May weather in Casselton, ND
The average temperature in Casselton in May is 55.4°F (43.2°F–67.6°F). Average precipitation: 3.16 inches.
May is a spring month in Casselton, and is warmer than the annual average of 41.1°F. Daily temperatures swing about 24.4°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 14h 51m. For travel, May is a comfortable month to visit.
Avg High
67.6°F
Avg Low
43.2°F
Precipitation
3.16 in
Daylight
14h 51m
May records in Casselton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 95.0°F (1992) | 25.0°F (1990) | 0.60 in (2006) |
| May 2 | 86.0°F (2021) | 21.9°F (2002) | 0.38 in (2008) |
| May 3 | 86.0°F (2015) | 19.0°F (2005) | 0.36 in (1994) |
| May 4 | 84.9°F (2000) | 26.1°F (2021) | 1.22 in (1991) |
| May 5 | 91.9°F (1985) | 26.1°F (1989) | 1.18 in (2007) |
| May 6 | 95.0°F (2000) | 23.0°F (1989) | 1.10 in (2007) |
| May 7 | 89.1°F (1992) | 25.0°F (2019) | 1.81 in (2001) |
| May 8 | 91.9°F (1992) | 28.0°F (2020) | 0.80 in (2010) |
| May 9 | 91.0°F (1985) | 28.0°F (1997) | 1.05 in (2011) |
| May 10 | 97.0°F (1987) | 23.0°F (1990) | 1.80 in (1985) |
| May 11 | 84.9°F (1985) | 25.0°F (2020) | 1.19 in (2015) |
| May 12 | 95.0°F (2025) | 25.0°F (2013) | 1.40 in (2004) |
| May 13 | 93.0°F (2025) | 25.0°F (1988) | 0.68 in (2009) |
| May 14 | 93.0°F (2013) | 25.0°F (2016) | 1.25 in (2015) |
| May 15 | 93.0°F (1991) | 28.9°F (2016) | 0.73 in (1985) |
| May 16 | 93.9°F (1987) | 30.9°F (1988) | 1.60 in (1998) |
| May 17 | 91.9°F (2012) | 28.0°F (2002) | 0.85 in (2015) |
| May 18 | 93.9°F (2012) | 27.0°F (1990) | 2.17 in (2015) |
| May 19 | 93.9°F (1988) | 30.9°F (2002) | 1.05 in (2003) |
| May 20 | 93.9°F (1992) | 30.0°F (2002) | 0.54 in (2025) |
| May 21 | 89.1°F (1992) | 32.0°F (1997) | 1.62 in (2005) |
| May 22 | 90.0°F (2012) | 35.1°F (1986) | 0.88 in (1992) |
| May 23 | 88.0°F (1991) | 24.1°F (1992) | 0.60 in (1997) |
| May 24 | 88.0°F (2006) | 26.1°F (2002) | 1.95 in (2024) |
| May 25 | 91.0°F (2018) | 36.0°F (2002) | 0.72 in (2024) |
| May 26 | 93.0°F (2018) | 34.0°F (1984) | 1.31 in (1987) |
| May 27 | 93.9°F (2018) | 34.0°F (1984) | 0.70 in (1993) |
| May 28 | 91.9°F (2006) | 30.9°F (2021) | 0.63 in (2011) |
| May 29 | 95.0°F (2006) | 39.0°F (1993) | 0.85 in (2015) |
| May 30 | 90.0°F (1988) | 34.0°F (2015) | 2.05 in (2013) |
| May 31 | 91.9°F (1984) | 36.0°F (2015) | 1.75 in (2004) |