May weather in Cortland, NY
The average temperature in Cortland in May is 54.9°F (43.7°F–66.2°F). Average precipitation: 3.51 inches.
May is a spring month in Cortland, and is warmer than the annual average of 45.2°F. Daily temperatures swing about 22.5°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 26m. For travel, May is a comfortable month to visit.
Avg High
66.2°F
Avg Low
43.7°F
Precipitation
3.51 in
Daylight
14h 26m
May records in Cortland
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 77.0°F (2024) | 26.1°F (2018) | 2.03 in (2020) |
| May 2 | 77.0°F (2018) | 33.1°F (2021) | 1.13 in (2017) |
| May 3 | 84.9°F (2018) | 36.0°F (2015) | 0.99 in (2004) |
| May 4 | 80.1°F (2012) | 30.0°F (2017) | 1.77 in (1954) |
| May 5 | 80.1°F (2015) | 30.0°F (2020) | 0.86 in (1990) |
| May 6 | 75.0°F (2013) | 28.0°F (2020) | 0.62 in (1949) |
| May 7 | 75.0°F (2013) | 25.0°F (2020) | 1.10 in (2025) |
| May 8 | 79.0°F (2015) | 27.0°F (2020) | 1.10 in (1958) |
| May 9 | 87.1°F (2015) | 25.0°F (2020) | 1.12 in (1969) |
| May 10 | 82.9°F (2015) | 27.0°F (2020) | 1.01 in (1961) |
| May 11 | 86.0°F (2015) | 30.0°F (2021) | 1.85 in (1996) |
| May 12 | 82.9°F (2015) | 30.0°F (2020) | 2.29 in (1995) |
| May 13 | 86.0°F (2022) | 21.9°F (2020) | 1.05 in (1966) |
| May 14 | 84.0°F (2014) | 24.1°F (2013) | 1.87 in (2002) |
| May 15 | 80.1°F (2014) | 30.9°F (2023) | 0.37 in (1957) |
| May 16 | 80.1°F (2020) | 32.0°F (2016) | 1.35 in (2011) |
| May 17 | 81.0°F (2025) | 33.1°F (2012) | 0.83 in (1974) |
| May 18 | 87.1°F (2017) | 26.1°F (2023) | 0.67 in (1991) |
| May 19 | 88.0°F (2017) | 30.0°F (2016) | 0.98 in (2015) |
| May 20 | 86.0°F (2019) | 32.0°F (2014) | 1.71 in (1976) |
| May 21 | 87.1°F (2021) | 34.0°F (2020) | 1.53 in (1986) |
| May 22 | 89.1°F (2022) | 34.0°F (2019) | 0.65 in (2013) |
| May 23 | 84.9°F (2013) | 28.0°F (2015) | 0.88 in (1987) |
| May 24 | 79.0°F (2020) | 36.0°F (2015) | 1.13 in (2004) |
| May 25 | 80.1°F (2024) | 32.0°F (2023) | 0.81 in (1952) |
| May 26 | 82.9°F (2015) | 30.9°F (2023) | 1.05 in (1963) |
| May 27 | 89.1°F (2020) | 30.0°F (2013) | 0.72 in (2009) |
| May 28 | 84.9°F (2016) | 43.0°F (2013) | 0.83 in (2011) |
| May 29 | 89.1°F (2016) | 43.0°F (2021) | 1.70 in (2018) |
| May 30 | 88.0°F (2023) | 35.1°F (2024) | 0.57 in (2017) |
| May 31 | 86.0°F (2022) | 35.1°F (2024) | 1.06 in (1992) |