December weather in San Luis, CO
The average temperature in San Luis in December is 23.7°F (8.9°F–38.6°F). Average precipitation: 0.41 inches.
December is a winter month in San Luis, and is cooler than the annual average of 43.9°F. Daily temperatures swing about 29.7°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 9h 27m. For travel, December is cold.
Avg High
38.6°F
Avg Low
8.9°F
Precipitation
0.41 in
Daylight
9h 27m
December records in San Luis
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 61.0°F (1999) | -9.0°F (1981) | 0.20 in (1982) |
| December 2 | 59.0°F (2003) | -8.0°F (1991) | 0.00 in (1980) |
| December 3 | 55.9°F (1995) | -8.0°F (1991) | 0.90 in (1999) |
| December 4 | 55.0°F (1980) | -9.0°F (1997) | 0.10 in (1997) |
| December 5 | 57.0°F (2001) | -9.0°F (1997) | 0.03 in (2004) |
| December 6 | 50.0°F (1987) | -13.0°F (1983) | 0.02 in (1986) |
| December 7 | 55.9°F (2003) | -8.0°F (1992) | 0.00 in (1980) |
| December 8 | 59.0°F (1995) | -6.0°F (1999) | 0.01 in (1987) |
| December 9 | 52.0°F (1981) | -4.0°F (1992) | 0.04 in (1986) |
| December 10 | 57.9°F (1996) | -18.0°F (1986) | 0.13 in (1986) |
| December 11 | 51.1°F (1984) | -18.9°F (1986) | 0.22 in (1982) |
| December 12 | 54.0°F (2004) | -11.9°F (1986) | 0.00 in (1980) |
| December 13 | 54.0°F (2004) | -13.0°F (1991) | 0.11 in (2001) |
| December 14 | 51.1°F (1996) | -14.1°F (1991) | 0.02 in (1984) |
| December 15 | 50.0°F (1984) | -11.9°F (1991) | 0.10 in (1995) |
| December 16 | 51.1°F (1980) | -13.0°F (1991) | 0.10 in (2004) |
| December 17 | 54.0°F (1980) | -9.9°F (1989) | 0.00 in (1980) |
| December 18 | 57.0°F (1980) | -8.0°F (1989) | 0.21 in (1987) |
| December 19 | 55.0°F (1980) | -15.0°F (1992) | 0.00 in (1980) |
| December 20 | 51.1°F (2003) | -14.1°F (1992) | 0.00 in (1980) |
| December 21 | 54.0°F (1981) | -8.0°F (1992) | 0.07 in (1995) |
| December 22 | 48.0°F (1982) | -9.9°F (1987) | 0.43 in (2003) |
| December 23 | 48.9°F (2005) | -22.0°F (1981) | 0.19 in (1981) |
| December 24 | 48.9°F (2005) | -27.0°F (1990) | 0.13 in (1982) |
| December 25 | 48.0°F (1985) | -25.1°F (1990) | 0.20 in (1987) |
| December 26 | 55.0°F (1980) | -16.1°F (1990) | 0.06 in (1987) |
| December 27 | 54.0°F (1980) | -15.0°F (1992) | 0.11 in (1987) |
| December 28 | 57.9°F (1980) | -16.1°F (1987) | 0.30 in (1983) |
| December 29 | 50.0°F (1980) | -24.0°F (1983) | 0.00 in (1980) |
| December 30 | 51.1°F (1998) | -22.0°F (1982) | 0.33 in (2001) |
| December 31 | 53.1°F (1980) | -18.0°F (1982) | 0.03 in (2001) |