Daily weather ranking for Zion National Park, based on temperature, sunshine, wind, precipitation and humidity.
The table below shows Zion's 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, while December and April deliver near-perfect conditions with fewer crowds.
Using 2025 Perfect Weather Index (PWI) data from the Zion Visitor Center, clear seasonal patterns emerge. To make the numbers meaningful, the raw monthly totals were normalized to a monthly PWI score (percent of possible points) and paired with the count of rare Perfect 10 days. Higher percentages mean more consistently comfortable conditions for hiking, sightseeing, and scenic drives.
| Month | Monthly PWI Score | Perfect 10 Days | What It Means |
|---|---|---|---|
| January | ~72% | 0 | Cool, quiet, some cold mornings |
| February | ~79% | 3 | Improving temps, still low crowds |
| March | ~75% | 0 | Variable spring weather |
| April | ~82% | 3 | Excellent balance of warmth & comfort |
| May | ~77% | 0 | Warmer days, rising heat |
| June | ~70% | 0 | Hot afternoons begin |
| July | ~69% | 0 | Heat + monsoon storms |
| August | ~65% | 0 | Hottest, most humid period |
| September | ~73% | 0 | Gradual cooling |
| October | ~83% | 4 | Peak conditions, very reliable |
| November | ~81% | 3 | Cool, crisp, fewer people |
| December | ~82% | 5 | Surprisingly excellent winter weather |
| Month | % of Visitors | # of Visitors |
|---|---|---|
| January | 3% | 130,503 |
| February | 3% | 139,039 |
| March | 8% | 343,141 |
| April | 8% | 364,993 |
| May | 11% | 474,301 |
| June | 12% | 556,426 |
| July | 12% | 554,096 |
| August | 10% | 469,603 |
| September | 11% | 486,413 |
| October | 11% | 484,521 |
| November | 6% | 286,923 |
| December | 4% | 200,044 |
October is the clear standout, with the highest overall score and multiple Perfect 10 days—cool mornings, mild afternoons, low humidity, and minimal weather disruption. December, April, and November follow closely, offering consistently comfortable conditions and some of the year’s best hiking weather.
Looking beyond individual months, Zion’s weather falls into four distinct seasonal patterns that directly affect hiking safety, comfort, and crowd levels.
Winters are cooler but often stable and dry. Snow is possible but usually short-lived at canyon elevations. December performs exceptionally well, making it one of the most underrated months for hiking, photography, and scenic drives. Visitor numbers are low, which greatly enhances trail access and overall experience.
Best for: Hiking lower elevations, photography, solitude
Watch for: Cold mornings, occasional icy trails
Spring brings variability. April stands out with warm days and comfortable conditions, while March and May can swing between cool and hot. Snowmelt can raise river levels, affecting routes like The Narrows.
Best for: General hiking, canyon views
Watch for: Rapid weather changes, spring runoff
Despite long daylight hours, summer scores lowest. High heat and monsoon-driven thunderstorms reduce comfort and can create flash flood risks in slot canyons.
Best for: Early-morning hikes, higher elevations
Watch for: Heat stress, lightning, flash floods
Fall is Zion’s most reliable season. October and November combine mild temperatures, low humidity, and stable conditions, aligning perfectly with Zion’s most popular hikes.
Best for: Long hikes, backpacking, iconic trails
Watch for: Crowds in October (weather-driven demand)
If weather alone decides your trip, October is the best month to visit Zion National Park. If you want near-perfect conditions with fewer people, December and November are exceptional alternatives—something most visitors overlook.
Explore more: All National Parks · Best Weather This Week · Other Desert Parks