May weather in Roy, WA
The average temperature in Roy in May is 54.4°F (44.5°F–64.3°F). Average precipitation: 2.97 inches.
May is a spring month in Roy, and is warmer than the annual average of 50.5°F. Daily temperatures swing about 19.8°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 51m. For travel, May is a comfortable month to visit.
Avg High
64.3°F
Avg Low
44.5°F
Precipitation
2.97 in
Daylight
14h 51m
May records in Roy
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 82.9°F (1976) | 26.1°F (1954) | 0.72 in (2001) |
| May 2 | 84.0°F (2014) | 30.0°F (1964) | 0.69 in (1949) |
| May 3 | 86.0°F (1945) | 30.0°F (1986) | 0.60 in (1948) |
| May 4 | 82.0°F (1944) | 28.9°F (1963) | 0.60 in (2012) |
| May 5 | 84.9°F (1953) | 30.0°F (1952) | 0.75 in (2017) |
| May 6 | 88.0°F (1953) | 32.0°F (1965) | 0.91 in (1948) |
| May 7 | 82.0°F (2013) | 30.9°F (1965) | 0.54 in (1960) |
| May 8 | 80.1°F (1987) | 32.0°F (1943) | 0.80 in (1991) |
| May 9 | 84.9°F (1987) | 32.0°F (1985) | 0.60 in (2014) |
| May 10 | 82.0°F (1987) | 34.0°F (1944) | 0.86 in (2005) |
| May 11 | 84.0°F (2020) | 30.0°F (1953) | 0.50 in (2018) |
| May 12 | 87.1°F (1971) | 30.0°F (1985) | 0.81 in (1945) |
| May 13 | 84.0°F (2019) | 32.0°F (1958) | 1.19 in (1996) |
| May 14 | 84.0°F (1973) | 30.0°F (1964) | 0.66 in (1955) |
| May 15 | 89.1°F (2023) | 30.9°F (1964) | 1.94 in (2011) |
| May 16 | 86.0°F (2023) | 35.1°F (1963) | 0.90 in (1945) |
| May 17 | 87.1°F (1985) | 32.0°F (1971) | 0.96 in (2013) |
| May 18 | 91.9°F (2008) | 33.1°F (1976) | 1.05 in (1989) |
| May 19 | 86.0°F (1956) | 34.0°F (1982) | 0.77 in (1996) |
| May 20 | 86.0°F (1961) | 34.0°F (1955) | 1.13 in (1960) |
| May 21 | 88.0°F (1963) | 34.0°F (1971) | 0.72 in (1964) |
| May 22 | 90.0°F (1963) | 37.0°F (1960) | 0.86 in (2012) |
| May 23 | 87.1°F (2001) | 30.9°F (1950) | 0.93 in (1984) |
| May 24 | 88.0°F (1969) | 0.0°F (1999) | 0.91 in (1953) |
| May 25 | 87.1°F (1992) | 30.9°F (1964) | 0.78 in (1998) |
| May 26 | 86.0°F (1947) | 36.0°F (1951) | 0.53 in (2004) |
| May 27 | 89.1°F (2005) | 34.0°F (1966) | 0.73 in (2004) |
| May 28 | 88.0°F (2005) | 30.9°F (1966) | 1.29 in (2013) |
| May 29 | 91.9°F (1983) | 33.1°F (1951) | 0.76 in (2010) |
| May 30 | 87.1°F (1983) | 33.1°F (1946) | 1.13 in (1969) |
| May 31 | 89.1°F (1956) | 32.0°F (1953) | 1.11 in (1997) |