May weather in Riverton, WY
The average temperature in Riverton in May is 53.8°F (40.3°F–67.4°F). Average precipitation: 1.98 inches. Average snowfall is 2.1 inches.
May is a spring month in Riverton, and is warmer than the annual average of 43.9°F. Daily temperatures swing about 27.1°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 14h 28m. For travel, May is a comfortable month to visit.
Avg High
67.4°F
Avg Low
40.3°F
Precipitation
1.98 in
Snow
2.1 in
May records in Riverton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 84.9°F (1987) | 15.1°F (1909) | 0.74 in (2018) |
| May 2 | 87.1°F (1947) | 19.9°F (1954) | 1.02 in (1942) |
| May 3 | 88.0°F (1947) | 19.0°F (1948) | 1.27 in (1912) |
| May 4 | 89.1°F (1947) | 21.9°F (1984) | 1.16 in (2022) |
| May 5 | 86.0°F (1966) | 19.9°F (1950) | 1.03 in (1971) |
| May 6 | 88.0°F (1934) | 15.1°F (1909) | 0.92 in (1973) |
| May 7 | 88.0°F (1934) | 23.0°F (1924) | 1.45 in (2016) |
| May 8 | 86.0°F (1966) | 24.1°F (1968) | 3.53 in (1921) |
| May 9 | 84.9°F (1987) | 19.9°F (1943) | 1.00 in (1979) |
| May 10 | 84.0°F (1940) | 21.9°F (1927) | 0.89 in (1972) |
| May 11 | 87.1°F (1940) | 19.9°F (1946) | 1.46 in (1980) |
| May 12 | 89.1°F (1962) | 21.0°F (1953) | 2.05 in (2010) |
| May 13 | 88.0°F (1960) | 25.0°F (1933) | 1.28 in (1908) |
| May 14 | 91.0°F (1936) | 23.0°F (1974) | 0.77 in (1958) |
| May 15 | 88.0°F (1984) | 26.1°F (1970) | 1.00 in (1957) |
| May 16 | 90.0°F (1987) | 25.0°F (1974) | 1.31 in (1952) |
| May 17 | 90.0°F (1948) | 24.1°F (1910) | 1.00 in (1944) |
| May 18 | 88.0°F (1937) | 27.0°F (1942) | 1.62 in (1978) |
| May 19 | 90.0°F (2009) | 25.0°F (1950) | 1.05 in (2011) |
| May 20 | 91.9°F (1954) | 25.0°F (1946) | 1.60 in (2011) |
| May 21 | 93.9°F (1954) | 28.0°F (2001) | 1.17 in (1975) |
| May 22 | 88.0°F (1958) | 27.0°F (2022) | 0.90 in (1962) |
| May 23 | 88.0°F (1967) | 27.0°F (1975) | 1.25 in (2008) |
| May 24 | 89.1°F (1967) | 28.9°F (1964) | 1.48 in (1921) |
| May 25 | 89.1°F (1988) | 28.9°F (1953) | 0.92 in (2015) |
| May 26 | 89.1°F (2006) | 26.1°F (1950) | 1.08 in (1929) |
| May 27 | 90.0°F (1919) | 28.9°F (1965) | 1.40 in (2008) |
| May 28 | 90.0°F (1969) | 28.0°F (1973) | 0.67 in (1997) |
| May 29 | 93.0°F (2003) | 25.0°F (1947) | 1.26 in (1924) |
| May 30 | 93.9°F (2003) | 30.0°F (1973) | 2.47 in (1924) |
| May 31 | 96.1°F (1984) | 28.9°F (1919) | 1.19 in (2022) |