Shasta County Weather in May
Average highs run from 67°F on May 1 to 76°F on May 31, and lows from 34°F to 40°F. Normal precipitation for the month is 1.85 in over about 8 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
- 72°F
- Average low
- 37°F
- Precipitation
- 1.85 in
- Snowfall
- 0.2 in
- Record high
- 109°FMay 31, 2021
- Record low
- 34°FMay 11, 2000
- Chance of a freeze
- 97%
- Days of 90°F or more
- 1.7
- Daylight
- 13 h 59 min to 14 h 54 min
- Cloud cover
- 53%
- Humidity
- 68%
- Dew point
- 42°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 | 67°F | 34°F | 95°F 2015 | 36°F 1988 | 29% | 3% |
| May 2 | 67°F | 34°F | 93°F 2004 | 42°F 2012 | 29% | 3% |
| May 3 | 68°F | 35°F | 95°F 1992 | 40°F 1996 | 29% | 3% |
| May 4 | 68°F | 35°F | 100°F 1992 | 36°F 1999 | 29% | 2% |
| May 5 | 69°F | 35°F | 103°F 1992 | 41°F 2003 | 28% | 2% |
| May 6 | 69°F | 35°F | 104°F 1987 | 42°F 1995 | 28% | 2% |
| May 7 | 69°F | 36°F | 101°F 1987 | 39°F 2010 | 28% | 2% |
| May 8 | 70°F | 36°F | 96°F 2001 | 40°F 2003 | 28% | 2% |
| May 9 | 70°F | 36°F | 95°F 2001 | 37°F 2022 | 27% | 2% |
| May 10 | 71°F | 36°F | 98°F 1987 | 40°F 2022 | 27% | 2% |
| May 11 | 71°F | 37°F | 101°F 1987 | 34°F 2000 | 27% | 1% |
| May 12 | 71°F | 37°F | 100°F 1996 | 39°F 1995 | 26% | 1% |
| May 13 | 72°F | 37°F | 96°F 1987 | 41°F 2017 | 26% | 1% |
| May 14 | 72°F | 37°F | 100°F 1987 | 42°F 1991 | 26% | 1% |
| May 15 | 72°F | 37°F | 103°F 2008 | 43°F 2011 | 26% | 1% |
| May 16 | 72°F | 38°F | 103°F 2008 | 44°F 1998 | 26% | 1% |
| May 17 | 73°F | 38°F | 106°F 2008 | 41°F 1998 | 25% | 1% |
| May 18 | 73°F | 38°F | 102°F 2008 | 45°F 1991 | 25% | 1% |
| May 19 | 73°F | 38°F | 99°F 2008 | 43°F 1996 | 25% | 1% |
| May 20 | 74°F | 38°F | 98°F 2001 | 39°F 2010 | 25% | 1% |
| May 21 | 74°F | 38°F | 100°F 2000 | 44°F 2010 | 25% | 1% |
| May 22 | 74°F | 38°F | 102°F 2017 | 34°F 2010 | 24% | 1% |
| May 23 | 74°F | 39°F | 101°F 2000 | 40°F 2010 | 24% | 1% |
| May 24 | 75°F | 39°F | 100°F 1994 | 40°F 1990 | 24% | 1% |
| May 25 | 75°F | 39°F | 103°F 2022 | 45°F 1989 | 23% | 1% |
| May 26 | 75°F | 39°F | 98°F 2009 | 44°F 1998 | 23% | 1% |
| May 27 | 75°F | 39°F | 100°F 2009 | 44°F 1998 | 23% | 1% |
| May 28 | 76°F | 39°F | 100°F 2009 | 45°F 2006 | 22% | 1% |
| May 29 | 76°F | 39°F | 101°F 2009 | 41°F 2011 | 22% | 0% |
| May 30 | 76°F | 39°F | 106°F 2025 | 42°F 2011 | 21% | 0% |
| May 31 | 76°F | 40°F | 109°F 2021 | 47°F 2014 | 21% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- May 1
- sunrise 6:06 AM, sunset 8:05 PM
- May 31
- sunrise 5:39 AM, sunset 8:33 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00041214 (Burney), public domain. Records: NOAA GHCN-Daily, station USW00024257, 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.