December is one of the cooler months of the year in Worcester, with average highs near 7°C and lows around 2°C (mean 4.5°C). It is a relatively wet time of year, averaging 77 mm of rainfall and 95% 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 9°C — while the coldest was 2010 at -0.6°C. Typical December days reach 7°C with nights near 2°C. The long-term trend is warming, about 0.5°C per decade.
December is a relatively wet time of year in Worcester, averaging 77 mm of rainfall. The wettest December on record was 2023 with 145 mm, while the driest was 1988 at 18 mm.
Relative humidity in Worcester during December averages 95%. The most humid December was 2016 at 97%, and the least humid was 2011 at 93%.
December receives about 0.6 kWh/m²/day of solar energy in Worcester. The sunniest Decembers were 2008, 2014 and 2022 at 0.7 kWh/m²/day, and the cloudiest were 1997, 1998 and 2015 at 0.4.
Average wind speed in Worcester during December is 3.5 m/s. The windiest December was 2015 at 5.2 m/s, while the calmest was 2010 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 4.2°C | 3.8°C | 4.3°C | 5.1°C | 5.6°C | +1.4°C |
| Avg High | 6.7°C | 6.2°C | 6.7°C | 7.6°C | 7.9°C | +1.2°C |
| Avg Low | 1.8°C | 1.3°C | 1.8°C | 2.5°C | 3.3°C | +1.5°C |
| Avg Rain | 71 mm | 72 mm | 68 mm | 81 mm | 104 mm | +33 mm |
December temperatures in Worcester have risen by about 2.1°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -9.8°C (1981) to a record high of 13.8°C (2015).
Rainfall in December is a relatively wet time of year, averaging 77 mm, with a wettest year of 145 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 7°C and nights around 2°C (mean 4.5°C) and moderate rainfall (77 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 | 8.5°C | 6.2°C | 3.8°C | 13.4°C | -2.2°C | 118 mm | 95% | 3.8 m/s | — |
| 2024 | 8.5°C | 6.2°C | 4.0°C | 13.7°C | 0.9°C | 75 mm | 95% | 3.8 m/s | 0.5 |
| 2023 🌧️ | 8.8°C | 6.6°C | 4.4°C | 12.7°C | -3.3°C | 145 mm | 94% | 4.3 m/s | 0.5 |
| 2022 | 6.1°C | 3.8°C | 1.4°C | 12.4°C | -5.8°C | 68 mm | 97% | 3.1 m/s | 0.7 |
| 2021 | 8.5°C | 6.1°C | 3.7°C | 13.6°C | -3.1°C | 79 mm | 95% | 3.4 m/s | 0.5 |
| 2020 | 7.1°C | 4.8°C | 2.4°C | 12.2°C | -2.4°C | 136 mm | 96% | 3.4 m/s | 0.5 |
| 2019 | 8.0°C | 5.5°C | 3.1°C | 12.0°C | -1.7°C | 100 mm | 96% | 3.5 m/s | 0.6 |
| 2018 | 8.9°C | 6.4°C | 4.0°C | 12.6°C | -2.9°C | 111 mm | 96% | 3.4 m/s | 0.5 |
| 2017 | 6.7°C | 4.2°C | 1.6°C | 11.8°C | -5.2°C | 108 mm | 96% | 3.4 m/s | 0.6 |
| 2016 | 8.3°C | 5.8°C | 3.4°C | 13.3°C | -1.4°C | 38 mm | 97% | 2.6 m/s | 0.6 |
| 2015 🔥 | 11.4°C | 9.0°C | 6.7°C | 13.8°C | 2.1°C | 123 mm | 93% | 5.2 m/s | 0.4 |
| 2014 | 7.6°C | 4.7°C | 1.9°C | 11.7°C | -3.6°C | 45 mm | 94% | 3.7 m/s | 0.7 |
| 2013 | 8.7°C | 5.7°C | 2.7°C | 12.1°C | -0.2°C | 64 mm | 94% | 3.9 m/s | 0.6 |
| 2012 | 7.0°C | 4.4°C | 1.9°C | 11.7°C | -3.6°C | 121 mm | 96% | 3.6 m/s | 0.6 |
| 2011 | 8.2°C | 5.6°C | 2.9°C | 11.7°C | -1.7°C | 71 mm | 93% | 4.2 m/s | 0.6 |
| 2010 ❄️ | 1.6°C | -0.6°C | -2.8°C | 6.5°C | -6.9°C | 25 mm | 97% | 2.4 m/s | 0.6 |
| 2009 | 4.9°C | 2.7°C | 0.5°C | 11.1°C | -4.3°C | 75 mm | 96% | 3.1 m/s | 0.6 |
| 2008 | 5.6°C | 3.0°C | 0.5°C | 11.7°C | -3.6°C | 47 mm | 96% | 2.8 m/s | 0.7 |
| 2007 | 7.1°C | 4.4°C | 1.6°C | 13.3°C | -3.9°C | 58 mm | 94% | 3.8 m/s | 0.6 |
