May weather in Flagstaff, AZ
The average temperature in Flagstaff in May is 51.3°F (34.6°F–68.1°F). Average precipitation: 0.77 inches. Average snowfall is 1.1 inches.
May is a spring month in Flagstaff, and is warmer than the annual average of 46.8°F. Daily temperatures swing about 33.5°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 13h 51m. For travel, May is cool.
Avg High
68.1°F
Avg Low
34.6°F
Precipitation
0.77 in
Snow
1.1 in
May records in Flagstaff
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 78.1°F (1943) | 17.1°F (1967) | 0.62 in (2016) |
| May 2 | 80.1°F (1943) | 19.0°F (1972) | 0.50 in (1898) |
| May 3 | 77.0°F (1989) | 19.0°F (1942) | 0.60 in (1898) |
| May 4 | 78.1°F (1989) | 19.0°F (2001) | 0.67 in (1960) |
| May 5 | 79.0°F (1989) | 18.0°F (1950) | 0.55 in (1992) |
| May 6 | 81.0°F (1989) | 14.0°F (1975) | 0.45 in (1971) |
| May 7 | 81.0°F (1989) | 15.1°F (1938) | 0.33 in (1927) |
| May 8 | 84.9°F (1989) | 17.1°F (1965) | 0.77 in (1976) |
| May 9 | 81.0°F (1934) | 14.0°F (1930) | 0.94 in (2019) |
| May 10 | 82.0°F (1934) | 19.0°F (1953) | 0.56 in (1932) |
| May 11 | 86.0°F (1996) | 16.0°F (1933) | 0.81 in (1980) |
| May 12 | 86.0°F (1996) | 19.9°F (1953) | 0.45 in (1965) |
| May 13 | 82.0°F (1984) | 18.0°F (1953) | 0.53 in (1994) |
| May 14 | 82.9°F (1938) | 21.0°F (1942) | 0.59 in (1973) |
| May 15 | 81.0°F (1937) | 19.9°F (1942) | 0.65 in (2015) |
| May 16 | 80.1°F (1970) | 16.0°F (1955) | 0.60 in (1898) |
| May 17 | 82.0°F (1970) | 19.9°F (1943) | 0.39 in (2016) |
| May 18 | 82.0°F (1970) | 19.9°F (1943) | 0.65 in (2011) |
| May 19 | 84.9°F (2008) | 19.9°F (1971) | 0.82 in (2023) |
| May 20 | 84.0°F (2008) | 19.9°F (1960) | 1.00 in (1898) |
| May 21 | 82.0°F (2005) | 21.0°F (1974) | 0.52 in (1975) |
| May 22 | 84.9°F (1984) | 21.0°F (1972) | 0.78 in (2009) |
| May 23 | 84.9°F (1984) | 22.1°F (2021) | 0.63 in (2008) |
| May 24 | 84.0°F (1896) | 24.3°F (2019) | 1.11 in (1965) |
| May 25 | 84.9°F (1896) | 18.0°F (1980) | 0.23 in (1994) |
| May 26 | 90.0°F (1896) | 24.1°F (1972) | 0.75 in (1992) |
| May 27 | 93.0°F (1896) | 25.0°F (2012) | 0.36 in (2019) |
| May 28 | 91.9°F (1896) | 24.1°F (1929) | 0.61 in (1990) |
| May 29 | 87.1°F (1896) | 25.0°F (1929) | 0.92 in (1992) |
| May 30 | 90.0°F (1896) | 21.9°F (1953) | 0.46 in (1986) |
| May 31 | 89.1°F (2002) | 23.0°F (1988) | 0.50 in (1894) |