Daily weather ranking for Great Smoky National Park, based on temperature, sunshine, wind, precipitation and humidity.
The table below shows Great Smoky Mountains' Perfect Weather Index (PWI) for the next 7 days. Higher scores indicate more comfortable outdoor conditions.
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How to use this: Days with higher scores are generally better for hiking and outdoor activities, with more comfortable temperatures, lighter winds, and fewer weather impacts.
October offers the most consistently comfortable weather but with fall leaf peeping crowds. March and September deliver very good conditions with fewer crowds.
Using 2025 Perfect Weather Index (PWI) data, the Smokies show a very different pattern than desert parks: strong spring and fall peaks, weather-driven summer humidity penalties, and cooler—but often workable—winter conditions. The raw values were normalized to monthly PWI scores (percent of possible points) and paired with the number of rare Perfect 10 days.
| Month | Monthly PWI Score | Perfect 10 Days | What It Means |
|---|---|---|---|
| January | ~60% | 0 | Cold, quiet, limited high-elevation access |
| February | ~69% | 2 | Cool but improving temps, very low crowds |
| March | ~77% | 4 | Spring transition, frequent great days |
| April | ~76% | 0 | Mild but variable, showers common |
| May | ~71% | 2 | Warm, greener, humidity rising |
| June | ~65% | 0 | Warm, humid, storms increase |
| July | ~66% | 0 | Hot, very humid, storm-prone |
| August | ~71% | 0 | Still humid, slightly improving |
| September | ~76% | 2 | Drier, cooler, excellent hiking |
| October | ~80% | 5 | Peak conditions, very reliable |
| November | ~76% | 1 | Cool, crisp, quieter trails |
| December | ~69% | 0 | Cold but stable, light crowds |
| Month | % of Visitors | # of Visitors |
|---|---|---|
| January | 3% | 407,804 |
| February | 4% | 472,412 |
| March | 7% | 872,124 |
| April | 8% | 951,189 |
| May | 10% | 1,266,832 |
| June | 11% | 1,378,182 |
| July | 11% | 1,385,854 |
| August | 9% | 1,150,247 |
| September | 8% | 1,015,889 |
| October | 12% | 1,510,684 |
| November | 8% | 1,016,062 |
| December | 6% | 764,555 |
October is the clear winner—the highest overall score and the most Perfect 10 days. March and September also stand out, offering consistently comfortable temperatures before summer humidity or winter cold take hold.
Looking beyond individual months, Great Smoky Mountain's weather falls into four distinct seasonal patterns that directly affect hiking safety, comfort, and crowd levels.
Winter is cold, especially at higher elevations, with occasional snow and ice. That said, weather can be surprisingly stable, and low elevations often remain hikeable. Visitor numbers are at their lowest.
Best for: Quiet hikes, photography, waterfalls
Watch for: Icy roads, trail closures at elevation
Spring is a transition season. March performs especially well, with frequent comfortable days, while April and May bring more clouds and showers. Wildflowers peak, but weather variability increases.
Best for: Wildflowers, moderate hiking
Watch for: Rain, fast-changing conditions
Summer scores lower due to heat, high humidity, and frequent thunderstorms. Mornings can still be pleasant, especially at higher elevations, but overall comfort drops.
Best for: Early hikes, high ridges, waterfalls
Watch for: Heat stress, lightning, slick trails
Fall is the Smokies’ most reliable season. October delivers the best weather of the year, followed closely by September and November. Cooler temperatures and lower humidity greatly improve hiking comfort.
Best for: Long hikes, scenic drives, photography
Watch for: Heavy visitation during peak foliage
For weather-driven planning, October is the best time to visit Great Smoky Mountains National Park. If you want a strong balance of comfort and lighter crowds, March and September are outstanding alternatives—offering many near-perfect hiking days without peak-season congestion.
Explore more: All National Parks · Best Weather This Week