December weather in Mackay, ID
The average temperature in Mackay in December is 19.2°F (9.5°F–29.0°F). Average precipitation: 0.87 inches.
December is a winter month in Mackay, and is cooler than the annual average of 42.2°F. Daily temperatures swing about 19.5°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 8h 44m. For travel, December is cold.
Avg High
29.0°F
Avg Low
9.5°F
Precipitation
0.87 in
Daylight
8h 44m
December records in Mackay
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 55.9°F (1995) | -7.1°F (1984) | 0.50 in (2012) |
| December 2 | 55.0°F (1939) | -11.0°F (1984) | 0.82 in (1970) |
| December 3 | 54.0°F (1939) | -11.0°F (1970) | 1.16 in (1941) |
| December 4 | 54.0°F (1939) | -7.1°F (1928) | 0.40 in (1980) |
| December 5 | 54.0°F (2021) | -14.1°F (1972) | 1.08 in (1966) |
| December 6 | 55.0°F (1939) | -18.0°F (1972) | 1.05 in (1922) |
| December 7 | 53.1°F (1938) | -13.0°F (1972) | 0.78 in (1952) |
| December 8 | 53.1°F (1981) | -15.0°F (2005) | 0.19 in (2004) |
| December 9 | 53.1°F (2025) | -25.1°F (1919) | 0.85 in (1963) |
| December 10 | 54.0°F (1933) | -23.1°F (1972) | 1.04 in (1929) |
| December 11 | 57.9°F (2025) | -22.0°F (1972) | 0.66 in (1937) |
| December 12 | 57.9°F (2025) | -18.0°F (1984) | 0.79 in (1995) |
| December 13 | 55.9°F (2025) | -29.0°F (1919) | 0.35 in (1933) |
| December 14 | 50.0°F (1929) | -26.0°F (1919) | 0.25 in (1915) |
| December 15 | 57.0°F (1936) | -16.1°F (1914) | 0.56 in (1977) |
| December 16 | 54.0°F (1939) | -15.0°F (1922) | 0.30 in (1970) |
| December 17 | 55.0°F (1939) | -18.9°F (1964) | 0.51 in (2002) |
| December 18 | 48.0°F (1953) | -24.0°F (1924) | 0.60 in (1977) |
| December 19 | 48.0°F (1917) | -27.0°F (1924) | 0.52 in (1955) |
| December 20 | 46.0°F (2023) | -26.0°F (1924) | 0.83 in (1964) |
| December 21 | 46.0°F (2023) | -23.1°F (1990) | 0.43 in (2014) |
| December 22 | 48.0°F (1917) | -32.1°F (1990) | 0.38 in (1971) |
| December 23 | 46.9°F (1917) | -32.1°F (1983) | 0.88 in (1955) |
| December 24 | 46.9°F (2025) | -20.9°F (1990) | 0.60 in (1959) |
| December 25 | 46.9°F (2025) | -18.9°F (1990) | 0.42 in (2008) |
| December 26 | 46.9°F (2025) | -15.0°F (1952) | 0.23 in (1971) |
| December 27 | 50.0°F (1917) | -18.0°F (1916) | 0.53 in (1964) |
| December 28 | 48.9°F (1980) | -15.0°F (1983) | 0.31 in (1921) |
| December 29 | 55.0°F (1917) | -27.9°F (1984) | 0.55 in (1931) |
| December 30 | 53.1°F (1917) | -26.0°F (1990) | 0.29 in (1964) |
| December 31 | 48.0°F (1980) | -27.0°F (1978) | 0.51 in (2004) |