Saint Marys Weather in December
Average highs run from 39°F on December 1 to 31°F on December 31, and lows from 24°F to 16°F. Normal precipitation for the month is 3.60 in over about 18 wet days.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 35°F
- Average low
- 20°F
- Precipitation
- 3.60 in
- Snowfall
- 14.2 in
- Record high
- 66°FDec 5, 2012
- Record low
- -10°FDec 21, 2004
- Chance of a freeze
- 100%
- Daylight
- 9 h 24 min to 9 h 14 min
- Cloud cover
- 78%
- Humidity
- 90%
- Dew point
- 25°F
- Wind
- 6.5 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Dec 1 | 39°F | 24°F | 65°F 2010 | 9°F 2013 | 55% | 21% |
| Dec 2 | 39°F | 24°F | 62°F 2006 | 10°F 1964 | 55% | 21% |
| Dec 3 | 38°F | 23°F | 54°F 1970 | 7°F 2003 | 55% | 22% |
| Dec 4 | 38°F | 23°F | 57°F 1973 | 7°F 2003 | 55% | 23% |
| Dec 5 | 38°F | 23°F | 66°F 2012 | 11°F 2003 | 56% | 23% |
| Dec 6 | 37°F | 22°F | 57°F 1973 | 1°F 2007 | 56% | 24% |
| Dec 7 | 37°F | 22°F | 49°F 2011 | 5°F 2007 | 56% | 24% |
| Dec 8 | 37°F | 22°F | 50°F 2004 | 4°F 2005 | 56% | 25% |
| Dec 9 | 36°F | 22°F | 51°F 2012 | 4°F 2005 | 57% | 25% |
| Dec 10 | 36°F | 21°F | 54°F 2023 | 5°F 1964 | 57% | 26% |
| Dec 11 | 36°F | 21°F | 57°F 2024 | 6°F 1964 | 57% | 26% |
| Dec 12 | 35°F | 21°F | 59°F 2021 | 6°F 2013 | 57% | 27% |
| Dec 13 | 35°F | 21°F | 58°F 2015 | -4°F 2005 | 58% | 27% |
| Dec 14 | 35°F | 20°F | 61°F 2015 | -1°F 2005 | 58% | 28% |
| Dec 15 | 34°F | 20°F | 62°F 2015 | -1°F 2005 | 58% | 28% |
| Dec 16 | 34°F | 20°F | 53°F 2011 | -1°F 2005 | 58% | 28% |
| Dec 17 | 34°F | 19°F | 57°F 2021 | -1°F 2016 | 58% | 29% |
| Dec 18 | 34°F | 19°F | 55°F 2006 | 6°F 1973 | 58% | 29% |
| Dec 19 | 33°F | 19°F | 49°F 2006 | 4°F 2010 | 58% | 30% |
| Dec 20 | 33°F | 19°F | 45°F 2017 | -9°F 2004 | 59% | 30% |
| Dec 21 | 33°F | 18°F | 51°F 2013 | -10°F 2004 | 59% | 30% |
| Dec 22 | 33°F | 18°F | 60°F 2013 | -3°F 2008 | 59% | 30% |
| Dec 23 | 33°F | 18°F | 58°F 2013 | -2°F 2024 | 59% | 31% |
| Dec 24 | 32°F | 18°F | 57°F 2015 | -8°F 2022 | 59% | 31% |
| Dec 25 | 32°F | 17°F | 59°F 2015 | -4°F 2022 | 59% | 31% |
| Dec 26 | 32°F | 17°F | 56°F 2015 | 1°F 2013 | 59% | 32% |
| Dec 27 | 32°F | 17°F | 55°F 1964 | -2°F 2017 | 59% | 32% |
| Dec 28 | 32°F | 17°F | 58°F 2015 | -7°F 2017 | 59% | 32% |
| Dec 29 | 32°F | 16°F | 59°F 2008 | -8°F 2017 | 60% | 33% |
| Dec 30 | 31°F | 16°F | 59°F 2024 | 3°F 2017 | 60% | 33% |
| Dec 31 | 31°F | 16°F | 55°F 2022 | -6°F 2017 | 60% | 33% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- December 1
- sunrise 7:21 AM, sunset 4:45 PM
- December 31
- sunrise 7:40 AM, sunset 4:54 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00363311 (Glen Hazel 2 Ne Dam), public domain. Records: NOAA GHCN-Daily, station USC00363311, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.