| 2006 | 8.5°C | 6.3°C | 4.1°C | 12.8°C | -0.2°C | 73 mm | 93% | 4 m/s | 0.5 |
| 2005 | 6.8°C | 4.3°C | 1.8°C | 10.6°C | -3.5°C | 57 mm | 95% | 3 m/s | 0.6 |
| 2004 | 7.5°C | 4.9°C | 2.2°C | 11.4°C | -2.9°C | 44 mm | 96% | 2.8 m/s | 0.6 |
| 2003 | 6.9°C | 4.4°C | 1.8°C | 11.9°C | -4.2°C | 86 mm | 95% | 3.2 m/s | 0.5 |
| 2002 | 6.6°C | 4.6°C | 2.6°C | 11.7°C | -2.6°C | 98 mm | 95% | 3.4 m/s | 0.5 |
| 2001 | 5.6°C | 2.8°C | 0.1°C | 12.4°C | -3.6°C | 31 mm | 95% | 3 m/s | 0.6 |
| 2000 | 7.1°C | 5.1°C | 3.2°C | 12.7°C | -3.5°C | 112 mm | 96% | 4 m/s | 0.5 |
| 1999 | 6.8°C | 4.5°C | 2.1°C | 11.9°C | -5.0°C | 93 mm | 94% | 4.2 m/s | 0.6 |
| 1998 | 7.8°C | 5.2°C | 2.5°C | 13.0°C | -3.7°C | 81 mm | 96% | 3.5 m/s | 0.4 |
| 1997 | 7.3°C | 5.1°C | 2.9°C | 12.6°C | -2.0°C | 85 mm | 95% | 3.6 m/s | 0.4 |
| 1996 | 4.2°C | 1.8°C | -0.6°C | 10.5°C | -5.4°C | 34 mm | 95% | 3 m/s | 0.6 |
| 1995 | 3.2°C | 0.9°C | -1.4°C | 11.7°C | -7.7°C | 92 mm | 96% | 2.9 m/s | 0.5 |
| 1994 | 8.5°C | 6.0°C | 3.4°C | 13.5°C | -3.0°C | 87 mm | 94% | 4.2 m/s | 0.6 |
| 1993 | 7.1°C | 4.5°C | 1.9°C | 12.4°C | -3.5°C | 107 mm | 93% | 4.6 m/s | 0.6 |
| 1992 | 5.4°C | 2.8°C | 0.2°C | 12.6°C | -4.0°C | 58 mm | 96% | 2.9 m/s | 0.6 |
| 1991 | 6.1°C | 3.8°C | 1.4°C | 12.3°C | -5.5°C | 23 mm | 94% | 3 m/s | 0.6 |
| 1990 | 5.9°C | 3.2°C | 0.5°C | 11.4°C | -4.0°C | 64 mm | 94% | 3.7 m/s | 0.6 |
| 1989 | 6.0°C | 3.8°C | 1.6°C | 12.0°C | -2.8°C | 123 mm | 96% | 3.3 m/s | 0.6 |
| 1988 | 8.7°C | 6.3°C | 3.8°C | 12.1°C | -0.8°C | 18 mm | 94% | 3.3 m/s | 0.5 |
| 1987 | 6.8°C | 4.7°C | 2.6°C | 12.5°C | -3.7°C | 39 mm | 96% | 3.5 m/s | 0.5 |
| 1986 | 7.8°C | 4.9°C | 2.0°C | 13.7°C | -2.5°C | 81 mm | 94% | 4.4 m/s | 0.5 |
| 1985 | 8.0°C | 5.9°C | 3.8°C | 13.2°C | -5.8°C | 94 mm | 95% | 3.6 m/s | 0.5 |
| 1984 | 7.1°C | 4.5°C | 1.9°C | 11.7°C | -3.0°C | 69 mm | 96% | 2.7 m/s | 0.6 |
| 1983 | 7.6°C | 4.8°C | 2.1°C | 12.6°C | -3.1°C | 69 mm | 94% | 3.8 m/s | — |
| 1982 | 6.2°C | 3.5°C | 0.8°C | 11.1°C | -3.6°C | 64 mm | 95% | 3.5 m/s | — |
| 1981 | 2.4°C | -0.2°C | -2.8°C | 11.3°C | -9.8°C | 79 mm | 96% | 3 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 7°C with lows near 2°C (mean 4.5°C), based on 45 years of NASA POWER data.
December averages 77 mm of rainfall in Worcester, a relatively wet time of year. The wettest on record was 145 mm in 2023.
The hottest December reached 13.8°C in 2015. The coldest dipped to -9.8°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 2.1°C. Daytime highs moved from 6.3°C to 8.1°C and overnight lows from 1.2°C to 3.5°C over the same span.
December is one of the cooler months of the year in Worcester and a relatively wet time of year, so plan for around 7°C daytime highs and 2°C at night.
Not quite — December is the 3rd coolest month in Worcester, averaging 4.5°C.
For December in Worcester, pack warm layers and a jacket for chilly mornings, with typical highs of 7°C and lows of 2°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 95% — quite humid.
Average wind speed in December is 3.5 m/s. The windiest December on record averaged 5.2 m/s (2015).
The wettest December on record was 2023 with 145 mm. On average, December sees 77 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.
