December is one of the cooler months of the year in Worcester, with average highs near 2°C and lows around -6°C (mean -2°C). It is about average for rainfall, averaging 104 mm of rainfall and 87% relative humidity across the period.
December is one of the cooler months of the year in Worcester. Across 45 years of records, the warmest December in Worcester was 2015 — when the month averaged 4.4°C — while the coldest was 1989 at -10.1°C. Typical December days reach 2°C with nights near -6°C. The long-term trend is warming, about 0.5°C per decade.
December is about average for rainfall in Worcester, averaging 104 mm of rainfall. The wettest December on record was 2023 with 204 mm, while the driest was 1988 at 34 mm.
Relative humidity in Worcester during December averages 87%. The most humid December was 1981 at 97%, and the least humid was 2000 at 78%.
December receives about 1.5 kWh/m²/day of solar energy in Worcester. The sunniest Decembers were 1989 and 2018 at 1.8 kWh/m²/day, and the cloudiest were 2013, 2014 and 2015, among others at 1.3.
Average wind speed in Worcester during December is 0.1 m/s. The windiest Decembers were 2005, 2017 and 2025, among others at 0.2 m/s, while the calmest were 2022, 2023 and 2024, among others at 0.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -3.7°C | -1.6°C | -2.1°C | -1.4°C | -0.9°C | +2.8°C |
| Avg High | 0.3°C | 2.4°C | 1.9°C | 2.5°C | 3.2°C | +2.9°C |
| Avg Low | -7.8°C | -5.5°C | -6.1°C | -5.2°C | -4.9°C | +2.9°C |
| Avg Rain | 83 mm | 103 mm | 107 mm | 108 mm | 127 mm | +44 mm |
December temperatures in Worcester have risen by about 2.2°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -24.1°C (2017) to a record high of 19.6°C (2015).
Rainfall in December is about average for rainfall, averaging 104 mm, with a wettest year of 204 mm.
A quieter season to visit Worcester
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Worcester. That said, December — with days averaging 2°C and nights around -6°C (mean -2°C) and higher rainfall (104 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 | 0.0°C | -4.3°C | -8.6°C | 13.3°C | -16.7°C | 84 mm | 83% | 0.2 m/s | — |
| 2024 | 2.8°C | -1.4°C | -5.5°C | 15.7°C | -15.4°C | 116 mm | 83% | 0.1 m/s | 1.7 |
| 2023 🌧️ | 5.5°C | 1.8°C | -1.9°C | 16.2°C | -8.7°C | 204 mm | 90% | 0.1 m/s | 1.5 |
| 2022 | 3.5°C | -0.6°C | -4.7°C | 13.0°C | -12.8°C | 140 mm | 85% | 0.1 m/s | 1.7 |
| 2021 | 4.1°C | 0.2°C | -3.7°C | 14.5°C | -11.3°C | 82 mm | 86% | 0.1 m/s | 1.4 |
| 2020 | 3.0°C | -1.0°C | -5.0°C | 15.9°C | -16.2°C | 137 mm | 87% | 0.1 m/s | 1.4 |
| 2019 | 1.4°C | -2.4°C | -6.1°C | 11.9°C | -17.1°C | 165 mm | 91% | 0.1 m/s | 1.4 |
| 2018 | 2.4°C | -1.7°C | -5.9°C | 14.7°C | -11.8°C | 99 mm | 88% | 0.1 m/s | 1.8 |
| 2017 | -0.9°C | -4.7°C | -8.5°C | 12.4°C | -24.1°C | 65 mm | 85% | 0.2 m/s | 1.5 |
| 2016 | 1.7°C | -2.3°C | -6.3°C | 11.5°C | -19.5°C | 88 mm | 85% | 0.1 m/s | 1.6 |
| 2015 🔥 | 8.4°C | 4.4°C | 0.3°C | 19.6°C | -7.5°C | 114 mm | 87% | 0.1 m/s | 1.3 |
| 2014 | 2.8°C | -0.7°C | -4.2°C | 12.4°C | -12.5°C | 131 mm | 90% | 0.1 m/s | 1.3 |
| 2013 | 0.3°C | -3.4°C | -7.0°C | 11.2°C | -23.6°C | 96 mm | 90% | 0.1 m/s | 1.3 |
| 2012 | 3.9°C | 0.1°C | -3.6°C | 13.2°C | -11.3°C | 119 mm | 87% | 0.1 m/s | 1.3 |
| 2011 | 4.7°C | 0.4°C | -4.0°C | 13.3°C | -11.9°C | 113 mm | 89% | 0.1 m/s | 1.7 |
| 2010 | 0.3°C | -3.4°C | -7.2°C | 13.2°C | -13.1°C | 95 mm | 83% | 0.1 m/s | 1.6 |
| 2009 | 0.3°C | -3.3°C | -6.9°C | 16.7°C | -16.0°C | 114 mm | 87% | 0.1 m/s | 1.5 |
