December is one of the cooler months of the year in Fort Myers, with average highs near 23.2°C and lows around 14.9°C (mean 19.1°C). It is one of the drier months, averaging 47 mm of rainfall and 82% relative humidity across the period.
December is one of the cooler months of the year in Fort Myers. Across 45 years of records, the warmest December in Fort Myers was 2015 — when the month averaged 22.8°C — while the coldest was 2010 at 13.8°C. Typical December days reach 23.2°C with nights near 14.9°C. The long-term trend is warming, about 0.4°C per decade.
December is one of the drier months in Fort Myers, averaging 47 mm of rainfall. The wettest December on record was 2019 with 148 mm, while the driest was 1984 at 8 mm.
Relative humidity in Fort Myers during December averages 82%. The most humid December was 2015 at 89%, and the least humid was 2010 at 70%.
December receives about 3.4 kWh/m²/day of solar energy in Fort Myers. 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 Fort Myers during December is 3 m/s. The windiest December was 1982 at 3.6 m/s, while the calmest was 2021 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 18.4°C | 19.0°C | 18.8°C | 19.7°C | 19.5°C | +1.1°C |
| Avg High | 22.5°C | 23.0°C | 23.1°C | 23.8°C | 23.7°C | +1.2°C |
| Avg Low | 14.3°C | 14.8°C | 14.5°C | 15.6°C | 15.3°C | +1°C |
| Avg Rain | 44 mm | 40 mm | 55 mm | 51 mm | 43 mm | -1 mm |
December temperatures in Fort Myers have risen by about 1.5°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -1.9°C (1983) to a record high of 28.2°C (2019).
Rainfall in December is one of the drier months, averaging 47 mm, with a wettest year of 148 mm.
One of the best times to visit Fort Myers
December is one of the best times to visit Fort Myers. Expect days averaging 23.2°C and nights around 14.9°C (mean 19.1°C) — cooler than Fort Myers's yearly average — with moderate rainfall (47 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 | 25.0°C | 20.7°C | 16.3°C | 27.3°C | 6.4°C | 22 mm | 82% | 2.6 m/s | — |
| 2024 | 23.5°C | 19.0°C | 14.6°C | 26.6°C | 7.0°C | 34 mm | 83% | 3 m/s | 3.6 |
| 2023 | 22.9°C | 19.4°C | 16.0°C | 27.7°C | 10.4°C | 93 mm | 83% | 3.5 m/s | 2.9 |
| 2022 | 23.2°C | 19.2°C | 15.2°C | 26.5°C | 3.9°C | 38 mm | 84% | 2.8 m/s | 3.3 |
| 2021 | 25.8°C | 21.6°C | 17.4°C | 28.0°C | 10.4°C | 18 mm | 84% | 2 m/s | 3.7 |
| 2020 | 21.6°C | 17.0°C | 12.5°C | 25.7°C | 5.1°C | 54 mm | 84% | 3 m/s | 3.7 |
| 2019 🌧️ | 24.3°C | 20.5°C | 16.6°C | 28.2°C | 9.5°C | 148 mm | 84% | 3.2 m/s | 3.2 |
| 2018 | 23.1°C | 19.2°C | 15.2°C | 27.2°C | 7.7°C | 64 mm | 83% | 3.2 m/s | 3.5 |
| 2017 | 23.6°C | 19.5°C | 15.4°C | 26.5°C | 6.6°C | 27 mm | 85% | 2.2 m/s | 3.8 |
| 2016 | 25.3°C | 21.5°C | 17.7°C | 28.0°C | 8.4°C | 22 mm | 85% | 2.7 m/s | 3.5 |
| 2015 🔥 | 26.1°C | 22.8°C | 19.6°C | 28.0°C | 11.3°C | 127 mm | 89% | 3 m/s | 3.1 |
| 2014 | 23.5°C | 19.4°C | 15.3°C | 26.2°C | 7.9°C | 16 mm | 82% | 2.4 m/s | 3.4 |
| 2013 | 25.1°C | 21.1°C | 17.1°C | 27.2°C | 10.6°C | 18 mm | 83% | 2.9 m/s | 3.2 |
| 2012 | 23.9°C | 19.4°C | 14.9°C | 26.9°C | 5.7°C | 47 mm | 82% | 2.6 m/s | 3.4 |
| 2011 | 24.3°C | 20.1°C | 15.9°C | 26.7°C | 8.9°C | 17 mm | 80% | 2.7 m/s | 3.5 |
| 2010 ❄️ | 19.0°C | 13.8°C | 8.5°C | 23.8°C | 1.9°C | 25 mm | 70% | 3.4 m/s | 3.8 |
| 2009 | 23.3°C | 19.3°C | 15.4°C | 27.4°C | 5.8°C | 95 mm | 84% | 3.1 m/s | 3.1 |
