May weather in Derby, CT
The average temperature in Derby in May is 58.1°F (47.2°F–69.0°F). Average precipitation: 4.04 inches.
May is a spring month in Derby, and is warmer than the annual average of 50.2°F. Daily temperatures swing about 21.8°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 14h 19m. For travel, May is a comfortable month to visit.
Avg High
69.0°F
Avg Low
47.2°F
Precipitation
4.04 in
Daylight
14h 19m
May records in Derby
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 88.0°F (2018) | 30.9°F (2012) | 1.27 in (2023) |
| May 2 | 68.0°F (2011) | 39.9°F (2016) | 3.33 in (1976) |
| May 3 | 75.0°F (2017) | 36.0°F (2013) | 1.34 in (1985) |
| May 4 | 75.0°F (2015) | 19.0°F (2013) | 1.69 in (1984) |
| May 5 | 81.0°F (2015) | 37.9°F (2017) | 1.45 in (1990) |
| May 6 | 79.0°F (2015) | 34.0°F (2011) | 2.85 in (2025) |
| May 7 | 75.9°F (2015) | 41.0°F (2014) | 2.56 in (1991) |
| May 8 | 80.1°F (2015) | 37.9°F (2017) | 1.30 in (2012) |
| May 9 | 84.0°F (2015) | 35.1°F (2011) | 1.35 in (1978) |
| May 10 | 75.0°F (2018) | 35.1°F (2013) | 2.17 in (1989) |
| May 11 | 82.9°F (2015) | 36.0°F (2017) | 1.10 in (1998) |
| May 12 | 87.1°F (2015) | 37.9°F (2012) | 1.66 in (1968) |
| May 13 | 84.9°F (2015) | 35.1°F (2013) | 3.60 in (2006) |
| May 14 | 81.0°F (2012) | 35.1°F (2013) | 1.87 in (2002) |
| May 15 | 81.0°F (2012) | 34.0°F (2013) | 1.90 in (1978) |
| May 16 | 78.1°F (2013) | 36.0°F (2013) | 2.45 in (1989) |
| May 17 | 82.0°F (2013) | 43.0°F (2015) | 1.50 in (2007) |
| May 18 | 88.0°F (2017) | 42.1°F (2014) | 1.12 in (1991) |
| May 19 | 71.1°F (2013) | 42.1°F (2012) | 3.50 in (2011) |
| May 20 | 80.1°F (2012) | 43.0°F (2014) | 1.47 in (1966) |
| May 21 | 82.0°F (2018) | 42.1°F (2014) | 2.55 in (2023) |
| May 22 | 87.1°F (2013) | 46.0°F (2015) | 1.06 in (1980) |
| May 23 | 75.9°F (2013) | 46.0°F (2015) | 2.78 in (1989) |
| May 24 | 80.1°F (2018) | 43.0°F (2015) | 1.55 in (1979) |
| May 25 | 81.0°F (2018) | 43.0°F (2013) | 1.95 in (1978) |
| May 26 | 86.0°F (2018) | 43.0°F (2013) | 1.30 in (2017) |
| May 27 | 89.1°F (2018) | 48.9°F (2013) | 2.19 in (2003) |
| May 28 | 82.9°F (2011) | 44.1°F (2013) | 1.04 in (2024) |
| May 29 | 90.0°F (2012) | 43.0°F (2014) | 2.32 in (1984) |
| May 30 | 88.0°F (2012) | 46.9°F (2014) | 1.90 in (1968) |
| May 31 | 89.1°F (2013) | 46.0°F (2014) | 2.53 in (1984) |