May weather in San Luis Obispo, CA
The average temperature in San Luis Obispo in May is 59.9°F (47.8°F–72.0°F). Average precipitation: 0.47 inches.
May is a spring month in San Luis Obispo, and is warmer than the annual average of 59.7°F. Daily temperatures swing about 24.2°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 13h 51m. For travel, May is a comfortable month to visit.
Avg High
72.0°F
Avg Low
47.8°F
Precipitation
0.47 in
Daylight
13h 51m
May records in San Luis Obispo
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 93.0°F (2014) | 41.0°F (1999) | 0.13 in (1998) |
| May 2 | 99.0°F (2004) | 14.2°F (2018) | 0.73 in (2003) |
| May 3 | 98.1°F (2013) | 42.1°F (2008) | 0.35 in (2003) |
| May 4 | 91.9°F (2011) | 39.9°F (2001) | 0.32 in (1998) |
| May 5 | 82.0°F (2011) | 39.9°F (2001) | 0.99 in (2005) |
| May 6 | 89.1°F (2020) | 41.0°F (1999) | 0.11 in (2013) |
| May 7 | 91.9°F (2007) | 45.0°F (2000) | 0.27 in (2017) |
| May 8 | 96.1°F (2007) | 42.1°F (2002) | 0.19 in (2005) |
| May 9 | 89.1°F (2025) | 37.0°F (2003) | 0.21 in (2005) |
| May 10 | 87.1°F (2025) | 37.9°F (2002) | 0.01 in (2019) |
| May 11 | 82.9°F (2013) | 37.9°F (2002) | 0.01 in (2006) |
| May 12 | 89.1°F (2014) | 39.9°F (2000) | 0.66 in (1998) |
| May 13 | 95.0°F (2014) | 39.0°F (2000) | 0.02 in (1998) |
| May 14 | 100.9°F (2014) | 37.9°F (1999) | 0.09 in (2011) |
| May 15 | 102.9°F (2014) | 35.1°F (1999) | 0.21 in (2019) |
| May 16 | 89.1°F (2008) | 39.0°F (1999) | 0.82 in (2011) |
| May 17 | 96.1°F (2008) | 41.0°F (2002) | 0.30 in (2011) |
| May 18 | 89.1°F (2008) | 39.0°F (2003) | 0.33 in (2019) |
| May 19 | 89.1°F (2003) | 43.0°F (1998) | 0.59 in (2019) |
| May 20 | 91.9°F (2003) | 39.9°F (1998) | 0.18 in (2002) |
| May 21 | 96.1°F (2000) | 39.0°F (1999) | 1.58 in (2006) |
| May 22 | 91.0°F (2000) | 41.0°F (2007) | 0.01 in (2006) |
| May 23 | 84.0°F (2001) | 37.0°F (2010) | 0.01 in (2019) |
| May 24 | 93.9°F (2001) | 42.1°F (2011) | 0.01 in (2024) |
| May 25 | 84.0°F (2020) | 41.0°F (2013) | 0.02 in (2018) |
| May 26 | 86.0°F (2020) | 41.0°F (1998) | 0.32 in (2019) |
| May 27 | 86.0°F (2003) | 39.0°F (1998) | 0.05 in (2010) |
| May 28 | 91.9°F (2003) | 43.0°F (2008) | 0.50 in (1998) |
| May 29 | 91.0°F (2002) | 43.0°F (2001) | 0.01 in (1998) |
| May 30 | 88.0°F (2010) | 39.9°F (2000) | 0.00 in (1998) |
| May 31 | 86.0°F (2004) | 39.0°F (2000) | 0.00 in (1998) |