May weather in Plano, TX
The average temperature in Plano in May is 73.1°F (63.6°F–82.6°F). Average precipitation: 5.18 inches.
May is a spring month in Plano, and is warmer than the annual average of 65.8°F. Daily temperatures swing about 19°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 13h 42m. For travel, May is a wet month.
Avg High
82.6°F
Avg Low
63.6°F
Precipitation
5.18 in
Daylight
13h 42m
May records in Plano
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 90.0°F (1980) | 39.0°F (2021) | 2.86 in (1956) |
| May 2 | 87.1°F (2006) | 42.1°F (2013) | 3.50 in (2009) |
| May 3 | 90.0°F (2012) | 37.9°F (2013) | 3.82 in (1987) |
| May 4 | 93.0°F (1980) | 39.9°F (2021) | 3.58 in (1979) |
| May 5 | 93.9°F (1980) | 45.0°F (2013) | 2.67 in (2024) |
| May 6 | 96.1°F (1980) | 48.9°F (2013) | 2.75 in (1963) |
| May 7 | 97.0°F (2018) | 55.0°F (2013) | 5.23 in (1969) |
| May 8 | 93.0°F (2024) | 48.0°F (1980) | 1.73 in (2014) |
| May 9 | 93.9°F (2006) | 48.0°F (1980) | 2.80 in (1986) |
| May 10 | 91.0°F (2016) | 50.0°F (2019) | 5.09 in (1965) |
| May 11 | 88.0°F (1980) | 46.9°F (1979) | 1.72 in (1994) |
| May 12 | 90.0°F (2022) | 46.9°F (2008) | 3.99 in (1982) |
| May 13 | 93.0°F (2025) | 53.1°F (2021) | 1.10 in (2015) |
| May 14 | 95.0°F (2025) | 50.0°F (2011) | 4.25 in (1987) |
| May 15 | 93.0°F (2022) | 50.0°F (2011) | 1.75 in (2013) |
| May 16 | 89.1°F (1980) | 52.0°F (2011) | 5.42 in (1989) |
| May 17 | 91.9°F (2022) | 50.0°F (2011) | 2.85 in (1992) |
| May 18 | 93.0°F (2022) | 50.0°F (2009) | 3.70 in (2019) |
| May 19 | 97.0°F (2006) | 54.0°F (2009) | 4.40 in (1997) |
| May 20 | 93.9°F (1980) | 51.1°F (2023) | 1.94 in (1985) |
| May 21 | 90.0°F (2006) | 54.0°F (2015) | 2.10 in (1978) |
| May 22 | 91.0°F (2012) | 54.0°F (2013) | 1.60 in (1967) |
| May 23 | 93.9°F (2025) | 57.9°F (2022) | 2.55 in (1957) |
| May 24 | 93.9°F (2025) | 54.0°F (1979) | 2.87 in (2022) |
| May 25 | 97.0°F (1980) | 59.0°F (2017) | 1.95 in (2003) |
| May 26 | 97.0°F (2024) | 57.0°F (2022) | 2.10 in (2025) |
| May 27 | 98.1°F (1980) | 57.0°F (2022) | 2.43 in (1981) |
| May 28 | 95.0°F (2011) | 57.0°F (2009) | 3.20 in (1987) |
| May 29 | 93.0°F (2012) | 60.1°F (2009) | 3.40 in (2015) |
| May 30 | 97.0°F (2010) | 57.9°F (2009) | 2.80 in (2024) |
| May 31 | 93.0°F (2010) | 59.0°F (2015) | 2.25 in (1988) |