May weather in Grafton, WV
The average temperature in Grafton in May is 60.1°F (48.8°F–71.5°F). Average precipitation: 4.88 inches.
May is a spring month in Grafton, and is warmer than the annual average of 51.5°F. Daily temperatures swing about 22.7°F between overnight low and afternoon high. Expect about 15 days with precipitation. Daylight averages about 14h 10m. For travel, May is a comfortable month to visit.
Avg High
71.5°F
Avg Low
48.8°F
Precipitation
4.88 in
Daylight
14h 10m
May records in Grafton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 86.0°F (2017) | 28.0°F (2004) | 0.66 in (2003) |
| May 2 | 87.1°F (2019) | 32.0°F (2021) | 0.97 in (2017) |
| May 3 | 87.1°F (2019) | 34.0°F (2005) | 1.41 in (2010) |
| May 4 | 84.9°F (2001) | 30.9°F (2004) | 1.63 in (2009) |
| May 5 | 90.0°F (2001) | 32.0°F (2004) | 0.76 in (2001) |
| May 6 | 80.1°F (2010) | 32.0°F (2004) | 0.95 in (2017) |
| May 7 | 82.9°F (2015) | 32.0°F (2004) | 1.98 in (2022) |
| May 8 | 86.0°F (2015) | 34.0°F (2007) | 0.88 in (2013) |
| May 9 | 87.1°F (2015) | 28.0°F (2020) | 0.72 in (2020) |
| May 10 | 86.0°F (2015) | 28.0°F (2020) | 0.81 in (2003) |
| May 11 | 86.0°F (2015) | 28.0°F (2020) | 0.68 in (2003) |
| May 12 | 86.0°F (2015) | 33.1°F (2021) | 1.10 in (2019) |
| May 13 | 84.0°F (2018) | 30.9°F (2020) | 0.82 in (2025) |
| May 14 | 86.0°F (2014) | 30.9°F (2013) | 1.09 in (2014) |
| May 15 | 84.9°F (2018) | 33.1°F (2013) | 0.94 in (2005) |
| May 16 | 86.0°F (2018) | 36.0°F (2016) | 1.62 in (2014) |
| May 17 | 81.0°F (2017) | 37.0°F (2016) | 0.88 in (2007) |
| May 18 | 84.9°F (2017) | 32.0°F (2009) | 1.15 in (2002) |
| May 19 | 84.0°F (2020) | 30.9°F (2009) | 1.35 in (2004) |
| May 20 | 87.1°F (2021) | 30.9°F (2002) | 1.69 in (2005) |
| May 21 | 86.0°F (2021) | 35.1°F (2002) | 0.86 in (1949) |
| May 22 | 87.1°F (2022) | 28.9°F (2002) | 1.38 in (2004) |
| May 23 | 84.9°F (2019) | 30.0°F (2002) | 0.67 in (2001) |
| May 24 | 84.9°F (2009) | 36.0°F (2006) | 0.93 in (2003) |
| May 25 | 82.0°F (2007) | 32.0°F (2013) | 1.33 in (2017) |
| May 26 | 90.0°F (2020) | 33.1°F (2013) | 1.79 in (2024) |
| May 27 | 90.0°F (2020) | 37.9°F (2013) | 1.63 in (2009) |
| May 28 | 87.1°F (2012) | 42.1°F (2013) | 1.82 in (2025) |
| May 29 | 87.1°F (2012) | 39.9°F (2008) | 2.55 in (2021) |
| May 30 | 88.0°F (2018) | 41.0°F (2008) | 0.29 in (2012) |
| May 31 | 89.1°F (2006) | 37.0°F (2001) | 1.32 in (2025) |