December is one of the cooler months of the year in Rome, with average highs near 11.4°C and lows around 0.8°C (mean 6.1°C). It is a relatively wet time of year, averaging 125 mm of rainfall and 83% relative humidity across the period.
December is one of the cooler months of the year in Rome. Across 45 years of records, the warmest December in Rome was 2015 — when the month averaged 12.2°C — while the coldest was 1989 at 0.5°C. Typical December days reach 11.4°C with nights near 0.8°C. The long-term trend is warming, about 0.7°C per decade.
December is a relatively wet time of year in Rome, averaging 125 mm of rainfall. The wettest December on record was 2015 with 295 mm, while the driest was 2010 at 40 mm.
Relative humidity in Rome during December averages 83%. The most humid December was 2018 at 89%, and the least humid was 2025 at 75%.
December receives about 2.2 kWh/m²/day of solar energy in Rome. The sunniest Decembers were 2004, 2006 and 2020, among others at 2.5 kWh/m²/day, and the cloudiest was 1992 at 1.7.
Average wind speed in Rome during December is 0.1 m/s. The windiest Decembers were 2006, 2011 and 2023 at 0.2 m/s, while the calmest were 2022, 2024 and 2025, 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 | 4.7°C | 6.1°C | 5.5°C | 7.2°C | 7.5°C | +2.8°C |
| Avg High | 9.9°C | 11.3°C | 10.9°C | 12.3°C | 13.3°C | +3.4°C |
| Avg Low | -0.5°C | 1.0°C | 0.0°C | 2.0°C | 1.8°C | +2.3°C |
| Avg Rain | 120 mm | 119 mm | 119 mm | 151 mm | 106 mm | -14 mm |
December temperatures in Rome have risen by about 2.9°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -16.8°C (1983) to a record high of 24.5°C (2007).
Rainfall in December is a relatively wet time of year, averaging 125 mm, with a wettest year of 295 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.8°C per decade while lows rose 0.6°C per decade, widening the gap between day and night.
A quieter season to visit Rome
If your dates are flexible, the more temperate months of September and May tend to be the most comfortable for visiting Rome. That said, December — with days averaging 11.4°C and nights around 0.8°C (mean 6.1°C) and higher rainfall (125 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 | 13.4°C | 7.1°C | 0.8°C | 24.0°C | -7.6°C | 43 mm | 75% | 0.1 m/s | — |
| 2024 | 12.1°C | 6.6°C | 1.1°C | 21.3°C | -6.5°C | 117 mm | 80% | 0.1 m/s | 2.4 |
| 2023 | 14.0°C | 7.9°C | 1.8°C | 19.9°C | -5.5°C | 128 mm | 77% | 0.2 m/s | 2.4 |
| 2022 | 11.7°C | 6.7°C | 1.7°C | 23.1°C | -13.0°C | 124 mm | 84% | 0.1 m/s | 2.1 |
| 2021 | 17.4°C | 11.4°C | 5.4°C | 22.9°C | -3.5°C | 120 mm | 85% | 0.1 m/s | 2 |
| 2020 | 11.0°C | 5.4°C | -0.2°C | 18.1°C | -6.6°C | 103 mm | 84% | 0.1 m/s | 2.5 |
| 2019 | 13.7°C | 8.5°C | 3.2°C | 21.7°C | -4.3°C | 145 mm | 85% | 0.1 m/s | 2.2 |
| 2018 | 10.6°C | 6.4°C | 2.3°C | 20.7°C | -4.7°C | 232 mm | 89% | 0.1 m/s | 1.8 |
| 2017 | 11.0°C | 5.8°C | 0.6°C | 21.5°C | -7.1°C | 87 mm | 80% | 0.1 m/s | 2.1 |
| 2016 | 12.8°C | 6.9°C | 1.0°C | 23.1°C | -5.9°C | 91 mm | 79% | 0.1 m/s | 2.1 |
| 2015 🔥 🌧️ | 17.0°C | 12.2°C | 7.3°C | 23.9°C | -4.4°C | 295 mm | 89% | 0.1 m/s | 2.1 |
| 2014 | 12.8°C | 7.6°C | 2.5°C | 20.4°C | -4.5°C | 117 mm | 87% | 0.1 m/s | 2 |
| 2013 | 11.7°C | 6.6°C | 1.5°C | 23.7°C | -6.0°C | 210 mm | 86% | 0.1 m/s | 2 |
| 2012 | 14.1°C | 8.7°C | 3.2°C | 22.4°C | -5.0°C | 158 mm | 82% | 0.1 m/s | 2 |
| 2011 | 13.4°C | 7.8°C | 2.2°C | 19.7°C | -5.0°C | 133 mm | 86% | 0.2 m/s | 2.2 |
| 2010 | 6.2°C | 1.2°C | -3.9°C | 13.8°C | -11.7°C | 40 mm | 78% | 0.1 m/s | 2.3 |
