December weather in Sinai, SD
The average temperature in Sinai in December is 19.6°F (11.1°F–28.0°F). Average precipitation: 0.58 inches.
December is a winter month in Sinai, and is cooler than the annual average of 44.7°F. Daily temperatures swing about 16.9°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 8h 41m. For travel, December is cold.
Avg High
28.0°F
Avg Low
11.1°F
Precipitation
0.58 in
Daylight
8h 41m
December records in Sinai
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 63.0°F (1998) | 0.0°F (2005) | 0.41 in (1945) |
| December 2 | 61.0°F (1998) | -11.9°F (2005) | 0.42 in (2007) |
| December 3 | 59.0°F (1998) | -5.1°F (2006) | 0.31 in (1953) |
| December 4 | 48.0°F (2004) | -9.0°F (2005) | 0.55 in (1938) |
| December 5 | 45.0°F (1998) | -16.1°F (2005) | 0.35 in (1972) |
| December 6 | 41.0°F (2002) | -15.0°F (2005) | 0.35 in (1935) |
| December 7 | 46.0°F (1999) | -9.0°F (2005) | 0.18 in (1937) |
| December 8 | 46.0°F (1999) | -6.0°F (1995) | 0.19 in (1963) |
| December 9 | 55.9°F (2006) | -11.9°F (1995) | 0.46 in (2008) |
| December 10 | 51.1°F (2002) | -14.1°F (2000) | 0.85 in (1970) |
| December 11 | 46.0°F (1998) | -8.0°F (1994) | 0.66 in (1949) |
| December 12 | 51.1°F (1998) | -20.0°F (2000) | 0.31 in (1968) |
| December 13 | 53.1°F (1998) | -8.0°F (2000) | 0.44 in (1937) |
| December 14 | 57.9°F (1998) | -11.9°F (2000) | 0.45 in (2008) |
| December 15 | 48.0°F (2002) | -18.0°F (2008) | 0.89 in (1996) |
| December 16 | 48.0°F (2006) | -18.9°F (2008) | 0.21 in (1967) |
| December 17 | 42.1°F (1997) | -13.0°F (2000) | 0.41 in (1967) |
| December 18 | 53.1°F (2011) | -8.0°F (1996) | 0.31 in (2002) |
| December 19 | 44.1°F (2006) | -16.1°F (1996) | 0.24 in (1957) |
| December 20 | 42.1°F (2004) | -16.1°F (1996) | 0.30 in (2008) |
| December 21 | 42.1°F (2003) | -13.0°F (2008) | 0.54 in (2010) |
| December 22 | 41.0°F (2005) | -20.0°F (2000) | 0.52 in (1968) |
| December 23 | 45.0°F (2005) | -14.1°F (1992) | 0.42 in (1987) |
| December 24 | 43.0°F (2011) | -20.9°F (2000) | 0.30 in (1931) |
| December 25 | 44.1°F (1999) | -14.1°F (1996) | 0.96 in (2009) |
| December 26 | 50.0°F (2011) | -20.9°F (1996) | 0.29 in (2009) |
| December 27 | 44.1°F (2011) | -18.9°F (1993) | 0.46 in (1959) |
| December 28 | 46.0°F (1999) | -24.0°F (1993) | 0.37 in (1987) |
| December 29 | 54.0°F (1999) | -9.9°F (2009) | 0.49 in (1972) |
| December 30 | 55.9°F (2004) | -6.0°F (1993) | 0.98 in (2005) |
| December 31 | 50.0°F (1997) | -16.1°F (2008) | 0.95 in (1931) |