December is one of the cooler months of the year in Naples, with average highs near 22.7°C and lows around 18°C (mean 20.4°C). It is one of the drier months, averaging 50 mm of rainfall and 82% relative humidity across the period.
December is one of the cooler months of the year in Naples. Across 45 years of records, the warmest December in Naples was 2015 — when the month averaged 23.5°C — while the coldest was 2010 at 15.6°C. Typical December days reach 22.7°C with nights near 18°C. The long-term trend is warming, about 0.2°C per decade.
December is one of the drier months in Naples, averaging 50 mm of rainfall. The wettest December on record was 2002 with 189 mm, while the driest was 1984 at 7 mm.
Relative humidity in Naples during December averages 82%. The most humid December was 2015 at 89%, and the least humid was 2010 at 73%.
December receives about 3.4 kWh/m²/day of solar energy in Naples. The sunniest Decembers were 2010 and 2017 at 3.8 kWh/m²/day, and the cloudiest were 1986 and 2023 at 2.9.
Average wind speed in Naples during December is 3.9 m/s. The windiest December was 1982 at 4.9 m/s, while the calmest was 2021 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.9°C | 20.4°C | 20.1°C | 20.7°C | 20.6°C | +0.7°C |
| Avg High | 22.3°C | 22.7°C | 22.6°C | 23.0°C | 23.0°C | +0.7°C |
| Avg Low | 17.6°C | 18.0°C | 17.7°C | 18.4°C | 18.2°C | +0.6°C |
| Avg Rain | 49 mm | 40 mm | 63 mm | 54 mm | 43 mm | -6 mm |
December temperatures in Naples have risen by about 1.1°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 3.4°C (1983) to a record high of 26.8°C (2019).
Rainfall in December is one of the drier months, averaging 50 mm, with a wettest year of 189 mm.
One of the best times to visit Naples
December is one of the best times to visit Naples. Expect days averaging 22.7°C and nights around 18°C (mean 20.4°C) — cooler than Naples's yearly average — with moderate rainfall (50 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 23.9°C | 21.5°C | 19.0°C | 25.8°C | 10.9°C | 24 mm | 84% | 3.3 m/s | — |
| 2024 | 22.4°C | 19.8°C | 17.2°C | 25.4°C | 10.9°C | 37 mm | 84% | 3.8 m/s | 3.6 |
| 2023 | 22.4°C | 20.4°C | 18.4°C | 26.0°C | 14.0°C | 91 mm | 84% | 4.4 m/s | 2.9 |
| 2022 | 23.2°C | 20.8°C | 18.3°C | 26.5°C | 8.9°C | 46 mm | 84% | 3.6 m/s | 3.3 |
| 2021 | 24.7°C | 22.4°C | 20.0°C | 26.5°C | 14.3°C | 17 mm | 84% | 2.5 m/s | 3.7 |
| 2020 | 21.5°C | 18.8°C | 16.0°C | 24.5°C | 9.9°C | 42 mm | 82% | 4 m/s | 3.7 |
| 2019 | 23.7°C | 21.5°C | 19.4°C | 26.8°C | 13.6°C | 150 mm | 84% | 4 m/s | 3.2 |
| 2018 | 22.6°C | 20.4°C | 18.2°C | 25.7°C | 12.2°C | 49 mm | 82% | 4.1 m/s | 3.5 |
| 2017 | 23.2°C | 20.8°C | 18.5°C | 25.7°C | 11.3°C | 23 mm | 83% | 2.9 m/s | 3.8 |
| 2016 | 24.5°C | 22.3°C | 20.2°C | 26.3°C | 13.3°C | 22 mm | 86% | 3.5 m/s | 3.5 |
| 2015 🔥 | 25.4°C | 23.5°C | 21.7°C | 26.7°C | 14.9°C | 135 mm | 89% | 3.8 m/s | 3.1 |
| 2014 | 22.2°C | 20.0°C | 17.8°C | 24.9°C | 12.8°C | 24 mm | 83% | 3 m/s | 3.4 |
| 2013 | 24.1°C | 21.9°C | 19.7°C | 26.0°C | 14.9°C | 36 mm | 85% | 3.7 m/s | 3.2 |
| 2012 | 22.9°C | 20.3°C | 17.8°C | 24.9°C | 10.8°C | 49 mm | 83% | 3.3 m/s | 3.4 |
| 2011 | 23.3°C | 20.9°C | 18.5°C | 24.9°C | 13.0°C | 22 mm | 81% | 3.6 m/s | 3.5 |
| 2010 ❄️ | 18.6°C | 15.6°C | 12.6°C | 23.3°C | 7.1°C | 26 mm | 73% | 4.5 m/s | 3.8 |
| 2009 | 22.9°C | 20.6°C | 18.2°C | 26.0°C | 10.1°C | 99 mm | 84% | 3.9 m/s | 3.1 |
| 2008 | 22.4°C | 19.8°C | 17.3°C | 24.0°C | 11.1°C | 27 mm | 82% | 3.6 m/s | 3.7 |
