March weather in Union City, CA
The average temperature in Union City in March is 55.8°F (46.4°F–65.1°F). Average precipitation: 2.52 inches.
March is a spring month in Union City, and is cooler than the annual average of 59.5°F. Daily temperatures swing about 18.7°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 11h 45m. For travel, March is a comfortable month to visit.
Avg High
65.1°F
Avg Low
46.4°F
Precipitation
2.52 in
Daylight
11h 45m
March records in Union City
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| March 1 | 73.0°F (2026) | 33.1°F (2023) | 0.47 in (2018) |
| March 2 | 72.0°F (2016) | 32.0°F (2023) | 0.72 in (2019) |
| March 3 | 75.0°F (2020) | 37.0°F (2012) | 0.88 in (2006) |
| March 4 | 75.9°F (2020) | 36.0°F (1997) | 0.63 in (2005) |
| March 5 | 73.0°F (2020) | 34.0°F (1999) | 0.82 in (2000) |
| March 6 | 72.0°F (2005) | 34.0°F (2023) | 0.95 in (2006) |
| March 7 | 75.9°F (2015) | 35.1°F (2022) | 0.99 in (2016) |
| March 8 | 80.1°F (2004) | 36.0°F (2002) | 0.58 in (2000) |
| March 9 | 79.0°F (2004) | 37.0°F (2002) | 0.32 in (2000) |
| March 10 | 82.0°F (2004) | 35.1°F (2009) | 1.13 in (2023) |
| March 11 | 84.9°F (2005) | 35.1°F (2009) | 0.30 in (2006) |
| March 12 | 78.1°F (2007) | 37.0°F (2021) | 1.73 in (2023) |
| March 13 | 81.0°F (2004) | 36.0°F (2006) | 0.85 in (1998) |
| March 14 | 87.1°F (2015) | 37.0°F (2019) | 0.47 in (2006) |
| March 15 | 84.0°F (2004) | 39.0°F (2018) | 0.70 in (2003) |
| March 16 | 82.9°F (2004) | 36.0°F (2021) | 0.40 in (2020) |
| March 17 | 84.9°F (2026) | 36.0°F (2021) | 0.69 in (2006) |
| March 18 | 87.1°F (2026) | 37.0°F (2025) | 0.25 in (2011) |
| March 19 | 84.9°F (2026) | 37.0°F (2025) | 0.58 in (2011) |
| March 20 | 88.0°F (2026) | 39.9°F (2021) | 0.75 in (2011) |
| March 21 | 84.9°F (2026) | 37.0°F (2021) | 0.55 in (2023) |
| March 22 | 80.1°F (2022) | 39.9°F (2013) | 0.88 in (2005) |
| March 23 | 80.1°F (2022) | 36.0°F (2009) | 0.55 in (2024) |
| March 24 | 79.0°F (1997) | 37.9°F (2023) | 0.75 in (2011) |
| March 25 | 84.0°F (1997) | 34.0°F (2023) | 1.00 in (2006) |
| March 26 | 82.9°F (2015) | 34.0°F (2023) | 0.67 in (2019) |
| March 27 | 81.0°F (2026) | 34.0°F (2023) | 0.73 in (2019) |
| March 28 | 79.0°F (2026) | 37.9°F (2007) | 0.53 in (2022) |
| March 29 | 82.9°F (2026) | 37.0°F (1998) | 0.40 in (2023) |
| March 30 | 82.0°F (2018) | 39.9°F (1998) | 0.22 in (2014) |
| March 31 | 82.0°F (2000) | 37.0°F (1999) | 0.40 in (2014) |