December weather in Boise City, ID
The average temperature in Boise City in December is 32.1°F (25.4°F–38.8°F). Average precipitation: 1.54 inches. Average snowfall is 5.6 inches.
December is a winter month in Boise City, and is cooler than the annual average of 53.2°F. Daily temperatures swing about 13.4°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 8h 46m. For travel, December is cold.
Avg High
38.8°F
Avg Low
25.4°F
Precipitation
1.54 in
Snow
5.6 in
December records in Boise City
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 60.1°F (1941) | 9.0°F (1948) | 0.65 in (1994) |
| December 2 | 62.1°F (2012) | 9.0°F (1983) | 0.43 in (1977) |
| December 3 | 61.0°F (2007) | 15.1°F (1992) | 0.59 in (1950) |
| December 4 | 60.1°F (2007) | 3.9°F (1983) | 0.39 in (1978) |
| December 5 | 61.0°F (2023) | -6.0°F (1972) | 0.47 in (1971) |
| December 6 | 63.0°F (1987) | 0.0°F (1992) | 0.40 in (1975) |
| December 7 | 54.0°F (1981) | 0.0°F (1972) | 0.64 in (1970) |
| December 8 | 60.1°F (1993) | -18.9°F (1972) | 0.66 in (2004) |
| December 9 | 57.0°F (1993) | -20.9°F (1972) | 0.40 in (2004) |
| December 10 | 62.1°F (2025) | -23.1°F (1972) | 0.41 in (2016) |
| December 11 | 63.0°F (2014) | -22.0°F (1972) | 0.72 in (1958) |
| December 12 | 62.1°F (2014) | -9.0°F (1972) | 0.45 in (1995) |
| December 13 | 54.0°F (1969) | -14.1°F (1972) | 0.39 in (2006) |
| December 14 | 57.9°F (2002) | -9.0°F (1972) | 0.49 in (1983) |
| December 15 | 55.0°F (1968) | -7.1°F (1972) | 0.82 in (2009) |
| December 16 | 59.0°F (1941) | -2.0°F (1985) | 0.39 in (2024) |
| December 17 | 57.9°F (2025) | -2.0°F (1985) | 0.39 in (1972) |
| December 18 | 59.0°F (2024) | -2.9°F (1985) | 0.46 in (1941) |
| December 19 | 57.9°F (2025) | -6.0°F (1984) | 0.58 in (2010) |
| December 20 | 57.0°F (1964) | -8.0°F (1990) | 0.71 in (1996) |
| December 21 | 60.1°F (1964) | -23.1°F (1990) | 0.93 in (2025) |
| December 22 | 64.9°F (1964) | -25.1°F (1990) | 0.73 in (1964) |
| December 23 | 61.0°F (2025) | -18.0°F (1983) | 1.03 in (1955) |
| December 24 | 60.1°F (2025) | -20.0°F (1990) | 0.54 in (1980) |
| December 25 | 59.0°F (2025) | -20.0°F (1990) | 0.70 in (1996) |
| December 26 | 57.0°F (1976) | -8.0°F (1985) | 0.65 in (1996) |
| December 27 | 55.9°F (2022) | -7.1°F (1985) | 0.69 in (1945) |
| December 28 | 59.0°F (1945) | -9.0°F (1985) | 0.59 in (2005) |
| December 29 | 55.9°F (1996) | -17.0°F (1990) | 0.58 in (1981) |
| December 30 | 54.0°F (1996) | -9.0°F (1990) | 0.86 in (2002) |
| December 31 | 57.9°F (1996) | -9.0°F (1978) | 0.22 in (1942) |