| 2007 | 24.3°C | 21.9°C | 19.5°C | 26.2°C | 11.5°C | 27 mm | 83% | 3.2 m/s | 3.6 |
| 2006 | 23.9°C | 21.7°C | 19.5°C | 25.8°C | 13.7°C | 66 mm | 84% | 4 m/s | 3 |
| 2005 | 21.5°C | 19.2°C | 16.8°C | 24.8°C | 11.5°C | 23 mm | 82% | 3.6 m/s | 3.5 |
| 2004 | 22.4°C | 19.6°C | 16.9°C | 25.9°C | 8.5°C | 47 mm | 80% | 4.4 m/s | 3.4 |
| 2003 | 20.9°C | 18.1°C | 15.4°C | 24.0°C | 8.4°C | 84 mm | 82% | 4.2 m/s | 3.5 |
| 2002 🌧️ | 21.8°C | 19.1°C | 16.4°C | 24.7°C | 11.0°C | 189 mm | 82% | 4.3 m/s | 3.1 |
| 2001 | 23.8°C | 21.7°C | 19.6°C | 26.1°C | 13.5°C | 45 mm | 82% | 3.6 m/s | 3.3 |
| 2000 | 22.3°C | 19.7°C | 17.0°C | 25.8°C | 7.5°C | 19 mm | 78% | 4.5 m/s | 3.5 |
| 1999 | 22.6°C | 20.3°C | 18.0°C | 25.0°C | 10.4°C | 29 mm | 80% | 3.7 m/s | 3.4 |
| 1998 | 24.5°C | 22.2°C | 20.0°C | 26.4°C | 13.4°C | 39 mm | 82% | 4 m/s | 3.6 |
| 1997 | 22.2°C | 20.2°C | 18.1°C | 25.2°C | 12.5°C | 133 mm | 82% | 4.6 m/s | 3.1 |
| 1996 | 22.9°C | 20.2°C | 17.5°C | 24.9°C | 7.3°C | 18 mm | 80% | 3.9 m/s | 3.6 |
| 1995 | 21.0°C | 18.7°C | 16.5°C | 24.3°C | 9.2°C | 23 mm | 83% | 4.1 m/s | 3.3 |
| 1994 | 23.2°C | 21.2°C | 19.1°C | 26.6°C | 14.1°C | 91 mm | 83% | 4.4 m/s | 3.3 |
| 1993 | 21.4°C | 18.6°C | 15.8°C | 25.0°C | 10.3°C | 25 mm | 80% | 4.3 m/s | 3.5 |
| 1992 | 22.8°C | 20.5°C | 18.2°C | 24.7°C | 12.3°C | 17 mm | 83% | 3.6 m/s | 3.3 |
| 1991 | 22.7°C | 20.4°C | 18.1°C | 25.5°C | 11.5°C | 11 mm | 83% | 4 m/s | 3.5 |
| 1990 | 23.8°C | 21.4°C | 19.0°C | 25.8°C | 13.4°C | 10 mm | 79% | 4.2 m/s | 3.5 |
| 1989 | 20.5°C | 17.9°C | 15.3°C | 24.3°C | 4.7°C | 71 mm | 79% | 4 m/s | 3.2 |
| 1988 | 22.6°C | 19.9°C | 17.2°C | 24.6°C | 8.8°C | 12 mm | 79% | 3.9 m/s | 3.6 |
| 1987 | 22.3°C | 19.9°C | 17.6°C | 24.6°C | 9.8°C | 13 mm | 81% | 4 m/s | 3.3 |
| 1986 | 23.9°C | 21.9°C | 19.9°C | 26.4°C | 14.1°C | 114 mm | 83% | 4.4 m/s | 2.9 |
| 1985 | 21.4°C | 18.7°C | 16.0°C | 25.9°C | 7.1°C | 26 mm | 76% | 4.4 m/s | 3.2 |
| 1984 | 22.9°C | 20.7°C | 18.6°C | 25.0°C | 10.4°C | 7 mm | 81% | 3.8 m/s | 3.2 |
| 1983 | 22.2°C | 19.8°C | 17.4°C | 26.0°C | 3.4°C | 124 mm | 87% | 4.4 m/s | — |
| 1982 | 23.3°C | 21.3°C | 19.3°C | 26.3°C | 9.8°C | 40 mm | 82% | 4.9 m/s | — |
| 1981 | 21.5°C | 19.1°C | 16.8°C | 25.5°C | 7.5°C | 35 mm | 78% | 4.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 22.7°C with lows near 18°C (mean 20.4°C), based on 45 years of NASA POWER data.
December averages 50 mm of rainfall in Naples, one of the drier months. The wettest on record was 189 mm in 2002.
The hottest December reached 26.8°C in 2019. The coldest dipped to 3.4°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.1°C. Daytime highs moved from 22.3°C to 23.3°C and overnight lows from 17.6°C to 18.6°C over the same span.
December is one of the cooler months of the year in Naples and one of the drier months, so plan for around 22.7°C daytime highs and 18°C at night.
Not quite — December is the 3rd coolest month in Naples, averaging 20.4°C.
For December in Naples, pack light layers you can adjust through the day, with typical highs of 22.7°C and lows of 18°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 82% — quite humid.
Average wind speed in December is 3.9 m/s. The windiest December on record averaged 4.9 m/s (1982).
The wettest December on record was 2002 with 189 mm. On average, December sees 50 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 Naples 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.
