Grand Canyon National Park

Daily weather ranking for Grand Canyon National Park, based on temperature, sunshine, wind, precipitation and humidity.

Grand Canyon National Park — 7-Day PWI

The table below shows Grand Canyon'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.

→ View official National Weather Service forecast for Grand Canyon National Park

When Is the Best Time to Visit Grand Canyon National Park for Perfect Weather?

October offers the most consistently comfortable weather at Grand Canyon National Park, while March and September provide very good hiking conditions with fewer crowds.

Based on 2025 Perfect Weather Index (PWI) data from the Grand Canyon Visitor Center (South Rim), the park shows a strong fall peak, a solid late-spring shoulder season, and more weather variability tied to elevation, heat, and monsoon activity. Raw values were normalized into monthly PWI scores (percent of possible points) and paired with the count of rare Perfect 10 days.

Monthly Perfect Weather Summary (2025)

Month	Monthly PWI Score	Perfect 10 Days	What It Means
January	~65%	0	Cold, quiet, winter conditions
February	~70%	0	Cool, improving reliability
March	~71%	2	Transitional spring weather
April	~79%	0	Mild, very good hiking
May	~79%	2	Warm days, excellent comfort
June	~73%	0	Early summer heat begins
July	~71%	0	Hot with monsoon influence
August	~69%	0	Humidity and storms linger
September	~78%	1	Cooling, more stable
October	~86%	8	Outstanding, most reliable
November	~79%	4	Cool, crisp, quieter
December	~75%	0	Cold but generally stable

Monthly Visitor Statistics (avg 2019-2023 source:NPS)

Month	% of Visitors	# of Visitors
January	4%	175,848
February	4%	191,721
March	8%	402,019
April	8%	472,467
May	10%	551,570
June	10%	496,170
July	11%	538,554
August	10%	507,709
September	10%	471,930
October	9%	455,042
November	7%	334,942
December	7%	321,191

Best Overall Months

October is the clear best month—the highest overall score and by far the most Perfect 10 days. April, May, and November also perform very well, offering consistently comfortable conditions without the extremes of summer heat or winter cold.

Seasonal Weather Patterns & Outdoor Impact

Looking beyond individual months, Grand Canyon's weather falls into four distinct seasonal patterns that directly affect hiking safety, comfort, and crowd levels.

Winter (December–February)

Winter at the South Rim is cold, with frequent freezing mornings and occasional snow. Conditions are often stable, but icy trails and road closures can limit access. Crowds are minimal.

Best for: Solitude, winter photography
Watch for: Snow, ice, limited services

Spring (March–May)

Spring steadily improves. March is variable, but April and May bring some of the best hiking weather of the year, with mild temperatures and generally dry conditions.

Best for: Hiking, rim walks, photography
Watch for: Wind, lingering cold snaps early

Summer (June–August)

Despite popularity, summer scores lower due to heat and monsoon thunderstorms. Afternoon storms and lightning are common, and inner-canyon hikes become hazardous due to extreme heat.

Best for: Early mornings, rim viewpoints
Watch for: Heat illness, lightning, flash floods

Fall (September–November)

Fall is the Grand Canyon’s most reliable season. October stands out nationally, combining cool days, low humidity, and exceptional consistency. November remains excellent with fewer visitors.

Best for: Long hikes, backpacking, scenic drives
Watch for: Early snow late in the season

Weather vs. Crowds: A Key Tradeoff

October: Best weather and high demand
April & May: Excellent weather with rising crowds
Summer: Peak visitation despite lower comfort
Winter: Lowest crowds but colder conditions

Bottom Line

For weather-focused planning, October is the best time to visit Grand Canyon National Park. If you’re looking for near-ideal hiking conditions with slightly fewer people, April, May, and November are outstanding alternatives that still deliver consistently comfortable weather.

Explore more: All National Parks · Best Weather This Week · Other Desert Parks