Mammoth Weather in May
Average highs run from 82°F on May 1 to 94°F on May 31, and lows from 55°F to 65°F. Normal precipitation for the month is 0.31 in over about 2 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
- 88°F
- Average low
- 59°F
- Precipitation
- 0.31 in
- Record high
- 105°FMay 28, 1958
- Record low
- 37°FMay 1, 1967
- Chance of a freeze
- 0%
- Days of 90°F or more
- 13.2
- Daylight
- 13 h 29 min to 14 h 09 min
- Cloud cover
- 25%
- Humidity
- 26%
- Dew point
- 29°F
- Wind
- 8.1 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 | 82°F | 55°F | 95°F 2020 | 37°F 1967 | 5% | 0% |
| May 2 | 82°F | 55°F | 93°F 2020 | 38°F 1967 | 5% | 0% |
| May 3 | 83°F | 55°F | 94°F 1956 | 40°F 1970 | 5% | 0% |
| May 4 | 83°F | 55°F | 93°F 1962 | 40°F 1959 | 5% | 0% |
| May 5 | 83°F | 56°F | 96°F 2017 | 37°F 1959 | 5% | 0% |
| May 6 | 84°F | 56°F | 98°F 2020 | 38°F 1975 | 5% | 0% |
| May 7 | 84°F | 56°F | 97°F 2020 | 39°F 1978 | 5% | 0% |
| May 8 | 84°F | 57°F | 96°F 2018 | 37°F 1965 | 5% | 0% |
| May 9 | 85°F | 57°F | 96°F 2018 | 41°F 1965 | 6% | 0% |
| May 10 | 85°F | 57°F | 97°F 2018 | 45°F 1965 | 6% | 0% |
| May 11 | 85°F | 57°F | 99°F 1960 | 47°F 1965 | 6% | 0% |
| May 12 | 86°F | 58°F | 98°F 1959 | 43°F 1957 | 6% | 0% |
| May 13 | 86°F | 58°F | 99°F 1978 | 41°F 1968 | 6% | 0% |
| May 14 | 87°F | 58°F | 98°F 1978 | 40°F 1977 | 6% | 0% |
| May 15 | 87°F | 59°F | 100°F 2022 | 47°F 1967 | 6% | 0% |
| May 16 | 88°F | 59°F | 96°F 1964 | 47°F 1962 | 6% | 0% |
| May 17 | 88°F | 59°F | 99°F 1970 | 46°F 1962 | 6% | 0% |
| May 18 | 88°F | 60°F | 101°F 1970 | 43°F 1977 | 6% | 0% |
| May 19 | 89°F | 60°F | 97°F 1970 | 44°F 1977 | 6% | 0% |
| May 20 | 89°F | 61°F | 99°F 1969 | 42°F 1974 | 6% | 0% |
| May 21 | 90°F | 61°F | 100°F 2012 | 45°F 1959 | 6% | 0% |
| May 22 | 90°F | 61°F | 101°F 2012 | 43°F 1975 | 6% | 0% |
| May 23 | 90°F | 62°F | 100°F 2012 | 45°F 1965 | 6% | 0% |
| May 24 | 91°F | 62°F | 100°F 1958 | 45°F 1965 | 6% | 0% |
| May 25 | 91°F | 62°F | 100°F 1958 | 43°F 1960 | 6% | 0% |
| May 26 | 92°F | 63°F | 102°F 1974 | 45°F 1959 | 6% | 0% |
| May 27 | 92°F | 63°F | 104°F 1974 | 43°F 1959 | 6% | 0% |
| May 28 | 93°F | 64°F | 105°F 1958 | 43°F 1959 | 6% | 0% |
| May 29 | 93°F | 64°F | 102°F 1958 | 45°F 1971 | 6% | 0% |
| May 30 | 93°F | 64°F | 103°F 1969 | 48°F 1971 | 6% | 0% |
| May 31 | 94°F | 65°F | 103°F 1977 | 50°F 1967 | 6% | 0% |
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 7:04 PM
- May 31
- sunrise 5:16 AM, sunset 7:25 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00027530 (San Manuel), public domain. Records: NOAA GHCN-Daily, station USC00027530, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.