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When does it first snow in Flagstaff, AZ?

At Flagstaff, the typical date of the first measurable snowfall (0.1 inch or more in a day) is Nov 9. That is the median over the last 30 snow seasons: half of seasons saw it earlier, half later. In about 1 season in 10 it came by Oct 12, and in 1 in 10 not until Dec 14 or later. The earliest was Oct 7 (2018-19) and the latest Jan 15 (2005-06). A first snowfall of at least 1 inch in a single day typically arrives around Nov 28, and 100% of seasons had one. The first freeze of fall (a low of 32°F or colder) typically comes around Sep 28, and the last freeze of spring around Jun 3.

This season so far (2026-27, data through Oct 16, 2026): no measurable snow recorded yet; first freeze (32°F or colder) Oct 14 at this station. Compare with the typical dates above. This is observed data and can lag by a day or two, and it is not a forecast.

Nov 9Median first measurable snow (0.1"+)

Nov 28Median first 1"+ snowfall

83.3"Average snowfall per season

Sep 28Median first fall freeze (≤32°F)

Jun 3Median last spring freeze (≤32°F)

112Median freeze-free days between

First snowfall dates at Flagstaff

First day with…	Median date	Typical range (10th–90th pct)	Earliest in 30 seasons	Latest in 30 seasons	Seasons with one
0.1" of snow or more (measurable)	Nov 9	Oct 12 – Dec 14	Oct 7 (2018-19)	Jan 15 (2005-06)	100%
1" of snow or more	Nov 28	Nov 4 – Dec 18	Oct 21 (2004-05)	Mar 10 (2005-06)	100%
3" of snow or more	Dec 11	Nov 4 – Jan 20	Oct 21 (2004-05)	Mar 10 (2005-06)	100%

Based on 22 seasons (July–June, 1995-96 to 2024-25) with at least 85% complete daily snowfall records at the station. Dates are for a single day’s snowfall, so "1 inch" means one calendar day with 1" or more, not total accumulation.

Chance the first snow has already happened by a given date

Snowfall	By Nov 1	By Dec 1	By Jan 1
0.1"+ (measurable)	27%	77%	91%
1"+	5%	59%	91%

In spring, the last measurable snowfall of the season typically falls around Apr 27 (median).

First and last freeze dates in Flagstaff

Threshold	Event	Median date	Typical range (10th–90th pct)	Earliest / latest	Years with one
32°F or colder (freeze)	First in fall	Sep 28	Sep 10 – Oct 7	Sep 4 (1999) / Oct 18 (2024)	100%
32°F or colder (freeze)	Last in spring	Jun 3	May 23 – Jun 20	–	100%
28°F or colder (hard freeze)	First in fall	Oct 8	Sep 24 – Oct 27	Sep 10 (2020) / Nov 1 (2015)	100%
28°F or colder (hard freeze)	Last in spring	May 24	May 4 – Jun 15	–	100%

Based on the station’s daily minimum temperature, 1995–2024. “Freeze” here means a daily low at or below the threshold, which is not the same as visible frost. Your yard can differ by several degrees and days from an airport weather station, so use these as planning odds, not guarantees.

The median stretch between the last spring freeze and the first fall freeze (the freeze-free season) was about 112 days.

Nearby weather stations

Source station: Flagstaff Ap (USW00003103), elevation 6,999 ft. Data: NOAA NCEI GHCN-Daily. Computed by First Snow Dates; how we calculate this. Historical averages only; for a forecast see weather.gov.

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