Flagstaff Weather in May
Average highs run from 63°F on May 1 to 74°F on May 31, and lows from 31°F to 38°F. Normal precipitation for the month is 0.77 in over about 5 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 68°F
- Average low
- 35°F
- Precipitation
- 0.77 in
- Snowfall
- 1.1 in
- Record high
- 93°FMay 27, 1896
- Record low
- 14°FMay 6, 1975
- Chance of a freeze
- 100%
- Daylight
- 13 h 38 min to 14 h 21 min
- Cloud cover
- 38%
- Humidity
- 38%
- Dew point
- 29°F
- Wind
- 10.1 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| May 1 | 63°F | 31°F | 78°F 1943 | 17°F 1967 | 15% | 5% |
| May 2 | 63°F | 32°F | 80°F 1943 | 19°F 1972 | 15% | 5% |
| May 3 | 63°F | 32°F | 77°F 1989 | 19°F 1942 | 15% | 5% |
| May 4 | 64°F | 32°F | 78°F 1989 | 19°F 2001 | 15% | 5% |
| May 5 | 64°F | 32°F | 79°F 1989 | 18°F 1950 | 15% | 4% |
| May 6 | 64°F | 33°F | 81°F 1989 | 14°F 1975 | 14% | 4% |
| May 7 | 65°F | 33°F | 81°F 1989 | 15°F 1938 | 14% | 4% |
| May 8 | 65°F | 33°F | 85°F 1989 | 17°F 1965 | 14% | 4% |
| May 9 | 65°F | 33°F | 81°F 1934 | 14°F 1930 | 14% | 4% |
| May 10 | 66°F | 33°F | 82°F 1934 | 19°F 1953 | 14% | 4% |
| May 11 | 66°F | 34°F | 86°F 1996 | 16°F 1933 | 14% | 4% |
| May 12 | 66°F | 34°F | 86°F 1996 | 20°F 1953 | 14% | 3% |
| May 13 | 67°F | 34°F | 82°F 1984 | 18°F 1953 | 14% | 3% |
| May 14 | 67°F | 34°F | 83°F 1938 | 21°F 1942 | 14% | 3% |
| May 15 | 68°F | 34°F | 81°F 1937 | 20°F 1942 | 14% | 3% |
| May 16 | 68°F | 35°F | 80°F 1970 | 16°F 1955 | 14% | 3% |
| May 17 | 68°F | 35°F | 82°F 1970 | 20°F 1943 | 14% | 3% |
| May 18 | 69°F | 35°F | 82°F 1970 | 20°F 1943 | 14% | 3% |
| May 19 | 69°F | 35°F | 85°F 2008 | 20°F 1971 | 14% | 3% |
| May 20 | 70°F | 35°F | 84°F 2008 | 20°F 1960 | 13% | 2% |
| May 21 | 70°F | 36°F | 82°F 2005 | 21°F 1974 | 13% | 2% |
| May 22 | 70°F | 36°F | 85°F 1984 | 21°F 1972 | 13% | 2% |
| May 23 | 71°F | 36°F | 85°F 1984 | 22°F 2021 | 13% | 2% |
| May 24 | 71°F | 36°F | 84°F 1896 | 24°F 2019 | 12% | 2% |
| May 25 | 72°F | 37°F | 85°F 1896 | 18°F 1980 | 12% | 2% |
| May 26 | 72°F | 37°F | 90°F 1896 | 24°F 1972 | 12% | 2% |
| May 27 | 72°F | 37°F | 93°F 1896 | 25°F 2012 | 12% | 1% |
| May 28 | 73°F | 37°F | 92°F 1896 | 24°F 1929 | 12% | 1% |
| May 29 | 73°F | 37°F | 87°F 1896 | 25°F 1929 | 11% | 1% |
| May 30 | 74°F | 38°F | 90°F 1896 | 22°F 1953 | 11% | 1% |
| May 31 | 74°F | 38°F | 89°F 2002 | 23°F 1988 | 11% | 1% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- May 1
- sunrise 5:35 AM, sunset 7:13 PM
- May 31
- sunrise 5:14 AM, sunset 7:35 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00003103 (Flagstaff Pulliam AP), public domain. Records: NOAA GHCN-Daily, station USW00003103, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.