July weather in St. Marys, WV
The average temperature in St. Marys in July is 74.0°F (63.7°F–84.3°F). Average precipitation: 4.86 inches.
July is a summer month in St. Marys, and is warmer than the annual average of 53.1°F. Daily temperatures swing about 20.6°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 14h 31m. For travel, July is a comfortable month to visit.
Avg High
84.3°F
Avg Low
63.7°F
Precipitation
4.86 in
Daylight
14h 31m
July records in St. Marys
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| July 1 | 93.0°F (1991) | 44.1°F (1988) | 1.21 in (1990) |
| July 2 | 93.0°F (2018) | 45.0°F (1988) | 1.08 in (2001) |
| July 3 | 91.9°F (2006) | 50.0°F (1988) | 0.97 in (2006) |
| July 4 | 91.9°F (2012) | 48.9°F (1996) | 0.93 in (2008) |
| July 5 | 95.0°F (1999) | 50.0°F (2014) | 1.39 in (2006) |
| July 6 | 95.0°F (1999) | 52.0°F (2006) | 0.98 in (1992) |
| July 7 | 96.1°F (1988) | 52.0°F (2001) | 1.98 in (2019) |
| July 8 | 100.9°F (1988) | 52.0°F (2000) | 0.85 in (2017) |
| July 9 | 100.0°F (1988) | 54.0°F (1995) | 1.48 in (2008) |
| July 10 | 100.9°F (1988) | 55.0°F (1996) | 1.49 in (2002) |
| July 11 | 93.0°F (1988) | 50.0°F (1996) | 1.82 in (2013) |
| July 12 | 91.9°F (1993) | 50.0°F (1996) | 1.91 in (2019) |
| July 13 | 90.0°F (1995) | 55.0°F (2001) | 4.70 in (2010) |
| July 14 | 91.9°F (1995) | 50.0°F (2009) | 1.00 in (2010) |
| July 15 | 91.9°F (1988) | 54.0°F (2009) | 1.08 in (1990) |
| July 16 | 100.0°F (1988) | 54.0°F (2001) | 0.81 in (2000) |
| July 17 | 104.0°F (1988) | 55.9°F (1989) | 0.88 in (2021) |
| July 18 | 97.0°F (1999) | 55.0°F (2009) | 0.70 in (2019) |
| July 19 | 98.1°F (1988) | 55.0°F (2009) | 2.05 in (1988) |
| July 20 | 96.1°F (2020) | 55.0°F (1997) | 1.14 in (2000) |
| July 21 | 93.0°F (1991) | 53.1°F (2007) | 1.93 in (1988) |
| July 22 | 93.9°F (1991) | 53.1°F (2007) | 1.10 in (2017) |
| July 23 | 96.1°F (1991) | 53.1°F (2007) | 1.18 in (2017) |
| July 24 | 98.1°F (1991) | 55.9°F (2019) | 1.28 in (1991) |
| July 25 | 97.0°F (1999) | 54.0°F (2013) | 0.72 in (2023) |
| July 26 | 97.0°F (1999) | 57.0°F (2013) | 1.44 in (2009) |
| July 27 | 96.1°F (2012) | 57.0°F (2013) | 1.28 in (2012) |
| July 28 | 95.0°F (1999) | 55.9°F (1991) | 1.67 in (2017) |
| July 29 | 95.0°F (1993) | 53.1°F (2013) | 1.25 in (2016) |
| July 30 | 93.9°F (1999) | 53.1°F (2014) | 1.40 in (2011) |
| July 31 | 98.1°F (1999) | 53.1°F (1997) | 1.68 in (2020) |