January is one of the cooler months of the year in Jacksonville, with average highs near 17.5°C and lows around 5.9°C (mean 11.7°C). It is one of the drier months, averaging 88 mm of rainfall and 81% relative humidity across the period.
January is one of the cooler months of the year in Jacksonville. Across 45 years of records, the warmest January in Jacksonville was 2013 — when the month averaged 15.8°C — while the coldest was 1981 at 7.7°C. Typical January days reach 17.5°C with nights near 5.9°C. The long-term trend is warming, about 0.3°C per decade.
January is one of the drier months in Jacksonville, averaging 88 mm of rainfall. The wettest January on record was 1991 with 258 mm, while the driest was 2012 at 16 mm.
Relative humidity in Jacksonville during January averages 81%. The most humid January was 1993 at 89%, and the least humid was 1985 at 66%.
January receives about 3 kWh/m²/day of solar energy in Jacksonville. The sunniest Januarys were 2003 and 2012 at 3.5 kWh/m²/day, and the cloudiest was 1993 at 2.2.
Average wind speed in Jacksonville during January is 0.6 m/s. The windiest Januarys were 2022, 2024 and 2025, among others at 0.7 m/s, while the calmest were 2019, 2021 and 2023, among others at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.4°C | 12.5°C | 12.0°C | 11.4°C | 12.3°C | +1.9°C |
| Avg High | 16.3°C | 17.9°C | 18.0°C | 17.2°C | 18.3°C | +2°C |
| Avg Low | 4.6°C | 7.1°C | 5.9°C | 5.5°C | 6.3°C | +1.7°C |
| Avg Rain | 87 mm | 127 mm | 61 mm | 89 mm | 65 mm | -23 mm |
January temperatures in Jacksonville have risen by about 2.3°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -11.1°C (1985) to a record high of 28.7°C (2023).
Rainfall in January is one of the drier months, averaging 88 mm, with a wettest year of 258 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, January — with days averaging 17.5°C and nights around 5.9°C (mean 11.7°C) and higher rainfall (88 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 | 15.0°C | 8.5°C | 2.1°C | 24.5°C | -5.4°C | 120 mm | 75% | 0.7 m/s | 3.2 |
| 2024 | 17.6°C | 11.9°C | 6.2°C | 25.7°C | -3.8°C | 89 mm | 85% | 0.7 m/s | 2.9 |
| 2023 | 21.6°C | 14.9°C | 8.2°C | 28.7°C | -2.0°C | 55 mm | 76% | 0.6 m/s | 3.4 |
| 2022 | 17.3°C | 11.5°C | 5.7°C | 27.0°C | -4.9°C | 37 mm | 79% | 0.7 m/s | 3.3 |
| 2021 | 18.5°C | 12.7°C | 6.9°C | 26.6°C | -0.7°C | 57 mm | 82% | 0.6 m/s | 3 |
| 2020 | 19.5°C | 14.2°C | 8.9°C | 26.6°C | -1.9°C | 29 mm | 82% | 0.7 m/s | 3.1 |
| 2019 | 17.5°C | 11.8°C | 6.2°C | 26.1°C | -0.9°C | 95 mm | 83% | 0.6 m/s | 3.3 |
| 2018 | 14.7°C | 8.9°C | 3.0°C | 24.0°C | -7.2°C | 94 mm | 79% | 0.7 m/s | 3 |
| 2017 | 21.2°C | 15.2°C | 9.3°C | 26.7°C | -3.7°C | 96 mm | 81% | 0.6 m/s | 3.2 |
| 2016 | 16.5°C | 10.9°C | 5.3°C | 25.1°C | -3.6°C | 83 mm | 79% | 0.7 m/s | 2.7 |
| 2015 | 16.7°C | 11.2°C | 5.7°C | 26.0°C | -4.6°C | 85 mm | 85% | 0.6 m/s | 3 |
| 2014 | 14.1°C | 8.6°C | 3.1°C | 24.9°C | -5.4°C | 153 mm | 83% | 0.7 m/s | 2.7 |
| 2013 🔥 | 21.4°C | 15.8°C | 10.2°C | 27.5°C | 0.9°C | 19 mm | 81% | 0.6 m/s | 3.1 |
| 2012 | 20.4°C | 13.7°C | 6.9°C | 26.3°C | -3.9°C | 16 mm | 72% | 0.6 m/s | 3.5 |
| 2011 | 15.5°C | 9.3°C | 3.0°C | 24.2°C | -5.6°C | 125 mm | 78% | 0.6 m/s | 3.1 |
| 2010 | 13.8°C | 8.3°C | 2.7°C | 23.1°C | -5.4°C | 124 mm | 80% | 0.7 m/s | 3.1 |
| 2009 | 18.2°C | 11.8°C | 5.3°C | 25.8°C | -5.3°C | 77 mm | 74% | 0.6 m/s | 3.1 |
| 2008 | 17.6°C | 11.9°C | 6.1°C | 25.6°C | -5.4°C | 77 mm | 80% | 0.6 m/s | 2.9 |
