May weather in Gillette, WY
The average temperature in Gillette in May is 53.4°F (41.0°F–65.9°F). Average precipitation: 3.27 inches. Average snowfall is 1.3 inches.
May is a spring month in Gillette, and is warmer than the annual average of 46.8°F. Daily temperatures swing about 24.9°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 14h 35m. For travel, May is a comfortable month to visit.
Avg High
65.9°F
Avg Low
41.0°F
Precipitation
3.27 in
Snow
1.3 in
May records in Gillette
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 89.1°F (1981) | 12.9°F (1909) | 0.67 in (1967) |
| May 2 | 84.0°F (1947) | 14.0°F (2005) | 1.10 in (1905) |
| May 3 | 88.0°F (1952) | 10.9°F (1954) | 1.04 in (1955) |
| May 4 | 90.0°F (1909) | 16.0°F (1967) | 0.98 in (1978) |
| May 5 | 84.9°F (1966) | 19.9°F (1967) | 1.85 in (1993) |
| May 6 | 87.1°F (1966) | 24.1°F (1929) | 2.00 in (2007) |
| May 7 | 89.1°F (1934) | 25.0°F (1938) | 1.05 in (1978) |
| May 8 | 86.0°F (1985) | 18.0°F (2010) | 2.00 in (1995) |
| May 9 | 82.0°F (1962) | 21.0°F (1968) | 1.19 in (2015) |
| May 10 | 91.9°F (1934) | 21.9°F (1927) | 1.73 in (1985) |
| May 11 | 86.0°F (1940) | 14.0°F (1968) | 3.00 in (1922) |
| May 12 | 90.0°F (1960) | 15.1°F (1953) | 1.41 in (1989) |
| May 13 | 91.0°F (2001) | 23.0°F (1953) | 0.71 in (1994) |
| May 14 | 88.0°F (1936) | 26.1°F (1983) | 1.62 in (1970) |
| May 15 | 89.1°F (1936) | 25.0°F (2014) | 1.56 in (1925) |
| May 16 | 91.9°F (2012) | 28.0°F (1942) | 1.05 in (1942) |
| May 17 | 90.0°F (1948) | 25.0°F (1942) | 1.77 in (1978) |
| May 18 | 91.9°F (1948) | 21.9°F (1942) | 3.23 in (1978) |
| May 19 | 91.9°F (2009) | 25.0°F (1931) | 1.33 in (2025) |
| May 20 | 90.0°F (2009) | 23.0°F (1931) | 1.80 in (1982) |
| May 21 | 88.0°F (1954) | 18.0°F (1908) | 1.03 in (1912) |
| May 22 | 91.0°F (1980) | 27.0°F (1969) | 2.06 in (1923) |
| May 23 | 88.0°F (1926) | 28.0°F (1949) | 1.00 in (1908) |
| May 24 | 90.0°F (1922) | 24.1°F (2002) | 1.60 in (1965) |
| May 25 | 89.1°F (1931) | 28.9°F (2004) | 0.76 in (2011) |
| May 26 | 91.9°F (1922) | 30.0°F (1918) | 1.02 in (1962) |
| May 27 | 93.9°F (1969) | 27.0°F (1911) | 1.24 in (1981) |
| May 28 | 95.0°F (1934) | 25.0°F (1947) | 2.63 in (2001) |
| May 29 | 91.9°F (1934) | 30.0°F (1908) | 1.07 in (1929) |
| May 30 | 90.0°F (1939) | 30.9°F (1979) | 1.88 in (2013) |
| May 31 | 91.0°F (2020) | 28.9°F (1917) | 0.98 in (1939) |