| 2008 | 2.3°C | -2.3°C | -6.9°C | 13.6°C | -19.5°C | 167 mm | 90% | 0.1 m/s | 1.3 |
| 2007 | 0.3°C | -3.6°C | -7.5°C | 7.4°C | -20.9°C | 122 mm | 91% | 0.1 m/s | 1.3 |
| 2006 | 5.4°C | 1.6°C | -2.1°C | 17.4°C | -8.8°C | 56 mm | 86% | 0.1 m/s | 1.5 |
| 2005 | 0.3°C | -3.6°C | -7.5°C | 7.4°C | -18.5°C | 104 mm | 90% | 0.2 m/s | 1.6 |
| 2004 | 2.3°C | -2.0°C | -6.3°C | 12.9°C | -19.1°C | 105 mm | 86% | 0.1 m/s | 1.5 |
| 2003 | 2.5°C | -1.6°C | -5.7°C | 12.1°C | -13.8°C | 123 mm | 86% | 0.1 m/s | 1.5 |
| 2002 | 0.7°C | -3.1°C | -6.9°C | 12.5°C | -14.3°C | 115 mm | 87% | 0.1 m/s | 1.6 |
| 2001 | 5.2°C | 1.4°C | -2.5°C | 18.7°C | -8.9°C | 64 mm | 82% | 0.1 m/s | 1.7 |
| 2000 | -0.3°C | -4.5°C | -8.8°C | 15.4°C | -15.4°C | 96 mm | 78% | 0.1 m/s | 1.7 |
| 1999 | 3.7°C | -0.5°C | -4.6°C | 12.2°C | -14.0°C | 52 mm | 80% | 0.1 m/s | 1.6 |
| 1998 | 5.4°C | 0.8°C | -3.7°C | 18.9°C | -17.2°C | 40 mm | 81% | 0.1 m/s | 1.6 |
| 1997 | 1.9°C | -2.2°C | -6.3°C | 6.9°C | -17.6°C | 69 mm | 87% | 0.1 m/s | 1.6 |
| 1996 | 3.0°C | -0.3°C | -3.5°C | 11.9°C | -18.0°C | 186 mm | 93% | 0.1 m/s | 1.4 |
| 1995 | -2.2°C | -6.0°C | -9.8°C | 4.6°C | -15.1°C | 63 mm | 93% | 0.1 m/s | 1.7 |
| 1994 | 3.6°C | -0.7°C | -5.0°C | 14.5°C | -14.9°C | 138 mm | 86% | 0.1 m/s | 1.5 |
| 1993 | 1.7°C | -2.2°C | -6.0°C | 8.8°C | -18.0°C | 132 mm | 85% | 0.1 m/s | 1.4 |
| 1992 | 1.1°C | -2.6°C | -6.3°C | 6.7°C | -14.8°C | 130 mm | 88% | 0.1 m/s | 1.3 |
| 1991 | 2.0°C | -2.3°C | -6.6°C | 13.0°C | -14.3°C | 89 mm | 88% | 0.1 m/s | 1.5 |
| 1990 | 3.9°C | 0.1°C | -3.6°C | 16.2°C | -11.2°C | 130 mm | 85% | 0.1 m/s | 1.4 |
| 1989 ❄️ | -5.5°C | -10.1°C | -14.7°C | 1.4°C | -22.5°C | 35 mm | 84% | 0.1 m/s | 1.8 |
| 1988 | 0.6°C | -3.4°C | -7.5°C | 8.1°C | -18.0°C | 34 mm | 81% | 0.1 m/s | 1.5 |
| 1987 | 1.6°C | -1.8°C | -5.3°C | 8.1°C | -17.4°C | 52 mm | 88% | 0.1 m/s | 1.5 |
| 1986 | 1.6°C | -2.5°C | -6.6°C | 11.4°C | -14.6°C | 159 mm | 88% | 0.1 m/s | 1.6 |
| 1985 | -0.7°C | -5.3°C | -9.8°C | 8.0°C | -16.6°C | 41 mm | 88% | 0.2 m/s | 1.6 |
| 1984 | 3.3°C | -0.6°C | -4.6°C | 12.9°C | -15.1°C | 82 mm | 87% | 0.1 m/s | 1.3 |
| 1983 | -0.5°C | -4.6°C | -8.7°C | 9.6°C | -22.9°C | 158 mm | 88% | 0.1 m/s | — |
| 1982 | 3.9°C | -0.2°C | -4.2°C | 17.6°C | -14.8°C | 43 mm | 83% | 0.1 m/s | — |
| 1981 | -1.2°C | -4.8°C | -8.4°C | 6.6°C | -23.1°C | 144 mm | 97% | 0.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 2°C with lows near -6°C (mean -2°C), based on 45 years of NASA POWER data.
December averages 104 mm of rainfall in Worcester, about average for rainfall. The wettest on record was 204 mm in 2023.
The hottest December reached 19.6°C in 2015. The coldest dipped to -24.1°C in 2017.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 2.2°C. Daytime highs moved from 1°C to 3.2°C and overnight lows from -7.1°C to -4.9°C over the same span.
December is one of the cooler months of the year in Worcester and about average for rainfall, so plan for around 2°C daytime highs and -6°C at night.
Not quite — December is the 3rd coolest month in Worcester, averaging -2°C.
For December in Worcester, pack warm layers and a jacket for chilly mornings, with typical highs of 2°C and lows of -6°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 87% — quite humid.
Average wind speed in December is 0.1 m/s. The windiest December on record averaged 0.2 m/s (1985).
The wettest December on record was 2023 with 204 mm. On average, December sees 104 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 Worcester 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.
