December weather in Darby, MT
The average temperature in Darby in December is 25.7°F (19.2°F–32.2°F). Average precipitation: 1.26 inches.
December is a winter month in Darby, and is cooler than the annual average of 44.6°F. Daily temperatures swing about 13°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 8h 28m. For travel, December is cold.
Avg High
32.2°F
Avg Low
19.2°F
Precipitation
1.26 in
Daylight
8h 28m
December records in Darby
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 57.0°F (1941) | 3.0°F (1985) | 0.92 in (1995) |
| December 2 | 57.9°F (1941) | 0.0°F (1984) | 1.25 in (1977) |
| December 3 | 61.0°F (1965) | 1.0°F (1984) | 0.48 in (1958) |
| December 4 | 61.0°F (1939) | -11.0°F (1972) | 0.39 in (1950) |
| December 5 | 66.9°F (1939) | -20.9°F (1972) | 0.46 in (1996) |
| December 6 | 60.1°F (1939) | -18.9°F (1972) | 1.00 in (2015) |
| December 7 | 57.0°F (1939) | -15.0°F (2009) | 0.60 in (2025) |
| December 8 | 59.0°F (1940) | -27.9°F (1972) | 0.25 in (2003) |
| December 9 | 57.9°F (1957) | -27.9°F (1932) | 0.39 in (1970) |
| December 10 | 64.9°F (1939) | -18.0°F (1932) | 1.34 in (1956) |
| December 11 | 62.1°F (1939) | -25.1°F (1932) | 1.07 in (1946) |
| December 12 | 57.0°F (2014) | -11.9°F (1932) | 0.60 in (1929) |
| December 13 | 61.0°F (2014) | -9.9°F (1932) | 0.71 in (1946) |
| December 14 | 63.0°F (1929) | -11.9°F (1932) | 0.88 in (1977) |
| December 15 | 57.0°F (1980) | -14.1°F (1932) | 1.00 in (2016) |
| December 16 | 61.0°F (1942) | -9.9°F (1932) | 0.30 in (1955) |
| December 17 | 59.0°F (1976) | -9.0°F (1948) | 0.50 in (1931) |
| December 18 | 53.1°F (1966) | -9.9°F (1983) | 0.34 in (1937) |
| December 19 | 57.0°F (1966) | -11.9°F (1990) | 0.70 in (2025) |
| December 20 | 59.0°F (2004) | -24.0°F (1990) | 0.67 in (1953) |
| December 21 | 55.9°F (1940) | -27.9°F (1983) | 0.65 in (1972) |
| December 22 | 55.0°F (1933) | -27.9°F (1983) | 1.20 in (2014) |
| December 23 | 54.0°F (1950) | -25.1°F (1983) | 0.66 in (1933) |
| December 24 | 57.0°F (1950) | -34.1°F (1983) | 0.31 in (1941) |
| December 25 | 55.0°F (2005) | -17.0°F (1944) | 1.27 in (1996) |
| December 26 | 57.0°F (1972) | -17.0°F (1948) | 0.35 in (1980) |
| December 27 | 55.0°F (1980) | -14.1°F (1990) | 0.45 in (1928) |
| December 28 | 54.0°F (1949) | -14.1°F (1983) | 1.20 in (1998) |
| December 29 | 54.0°F (1962) | -27.0°F (1990) | 1.12 in (1945) |
| December 30 | 52.0°F (1962) | -25.1°F (1978) | 0.50 in (1967) |
| December 31 | 54.0°F (1962) | -27.0°F (1978) | 0.45 in (1909) |