When to Visit Northern Arizona- Weather by Month

Thinking of visiting northern Arizona? Find out the best time of year to visit. To help you plan your trip we have included some average temperatures by month.

Flagstaff, Arizona, offers a unique climate compared to the rest of the state due to its high elevation (about 7,000 feet). This elevation makes Flagstaff much cooler, with distinct seasonal variations.

If you’re coming from Phoenix, summer is one of the best months to visit Flagstaff because it is usually 20-30 degrees cooler. Summer is a popular time to visit, but if you’re into winter sports December and January may be your favorite time of year here.

Table of Contents

Northern Arizona Weather by Month

January

Average High: 42°F (5.5°C)
Average Low: 16°F (-8.8°C)
Precipitation: 2.1 inches
Snowfall: 20.7 inches

January is the heart of winter in Flagstaff. Snow is common, and temperatures often dip well below freezing, especially at night. This month is great for winter sports enthusiasts, as the nearby Snowbowl ski resort is in full swing.

February

Average High: 44°F (6.6°C)
Average Low: 19°F (-7.2°C)
Precipitation: 2.3 inches
Snowfall: 17.3 inches

February continues the winter chill with frequent snowfalls, though temperatures start to climb slightly compared to January. The days are still short, but there’s plenty of sunshine to enjoy outdoor winter activities.

March

Average High: 49°F (9.4°C)
Average Low: 23°F (-5°C)
Precipitation: 2.4 inches
Snowfall: 19.6 inches

March is a transitional month, with lingering snow and occasional early spring weather. While snowstorms are still possible, you may start to notice a thaw as the days lengthen and the sun shines brighter.

April

Average High: 57°F (13.9°C)
Average Low: 27°F (-2.8°C)
Precipitation: 1.4 inches
Snowfall: 10.3 inches

April brings more spring-like weather, though snow can still make a surprise appearance. Daytime temperatures warm up, leading to the melting of snow and the first hints of greenery returning to the landscape.

May

Average High: 66°F (18.8°C)
Average Low: 33°F (0.5°C)
Precipitation: 0.8 inches
Snowfall: 1.4 inches

May is when spring truly takes hold in Flagstaff. Snow is rare, and the days are much warmer, making it a great time for hiking and exploring the area’s natural beauty. Flowers begin to bloom, and the forests come alive.

June

Average High: 77°F (25°C)
Average Low: 40°F (4.4°C)
Precipitation: 0.4 inches

June marks the beginning of summer with comfortable temperatures and minimal rainfall. The dry air and mild conditions are perfect for outdoor activities, with long daylight hours to enjoy them.

July

Average High: 80°F (26.6°C)
Average Low: 49°F (9.4°C)
Precipitation: 2.4 inches

July is the warmest month in Flagstaff, but temperatures remain pleasant compared to the lower desert regions of Arizona. This is also the start of the monsoon season, bringing afternoon thunderstorms that refresh the landscape and drop the temperatures.

August

Average High: 77°F (25°C)
Average Low: 47°F (8.3°C)
Precipitation: 3.1 inches

August continues the monsoon season with frequent thunderstorms in the afternoon. Despite the storms, there’s plenty of sunshine, and temperatures remain mild, making it an enjoyable time to be outdoors. August is usually when the sunflowers are in full bloom in Flagstaff.

September

Average High: 72°F (22.2°C)
Average Low: 39°F (3.8°C)
Precipitation: 2.1 inches

September brings a gradual cooling as summer winds down. The monsoons taper off, and the weather becomes more stable. This is a beautiful time in Flagstaff as the leaves begin to change color, signaling the approach of autumn.

October

Average High: 61°F (16.1°C)
Average Low: 30°F (-1.1°C)
Precipitation: 1.8 inches
Snowfall: 1.8 inches

October is fall at its finest in Flagstaff, with cool, crisp air and vibrant autumn colors. The first snowfall of the season is possible, but it’s usually light. This is a great month for hiking and enjoying the fall foliage.

November

Average High: 49°F (9.4°C)
Average Low: 22°F (-5.5°C)
Precipitation: 1.7 inches
Snowfall: 8.4 inches

November sees a sharp drop in temperatures as winter approaches. Snow becomes more common, especially towards the end of the month. The days are shorter, and the chill in the air is a reminder that winter is near.

December

Average High: 42°F (5.5°C)
Average Low: 17°F (-8.3°C)
Precipitation: 2.0 inches
Snowfall: 16.5 inches

December is a cold and snowy month in Flagstaff. Winter is in full swing, with frequent snowfalls and freezing temperatures. It’s a festive time, with the town often blanketed in snow, making it feel like a winter wonderland.