Mammoth Weather in January
Average highs run from 58°F on January 1 to 62°F on January 31, and lows from 37°F to 39°F. Normal precipitation for the month is 1.12 in over about 5 wet days.
January day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 60°F
- Average low
- 38°F
- Precipitation
- 1.12 in
- Snowfall
- 0.3 in
- Record high
- 82°FJan 20, 1971
- Record low
- 12°FJan 5, 1971
- Chance of a freeze
- 82%
- Daylight
- 10 h 03 min to 10 h 37 min
- Cloud cover
- 39%
- Humidity
- 51%
- Dew point
- 26°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 |
|---|---|---|---|---|---|---|
| Jan 1 | 58°F | 37°F | 73°F 2012 | 19°F 1976 | 16% | 1% |
| Jan 2 | 59°F | 37°F | 70°F 1964 | 19°F 1960 | 16% | 1% |
| Jan 3 | 59°F | 37°F | 73°F 2025 | 19°F 1960 | 16% | 1% |
| Jan 4 | 59°F | 37°F | 71°F 1956 | 16°F 1971 | 16% | 1% |
| Jan 5 | 59°F | 37°F | 70°F 1956 | 12°F 1971 | 16% | 1% |
| Jan 6 | 59°F | 37°F | 70°F 1956 | 12°F 1971 | 16% | 1% |
| Jan 7 | 59°F | 37°F | 73°F 1956 | 12°F 1971 | 16% | 1% |
| Jan 8 | 59°F | 37°F | 77°F 1969 | 15°F 1971 | 16% | 1% |
| Jan 9 | 59°F | 37°F | 70°F 1956 | 17°F 1967 | 16% | 1% |
| Jan 10 | 59°F | 37°F | 73°F 1956 | 20°F 1962 | 16% | 1% |
| Jan 11 | 60°F | 37°F | 73°F 1956 | 12°F 1962 | 16% | 1% |
| Jan 12 | 60°F | 38°F | 71°F 1956 | 14°F 1962 | 16% | 1% |
| Jan 13 | 60°F | 38°F | 71°F 1969 | 16°F 1963 | 16% | 1% |
| Jan 14 | 60°F | 38°F | 70°F 1957 | 17°F 1963 | 16% | 1% |
| Jan 15 | 60°F | 38°F | 72°F 1971 | 20°F 1962 | 15% | 1% |
| Jan 16 | 60°F | 38°F | 76°F 1974 | 23°F 1964 | 15% | 1% |
| Jan 17 | 60°F | 38°F | 75°F 1971 | 24°F 1960 | 15% | 1% |
| Jan 18 | 61°F | 38°F | 81°F 1971 | 18°F 1960 | 15% | 1% |
| Jan 19 | 61°F | 38°F | 79°F 1971 | 24°F 1960 | 15% | 1% |
| Jan 20 | 61°F | 38°F | 82°F 1971 | 16°F 1963 | 15% | 1% |
| Jan 21 | 61°F | 38°F | 77°F 1971 | 21°F 1959 | 15% | 1% |
| Jan 22 | 61°F | 38°F | 74°F 1967 | 20°F 1966 | 15% | 1% |
| Jan 23 | 61°F | 38°F | 72°F 1970 | 23°F 1955 | 15% | 1% |
| Jan 24 | 61°F | 38°F | 75°F 1970 | 24°F 1966 | 15% | 1% |
| Jan 25 | 61°F | 38°F | 71°F 1975 | 26°F 1966 | 15% | 1% |
| Jan 26 | 61°F | 38°F | 73°F 1971 | 25°F 1965 | 15% | 1% |
| Jan 27 | 62°F | 39°F | 74°F 1971 | 24°F 1965 | 15% | 1% |
| Jan 28 | 62°F | 39°F | 75°F 1967 | 26°F 2017 | 15% | 1% |
| Jan 29 | 62°F | 39°F | 73°F 1971 | 23°F 1958 | 15% | 0% |
| Jan 30 | 62°F | 39°F | 75°F 1971 | 20°F 1969 | 15% | 0% |
| Jan 31 | 62°F | 39°F | 77°F 1963 | 25°F 1969 | 15% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- January 1
- sunrise 7:25 AM, sunset 5:28 PM
- January 31
- sunrise 7:18 AM, sunset 5:55 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.