December weather in Fairfield, ID
The average temperature in Fairfield in December is 19.0°F (10.0°F–28.0°F). Average precipitation: 1.98 inches.
December is a winter month in Fairfield, and is cooler than the annual average of 42.1°F. Daily temperatures swing about 18°F between overnight low and afternoon high. Daylight averages about 8h 48m. For travel, December is cold.
Avg High
28.0°F
Avg Low
10.0°F
Precipitation
1.98 in
Daylight
8h 48m
December records in Fairfield
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 55.0°F (1972) | -15.0°F (1984) | 1.36 in (2005) |
| December 2 | 57.9°F (2008) | -20.9°F (1984) | 1.23 in (1980) |
| December 3 | 51.1°F (2024) | -11.9°F (1984) | 1.03 in (1962) |
| December 4 | 48.0°F (1976) | -18.0°F (1992) | 0.82 in (1970) |
| December 5 | 46.9°F (1987) | -23.1°F (1992) | 0.69 in (1966) |
| December 6 | 50.0°F (1965) | -22.0°F (1992) | 0.72 in (1983) |
| December 7 | 50.0°F (1965) | -16.1°F (1992) | 0.90 in (1950) |
| December 8 | 52.0°F (1976) | -27.0°F (1951) | 0.61 in (1993) |
| December 9 | 46.9°F (1975) | -26.0°F (1951) | 0.70 in (1983) |
| December 10 | 53.1°F (2025) | -29.0°F (1972) | 0.69 in (2016) |
| December 11 | 51.1°F (2025) | -24.0°F (1972) | 0.65 in (1956) |
| December 12 | 53.1°F (2025) | -24.0°F (1972) | 1.15 in (1995) |
| December 13 | 57.0°F (2025) | -20.9°F (1967) | 1.05 in (2015) |
| December 14 | 52.0°F (2025) | -23.1°F (1967) | 1.65 in (2000) |
| December 15 | 46.0°F (1976) | -20.9°F (1972) | 0.91 in (1981) |
| December 16 | 51.1°F (2025) | -15.0°F (2005) | 2.50 in (1994) |
| December 17 | 51.1°F (1962) | -32.1°F (1964) | 0.74 in (1972) |
| December 18 | 48.9°F (1958) | -23.1°F (2016) | 1.10 in (1951) |
| December 19 | 57.9°F (2008) | -23.1°F (1984) | 2.20 in (2001) |
| December 20 | 46.9°F (1958) | -23.1°F (1970) | 0.90 in (2014) |
| December 21 | 44.1°F (1989) | -31.0°F (1983) | 0.95 in (1964) |
| December 22 | 45.0°F (1964) | -33.0°F (1983) | 2.38 in (1964) |
| December 23 | 45.0°F (1956) | -40.0°F (1983) | 1.32 in (1964) |
| December 24 | 44.1°F (2025) | -24.0°F (1983) | 1.54 in (1968) |
| December 25 | 45.0°F (2025) | -29.9°F (1951) | 1.00 in (1988) |
| December 26 | 52.0°F (1976) | -26.0°F (2015) | 0.30 in (1960) |
| December 27 | 46.9°F (1967) | -25.1°F (1988) | 0.97 in (1951) |
| December 28 | 44.1°F (1980) | -20.0°F (1982) | 0.60 in (1957) |
| December 29 | 45.0°F (2017) | -20.9°F (1982) | 0.90 in (2025) |
| December 30 | 44.1°F (2023) | -24.0°F (1982) | 0.71 in (2011) |
| December 31 | 46.9°F (1962) | -25.1°F (1982) | 2.43 in (2002) |