San Luis Weather in May
Average highs run from 62°F on May 1 to 75°F on May 31, and lows from 30°F to 38°F. Normal precipitation for the month is 0.73 in over about 3 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
- 0.73 in
- Record high
- 86°FMay 31, 2002
- Record low
- 14°FMay 2, 2011
- Chance of a freeze
- 100%
- Daylight
- 13 h 44 min to 14 h 33 min
- Cloud cover
- 51%
- Humidity
- 48%
- Dew point
- 28°F
- Wind
- 8.7 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 62°F | 30°F | 75°F 1992 | 19°F 2016 | 10% |
| May 2 | 62°F | 31°F | 76°F 2001 | 14°F 2011 | 10% |
| May 3 | 62°F | 31°F | 73°F 2012 | 17°F 2008 | 10% |
| May 4 | 63°F | 31°F | 76°F 2000 | 19°F 2008 | 10% |
| May 5 | 63°F | 32°F | 77°F 2012 | 25°F 1999 | 10% |
| May 6 | 63°F | 32°F | 77°F 2012 | 23°F 1999 | 10% |
| May 7 | 64°F | 32°F | 77°F 1989 | 23°F 1999 | 10% |
| May 8 | 64°F | 33°F | 77°F 1989 | 25°F 1993 | 10% |
| May 9 | 65°F | 33°F | 77°F 2018 | 26°F 1990 | 10% |
| May 10 | 65°F | 33°F | 79°F 2018 | 28°F 2015 | 10% |
| May 11 | 66°F | 33°F | 79°F 2018 | 25°F 2006 | 10% |
| May 12 | 66°F | 34°F | 77°F 2009 | 24°F 2014 | 10% |
| May 13 | 66°F | 34°F | 79°F 1996 | 21°F 2014 | 10% |
| May 14 | 67°F | 34°F | 80°F 1996 | 21°F 2014 | 10% |
| May 15 | 67°F | 34°F | 78°F 1996 | 22°F 2014 | 10% |
| May 16 | 68°F | 35°F | 80°F 1996 | 30°F 2008 | 10% |
| May 17 | 68°F | 35°F | 81°F 1996 | 32°F 1998 | 10% |
| May 18 | 69°F | 35°F | 78°F 1991 | 22°F 2014 | 10% |
| May 19 | 69°F | 35°F | 81°F 1996 | 27°F 2017 | 10% |
| May 20 | 70°F | 36°F | 82°F 2006 | 28°F 2015 | 10% |
| May 21 | 70°F | 36°F | 84°F 2005 | 26°F 2001 | 10% |
| May 22 | 71°F | 36°F | 82°F 2005 | 28°F 1999 | 11% |
| May 23 | 71°F | 36°F | 84°F 2005 | 30°F 2017 | 11% |
| May 24 | 72°F | 37°F | 84°F 2005 | 27°F 2007 | 11% |
| May 25 | 72°F | 37°F | 83°F 2000 | 30°F 2002 | 11% |
| May 26 | 72°F | 37°F | 83°F 2006 | 22°F 1999 | 11% |
| May 27 | 73°F | 37°F | 81°F 2006 | 32°F 1999 | 11% |
| May 28 | 73°F | 37°F | 81°F 2010 | 31°F 2016 | 11% |
| May 29 | 74°F | 38°F | 85°F 2000 | 33°F 1997 | 11% |
| May 30 | 74°F | 38°F | 85°F 2000 | 32°F 1988 | 11% |
| May 31 | 75°F | 38°F | 86°F 2002 | 33°F 2007 | 11% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (MDT).
- May 1
- sunrise 6:07 AM, sunset 7:51 PM
- May 31
- sunrise 5:43 AM, sunset 8:16 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00057430 (San Luis 1 S), public domain. Records: NOAA GHCN-Daily, station USC00057572, 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.