| 2009 | 8.8°C | 4.1°C | -0.6°C | 18.6°C | -5.3°C | 188 mm | 88% | 0.1 m/s | 1.9 |
| 2008 | 11.8°C | 6.6°C | 1.5°C | 19.0°C | -9.5°C | 191 mm | 84% | 0.1 m/s | 2 |
| 2007 | 14.5°C | 8.7°C | 3.0°C | 24.5°C | -5.8°C | 94 mm | 81% | 0.1 m/s | 2.1 |
| 2006 | 14.2°C | 7.9°C | 1.6°C | 19.9°C | -7.1°C | 72 mm | 81% | 0.2 m/s | 2.5 |
| 2005 | 8.9°C | 3.5°C | -1.9°C | 17.1°C | -6.2°C | 101 mm | 83% | 0.1 m/s | 2.3 |
| 2004 | 10.8°C | 5.3°C | -0.3°C | 21.7°C | -7.5°C | 128 mm | 82% | 0.1 m/s | 2.5 |
| 2003 | 10.2°C | 4.1°C | -1.9°C | 16.4°C | -6.0°C | 87 mm | 81% | 0.1 m/s | 2.4 |
| 2002 | 9.8°C | 4.7°C | -0.3°C | 16.0°C | -5.9°C | 177 mm | 87% | 0.1 m/s | 2.2 |
| 2001 | 13.8°C | 8.2°C | 2.6°C | 22.7°C | -6.6°C | 94 mm | 79% | 0.1 m/s | 2.5 |
| 2000 | 6.3°C | 1.4°C | -3.5°C | 17.2°C | -10.9°C | 55 mm | 82% | 0.1 m/s | 2.2 |
| 1999 | 12.9°C | 6.6°C | 0.2°C | 20.9°C | -7.0°C | 52 mm | 76% | 0.1 m/s | 2.4 |
| 1998 | 13.8°C | 8.5°C | 3.1°C | 24.4°C | -4.3°C | 141 mm | 85% | 0.1 m/s | 1.9 |
| 1997 | 9.7°C | 4.9°C | 0.1°C | 16.6°C | -6.6°C | 97 mm | 87% | 0.1 m/s | 2.1 |
| 1996 | 11.6°C | 6.4°C | 1.1°C | 21.2°C | -8.2°C | 96 mm | 85% | 0.1 m/s | 2.2 |
| 1995 | 8.8°C | 3.7°C | -1.3°C | 19.0°C | -9.6°C | 82 mm | 83% | 0.1 m/s | 2.3 |
| 1994 | 12.3°C | 7.2°C | 2.1°C | 19.8°C | -5.1°C | 83 mm | 86% | 0.1 m/s | 2.2 |
| 1993 | 9.4°C | 4.7°C | 0.0°C | 17.3°C | -6.4°C | 112 mm | 84% | 0.1 m/s | 2.2 |
| 1992 | 9.2°C | 4.9°C | 0.6°C | 16.6°C | -5.0°C | 167 mm | 89% | 0.1 m/s | 1.7 |
| 1991 | 12.3°C | 6.8°C | 1.4°C | 22.8°C | -6.4°C | 165 mm | 85% | 0.1 m/s | 2.3 |
| 1990 | 12.8°C | 7.5°C | 2.2°C | 21.8°C | -7.0°C | 197 mm | 86% | 0.1 m/s | 1.9 |
| 1989 ❄️ | 5.3°C | 0.5°C | -4.4°C | 15.6°C | -15.4°C | 117 mm | 84% | 0.1 m/s | 2.3 |
| 1988 | 10.7°C | 4.7°C | -1.2°C | 19.2°C | -5.9°C | 74 mm | 83% | 0.1 m/s | 2.4 |
| 1987 | 13.0°C | 7.2°C | 1.3°C | 22.0°C | -5.6°C | 112 mm | 79% | 0.1 m/s | 2 |
| 1986 | 9.5°C | 4.7°C | -0.1°C | 18.3°C | -4.9°C | 89 mm | 88% | 0.1 m/s | 1.9 |
| 1985 | 8.0°C | 2.5°C | -3.0°C | 18.5°C | -13.2°C | 66 mm | 78% | 0.1 m/s | 2.5 |
| 1984 | 15.5°C | 10.0°C | 4.5°C | 22.2°C | -8.0°C | 73 mm | 87% | 0.1 m/s | 2.2 |
| 1983 | 7.7°C | 2.6°C | -2.6°C | 19.5°C | -16.8°C | 242 mm | 84% | 0.1 m/s | — |
| 1982 | 12.7°C | 8.1°C | 3.5°C | 22.9°C | -6.2°C | 177 mm | 88% | 0.1 m/s | — |
| 1981 | 6.6°C | 2.0°C | -2.7°C | 16.2°C | -12.3°C | 131 mm | 84% | 0.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 11.4°C with lows near 0.8°C (mean 6.1°C), based on 45 years of NASA POWER data.
December averages 125 mm of rainfall in Rome, a relatively wet time of year. The wettest on record was 295 mm in 2015.
The hottest December reached 24.5°C in 2007. The coldest dipped to -16.8°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 2.9°C. Daytime highs moved from 10.1°C to 13.7°C and overnight lows from -0.1°C to 2.2°C over the same span.
December is one of the cooler months of the year in Rome and a relatively wet time of year, so plan for around 11.4°C daytime highs and 0.8°C at night.
Not quite — December is the 2nd coolest month in Rome, averaging 6.1°C.
For December in Rome, pack warm layers and a jacket for chilly mornings, with typical highs of 11.4°C and lows of 0.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 83% — quite humid.
Average wind speed in December is 0.1 m/s. The windiest December on record averaged 0.2 m/s (2006).
The wettest December on record was 2015 with 295 mm. On average, December sees 125 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 Rome 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.
