December weather in Fitchburg, MA
The average temperature in Fitchburg in December is 29.5°F (21.5°F–37.4°F). Average precipitation: 4.86 inches.
December is a winter month in Fitchburg, and is cooler than the annual average of 47.6°F. Daily temperatures swing about 15.9°F between overnight low and afternoon high. Daylight averages about 8h 53m. For travel, December is cold.
Avg High
37.4°F
Avg Low
21.5°F
Precipitation
4.86 in
Daylight
8h 53m
December records in Fitchburg
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 60.1°F (2020) | 12.9°F (2019) | 1.98 in (2020) |
| December 2 | 60.1°F (2020) | 15.1°F (2024) | 1.22 in (2019) |
| December 3 | 53.1°F (2023) | 19.9°F (2024) | 1.18 in (2019) |
| December 4 | 54.0°F (2022) | 18.0°F (2024) | 0.42 in (2022) |
| December 5 | 53.1°F (2020) | 1.9°F (2025) | 0.52 in (2020) |
| December 6 | 46.0°F (2022) | 8.1°F (2025) | 1.90 in (2020) |
| December 7 | 55.9°F (2021) | 10.9°F (2019) | 0.64 in (2022) |
| December 8 | 55.0°F (2022) | 0.0°F (2019) | 0.15 in (2022) |
| December 9 | 48.0°F (2022) | -2.9°F (2025) | 0.08 in (2021) |
| December 10 | 53.1°F (2019) | 3.9°F (2025) | 0.88 in (2019) |
| December 11 | 60.1°F (2023) | 21.9°F (2022) | 2.24 in (2023) |
| December 12 | 62.1°F (2021) | 14.0°F (2025) | 1.14 in (2024) |
| December 13 | 43.0°F (2021) | 16.0°F (2019) | 0.42 in (2017) |
| December 14 | 51.1°F (2021) | 9.0°F (2024) | 1.62 in (2019) |
| December 15 | 48.9°F (2019) | 7.0°F (2025) | 0.20 in (2019) |
| December 16 | 52.0°F (2023) | 9.0°F (2025) | 0.42 in (2022) |
| December 17 | 57.9°F (2021) | 15.1°F (2020) | 1.31 in (2022) |
| December 18 | 59.0°F (2023) | 17.1°F (2020) | 2.21 in (2023) |
| December 19 | 59.0°F (2023) | 1.9°F (2020) | 1.50 in (2023) |
| December 20 | 55.0°F (2025) | 3.9°F (2020) | 0.29 in (2024) |
| December 21 | 43.0°F (2023) | 6.1°F (2019) | 0.57 in (2018) |
| December 22 | 39.0°F (2020) | 3.9°F (2024) | 0.95 in (2018) |
| December 23 | 51.1°F (2022) | -2.0°F (2024) | 2.62 in (2022) |
| December 24 | 53.1°F (2022) | 3.9°F (2022) | 0.73 in (2022) |
| December 25 | 57.9°F (2020) | 5.0°F (2022) | 1.71 in (2020) |
| December 26 | 57.9°F (2020) | 3.9°F (2025) | 0.74 in (2020) |
| December 27 | 52.0°F (2023) | 7.0°F (2025) | 0.18 in (2025) |
| December 28 | 50.0°F (2023) | 8.1°F (2025) | 0.58 in (2023) |
| December 29 | 48.0°F (2024) | 10.9°F (2025) | 0.29 in (2025) |
| December 30 | 52.0°F (2024) | 16.0°F (2025) | 0.74 in (2024) |
| December 31 | 55.9°F (2022) | 18.0°F (2025) | 1.47 in (2019) |