May weather in Ketchum, ID
The average temperature in Ketchum in May is 48.2°F (34.7°F–61.6°F). Average precipitation: 1.78 inches. Average snowfall is 0.2 inches.
May is a spring month in Ketchum, and is warmer than the annual average of 40.2°F. Daily temperatures swing about 26.9°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 14h 32m. For travel, May is cool.
Avg High
61.6°F
Avg Low
34.7°F
Precipitation
1.78 in
Snow
0.2 in
May records in Ketchum
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 73.9°F (1981) | 19.9°F (1986) | 0.98 in (2022) |
| May 2 | 77.0°F (1985) | 19.0°F (1988) | 0.57 in (1995) |
| May 3 | 75.9°F (2004) | 19.9°F (1988) | 0.35 in (2024) |
| May 4 | 77.0°F (2004) | 21.0°F (1996) | 0.59 in (1976) |
| May 5 | 77.0°F (1992) | 18.0°F (1977) | 0.69 in (2009) |
| May 6 | 77.0°F (1987) | 21.0°F (1975) | 0.69 in (1995) |
| May 7 | 80.1°F (1992) | 19.0°F (2010) | 0.71 in (1977) |
| May 8 | 78.1°F (1987) | 17.1°F (2002) | 0.24 in (2000) |
| May 9 | 75.9°F (1987) | 18.0°F (1990) | 0.60 in (1980) |
| May 10 | 78.1°F (1987) | 12.0°F (1999) | 0.27 in (2005) |
| May 11 | 79.0°F (2025) | 19.9°F (1983) | 1.00 in (1998) |
| May 12 | 78.1°F (1994) | 19.9°F (1992) | 0.27 in (2005) |
| May 13 | 79.0°F (1988) | 19.0°F (1974) | 0.65 in (1994) |
| May 14 | 77.0°F (1973) | 21.9°F (1986) | 0.51 in (1998) |
| May 15 | 82.9°F (1973) | 21.9°F (1986) | 0.33 in (1996) |
| May 16 | 87.1°F (1973) | 18.0°F (1974) | 0.62 in (2005) |
| May 17 | 84.9°F (2006) | 21.0°F (1990) | 1.00 in (2005) |
| May 18 | 82.9°F (2008) | 21.9°F (1990) | 0.60 in (1991) |
| May 19 | 82.9°F (2008) | 18.0°F (1991) | 1.32 in (2005) |
| May 20 | 82.0°F (2008) | 21.9°F (1989) | 0.39 in (1985) |
| May 21 | 79.0°F (2002) | 12.0°F (2010) | 0.48 in (2019) |
| May 22 | 79.0°F (2002) | 17.1°F (1977) | 0.54 in (2002) |
| May 23 | 77.0°F (1988) | 18.0°F (2013) | 0.51 in (1977) |
| May 24 | 82.9°F (2001) | 23.0°F (1998) | 1.40 in (1976) |
| May 25 | 84.0°F (2001) | 23.0°F (1990) | 0.78 in (1977) |
| May 26 | 82.0°F (1986) | 21.9°F (1990) | 0.35 in (1987) |
| May 27 | 82.0°F (1986) | 21.9°F (1990) | 0.50 in (2010) |
| May 28 | 82.9°F (1983) | 21.9°F (1991) | 0.48 in (2008) |
| May 29 | 86.0°F (1983) | 21.0°F (1991) | 0.51 in (1990) |
| May 30 | 89.1°F (2003) | 24.1°F (1978) | 0.53 in (1988) |
| May 31 | 84.0°F (1983) | 21.9°F (1996) | 0.75 in (1988) |