Flagstaff Arizona and the San Francisco Peaks

Flagstaff Arizona Weather & Average Temperatures

Originally written by Tony Subia

Reviewed and updated by AZ Leisure Staff Writers on August 13, 2026.

Flagstaff, Arizona weather is dramatically different from the desert climate found in Phoenix and much of southern Arizona. At an elevation of about 7,000 feet, Flagstaff experiences four distinct seasons with mild summer days, cool nights, colorful fall weather, snowy winters and rapidly changing spring conditions. Summer also brings the northern Arizona monsoon, while winter storms can produce significant snowfall throughout the Flagstaff high country.

Current Flagstaff Weather
Average Monthly Temperatures
Weather By Season
Snowfall & Winter Weather
Summer Monsoon
Best Time To Visit
What To Pack
FAQ

San Francisco Peaks near Flagstaff Arizona in high-country weather

Current Weather In Flagstaff Arizona

Flagstaff Average Temperatures And Climate

Flagstaff has a high-elevation, semi-arid climate with large temperature differences between daytime highs and overnight lows. Summers are generally mild compared with Arizona's desert cities, while winter nights routinely fall below freezing. Current climate information lists approximately 22.96 inches of average annual precipitation and about 108.8 inches of average annual snowfall for Flagstaff.

The temperature chart below shows typical monthly high and low temperatures and can help with trip planning throughout the year. Actual conditions can vary considerably from climate averages, especially during winter storms, spring cold fronts and summer thunderstorms.

Flagstaff Arizona average monthly high and low temperatures weather chart

Flagstaff Weather By Season

Spring Weather

Spring in Flagstaff can change quickly from mild sunshine to wind, cold temperatures and occasional snow. March and April can still produce freezing nights, while May typically brings warmer afternoons. Layered clothing is especially useful during spring because daytime and nighttime temperatures can differ significantly.

Summer Weather

Summer days in Flagstaff are generally mild, with average daytime highs commonly in the 70s and low 80s. Nights remain much cooler because of the city's elevation. July through September is the primary monsoon period, when afternoon thunderstorms can bring brief heavy rain, lightning, gusty winds and rapidly falling temperatures.

Fall Weather

Fall typically brings cool days, crisp nights and relatively dry conditions. September can still feel summerlike during the afternoon, but overnight temperatures fall quickly as the season progresses. October is especially popular for fall foliage in the San Francisco Peaks and surrounding high country.

Winter Weather

Winter in Flagstaff is cold and snowy, with freezing nighttime temperatures common and major storms capable of producing substantial snowfall. Snow creates excellent conditions for skiing and snow recreation, but winter visitors should check forecasts and highway conditions before traveling.

Flagstaff Snowfall And Winter Weather

Flagstaff is one of Arizona's snowiest communities. Current local climate information lists average annual snowfall at approximately 108.8 inches, although snowfall can vary widely from one winter to another. Snowfall is possible from late fall into spring, and major winter storms can temporarily affect Interstate 17, Interstate 40 and other mountain roads.

Winter recreation includes skiing and snowboarding at Arizona Snowbowl, snow play and sledding, while visitors planning a winter trip should monitor current forecasts and road conditions before departure.

Flagstaff Summer Monsoon Weather

Flagstaff's summer monsoon season brings an increased chance of afternoon and evening thunderstorms, particularly from July into September. Storms can develop quickly and may produce lightning, brief heavy rain, gusty winds and sudden temperature changes.

Hikers and other outdoor visitors should begin weather-sensitive activities early, monitor the forecast and avoid exposed ridges, peaks and open areas when thunderstorms are developing. Conditions at higher elevations such as the San Francisco Peaks can change faster than conditions in downtown Flagstaff.

Best Time To Visit Flagstaff

The best time to visit Flagstaff depends on the activities you have planned. Summer is popular for hiking, camping, fishing and escaping Arizona's lower-elevation heat. Fall brings cooler weather and colorful aspens, while winter attracts visitors for skiing, snowboarding and snow play. Spring offers fewer crowds and improving temperatures, although late-season snow and rapidly changing weather are still possible.

Because Flagstaff is a year-round destination, there is no single best month for every visitor. Choose the season that matches the activities you want to enjoy and check the current forecast before traveling.

What To Pack For Flagstaff Weather

Winter: Warm coat, gloves, hat, insulated footwear and clothing suitable for snow and freezing temperatures.
Spring: Layers, a warm jacket and clothing suitable for both mild afternoons and cold mornings.
Summer: Lightweight daytime clothing, a light jacket for cool evenings, sun protection and rain gear during monsoon season.
Fall: Layers, long pants and a jacket for increasingly cool evenings and mornings.
Year-round: Sunglasses, sunscreen, comfortable shoes and plenty of water are useful because of Flagstaff's elevation and strong high-country sun.

Things To Do In Flagstaff By Season

Spring: Explore historic downtown Flagstaff, hike lower-elevation trails and enjoy scenic drives as temperatures begin to warm.
Summer: Hike in the pines, visit lakes near Flagstaff, camp and enjoy high-country outdoor recreation.
Fall: Photograph changing aspens, hike in cooler weather and explore the San Francisco Peaks.
Winter: Ski or snowboard at Arizona Snowbowl, enjoy snow play and explore Flagstaff's winter attractions.

Frequently Asked Questions About Flagstaff Weather

What is the weather like in Flagstaff Arizona?

Flagstaff has a four-season, high-elevation climate with mild summers, cold snowy winters, cool spring and fall weather, and a summer monsoon season that brings periodic thunderstorms.

How hot does Flagstaff get in summer?

Summer is generally mild compared with Arizona's desert cities. Average daytime highs are commonly in the 70s and low 80s, while nighttime temperatures are considerably cooler.

How much snow does Flagstaff receive?

Current Flagstaff climate information lists average annual snowfall at approximately 108.8 inches. Actual snowfall varies considerably from one winter to another.

When is monsoon season in Flagstaff?

The primary summer monsoon period is generally July through September, when afternoon thunderstorms become more frequent.

Does Flagstaff get cold at night during summer?

Yes. Flagstaff's high elevation and dry air create large temperature swings between daytime highs and nighttime lows, so summer evenings and early mornings can feel cool.

Does it snow in Flagstaff during spring?

Yes. Snow remains possible during spring, particularly in March and April, and colder storms can occasionally affect the area later in the season.

What is the best season to visit Flagstaff?

Flagstaff can be visited year-round. Summer is popular for hiking and escaping desert heat, fall for foliage and cooler weather, winter for snow recreation, and spring for quieter travel and gradually warming temperatures.

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