What's on in Flagstaff, United States through the year
Flagstaff, United States has 6 curated events through the year — 2 festivals, 1 natural spectacle, 1 season, 1 hazard season and 1 seasonal opening. The ones to plan around: Flagstaff Festival of Science (September) and Flagstaff Star Party (September). January, March, September, November and December are its peak-crowd months.
Updated September 2026 · every event curated and sourced · dates for 2026 where they are announced, the usual window where they are not
Flagstaff events and crowds by month
| Month | What starts | Crowds |
|---|---|---|
| January | — | Peak crowds |
| February | — | Busy |
| March | — | Peak crowds |
| April | — | Busy |
| May | Fire restrictions and smoke | Shoulder season |
| June | Southwest monsoon | Busy |
| July | — | Busy |
| August | — | Busy |
| September | Aspen colour on the Peaks, Flagstaff Festival of Science, Flagstaff Star Party | Peak crowds |
| October | — | Busy |
| November | Arizona Snowbowl season | Peak crowds |
| December | — | Peak crowds |
January in Flagstaff
Flagstaff weather in January →Peak crowds — Arizona Snowbowl season, Winter / Christmas break in United States
Nothing new starts in January.
Still on: Arizona Snowbowl season (15 Nov – 10 Apr (usually))
February in Flagstaff
Flagstaff weather in February →Busy — Arizona Snowbowl season
Nothing new starts in February.
Still on: Arizona Snowbowl season (15 Nov – 10 Apr (usually))
March in Flagstaff
Flagstaff weather in March →Peak crowds — Arizona Snowbowl season, Spring break in United States
Nothing new starts in March.
Still on: Arizona Snowbowl season (15 Nov – 10 Apr (usually))
April in Flagstaff
Flagstaff weather in April →Busy — Arizona Snowbowl season
Nothing new starts in April.
Still on: Arizona Snowbowl season (15 Nov – 10 Apr (usually))
May in Flagstaff
Flagstaff weather in May →Shoulder season — an ordinary month
- Hazard
Fire restrictions and smoke
1 May – 10 Jul · usuallySmoke seasonClosuresThe dry weeks before the rains arrive are when the Coconino forest goes to stage restrictions and sometimes shuts entirely — no campfires, and in a bad year no access. Smoke from prescribed burns and from fires in the ponderosa sits in the basin. Source ↗
June in Flagstaff
Flagstaff weather in June →Busy — Summer break in United States, school holidays in 2 of the markets that fill it
- Season
Southwest monsoon
15 Jun – 30 SepRiskStorms build over the Peaks most afternoons from early July, drop hard for an hour and clear, and the burn scars above town flood downhill when they do. It is the greenest and the most dramatic the high desert gets. Source ↗
Still on: Fire restrictions and smoke (1 May – 10 Jul (usually))
July in Flagstaff
Flagstaff weather in July →Busy — Summer break in United States, school holidays in 2 of the markets that fill it
Nothing new starts in July.
Still on: Fire restrictions and smoke (1 May – 10 Jul (usually)), Southwest monsoon (15 Jun – 30 Sep)
August in Flagstaff
Flagstaff weather in August →Busy — Summer break in United States, school holidays in 2 of the markets that fill it
Nothing new starts in August.
Still on: Southwest monsoon (15 Jun – 30 Sep)
September in Flagstaff
Flagstaff weather in September →Peak crowds — Aspen colour on the Peaks, Summer break in United States
- Nature
Aspen colour on the Peaks
20 Sep – 15 Oct · usuallyAutumn colourCrowdedThe stands in the Inner Basin and along Hart Prairie turn gold for about a fortnight, starting high and working down. The Lockett Meadow road is single track and the car park is full by nine on an October weekend. Source ↗
- Festival
Flagstaff Festival of Science
25 Sep – 4 OctMajor festivalTen days of free talks, observatory openings and field trips run by a town that has an astronomy observatory, a university and the US Geological Survey in it. Everything is free and most of it books out. Source ↗
- Festival
Flagstaff Star Party
1–3 OctDark-sky seasonTelescopes out in Buffalo Park for three nights in the world's first dark sky city, which has been running amber street lighting since 2001. Bring more layers than the daytime suggests. Source ↗
Still on: Southwest monsoon (15 Jun – 30 Sep)
October in Flagstaff
Flagstaff weather in October →Busy — Aspen colour on the Peaks
Nothing new starts in October.
Still on: Aspen colour on the Peaks (20 Sep – 15 Oct (usually)), Flagstaff Festival of Science (25 Sep – 4 Oct), Flagstaff Star Party (1–3 Oct)
November in Flagstaff
Flagstaff weather in November →Peak crowds — Arizona Snowbowl season, Thanksgiving break in United States
- Opening
Arizona Snowbowl season
15 Nov – 10 Apr · usuallySki seasonCrowdedSkiing above 9,000 feet an hour and a half from Phoenix, opening when the snowmaking allows rather than on a fixed date. The access road queues on a powder Saturday, and the resort runs the gondola for sightseeing at weekends in autumn. Source ↗
December in Flagstaff
Flagstaff weather in December →Peak crowds — Arizona Snowbowl season, Winter / Christmas break in United States
Nothing new starts in December.
Still on: Arizona Snowbowl season (15 Nov – 10 Apr (usually))