December weather in Greenwich, NY
The average temperature in Greenwich in December is 28.6°F (18.9°F–38.3°F). Average precipitation: 3.68 inches.
December is a winter month in Greenwich, and is cooler than the annual average of 46.9°F. Daily temperatures swing about 19.4°F between overnight low and afternoon high. Daylight averages about 8h 50m. For travel, December is cold.
Avg High
38.3°F
Avg Low
18.9°F
Precipitation
3.68 in
Daylight
8h 50m
December records in Greenwich
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 61.0°F (2020) | 7.0°F (2013) | 1.29 in (2020) |
| December 2 | 60.1°F (2020) | 12.0°F (2019) | 1.32 in (2019) |
| December 3 | 52.0°F (2012) | 18.0°F (2024) | 0.65 in (2025) |
| December 4 | 55.9°F (2022) | 12.0°F (2019) | 0.84 in (2023) |
| December 5 | 60.1°F (2012) | -8.0°F (2025) | 0.32 in (2012) |
| December 6 | 55.9°F (2011) | -6.0°F (2025) | 0.71 in (2017) |
| December 7 | 57.9°F (2011) | 12.9°F (2019) | 0.44 in (2014) |
| December 8 | 60.1°F (2022) | -2.9°F (2019) | 1.48 in (2011) |
| December 9 | 48.9°F (2022) | -7.1°F (2025) | 0.12 in (2021) |
| December 10 | 57.9°F (2023) | 12.9°F (2018) | 1.14 in (2014) |
| December 11 | 60.1°F (2023) | 8.1°F (2018) | 1.36 in (2023) |
| December 12 | 62.1°F (2021) | 8.1°F (2018) | 1.58 in (2024) |
| December 13 | 53.1°F (2015) | 5.0°F (2022) | 0.20 in (2017) |
| December 14 | 53.1°F (2021) | 6.1°F (2013) | 0.49 in (2019) |
| December 15 | 60.1°F (2015) | 1.9°F (2025) | 0.60 in (2013) |
| December 16 | 52.0°F (2023) | -6.0°F (2016) | 0.39 in (2011) |
| December 17 | 63.0°F (2021) | -9.0°F (2013) | 1.76 in (2020) |
| December 18 | 57.9°F (2023) | -9.0°F (2013) | 0.98 in (2016) |
| December 19 | 59.0°F (2023) | -11.0°F (2020) | 0.94 in (2023) |
| December 20 | 59.0°F (2025) | -9.9°F (2020) | 0.94 in (2025) |
| December 21 | 54.0°F (2018) | -5.1°F (2019) | 0.34 in (2018) |
| December 22 | 60.1°F (2018) | -2.0°F (2024) | 0.99 in (2011) |
| December 23 | 53.1°F (2022) | -8.0°F (2024) | 0.63 in (2015) |
| December 24 | 57.0°F (2022) | -6.0°F (2024) | 0.48 in (2014) |
| December 25 | 68.0°F (2015) | 3.0°F (2022) | 0.49 in (2014) |
| December 26 | 62.1°F (2020) | -4.0°F (2024) | 0.57 in (2021) |
| December 27 | 55.9°F (2015) | -7.1°F (2017) | 0.45 in (2015) |
| December 28 | 51.1°F (2023) | -8.0°F (2017) | 0.47 in (2014) |
| December 29 | 55.0°F (2018) | -11.9°F (2017) | 1.14 in (2025) |
| December 30 | 60.1°F (2024) | -14.1°F (2017) | 0.92 in (2013) |
| December 31 | 57.9°F (2024) | -7.1°F (2017) | 0.34 in (2019) |