| 2007 | 18.5°C | 13.6°C | 8.6°C | 26.5°C | -1.8°C | 84 mm | 80% | 0.6 m/s | 2.8 |
| 2006 | 18.7°C | 13.3°C | 7.9°C | 24.7°C | -0.5°C | 78 mm | 85% | 0.7 m/s | 3.3 |
| 2005 | 18.4°C | 13.2°C | 8.0°C | 25.2°C | -5.7°C | 40 mm | 85% | 0.7 m/s | 3 |
| 2004 | 19.1°C | 12.3°C | 5.4°C | 26.9°C | -2.5°C | 32 mm | 70% | 0.6 m/s | 3.2 |
| 2003 | 14.4°C | 8.1°C | 1.8°C | 21.5°C | -7.0°C | 20 mm | 80% | 0.7 m/s | 3.5 |
| 2002 | 18.8°C | 12.8°C | 6.9°C | 27.5°C | -4.6°C | 99 mm | 81% | 0.6 m/s | 3 |
| 2001 | 17.0°C | 10.1°C | 3.2°C | 27.7°C | -5.2°C | 33 mm | 75% | 0.6 m/s | 3.2 |
| 2000 | 19.2°C | 12.7°C | 6.2°C | 27.0°C | -4.6°C | 74 mm | 74% | 0.7 m/s | 3 |
| 1999 | 20.1°C | 13.8°C | 7.4°C | 26.5°C | -5.3°C | 128 mm | 79% | 0.7 m/s | 3.2 |
| 1998 | 18.2°C | 13.1°C | 8.0°C | 25.4°C | -2.5°C | 122 mm | 89% | 0.6 m/s | 3.1 |
| 1997 | 17.6°C | 12.2°C | 6.8°C | 23.8°C | -5.0°C | 83 mm | 84% | 0.6 m/s | 3 |
| 1996 | 17.4°C | 11.0°C | 4.7°C | 26.2°C | -5.4°C | 37 mm | 80% | 0.7 m/s | 3.1 |
| 1995 | 16.1°C | 10.8°C | 5.6°C | 22.5°C | -1.9°C | 83 mm | 85% | 0.7 m/s | 2.9 |
| 1994 | 15.7°C | 10.5°C | 5.2°C | 22.9°C | -4.2°C | 207 mm | 86% | 0.7 m/s | 2.8 |
| 1993 | 19.5°C | 15.1°C | 10.8°C | 25.8°C | -0.8°C | 142 mm | 89% | 0.6 m/s | 2.2 |
| 1992 | 16.0°C | 10.8°C | 5.6°C | 22.2°C | -4.7°C | 149 mm | 83% | 0.6 m/s | 2.8 |
| 1991 🌧️ | 18.6°C | 13.6°C | 8.5°C | 25.5°C | -0.9°C | 258 mm | 86% | 0.6 m/s | 2.3 |
| 1990 | 19.7°C | 13.9°C | 8.2°C | 24.9°C | -0.5°C | 59 mm | 86% | 0.6 m/s | 3.3 |
| 1989 | 21.6°C | 15.4°C | 9.3°C | 26.2°C | 0.1°C | 29 mm | 78% | 0.7 m/s | 3.2 |
| 1988 | 15.0°C | 9.7°C | 4.3°C | 24.2°C | -4.1°C | 137 mm | 81% | 0.6 m/s | 2.5 |
| 1987 | 15.7°C | 10.4°C | 5.0°C | 24.4°C | -2.4°C | 148 mm | 86% | 0.7 m/s | 2.7 |
| 1986 | 15.9°C | 10.3°C | 4.6°C | 21.7°C | -7.4°C | 116 mm | 84% | 0.6 m/s | 2.9 |
| 1985 | 15.8°C | 9.1°C | 2.4°C | 25.7°C | -11.1°C | 36 mm | 66% | 0.7 m/s | 3.2 |
| 1984 | 15.4°C | 10.1°C | 4.9°C | 23.8°C | -5.0°C | 65 mm | 87% | 0.6 m/s | 2.8 |
| 1983 | 15.7°C | 10.2°C | 4.8°C | 22.4°C | -2.6°C | 146 mm | 83% | 0.6 m/s | — |
| 1982 | 17.1°C | 11.1°C | 5.1°C | 25.0°C | -7.3°C | 84 mm | 79% | 0.7 m/s | — |
| 1981 ❄️ | 14.7°C | 7.7°C | 0.7°C | 20.6°C | -6.2°C | 25 mm | 67% | 0.6 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 17.5°C with lows near 5.9°C (mean 11.7°C), based on 45 years of NASA POWER data.
January averages 88 mm of rainfall in Jacksonville, one of the drier months. The wettest on record was 258 mm in 1991.
The hottest January reached 28.7°C in 2023. The coldest dipped to -11.1°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 2.3°C. Daytime highs moved from 15.7°C to 18°C and overnight lows from 3.6°C to 5.8°C over the same span.
January is one of the cooler months of the year in Jacksonville and one of the drier months, so plan for around 17.5°C daytime highs and 5.9°C at night.
Yes — January is the coldest month of the year in Jacksonville, averaging 11.7°C.
For January in Jacksonville, pack warm layers and a jacket for chilly mornings, with typical highs of 17.5°C and lows of 5.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 81% — quite humid.
Average wind speed in January is 0.6 m/s. The windiest January on record averaged 0.7 m/s (1982).
The wettest January on record was 1991 with 258 mm. On average, January sees 88 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 January, 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 January specifically, along with year-by-year records and how the month has changed over the decades.
