May weather in St. Charles, ID
The average temperature in St. Charles in May is 49.2°F (37.8°F–60.5°F). Average precipitation: 1.80 inches. Average snowfall is 0.2 inches.
May is a spring month in St. Charles, and is warmer than the annual average of 41°F. Daily temperatures swing about 22.7°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 14h 23m. For travel, May is cool.
Avg High
60.5°F
Avg Low
37.8°F
Precipitation
1.80 in
Snow
0.2 in
May records in St. Charles
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 77.0°F (1981) | 21.0°F (1967) | 0.33 in (1920) |
| May 2 | 78.1°F (1985) | 21.9°F (1954) | 0.58 in (2022) |
| May 3 | 77.0°F (1947) | 23.0°F (2013) | 0.61 in (1950) |
| May 4 | 79.0°F (1966) | 19.9°F (1964) | 0.53 in (1993) |
| May 5 | 79.0°F (1966) | 21.0°F (1961) | 0.93 in (1926) |
| May 6 | 82.0°F (1934) | 19.0°F (1965) | 1.06 in (1993) |
| May 7 | 81.0°F (1947) | 19.9°F (2010) | 1.07 in (2016) |
| May 8 | 79.0°F (1934) | 21.0°F (2010) | 0.62 in (2013) |
| May 9 | 80.1°F (1954) | 21.0°F (1933) | 0.61 in (1950) |
| May 10 | 78.1°F (1940) | 25.0°F (1999) | 0.78 in (2015) |
| May 11 | 80.1°F (1941) | 23.0°F (1999) | 1.86 in (1983) |
| May 12 | 79.0°F (1941) | 25.0°F (1943) | 0.71 in (2010) |
| May 13 | 79.0°F (1936) | 21.0°F (1983) | 0.40 in (1958) |
| May 14 | 82.0°F (1936) | 27.0°F (1943) | 0.45 in (1923) |
| May 15 | 80.1°F (1927) | 28.0°F (1929) | 0.37 in (1989) |
| May 16 | 84.0°F (1927) | 28.0°F (1943) | 0.90 in (1984) |
| May 17 | 80.1°F (1927) | 21.0°F (1999) | 0.51 in (1945) |
| May 18 | 80.1°F (2006) | 30.0°F (1942) | 0.72 in (1996) |
| May 19 | 82.9°F (2006) | 26.1°F (2003) | 0.65 in (2015) |
| May 20 | 82.9°F (1954) | 27.0°F (1931) | 0.90 in (2016) |
| May 21 | 78.1°F (1980) | 26.1°F (1931) | 0.66 in (1954) |
| May 22 | 82.0°F (1934) | 28.0°F (1953) | 0.66 in (2019) |
| May 23 | 82.0°F (1934) | 28.0°F (1930) | 0.74 in (1995) |
| May 24 | 82.9°F (1934) | 21.9°F (1989) | 0.70 in (2019) |
| May 25 | 82.9°F (2003) | 19.9°F (1989) | 0.53 in (1997) |
| May 26 | 82.9°F (2003) | 28.9°F (1920) | 0.49 in (1995) |
| May 27 | 81.0°F (1936) | 26.1°F (1954) | 0.67 in (2008) |
| May 28 | 82.0°F (2003) | 27.0°F (1954) | 0.49 in (1996) |
| May 29 | 88.0°F (2003) | 27.0°F (1953) | 0.81 in (1967) |
| May 30 | 90.0°F (2003) | 28.0°F (1927) | 0.54 in (2005) |
| May 31 | 86.0°F (2003) | 28.9°F (1978) | 0.67 in (1939) |