May weather in Dover, NH
The average temperature in Dover in May is 55.0°F (44.1°F–65.9°F). Average precipitation: 3.80 inches.
May is a spring month in Dover, and is warmer than the annual average of 47.1°F. Daily temperatures swing about 21.8°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 29m. For travel, May is a comfortable month to visit.
Avg High
65.9°F
Avg Low
44.1°F
Precipitation
3.80 in
Daylight
14h 29m
May records in Dover
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 80.4°F (2004) | 27.1°F (2008) | 1.02 in (2020) |
| May 2 | 88.2°F (2018) | 31.1°F (2015) | 2.15 in (2006) |
| May 3 | 82.6°F (2018) | 34.9°F (2007) | 0.76 in (2025) |
| May 4 | 83.7°F (2015) | 31.1°F (2005) | 0.63 in (2004) |
| May 5 | 79.0°F (2006) | 30.2°F (2004) | 0.89 in (2021) |
| May 6 | 78.4°F (2002) | 30.0°F (2013) | 0.54 in (2025) |
| May 7 | 82.6°F (2015) | 30.2°F (2007) | 1.07 in (2009) |
| May 8 | 83.1°F (2007) | 32.2°F (2004) | 0.66 in (2012) |
| May 9 | 84.2°F (2007) | 30.2°F (2017) | 0.72 in (2025) |
| May 10 | 87.3°F (2015) | 31.1°F (2010) | 1.03 in (2025) |
| May 11 | 82.9°F (2004) | 27.9°F (2010) | 0.48 in (2003) |
| May 12 | 83.1°F (2014) | 33.6°F (2010) | 0.49 in (2006) |
| May 13 | 81.9°F (2012) | 28.8°F (2005) | 4.96 in (2006) |
| May 14 | 87.4°F (2022) | 30.6°F (2020) | 1.92 in (2017) |
| May 15 | 88.7°F (2004) | 31.3°F (2013) | 1.18 in (2011) |
| May 16 | 78.1°F (2013) | 34.5°F (2002) | 1.30 in (2007) |
| May 17 | 90.3°F (2017) | 33.6°F (2023) | 0.88 in (2014) |
| May 18 | 91.4°F (2017) | 28.2°F (2023) | 1.09 in (2011) |
| May 19 | 84.2°F (2017) | 32.9°F (2002) | 1.49 in (2010) |
| May 20 | 82.6°F (2003) | 28.2°F (2002) | 1.68 in (2023) |
| May 21 | 88.7°F (2009) | 34.7°F (2002) | 0.59 in (2005) |
| May 22 | 89.1°F (2024) | 32.7°F (2002) | 1.00 in (2013) |
| May 23 | 85.1°F (2021) | 37.4°F (2015) | 0.71 in (2005) |
| May 24 | 87.6°F (2007) | 37.2°F (2020) | 1.56 in (2013) |
| May 25 | 90.9°F (2007) | 38.8°F (2013) | 0.78 in (2013) |
| May 26 | 92.1°F (2010) | 35.1°F (2009) | 1.42 in (2017) |
| May 27 | 88.3°F (2015) | 37.0°F (2013) | 0.58 in (2009) |
| May 28 | 89.8°F (2016) | 37.8°F (2013) | 0.81 in (2019) |
| May 29 | 86.0°F (2018) | 37.0°F (2014) | 0.64 in (2021) |
| May 30 | 87.1°F (2011) | 38.7°F (2023) | 0.94 in (2021) |
| May 31 | 91.8°F (2013) | 37.8°F (2004) | 0.54 in (2015) |