May weather in Portland, TN
The average temperature in Portland in May is 67.2°F (56.6°F–77.7°F). Average precipitation: 5.80 inches.
May is a spring month in Portland, and is warmer than the annual average of 58.3°F. Daily temperatures swing about 21.1°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 13h 57m. For travel, May is a wet month.
Avg High
77.7°F
Avg Low
56.6°F
Precipitation
5.80 in
Daylight
13h 57m
May records in Portland
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 89.1°F (2017) | 28.9°F (1963) | 1.58 in (2002) |
| May 2 | 88.0°F (1959) | 34.0°F (1963) | 1.90 in (2009) |
| May 3 | 88.0°F (1986) | 35.1°F (1971) | 2.70 in (2008) |
| May 4 | 88.0°F (1959) | 30.0°F (1971) | 2.26 in (1993) |
| May 5 | 90.0°F (1959) | 36.0°F (1957) | 2.15 in (1999) |
| May 6 | 87.1°F (1959) | 33.1°F (1968) | 3.19 in (1984) |
| May 7 | 87.1°F (2014) | 32.0°F (2021) | 2.60 in (1996) |
| May 8 | 89.1°F (1986) | 39.0°F (1960) | 3.55 in (1972) |
| May 9 | 88.0°F (1963) | 32.0°F (2020) | 6.23 in (2024) |
| May 10 | 88.0°F (1963) | 30.9°F (1966) | 2.67 in (1998) |
| May 11 | 89.1°F (1986) | 32.0°F (2020) | 3.10 in (2016) |
| May 12 | 89.1°F (1956) | 37.0°F (2021) | 2.42 in (1991) |
| May 13 | 88.0°F (1982) | 32.0°F (2021) | 1.75 in (2012) |
| May 14 | 91.0°F (1962) | 32.0°F (2021) | 1.83 in (1967) |
| May 15 | 93.9°F (1962) | 33.1°F (2021) | 3.85 in (2004) |
| May 16 | 91.9°F (2018) | 37.0°F (1997) | 0.89 in (2009) |
| May 17 | 91.9°F (1962) | 39.9°F (1973) | 2.84 in (1980) |
| May 18 | 90.0°F (1962) | 41.0°F (1970) | 2.30 in (2002) |
| May 19 | 91.9°F (1962) | 39.9°F (1976) | 2.44 in (1957) |
| May 20 | 91.0°F (1962) | 42.1°F (1976) | 2.05 in (1989) |
| May 21 | 91.9°F (1962) | 41.0°F (1981) | 1.73 in (2016) |
| May 22 | 93.0°F (1962) | 41.0°F (2002) | 4.12 in (1974) |
| May 23 | 90.0°F (1962) | 35.1°F (1963) | 1.77 in (2024) |
| May 24 | 91.0°F (1970) | 39.9°F (1963) | 1.10 in (2024) |
| May 25 | 91.9°F (1996) | 41.0°F (1976) | 1.21 in (1958) |
| May 26 | 91.0°F (1996) | 39.0°F (1979) | 1.96 in (1968) |
| May 27 | 91.0°F (2012) | 35.1°F (1961) | 2.90 in (2024) |
| May 28 | 91.9°F (1962) | 42.1°F (1961) | 2.20 in (1964) |
| May 29 | 91.0°F (1962) | 43.0°F (1964) | 0.94 in (2021) |
| May 30 | 91.0°F (2011) | 37.9°F (1984) | 3.07 in (1992) |
| May 31 | 91.0°F (2011) | 37.9°F (2021) | 1.67 in (2004) |