Flagstaff Weather Records

Flagstaff, Arizona weather averages and records from 1893–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Flagstaff, Arizona was 99 °F which occurred on July 28, 1898.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Flagstaff, Arizona was -30 °F which occurred on January 22, 1937.
Lowest Temperatures: All-Time By Year
Flagstaff Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 43.4 17.7 66 -30 2.1 20.9
February 45.7 19.7 71 -23 2.2 19.3
March 52.4 23.9 73 -16 1.9 15.6
April 59.2 28.2 83 -2 0.9 5.0
May 68.0 34.7 93 14 0.8 1.1
June 79.1 42.3 96 22 0.3 0.0
July 82.0 51.3 99 32 2.6 0.0
August 79.3 50.5 95 24 3.0 0.0
September 74.1 42.5 91 22 1.8 0.0
October 63.6 31.5 85 -2 1.5 1.5
November 52.2 23.1 74 -13 1.5 8.2
December 43.1 17.0 68 -23 1.9 17.8
Entire year 61.9 31.9 99 -30 20.5 90.4
More Flagstaff Weather Records
1893–2024
Highest daily low 72 °F July 13, 1897
Lowest daily high 5 °F January 12, 1963
Greatest daily range
(Difference of high and low)
59 °F May 28, 1896
Greatest difference in daily high
over two conscutive days
28 °F Mar 11–12, 1956
Most daily precipitation 3.9 inches February 19, 1993
Most monthly precipitation 12.2 inches January 1895
Most yearly precipitation 36.6 inches 1965
Most yearly days with precipitation 112 1983
Earliest snow in season September 19 1965
Latest snow in season May 29 1990
Most daily snow 35.9 inches February 21, 2019
Most monthly snow 126.0 inches January 1895
Most yearly snow 184.3 inches 1965
Most snow in a winter 210.0 inches 1972–1973
Greatest snow accumulation 83.0 inches December 20, 1967
Earliest freeze August 23 1968
Earliest day ≥ 80 °F April 7 1989
Earliest day ≥ 90 °F May 26 1896
Latest freeze June 28 1965
Latest day ≥ 80 °F October 15 2020
Latest day ≥ 90 °F September 6 2020
Most days in a year < 0 °F 23 1932
Most days in a year < 32 °F 230 1971
Most days in a year ≥ 80 °F 96 2020
Most days in a year ≥ 90 °F 30 1898
Flagstaff Weather Streaks
Most consecutive days...
With precipitation 17 days Jul 20 – Aug 5, 1968
Without precipitation 99 days Sep 24 – Dec 31, 1999
With snow 11 days Feb 7–17, 1992
High temperature at or
below freezing
14 days Dec 18–31, 1905
High temperature ≥ 80 °F 39 days Jun 13 – Jul 21, 2007
High temperature ≥ 90 °F 11 days Jun 21 – Jul 1, 1990
Plant Hardiness Zone
6A
Flagstaff is in plant hardiness zone 6A
based on average yearly minimum temperature from 1991–2020
Facts About Flagstaff Weather
Flagstaff Weather by Year
More Flagstaff Weather
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Weather Station Details
Years Station Coordinates
1893–2024 Flagstaff Pulliam Airport location