Sierra County Weather in May
Average highs run from 62°F on May 1 to 72°F on May 31, and lows from 32°F to 38°F. Normal precipitation for the month is 1.15 in over about 6 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
- 67°F
- Average low
- 35°F
- Precipitation
- 1.15 in
- Snowfall
- 0.2 in
- Record high
- 88°FMay 28, 1984
- Record low
- 21°FMay 3, 1950
- Chance of a freeze
- 100%
- Daylight
- 13 h 53 min to 14 h 46 min
- Cloud cover
- 49%
- Humidity
- 68%
- Dew point
- 38°F
- Wind
- 4.7 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 | 62°F | 32°F | 79°F 1947 | 23°F 1964 | 18% | 1% |
| May 2 | 63°F | 32°F | 76°F 1966 | 23°F 1950 | 18% | 1% |
| May 3 | 63°F | 32°F | 77°F 1966 | 21°F 1950 | 18% | 1% |
| May 4 | 63°F | 32°F | 78°F 1990 | 23°F 1975 | 18% | 1% |
| May 5 | 64°F | 33°F | 77°F 1987 | 25°F 1975 | 18% | 1% |
| May 6 | 64°F | 33°F | 80°F 1987 | 22°F 1964 | 18% | 1% |
| May 7 | 64°F | 33°F | 77°F 2001 | 25°F 1950 | 18% | 1% |
| May 8 | 65°F | 33°F | 76°F 2020 | 24°F 1948 | 18% | 1% |
| May 9 | 65°F | 34°F | 74°F 2020 | 26°F 1953 | 18% | 1% |
| May 10 | 65°F | 34°F | 77°F 2001 | 25°F 2022 | 18% | 1% |
| May 11 | 66°F | 34°F | 77°F 1976 | 27°F 1967 | 18% | 1% |
| May 12 | 66°F | 34°F | 82°F 1976 | 28°F 1951 | 18% | 1% |
| May 13 | 66°F | 35°F | 81°F 1973 | 29°F 1968 | 18% | 1% |
| May 14 | 67°F | 35°F | 78°F 1973 | 27°F 1968 | 18% | 1% |
| May 15 | 67°F | 35°F | 79°F 2008 | 27°F 2011 | 18% | 1% |
| May 16 | 67°F | 35°F | 81°F 2008 | 27°F 2011 | 18% | 1% |
| May 17 | 67°F | 36°F | 83°F 2008 | 25°F 1974 | 18% | 1% |
| May 18 | 68°F | 36°F | 81°F 1954 | 23°F 1974 | 18% | 1% |
| May 19 | 68°F | 36°F | 81°F 2008 | 29°F 1974 | 17% | 1% |
| May 20 | 68°F | 36°F | 80°F 2001 | 27°F 1945 | 17% | 1% |
| May 21 | 69°F | 36°F | 81°F 1967 | 27°F 1960 | 17% | 1% |
| May 22 | 69°F | 37°F | 82°F 1967 | 25°F 2010 | 17% | 1% |
| May 23 | 69°F | 37°F | 82°F 2000 | 27°F 1960 | 17% | 1% |
| May 24 | 70°F | 37°F | 80°F 1983 | 27°F 1953 | 17% | 1% |
| May 25 | 70°F | 37°F | 83°F 1951 | 26°F 1953 | 16% | 1% |
| May 26 | 70°F | 37°F | 82°F 1983 | 25°F 1953 | 16% | 1% |
| May 27 | 70°F | 37°F | 86°F 1983 | 30°F 1998 | 16% | 0% |
| May 28 | 71°F | 38°F | 88°F 1984 | 30°F 1988 | 16% | 0% |
| May 29 | 71°F | 38°F | 84°F 1950 | 30°F 1988 | 15% | 0% |
| May 30 | 71°F | 38°F | 88°F 2025 | 31°F 1971 | 15% | 0% |
| May 31 | 72°F | 38°F | 86°F 1950 | 28°F 1955 | 15% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- May 1
- sunrise 6:03 AM, sunset 7:56 PM
- May 31
- sunrise 5:37 AM, sunset 8:23 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00047085 (Portola), public domain. Records: NOAA GHCN-Daily, station USW00023225, 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.