March weather in Portola Valley, CA
The average temperature in Portola Valley in March is 49.8°F (41.3°F–58.4°F). Average precipitation: 6.32 inches.
March is a spring month in Portola Valley, and is cooler than the annual average of 57.1°F. Daily temperatures swing about 17.1°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 11h 45m. For travel, March is a wet month.
Avg High
58.4°F
Avg Low
41.3°F
Precipitation
6.32 in
Daylight
11h 45m
March records in Portola Valley
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| March 1 | 70.0°F (2016) | 23.0°F (2011) | 2.21 in (2018) |
| March 2 | 70.0°F (2022) | 33.1°F (2012) | 1.52 in (2009) |
| March 3 | 69.1°F (2020) | 32.0°F (2006) | 1.02 in (2010) |
| March 4 | 73.9°F (2020) | 30.0°F (2018) | 1.75 in (2009) |
| March 5 | 66.0°F (2015) | 28.9°F (2023) | 3.51 in (2016) |
| March 6 | 69.1°F (2015) | 28.9°F (2023) | 2.21 in (2019) |
| March 7 | 72.0°F (2015) | 32.0°F (2012) | 0.94 in (2002) |
| March 8 | 75.0°F (2026) | 28.0°F (2002) | 0.75 in (2000) |
| March 9 | 73.9°F (2015) | 28.0°F (2002) | 1.75 in (2023) |
| March 10 | 73.0°F (2004) | 30.9°F (1999) | 1.53 in (2023) |
| March 11 | 77.0°F (2005) | 28.9°F (2006) | 2.42 in (2016) |
| March 12 | 71.1°F (2017) | 30.9°F (1999) | 1.25 in (2025) |
| March 13 | 75.0°F (2013) | 30.9°F (2006) | 1.71 in (2016) |
| March 14 | 81.0°F (2015) | 32.0°F (2002) | 1.80 in (2016) |
| March 15 | 81.0°F (2015) | 30.0°F (2023) | 1.68 in (2003) |
| March 16 | 79.0°F (2014) | 32.0°F (2020) | 0.84 in (2011) |
| March 17 | 77.0°F (2017) | 30.9°F (2021) | 1.67 in (2012) |
| March 18 | 73.9°F (2004) | 30.0°F (2002) | 0.64 in (2002) |
| March 19 | 78.1°F (2004) | 30.0°F (2012) | 1.05 in (2011) |
| March 20 | 73.9°F (2004) | 35.1°F (2011) | 2.53 in (2011) |
| March 21 | 79.0°F (2004) | 33.1°F (2006) | 2.32 in (2023) |
| March 22 | 75.0°F (2005) | 34.0°F (2009) | 1.80 in (2018) |
| March 23 | 73.9°F (2022) | 30.9°F (2009) | 1.80 in (2005) |
| March 24 | 79.0°F (2025) | 32.0°F (2023) | 1.72 in (1998) |
| March 25 | 84.0°F (2025) | 30.0°F (2023) | 2.90 in (2006) |
| March 26 | 80.1°F (2015) | 28.9°F (2023) | 0.82 in (2004) |
| March 27 | 73.9°F (2015) | 30.9°F (2023) | 0.58 in (2007) |
| March 28 | 72.0°F (2015) | 32.0°F (1998) | 1.57 in (2005) |
| March 29 | 77.0°F (2015) | 33.1°F (1998) | 0.98 in (2023) |
| March 30 | 72.0°F (2004) | 33.1°F (1999) | 0.72 in (2010) |
| March 31 | 78.1°F (2021) | 30.0°F (2008) | 0.74 in (2014) |