 60° low |
| Crowds | peak crowds · #1 busiest of the park's 12 months |
| What June is like | Synchronous fireflies light up early June (lottery entry) |
| Best window (whole year) | June & October |
| Peak crowds (whole year) | Jun–Aug, Oct |
CROWDS: RELATIVE SEASONALITY FROM NPS VISITATION STATISTICS · TEMPS: APPROXIMATE NOAA NORMALS AT MAIN VISITOR ELEVATION — HIGH COUNTRY RUNS 10–20°F COLDER
DAYLIGHT ON JUNE 15 · LOCAL PARK TIME (EDT)COMPUTED FROM THE PARK'S OWN COORDINATES FOR THE 15TH — THE MIDDLE OF THE MONTH STANDS FOR IT, AS IT DOES FOR CLIMATE NORMALS. WITHIN A MONTH THESE TIMES SHIFT BY UP TO AN HOUR
LEAVE THE TRAILHEAD BY — TO FINISH BEFORE DARK ON JUNE 15WALKING TIMES ESTIMATED FROM EACH TRAIL'S MEASURED DISTANCE AND ELEVATION GAIN — A PLANNING FIGURE, NOT A PACE. ADD YOUR OWN MARGIN FOR PHOTOS, REST AND CROWDS. WATER AT THE COOL-WEATHER RATE, BECAUSE THIS MONTH AVERAGES 84°F. TRAILS WE HAVE NOT MEASURED ARE LEFT OUT RATHER THAN GUESSED
WHAT JUNE ASKS OF YOU HEREGreat Smoky Mountains National Park in July — Good, highs around 87°F, crowds: peak crowds (peak summer crowds in america's most-visited park).
Our verdict for June is "Best window". The editorial pick — weather, access and experience line up. Expect highs around 84°F and lows around 60°F, with crowds at the "peak crowds" level. Temperatures are approximate NOAA normals at the main visitor elevation; crowd levels follow published NPS visitation statistics.
Across the full 12-month review, the best window is June & October, and the peak-crowd months are Jun–Aug, Oct. June itself we rate "Best window".
July we rate "Good" against "Best window" for June, with highs around 87°F and crowds at the "peak crowds" level.
About 14h 33m on June 15: the sun rises around 6:18 AM and sets around 8:51 PM local park time (EDT). Computed from the park's own coordinates, so it is the light you actually get at the trailhead, not the nearest city's.
Alum Cave Trail takes about 2h 5m of walking, so on June 15 you would need to leave the trailhead by about 6:45 PM to finish before dark — the sun sets around 8:51 PM local park time (EDT). Walking times are estimated from each trail's measured distance and elevation gain, so treat them as a planning figure and add your own margin for photos, rest and crowds.
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