Flagstaff weather
11-year climate averages (2015–2025), month by month
Flagstaff in october
Current month averages, based on 11 complete years of records (2015–2025). Read the full guide →
Flagstaff sits at 35°11′N 111°39′W in United States, in North America. Its climate profile is shaped by these coordinates — and the 11 complete years of records below (2015–2025) reveal exactly how each season feels on the ground.
Below, you'll find monthly averages for temperature, rainfall and sunshine, drawn from the Open-Meteo Archive. Every month links to a full guide with what to pack, where to stay, and when to arrive.
The year in weather
Flagstaff weather by month
Pick a month for the full climate guide — temperature, rainfall, sunshine, packing tips and hotel deals for Flagstaff.
Places that feel like Flagstaff in october
Flagstaff weather — FAQ
Q01Which months are best for visiting Flagstaff?
Which months are best for visiting Flagstaff?
The best months to visit Flagstaff are April, May, June, July. September-October brings golden aspen at Snowbowl and the Grand Canyon rim without summer thunderstorm evacuations or elk-rut road closures on 89.
Q02Which month is warmest in Flagstaff?
Which month is warmest in Flagstaff?
July runs the highest averages in Flagstaff, with typical daytime highs of 29°C (83°F). July monsoon hits daily 3pm; locals hike Humphreys Peak trail before dawn and Lowell Observatory star parties actually work between storm cells.
Q03Which month is chilliest in Flagstaff?
Which month is chilliest in Flagstaff?
January brings the lowest averages, with daytime highs near 5°C (41°F). December-February delivers 100+ inches snow; Snowbowl runs 8 lifts, Route 66 shops close 5pm, and Amtrak Southwest Chief still stops at 4am.
Q04When is the rainy season in Flagstaff?
When is the rainy season in Flagstaff?
August typically records the highest monthly rainfall — around 58mm on average. Monsoon rain July-September comes as violent 45-minute cells with hail; dry washes flash-flood and Oak Creek closes to swimmers.
Q05How would you describe Flagstaff's weather?
How would you describe Flagstaff's weather?
Flagstaff, United States has warm summers, cold winters. At 7000 feet, altitude sickness hits Phoenix escapees hard; locals push water and skip alcohol first 48 hours. Historic downtown's Weatherford Hotel still has its 1897 zograscope in the lobby. Diablo Burger sources beef from local ranches within 250 miles by law. NAU students call it 'Flag' never Flagstaff. Sunset Crater's black lava fields are 900 years old and still warm underfoot in July. You can read the detailed month-by-month breakdown on this page.