May weather in Mount Vernon, TX
The average temperature in Mount Vernon in May is 71.8°F (61.4°F–82.2°F). Average precipitation: 5.07 inches.
May is a spring month in Mount Vernon, and is warmer than the annual average of 64.6°F. Daily temperatures swing about 20.8°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 13h 43m. For travel, May is a wet month.
Avg High
82.2°F
Avg Low
61.4°F
Precipitation
5.07 in
Daylight
13h 43m
May records in Mount Vernon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 91.0°F (1987) | 42.1°F (1984) | 2.77 in (2004) |
| May 2 | 91.9°F (2006) | 41.0°F (2014) | 2.45 in (1990) |
| May 3 | 91.9°F (2006) | 39.0°F (2013) | 3.94 in (2009) |
| May 4 | 90.0°F (2006) | 39.9°F (2011) | 2.49 in (1995) |
| May 5 | 89.1°F (2007) | 39.0°F (2013) | 1.05 in (1989) |
| May 6 | 90.0°F (2012) | 42.1°F (2025) | 1.79 in (1976) |
| May 7 | 93.0°F (2007) | 43.0°F (1992) | 3.20 in (2025) |
| May 8 | 91.9°F (2012) | 46.0°F (1992) | 2.25 in (2012) |
| May 9 | 91.0°F (2022) | 45.0°F (1969) | 2.83 in (1981) |
| May 10 | 93.0°F (2006) | 46.0°F (1997) | 1.72 in (1968) |
| May 11 | 90.0°F (2022) | 39.9°F (1981) | 3.33 in (2015) |
| May 12 | 91.0°F (1967) | 43.0°F (2008) | 1.78 in (2021) |
| May 13 | 90.0°F (1967) | 43.0°F (1971) | 2.16 in (1982) |
| May 14 | 93.0°F (2006) | 43.0°F (1971) | 1.80 in (2008) |
| May 15 | 95.0°F (2007) | 46.0°F (1967) | 2.31 in (2008) |
| May 16 | 93.0°F (2007) | 43.0°F (1983) | 1.70 in (2013) |
| May 17 | 89.1°F (1972) | 46.0°F (1983) | 3.52 in (2020) |
| May 18 | 89.1°F (1996) | 46.0°F (1976) | 3.46 in (1989) |
| May 19 | 96.1°F (1979) | 46.0°F (2002) | 3.52 in (2000) |
| May 20 | 96.1°F (2006) | 46.0°F (1981) | 1.19 in (1984) |
| May 21 | 95.0°F (2005) | 48.9°F (1981) | 2.77 in (1985) |
| May 22 | 93.0°F (2005) | 50.0°F (1967) | 2.40 in (2013) |
| May 23 | 97.0°F (2005) | 51.1°F (1967) | 1.17 in (2007) |
| May 24 | 96.1°F (2007) | 51.1°F (1983) | 1.22 in (1992) |
| May 25 | 93.0°F (2007) | 46.9°F (1979) | 1.80 in (2007) |
| May 26 | 93.0°F (2006) | 52.0°F (1979) | 1.68 in (1974) |
| May 27 | 93.9°F (2018) | 52.0°F (2022) | 1.67 in (1971) |
| May 28 | 95.0°F (1996) | 53.1°F (1976) | 1.66 in (2008) |
| May 29 | 96.1°F (2011) | 50.0°F (1984) | 0.86 in (2024) |
| May 30 | 96.1°F (2018) | 46.0°F (1984) | 2.95 in (2019) |
| May 31 | 97.0°F (1998) | 50.0°F (1984) | 3.20 in (2024) |