December is one of the cooler months of the year in Fall River, with average highs near 6°C and lows around -0.5°C (mean 2.8°C). It is a relatively wet time of year, averaging 108 mm of rainfall and 83% relative humidity across the period.
December is one of the cooler months of the year in Fall River. Across 45 years of records, the warmest December in Fall River was 2015 — when the month averaged 8.2°C — while the coldest was 1989 at -4.3°C. Typical December days reach 6°C with nights near -0.5°C. The long-term trend is warming, about 0.4°C per decade.
December is a relatively wet time of year in Fall River, averaging 108 mm of rainfall. The wettest December on record was 2023 with 210 mm, while the driest was 1998 at 35 mm.
Relative humidity in Fall River during December averages 83%. The most humid December was 1996 at 89%, and the least humid was 2000 at 76%.
December receives about 1.5 kWh/m²/day of solar energy in Fall River. The sunniest Decembers were 1989, 2000 and 2018 at 1.8 kWh/m²/day, and the cloudiest were 1992 and 1996 at 1.3.
Average wind speed in Fall River during December is 2.5 m/s. The windiest December was 2003 at 2.9 m/s, while the calmest was 2015 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 1.4°C | 2.9°C | 2.7°C | 3.4°C | 3.5°C | +2.1°C |
| Avg High | 4.8°C | 6.2°C | 5.9°C | 6.5°C | 6.6°C | +1.8°C |
| Avg Low | -1.9°C | -0.4°C | -0.6°C | 0.3°C | 0.3°C | +2.2°C |
| Avg Rain | 91 mm | 109 mm | 102 mm | 113 mm | 134 mm | +43 mm |
December temperatures in Fall River have risen by about 1.3°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -15.5°C (1983) to a record high of 18.5°C (2001).
Rainfall in December is a relatively wet time of year, averaging 108 mm, with a wettest year of 210 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
A quieter season to visit Fall River
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Fall River. That said, December — with days averaging 6°C and nights around -0.5°C (mean 2.8°C) and higher rainfall (108 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 4.3°C | 0.8°C | -2.7°C | 13.5°C | -8.7°C | 70 mm | 79% | 2.7 m/s | — |
| 2024 | 5.9°C | 2.8°C | -0.2°C | 15.7°C | -9.7°C | 158 mm | 82% | 2.2 m/s | 1.7 |
| 2023 🌧️ | 8.4°C | 5.5°C | 2.6°C | 15.9°C | -3.9°C | 210 mm | 86% | 2.1 m/s | 1.5 |
| 2022 | 6.2°C | 3.2°C | 0.2°C | 14.4°C | -8.2°C | 139 mm | 83% | 2.6 m/s | 1.7 |
| 2021 | 8.3°C | 5.1°C | 1.8°C | 16.2°C | -4.0°C | 47 mm | 81% | 2.2 m/s | 1.4 |
| 2020 | 6.7°C | 3.6°C | 0.4°C | 16.9°C | -6.0°C | 180 mm | 85% | 2.5 m/s | 1.5 |
| 2019 | 5.4°C | 2.4°C | -0.6°C | 14.4°C | -8.9°C | 179 mm | 86% | 2.5 m/s | 1.5 |
| 2018 | 5.3°C | 2.3°C | -0.6°C | 13.6°C | -5.3°C | 129 mm | 85% | 2.3 m/s | 1.8 |
| 2017 | 3.5°C | 0.6°C | -2.3°C | 14.1°C | -13.3°C | 62 mm | 80% | 2.4 m/s | 1.5 |
| 2016 | 6.4°C | 2.8°C | -0.7°C | 15.5°C | -10.7°C | 85 mm | 80% | 2.5 m/s | 1.6 |
| 2015 🔥 | 11.2°C | 8.2°C | 5.3°C | 15.8°C | 0.0°C | 131 mm | 86% | 2 m/s | 1.4 |
| 2014 | 6.9°C | 4.0°C | 1.1°C | 14.9°C | -4.1°C | 140 mm | 87% | 2.2 m/s | 1.4 |
| 2013 | 5.5°C | 2.5°C | -0.5°C | 13.4°C | -7.8°C | 97 mm | 85% | 2.3 m/s | 1.4 |
| 2012 | 7.8°C | 4.8°C | 1.7°C | 13.9°C | -4.8°C | 128 mm | 83% | 2.4 m/s | 1.4 |
| 2011 | 9.1°C | 5.4°C | 1.7°C | 15.5°C | -4.0°C | 95 mm | 84% | 2.3 m/s | 1.7 |
| 2010 | 3.4°C | 0.5°C | -2.4°C | 13.9°C | -8.3°C | 88 mm | 80% | 2.8 m/s | 1.6 |
| 2009 | 4.8°C | 1.4°C | -1.9°C | 17.0°C | -10.3°C | 144 mm | 84% | 2.8 m/s | 1.6 |
| 2008 | 7.1°C | 3.3°C | -0.5°C | 15.5°C | -9.5°C | 162 mm | 84% | 2.8 m/s | 1.4 |
