December is one of the cooler months of the year in Jacksonville, with average highs near 19.3°C and lows around 8°C (mean 13.7°C). It is one of the drier months, averaging 72 mm of rainfall and 82% relative humidity across the period.
December is one of the cooler months of the year in Jacksonville. Across 45 years of records, the warmest December in Jacksonville was 2015 — when the month averaged 19.3°C — while the coldest was 1989 at 7.9°C. Typical December days reach 19.3°C with nights near 8°C. The long-term trend is warming, about 0.5°C per decade.
December is one of the drier months in Jacksonville, averaging 72 mm of rainfall. The wettest December on record was 1997 with 207 mm, while the driest was 1984 at 11 mm.
Relative humidity in Jacksonville during December averages 82%. The most humid December was 1994 at 90%, and the least humid was 2010 at 63%.
December receives about 2.7 kWh/m²/day of solar energy in Jacksonville. The sunniest Decembers were 1985 and 2010 at 3.1 kWh/m²/day, and the cloudiest was 1986 at 2.
Average wind speed in Jacksonville during December is 0.6 m/s. The windiest Decembers were 2010, 2019 and 2023, among others at 0.7 m/s, while the calmest was 2014 at 0.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.6°C | 13.5°C | 13.2°C | 14.6°C | 14.3°C | +1.7°C |
| Avg High | 18.2°C | 18.9°C | 19.1°C | 20.3°C | 20.1°C | +1.9°C |
| Avg Low | 7.1°C | 8.1°C | 7.4°C | 9.0°C | 8.5°C | +1.4°C |
| Avg Rain | 78 mm | 58 mm | 81 mm | 78 mm | 59 mm | -18 mm |
December temperatures in Jacksonville have risen by about 1.7°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -8.4°C (1983) to a record high of 28.9°C (2022).
Rainfall in December is one of the drier months, averaging 72 mm, with a wettest year of 207 mm.
A quieter season to visit Jacksonville
If your dates are flexible, the more temperate months of October and April tend to be the most comfortable for visiting Jacksonville. That said, December — with days averaging 19.3°C and nights around 8°C (mean 13.7°C) and moderate rainfall (72 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 | 20.8°C | 14.5°C | 8.2°C | 27.0°C | -1.2°C | 56 mm | 77% | 0.6 m/s | — |
| 2024 | 19.8°C | 13.8°C | 7.8°C | 26.6°C | -1.7°C | 37 mm | 81% | 0.6 m/s | 2.8 |
| 2023 | 18.9°C | 14.0°C | 9.2°C | 26.3°C | 1.0°C | 141 mm | 86% | 0.7 m/s | 2.7 |
| 2022 | 20.4°C | 14.3°C | 8.2°C | 28.9°C | -5.6°C | 16 mm | 77% | 0.6 m/s | 2.7 |
| 2021 | 22.6°C | 17.3°C | 12.0°C | 27.4°C | 1.8°C | 53 mm | 89% | 0.6 m/s | 2.9 |
| 2020 | 17.9°C | 11.6°C | 5.3°C | 25.8°C | -4.3°C | 54 mm | 81% | 0.6 m/s | 3 |
| 2019 | 20.6°C | 15.3°C | 10.1°C | 27.6°C | 0.1°C | 137 mm | 85% | 0.7 m/s | 2.6 |
| 2018 | 18.9°C | 14.0°C | 9.1°C | 26.6°C | -0.4°C | 184 mm | 88% | 0.6 m/s | 2.5 |
| 2017 | 18.7°C | 13.2°C | 7.8°C | 25.6°C | -1.8°C | 65 mm | 85% | 0.6 m/s | 2.6 |
| 2016 | 22.3°C | 16.2°C | 10.2°C | 27.6°C | 2.0°C | 72 mm | 79% | 0.6 m/s | 3 |
| 2015 🔥 | 24.2°C | 19.3°C | 14.4°C | 28.3°C | 2.4°C | 34 mm | 86% | 0.6 m/s | 2.8 |
| 2014 | 19.6°C | 14.3°C | 8.9°C | 25.1°C | 0.1°C | 86 mm | 87% | 0.5 m/s | 2.6 |
| 2013 | 21.9°C | 15.8°C | 9.7°C | 28.1°C | 1.4°C | 56 mm | 83% | 0.6 m/s | 2.8 |
| 2012 | 20.4°C | 14.5°C | 8.5°C | 26.2°C | -1.1°C | 78 mm | 82% | 0.6 m/s | 2.6 |
| 2011 | 21.3°C | 15.5°C | 9.8°C | 26.5°C | 2.7°C | 47 mm | 81% | 0.6 m/s | 2.8 |
| 2010 | 15.2°C | 8.1°C | 1.0°C | 23.2°C | -6.0°C | 24 mm | 63% | 0.7 m/s | 3.1 |
| 2009 | 17.8°C | 13.0°C | 8.2°C | 26.1°C | -1.2°C | 133 mm | 86% | 0.6 m/s | 2.2 |
