May weather in Rancho Santa Margarita, CA
The average temperature in Rancho Santa Margarita in May is 67.4°F (55.5°F–79.4°F). Average precipitation: 0.34 inches.
May is a spring month in Rancho Santa Margarita, and is warmer than the annual average of 66.7°F. Daily temperatures swing about 23.9°F between overnight low and afternoon high. Expect about 2 days with precipitation. Daylight averages about 13h 45m. For travel, May is one of the best months of the year to visit.
Avg High
79.4°F
Avg Low
55.5°F
Precipitation
0.34 in
Daylight
13h 45m
May records in Rancho Santa Margarita
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 96.1°F (2004) | 44.1°F (2011) | 0.19 in (2012) |
| May 2 | 99.0°F (2014) | 46.9°F (2008) | 0.17 in (2018) |
| May 3 | 106.0°F (2004) | 48.9°F (2010) | 0.11 in (2025) |
| May 4 | 100.9°F (2004) | 48.0°F (2023) | 1.10 in (2023) |
| May 5 | 93.9°F (2004) | 46.9°F (2010) | 0.17 in (2024) |
| May 6 | 97.0°F (2020) | 46.9°F (2012) | 0.55 in (2005) |
| May 7 | 96.1°F (2007) | 48.9°F (2010) | 0.26 in (2005) |
| May 8 | 99.0°F (2007) | 46.0°F (2023) | 0.76 in (2015) |
| May 9 | 95.0°F (2007) | 45.0°F (2010) | 0.00 in (2004) |
| May 10 | 96.1°F (2025) | 46.9°F (2011) | 0.00 in (2004) |
| May 11 | 91.0°F (2025) | 44.1°F (2010) | 0.00 in (2004) |
| May 12 | 95.0°F (2014) | 43.0°F (2010) | 0.11 in (2008) |
| May 13 | 99.0°F (2013) | 48.9°F (2007) | 0.00 in (2004) |
| May 14 | 102.0°F (2014) | 46.9°F (2007) | 0.47 in (2015) |
| May 15 | 104.0°F (2014) | 44.1°F (2011) | 0.27 in (2011) |
| May 16 | 102.0°F (2014) | 46.0°F (2011) | 0.42 in (2019) |
| May 17 | 100.0°F (2008) | 46.0°F (2011) | 0.00 in (2004) |
| May 18 | 99.0°F (2008) | 46.9°F (2017) | 0.30 in (2011) |
| May 19 | 95.0°F (2008) | 48.9°F (2017) | 0.40 in (2019) |
| May 20 | 95.0°F (2017) | 48.0°F (2010) | 0.00 in (2004) |
| May 21 | 91.0°F (2005) | 48.0°F (2010) | 0.22 in (2018) |
| May 22 | 93.0°F (2017) | 46.0°F (2007) | 0.54 in (2006) |
| May 23 | 88.0°F (2020) | 48.9°F (2010) | 0.15 in (2018) |
| May 24 | 87.1°F (2020) | 46.0°F (2011) | 0.18 in (2023) |
| May 25 | 88.0°F (2020) | 44.1°F (2010) | 0.00 in (2004) |
| May 26 | 90.0°F (2020) | 46.9°F (2008) | 0.00 in (2004) |
| May 27 | 87.1°F (2020) | 45.0°F (2012) | 0.00 in (2004) |
| May 28 | 84.0°F (2014) | 46.9°F (2012) | 0.00 in (2004) |
| May 29 | 87.1°F (2010) | 46.9°F (2012) | 0.14 in (2023) |
| May 30 | 97.0°F (2025) | 46.9°F (2010) | 0.00 in (2004) |
| May 31 | 98.1°F (2025) | 46.9°F (2011) | 0.13 in (2018) |