| 2007 | 4.8°C | 1.8°C | -1.2°C | 12.1°C | -6.5°C | 116 mm | 84% | 2.5 m/s | 1.4 |
| 2006 | 8.8°C | 5.4°C | 2.0°C | 17.3°C | -4.6°C | 57 mm | 83% | 2.4 m/s | 1.6 |
| 2005 | 4.5°C | 1.6°C | -1.3°C | 11.5°C | -8.6°C | 87 mm | 85% | 2.5 m/s | 1.7 |
| 2004 | 6.6°C | 3.0°C | -0.6°C | 14.1°C | -11.9°C | 108 mm | 84% | 2.6 m/s | 1.5 |
| 2003 | 5.9°C | 2.9°C | -0.2°C | 12.2°C | -6.1°C | 100 mm | 81% | 2.9 m/s | 1.7 |
| 2002 | 4.5°C | 1.6°C | -1.3°C | 13.5°C | -7.6°C | 114 mm | 83% | 2.7 m/s | 1.6 |
| 2001 | 9.0°C | 5.6°C | 2.3°C | 18.5°C | -3.6°C | 55 mm | 80% | 2.2 m/s | 1.6 |
| 2000 | 3.2°C | 0.0°C | -3.3°C | 14.7°C | -10.2°C | 77 mm | 76% | 2.7 m/s | 1.8 |
| 1999 | 6.8°C | 3.6°C | 0.3°C | 13.8°C | -9.0°C | 65 mm | 78% | 2.5 m/s | 1.6 |
| 1998 | 7.7°C | 4.3°C | 1.0°C | 17.2°C | -8.5°C | 35 mm | 78% | 2.3 m/s | 1.4 |
| 1997 | 5.6°C | 2.3°C | -1.0°C | 10.4°C | -7.8°C | 81 mm | 83% | 2.5 m/s | 1.7 |
| 1996 | 6.8°C | 4.1°C | 1.5°C | 12.7°C | -10.0°C | 189 mm | 89% | 2.3 m/s | 1.3 |
| 1995 | 2.6°C | -0.8°C | -4.2°C | 10.7°C | -8.3°C | 65 mm | 86% | 2.7 m/s | 1.7 |
| 1994 | 7.2°C | 3.8°C | 0.3°C | 13.3°C | -8.9°C | 113 mm | 82% | 2.4 m/s | 1.4 |
| 1993 | 5.2°C | 2.0°C | -1.3°C | 12.8°C | -10.9°C | 147 mm | 83% | 2.5 m/s | 1.4 |
| 1992 | 5.5°C | 2.3°C | -0.8°C | 11.6°C | -8.8°C | 184 mm | 84% | 2.7 m/s | 1.3 |
| 1991 | 6.5°C | 2.9°C | -0.6°C | 13.6°C | -8.5°C | 87 mm | 83% | 2.5 m/s | 1.6 |
| 1990 | 8.1°C | 4.6°C | 1.0°C | 14.8°C | -4.4°C | 127 mm | 81% | 2.7 m/s | 1.4 |
| 1989 ❄️ | -0.5°C | -4.3°C | -8.0°C | 9.1°C | -14.7°C | 45 mm | 84% | 2.7 m/s | 1.8 |
| 1988 | 4.6°C | 1.2°C | -2.2°C | 12.1°C | -13.3°C | 39 mm | 79% | 2.6 m/s | 1.5 |
| 1987 | 5.5°C | 2.3°C | -0.9°C | 11.8°C | -13.3°C | 74 mm | 83% | 2.5 m/s | 1.5 |
| 1986 | 6.0°C | 2.6°C | -0.7°C | 15.5°C | -6.1°C | 183 mm | 83% | 2.6 m/s | 1.6 |
| 1985 | 4.3°C | 0.9°C | -2.5°C | 14.1°C | -8.3°C | 38 mm | 78% | 2.6 m/s | 1.6 |
| 1984 | 8.1°C | 4.5°C | 1.0°C | 14.0°C | -5.2°C | 78 mm | 82% | 2.3 m/s | 1.4 |
| 1983 | 4.3°C | 0.9°C | -2.6°C | 13.8°C | -15.5°C | 142 mm | 85% | 2.7 m/s | — |
| 1982 | 7.5°C | 4.3°C | 1.1°C | 15.5°C | -10.1°C | 56 mm | 85% | 2.3 m/s | — |
| 1981 | 3.4°C | 0.5°C | -2.4°C | 12.2°C | -10.8°C | 164 mm | 88% | 2.4 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 6°C with lows near -0.5°C (mean 2.8°C), based on 45 years of NASA POWER data.
December averages 108 mm of rainfall in Fall River, a relatively wet time of year. The wettest on record was 210 mm in 2023.
The hottest December reached 18.5°C in 2001. The coldest dipped to -15.5°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.3°C. Daytime highs moved from 5.5°C to 6.6°C and overnight lows from -1.1°C to 0.3°C over the same span.
December is one of the cooler months of the year in Fall River and a relatively wet time of year, so plan for around 6°C daytime highs and -0.5°C at night.
Not quite — December is the 3rd coolest month in Fall River, averaging 2.8°C.
For December in Fall River, pack warm layers and a jacket for chilly mornings, with typical highs of 6°C and lows of -0.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 83% — quite humid.
Average wind speed in December is 2.5 m/s. The windiest December on record averaged 2.9 m/s (2003).
The wettest December on record was 2023 with 210 mm. On average, December sees 108 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Fall River behaves each December, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for December specifically, along with year-by-year records and how the month has changed over the decades.
