May weather in Calais, ME
The average temperature in Calais in May is 51.7°F (41.2°F–62.2°F). Average precipitation: 4.35 inches. Average snowfall is 0.2 inches.
May is a spring month in Calais, and is warmer than the annual average of 44.2°F. Daily temperatures swing about 21°F between overnight low and afternoon high. Expect about 15 days with precipitation. Daylight averages about 14h 40m. For travel, May is a comfortable month to visit.
Avg High
62.2°F
Avg Low
41.2°F
Precipitation
4.35 in
Snow
0.2 in
May records in Calais
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 80.1°F (1998) | 28.9°F (1995) | 1.06 in (2014) |
| May 2 | 84.9°F (2018) | 28.0°F (2008) | 1.25 in (2006) |
| May 3 | 75.0°F (2010) | 30.0°F (2008) | 0.71 in (2018) |
| May 4 | 82.0°F (2001) | 28.9°F (1995) | 0.68 in (1996) |
| May 5 | 71.1°F (1999) | 30.9°F (1997) | 1.11 in (2011) |
| May 6 | 75.0°F (2023) | 30.0°F (1996) | 4.12 in (2017) |
| May 7 | 77.0°F (2015) | 27.0°F (1996) | 1.38 in (2005) |
| May 8 | 82.0°F (2007) | 28.9°F (2004) | 0.72 in (2024) |
| May 9 | 77.0°F (2007) | 24.1°F (2006) | 1.36 in (2020) |
| May 10 | 71.1°F (2001) | 30.0°F (2020) | 2.37 in (2012) |
| May 11 | 78.1°F (2001) | 32.0°F (2020) | 1.56 in (2006) |
| May 12 | 81.0°F (2022) | 30.0°F (1999) | 1.35 in (2006) |
| May 13 | 80.1°F (2022) | 28.0°F (2005) | 0.34 in (2001) |
| May 14 | 88.0°F (2022) | 30.9°F (1996) | 1.15 in (2017) |
| May 15 | 82.0°F (2025) | 28.9°F (1996) | 1.23 in (2011) |
| May 16 | 75.0°F (2017) | 30.0°F (2003) | 1.43 in (2006) |
| May 17 | 75.9°F (1999) | 30.0°F (2003) | 1.44 in (2009) |
| May 18 | 91.0°F (2017) | 33.1°F (2023) | 1.61 in (2014) |
| May 19 | 82.0°F (2017) | 34.0°F (1997) | 1.87 in (2010) |
| May 20 | 81.0°F (2003) | 32.0°F (2002) | 1.26 in (2019) |
| May 21 | 90.0°F (2009) | 34.0°F (2007) | 1.63 in (2023) |
| May 22 | 89.1°F (2020) | 30.9°F (2007) | 0.93 in (2005) |
| May 23 | 79.0°F (2002) | 32.0°F (2007) | 1.44 in (2025) |
| May 24 | 89.1°F (2010) | 32.0°F (2020) | 2.24 in (2013) |
| May 25 | 82.9°F (2015) | 34.0°F (2020) | 1.69 in (2013) |
| May 26 | 88.0°F (2007) | 34.0°F (2002) | 2.33 in (2005) |
| May 27 | 81.0°F (2022) | 32.0°F (1996) | 0.33 in (2003) |
| May 28 | 91.0°F (2023) | 34.0°F (1996) | 0.83 in (2001) |
| May 29 | 87.1°F (1998) | 32.0°F (2014) | 0.43 in (2012) |
| May 30 | 84.9°F (2022) | 34.0°F (2000) | 0.84 in (2002) |
| May 31 | 91.9°F (2013) | 37.9°F (2014) | 1.36 in (2021) |