| 2008 | 21.1°C | 15.0°C | 9.0°C | 27.2°C | -0.5°C | 17 mm | 80% | 0.6 m/s | 3 |
| 2007 | 22.1°C | 15.9°C | 9.7°C | 27.4°C | -0.3°C | 56 mm | 81% | 0.6 m/s | 2.9 |
| 2006 | 21.8°C | 16.4°C | 11.0°C | 28.1°C | -0.2°C | 88 mm | 80% | 0.6 m/s | 2.5 |
| 2005 | 16.6°C | 10.8°C | 5.0°C | 24.1°C | -2.5°C | 167 mm | 82% | 0.7 m/s | 2.9 |
| 2004 | 16.4°C | 11.0°C | 5.6°C | 26.1°C | -3.4°C | 75 mm | 86% | 0.6 m/s | 2.8 |
| 2003 | 18.4°C | 11.7°C | 5.0°C | 24.2°C | -2.8°C | 33 mm | 74% | 0.6 m/s | 3 |
| 2002 | 16.8°C | 11.0°C | 5.2°C | 23.6°C | -0.9°C | 146 mm | 86% | 0.6 m/s | 2.7 |
| 2001 | 22.0°C | 16.5°C | 11.0°C | 28.3°C | -1.9°C | 57 mm | 77% | 0.6 m/s | 2.8 |
| 2000 | 17.6°C | 10.9°C | 4.2°C | 27.4°C | -6.0°C | 38 mm | 73% | 0.7 m/s | 2.8 |
| 1999 | 19.3°C | 13.0°C | 6.8°C | 25.3°C | -2.9°C | 28 mm | 76% | 0.6 m/s | 2.8 |
| 1998 | 22.4°C | 16.6°C | 10.7°C | 27.8°C | 0.6°C | 20 mm | 80% | 0.6 m/s | 2.6 |
| 1997 🌧️ | 16.8°C | 12.0°C | 7.1°C | 25.8°C | -2.3°C | 207 mm | 88% | 0.7 m/s | 2.5 |
| 1996 | 18.1°C | 12.8°C | 7.5°C | 24.7°C | -4.8°C | 68 mm | 86% | 0.6 m/s | 2.8 |
| 1995 | 16.8°C | 11.3°C | 5.8°C | 24.1°C | -4.6°C | 51 mm | 82% | 0.6 m/s | 2.7 |
| 1994 | 19.0°C | 14.3°C | 9.7°C | 25.7°C | 3.1°C | 82 mm | 90% | 0.6 m/s | 2.4 |
| 1993 | 15.8°C | 10.5°C | 5.2°C | 24.5°C | -2.5°C | 53 mm | 84% | 0.7 m/s | 2.6 |
| 1992 | 18.6°C | 13.7°C | 8.7°C | 24.8°C | 0.9°C | 18 mm | 87% | 0.6 m/s | 2.5 |
| 1991 | 20.2°C | 14.7°C | 9.1°C | 27.7°C | 0.1°C | 23 mm | 80% | 0.6 m/s | 2.7 |
| 1990 | 22.1°C | 16.2°C | 10.3°C | 27.7°C | 1.1°C | 34 mm | 78% | 0.6 m/s | 2.7 |
| 1989 ❄️ | 13.7°C | 7.9°C | 2.1°C | 22.8°C | -8.4°C | 108 mm | 80% | 0.7 m/s | 2.5 |
| 1988 | 17.7°C | 11.8°C | 5.8°C | 24.5°C | -3.7°C | 34 mm | 81% | 0.6 m/s | 2.8 |
| 1987 | 20.8°C | 14.9°C | 8.9°C | 27.5°C | -1.5°C | 16 mm | 76% | 0.6 m/s | 2.7 |
| 1986 | 18.3°C | 13.9°C | 9.5°C | 24.6°C | 4.5°C | 121 mm | 89% | 0.6 m/s | 2 |
| 1985 | 15.7°C | 9.9°C | 4.1°C | 25.8°C | -7.1°C | 68 mm | 81% | 0.6 m/s | 3.1 |
| 1984 | 22.8°C | 16.7°C | 10.7°C | 26.9°C | -3.0°C | 11 mm | 80% | 0.6 m/s | 2.8 |
| 1983 | 16.5°C | 11.2°C | 5.9°C | 26.9°C | -8.4°C | 187 mm | 83% | 0.7 m/s | — |
| 1982 | 21.1°C | 16.1°C | 11.2°C | 27.4°C | 0.1°C | 67 mm | 82% | 0.7 m/s | — |
| 1981 | 17.3°C | 11.4°C | 5.5°C | 25.9°C | -5.9°C | 88 mm | 75% | 0.6 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 19.3°C with lows near 8°C (mean 13.7°C), based on 45 years of NASA POWER data.
December averages 72 mm of rainfall in Jacksonville, one of the drier months. The wettest on record was 207 mm in 1997.
The hottest December reached 28.9°C in 2022. The coldest dipped to -8.4°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.7°C. Daytime highs moved from 18.7°C to 20.5°C and overnight lows from 7.5°C to 9.1°C over the same span.
December is one of the cooler months of the year in Jacksonville and one of the drier months, so plan for around 19.3°C daytime highs and 8°C at night.
Not quite — December is the 2nd coolest month in Jacksonville, averaging 13.7°C.
For December in Jacksonville, pack light layers you can adjust through the day, with typical highs of 19.3°C and lows of 8°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 82% — quite humid.
Average wind speed in December is 0.6 m/s. The windiest December on record averaged 0.7 m/s (1982).
The wettest December on record was 1997 with 207 mm. On average, December sees 72 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 Jacksonville 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.
