December weather in Hartville, WY
The average temperature in Hartville in December is 26.7°F (13.4°F–39.9°F). Average precipitation: 0.90 inches.
December is a winter month in Hartville, and is cooler than the annual average of 48.6°F. Daily temperatures swing about 26.5°F between overnight low and afternoon high. Daylight averages about 8h 55m. For travel, December is cold.
Avg High
39.9°F
Avg Low
13.4°F
Precipitation
0.90 in
Daylight
8h 55m
December records in Hartville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 69.1°F (2021) | 3.9°F (2025) | 0.17 in (2022) |
| December 2 | 71.1°F (2021) | 8.1°F (2019) | 0.51 in (2019) |
| December 3 | 64.0°F (2012) | 10.0°F (1974) | 0.06 in (2013) |
| December 4 | 63.0°F (2021) | 1.0°F (2013) | 0.07 in (2013) |
| December 5 | 64.0°F (2012) | -11.9°F (2013) | 0.26 in (1978) |
| December 6 | 60.1°F (1963) | 10.9°F (2021) | 0.10 in (1967) |
| December 7 | 62.1°F (2024) | -4.0°F (2016) | 0.21 in (1988) |
| December 8 | 63.0°F (2020) | -14.1°F (2016) | 0.11 in (1972) |
| December 9 | 69.1°F (2015) | 8.1°F (2013) | 0.09 in (1972) |
| December 10 | 61.0°F (2015) | -2.9°F (2013) | 0.11 in (1965) |
| December 11 | 63.0°F (2025) | -4.0°F (1963) | 0.18 in (1987) |
| December 12 | 55.0°F (1962) | -8.0°F (1963) | 0.04 in (1984) |
| December 13 | 57.0°F (1962) | -14.1°F (1963) | 0.21 in (1984) |
| December 14 | 64.9°F (2025) | -13.0°F (1963) | 0.47 in (2021) |
| December 15 | 64.9°F (2025) | -2.9°F (2016) | 0.16 in (1989) |
| December 16 | 62.1°F (2025) | 1.9°F (2019) | 0.32 in (1964) |
| December 17 | 64.0°F (2025) | -0.9°F (2019) | 0.12 in (1975) |
| December 18 | 59.0°F (2013) | 1.0°F (2021) | 0.31 in (1973) |
| December 19 | 62.1°F (2025) | -24.0°F (2016) | 0.24 in (1973) |
| December 20 | 55.0°F (2024) | 3.9°F (2022) | 0.19 in (1983) |
| December 21 | 64.9°F (2024) | -18.0°F (2022) | 0.06 in (1989) |
| December 22 | 69.1°F (2025) | -20.0°F (2022) | 0.09 in (1969) |
| December 23 | 63.0°F (2025) | -14.1°F (2022) | 0.38 in (1987) |
| December 24 | 69.1°F (2025) | -9.9°F (1962) | 0.24 in (1982) |
| December 25 | 66.0°F (2025) | -14.1°F (1962) | 0.10 in (2019) |
| December 26 | 61.0°F (2025) | -8.0°F (1962) | 0.14 in (2019) |
| December 27 | 57.9°F (2022) | -2.0°F (1962) | 0.57 in (1987) |
| December 28 | 50.0°F (2022) | -7.1°F (2015) | 0.07 in (1979) |
| December 29 | 51.1°F (2024) | -0.9°F (2018) | 0.02 in (1963) |
| December 30 | 55.0°F (2013) | -0.9°F (1974) | 0.44 in (2019) |
| December 31 | 60.1°F (2025) | -6.0°F (2018) | 0.49 in (2019) |