April weather in Union City, CA
The average temperature in Union City in April is 58.0°F (48.3°F–67.7°F). Average precipitation: 1.22 inches.
April is a spring month in Union City, and is cooler than the annual average of 59.5°F. Daily temperatures swing about 19.4°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 12h 59m. For travel, April is a comfortable month to visit.
Avg High
67.7°F
Avg Low
48.3°F
Precipitation
1.22 in
Daylight
12h 59m
April records in Union City
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| April 1 | 84.0°F (2000) | 36.0°F (2023) | 0.35 in (2025) |
| April 2 | 87.1°F (2000) | 37.9°F (2025) | 0.20 in (2014) |
| April 3 | 79.0°F (1997) | 37.9°F (2001) | 0.50 in (2006) |
| April 4 | 79.0°F (2026) | 39.0°F (2009) | 0.65 in (2006) |
| April 5 | 82.0°F (2026) | 37.0°F (2012) | 0.98 in (2020) |
| April 6 | 87.1°F (2016) | 37.9°F (2012) | 0.48 in (2018) |
| April 7 | 84.9°F (2022) | 37.0°F (2020) | 1.16 in (2018) |
| April 8 | 84.9°F (2022) | 39.9°F (2001) | 0.46 in (1999) |
| April 9 | 79.0°F (2014) | 34.0°F (1999) | 0.58 in (2016) |
| April 10 | 80.1°F (2004) | 39.9°F (2001) | 0.51 in (2016) |
| April 11 | 81.0°F (2008) | 41.0°F (2021) | 0.70 in (2010) |
| April 12 | 84.0°F (2000) | 36.0°F (2022) | 0.74 in (2026) |
| April 13 | 84.0°F (2008) | 37.0°F (2023) | 0.96 in (2003) |
| April 14 | 84.9°F (1999) | 39.9°F (2005) | 0.21 in (2007) |
| April 15 | 86.0°F (1999) | 39.9°F (1998) | 0.04 in (2006) |
| April 16 | 89.1°F (1999) | 39.9°F (2013) | 0.47 in (2006) |
| April 17 | 84.0°F (1999) | 39.0°F (2022) | 0.29 in (2000) |
| April 18 | 86.0°F (2016) | 39.0°F (2022) | 0.18 in (2017) |
| April 19 | 87.1°F (2009) | 41.0°F (2018) | 0.25 in (1997) |
| April 20 | 91.0°F (2009) | 41.0°F (2023) | 0.53 in (2010) |
| April 21 | 90.0°F (2009) | 39.9°F (2001) | 0.28 in (2022) |
| April 22 | 88.0°F (2009) | 44.1°F (2004) | 0.38 in (2007) |
| April 23 | 86.0°F (2019) | 45.0°F (2001) | 0.13 in (2008) |
| April 24 | 84.9°F (2019) | 39.9°F (2008) | 0.19 in (2003) |
| April 25 | 89.1°F (2004) | 43.0°F (2023) | 0.45 in (2015) |
| April 26 | 91.0°F (2004) | 42.1°F (2025) | 0.14 in (2012) |
| April 27 | 90.0°F (2004) | 42.1°F (2003) | 0.08 in (2016) |
| April 28 | 84.0°F (2007) | 42.1°F (1999) | 0.53 in (2003) |
| April 29 | 84.9°F (2014) | 39.9°F (2011) | 0.08 in (2003) |
| April 30 | 90.0°F (2014) | 43.0°F (2002) | 0.03 in (2003) |