December weather in Monessen, PA
The average temperature in Monessen in December is 35.2°F (27.0°F–43.4°F). Average precipitation: 3.27 inches. Average snowfall is 1.5 inches.
December is a winter month in Monessen, and is cooler than the annual average of 52.9°F. Daily temperatures swing about 16.4°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 9h 9m. For travel, December is cold.
Avg High
43.4°F
Avg Low
27.0°F
Precipitation
3.27 in
Snow
1.5 in
December records in Monessen
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 63.0°F (2017) | 21.9°F (2024) | 2.14 in (2010) |
| December 2 | 61.0°F (2012) | 21.0°F (2022) | 1.35 in (1974) |
| December 3 | 66.9°F (2018) | 27.0°F (2011) | 2.74 in (1991) |
| December 4 | 60.1°F (2012) | 26.1°F (2022) | 1.21 in (1978) |
| December 5 | 68.0°F (2012) | 19.0°F (2025) | 0.75 in (1993) |
| December 6 | 61.0°F (2013) | 19.0°F (2025) | 0.88 in (1971) |
| December 7 | 55.0°F (2021) | 24.1°F (2018) | 1.03 in (1976) |
| December 8 | 66.0°F (2022) | 19.9°F (2013) | 1.00 in (2012) |
| December 9 | 63.0°F (2023) | 15.1°F (2025) | 1.55 in (1978) |
| December 10 | 61.0°F (2015) | 14.0°F (2025) | 0.85 in (2019) |
| December 11 | 64.0°F (2021) | 18.0°F (2018) | 1.73 in (1992) |
| December 12 | 64.9°F (2020) | 18.0°F (2013) | 1.69 in (1944) |
| December 13 | 70.0°F (2015) | 17.1°F (2017) | 1.29 in (1949) |
| December 14 | 62.1°F (2015) | 17.1°F (2017) | 1.00 in (2007) |
| December 15 | 60.1°F (2015) | 10.9°F (2025) | 1.10 in (1999) |
| December 16 | 57.9°F (2011) | 5.0°F (2016) | 0.88 in (1990) |
| December 17 | 69.1°F (2021) | 5.0°F (2016) | 0.93 in (2020) |
| December 18 | 62.1°F (2016) | 26.1°F (2017) | 1.68 in (2016) |
| December 19 | 63.0°F (2021) | 15.1°F (2016) | 1.30 in (1990) |
| December 20 | 57.9°F (2013) | 15.1°F (2016) | 1.58 in (2008) |
| December 21 | 60.1°F (2013) | 15.1°F (2016) | 1.30 in (2012) |
| December 22 | 62.1°F (2013) | 18.0°F (2025) | 1.18 in (1998) |
| December 23 | 66.9°F (2015) | 14.0°F (2024) | 0.50 in (2006) |
| December 24 | 57.9°F (2015) | -0.9°F (2022) | 0.63 in (1990) |
| December 25 | 70.0°F (2015) | 1.0°F (2022) | 1.20 in (2008) |
| December 26 | 62.1°F (2015) | 10.9°F (2022) | 1.02 in (1957) |
| December 27 | 64.9°F (2016) | 10.9°F (2022) | 1.13 in (1943) |
| December 28 | 68.0°F (2015) | 5.0°F (2017) | 0.91 in (1968) |
| December 29 | 66.0°F (2025) | 5.0°F (2017) | 0.57 in (1983) |
| December 30 | 61.0°F (2022) | 12.9°F (2017) | 2.48 in (1942) |
| December 31 | 68.0°F (2022) | 3.9°F (2017) | 1.16 in (1990) |