Hyannis Weather in December
Average highs run from 41°F on December 1 to 36°F on December 31, and lows from 21°F to 16°F. Normal precipitation for the month is 0.27 in over about 5 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
- 37°F
- Average low
- 18°F
- Precipitation
- 0.27 in
- Record high
- 74°FDec 24, 2025
- Record low
- -30°FDec 22, 1998
- Chance of a freeze
- 100%
- Daylight
- 9 h 20 min to 9 h 10 min
- Cloud cover
- 60%
- Humidity
- 68%
- Dew point
- 17°F
- Wind
- 12.5 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Dec 1 | 41°F | 21°F | 72°F 1998 | -8°F 2025 | 13% |
| Dec 2 | 40°F | 21°F | 73°F 2021 | -2°F 2019 | 13% |
| Dec 3 | 40°F | 20°F | 64°F 2024 | -7°F 2009 | 13% |
| Dec 4 | 40°F | 20°F | 66°F 2007 | -7°F 2009 | 13% |
| Dec 5 | 39°F | 20°F | 66°F 2012 | -5°F 2011 | 13% |
| Dec 6 | 39°F | 19°F | 67°F 2023 | -12°F 2011 | 13% |
| Dec 7 | 38°F | 19°F | 64°F 2003 | -23°F 2005 | 13% |
| Dec 8 | 38°F | 19°F | 66°F 2020 | -24°F 2005 | 13% |
| Dec 9 | 38°F | 19°F | 68°F 2020 | -26°F 2009 | 14% |
| Dec 10 | 38°F | 19°F | 62°F 2014 | -21°F 2009 | 14% |
| Dec 11 | 37°F | 18°F | 67°F 2025 | -24°F 2000 | 14% |
| Dec 12 | 37°F | 18°F | 66°F 2014 | -21°F 2000 | 14% |
| Dec 13 | 37°F | 18°F | 60°F 2010 | -7°F 2016 | 14% |
| Dec 14 | 37°F | 18°F | 63°F 1998 | -11°F 2008 | 14% |
| Dec 15 | 36°F | 18°F | 64°F 2002 | -19°F 2008 | 14% |
| Dec 16 | 36°F | 17°F | 67°F 2025 | -5°F 2008 | 14% |
| Dec 17 | 36°F | 17°F | 62°F 1998 | -28°F 2016 | 14% |
| Dec 18 | 36°F | 17°F | 60°F 2011 | -28°F 2016 | 14% |
| Dec 19 | 36°F | 17°F | 68°F 2025 | -14°F 1996 | 14% |
| Dec 20 | 36°F | 17°F | 65°F 2017 | -13°F 2022 | 15% |
| Dec 21 | 36°F | 17°F | 61°F 2023 | -24°F 1998 | 15% |
| Dec 22 | 36°F | 17°F | 71°F 2025 | -30°F 1998 | 15% |
| Dec 23 | 36°F | 17°F | 66°F 2025 | -22°F 1998 | 15% |
| Dec 24 | 36°F | 17°F | 74°F 2025 | -22°F 1998 | 15% |
| Dec 25 | 35°F | 16°F | 69°F 2025 | -8°F 2012 | 15% |
| Dec 26 | 35°F | 16°F | 65°F 2005 | -21°F 2017 | 15% |
| Dec 27 | 36°F | 16°F | 54°F 2002 | -13°F 2017 | 15% |
| Dec 28 | 36°F | 16°F | 64°F 1999 | -12°F 2012 | 15% |
| Dec 29 | 36°F | 16°F | 61°F 1996 | -14°F 2015 | 15% |
| Dec 30 | 36°F | 16°F | 59°F 1996 | -28°F 2014 | 15% |
| Dec 31 | 36°F | 16°F | 62°F 2005 | -28°F 2014 | 15% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 6:56 AM, sunset 4:16 PM
- December 31
- sunrise 7:15 AM, sunset 4:25 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00094079 (Whitman 5 Ene), public domain. Records: NOAA GHCN-Daily, station USW00024044, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.