| 2008 | 23.2°C | 18.8°C | 14.4°C | 25.9°C | 5.9°C | 30 mm | 83% | 2.8 m/s | 3.7 |
| 2007 | 25.6°C | 21.2°C | 16.8°C | 27.8°C | 7.7°C | 29 mm | 81% | 2.5 m/s | 3.6 |
| 2006 | 24.9°C | 21.1°C | 17.3°C | 27.4°C | 10.2°C | 51 mm | 82% | 3.1 m/s | 3 |
| 2005 | 21.6°C | 17.5°C | 13.3°C | 25.6°C | 6.8°C | 17 mm | 84% | 2.8 m/s | 3.5 |
| 2004 | 22.6°C | 18.1°C | 13.6°C | 27.1°C | 4.4°C | 49 mm | 79% | 3.4 m/s | 3.4 |
| 2003 | 21.1°C | 16.5°C | 11.8°C | 25.1°C | 3.2°C | 80 mm | 84% | 3.1 m/s | 3.5 |
| 2002 | 21.8°C | 17.2°C | 12.7°C | 26.2°C | 5.3°C | 144 mm | 84% | 3.3 m/s | 3.1 |
| 2001 | 24.3°C | 20.5°C | 16.6°C | 27.5°C | 8.8°C | 38 mm | 82% | 2.7 m/s | 3.3 |
| 2000 | 22.9°C | 18.2°C | 13.5°C | 27.9°C | 2.7°C | 18 mm | 74% | 3.5 m/s | 3.5 |
| 1999 | 23.2°C | 19.0°C | 14.7°C | 26.5°C | 5.5°C | 31 mm | 81% | 2.8 m/s | 3.4 |
| 1998 | 24.9°C | 20.9°C | 16.8°C | 27.0°C | 8.2°C | 31 mm | 83% | 2.8 m/s | 3.6 |
| 1997 | 22.2°C | 18.6°C | 14.9°C | 26.6°C | 7.8°C | 142 mm | 84% | 3.4 m/s | 3.1 |
| 1996 | 23.6°C | 19.1°C | 14.5°C | 26.5°C | 4.0°C | 18 mm | 78% | 3 m/s | 3.6 |
| 1995 | 20.7°C | 16.7°C | 12.8°C | 25.1°C | 3.4°C | 26 mm | 86% | 3 m/s | 3.3 |
| 1994 | 23.2°C | 19.6°C | 16.1°C | 27.3°C | 9.9°C | 87 mm | 87% | 3.2 m/s | 3.3 |
| 1993 | 21.4°C | 16.8°C | 12.1°C | 25.2°C | 4.4°C | 25 mm | 80% | 3.2 m/s | 3.5 |
| 1992 | 23.2°C | 19.2°C | 15.1°C | 25.9°C | 6.9°C | 16 mm | 85% | 2.7 m/s | 3.3 |
| 1991 | 23.2°C | 19.3°C | 15.4°C | 27.0°C | 6.7°C | 10 mm | 83% | 3 m/s | 3.5 |
| 1990 | 24.7°C | 20.3°C | 16.0°C | 27.6°C | 9.0°C | 9 mm | 77% | 3.1 m/s | 3.5 |
| 1989 | 20.3°C | 15.9°C | 11.5°C | 25.8°C | -0.8°C | 66 mm | 78% | 3.1 m/s | 3.2 |
| 1988 | 23.3°C | 18.5°C | 13.8°C | 26.6°C | 3.1°C | 16 mm | 78% | 2.9 m/s | 3.6 |
| 1987 | 22.6°C | 18.6°C | 14.5°C | 26.1°C | 5.7°C | 11 mm | 82% | 3 m/s | 3.3 |
| 1986 | 24.1°C | 20.6°C | 17.2°C | 27.4°C | 10.4°C | 110 mm | 83% | 3.4 m/s | 2.9 |
| 1985 | 21.3°C | 16.8°C | 12.2°C | 26.6°C | 2.1°C | 25 mm | 75% | 3.3 m/s | 3.2 |
| 1984 | 23.7°C | 19.8°C | 15.9°C | 26.5°C | 6.0°C | 8 mm | 81% | 2.8 m/s | 3.2 |
| 1983 | 21.9°C | 18.1°C | 14.3°C | 26.4°C | -1.9°C | 101 mm | 88% | 3.4 m/s | — |
| 1982 | 23.4°C | 19.9°C | 16.3°C | 27.1°C | 5.3°C | 34 mm | 85% | 3.6 m/s | — |
| 1981 | 22.1°C | 17.7°C | 13.3°C | 27.4°C | 2.5°C | 24 mm | 75% | 3.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 23.2°C with lows near 14.9°C (mean 19.1°C), based on 45 years of NASA POWER data.
December averages 47 mm of rainfall in Fort Myers, one of the drier months. The wettest on record was 148 mm in 2019.
The hottest December reached 28.2°C in 2019. The coldest dipped to -1.9°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.5°C. Daytime highs moved from 22.5°C to 24.1°C and overnight lows from 14.4°C to 15.9°C over the same span.
December is one of the cooler months of the year in Fort Myers and one of the drier months, so plan for around 23.2°C daytime highs and 14.9°C at night.
Not quite — December is the 3rd coolest month in Fort Myers, averaging 19.1°C.
For December in Fort Myers, pack light layers you can adjust through the day, with typical highs of 23.2°C and lows of 14.9°C.
Relative humidity in December averages 82% — quite humid.
Average wind speed in December is 3 m/s. The windiest December on record averaged 3.6 m/s (1982).
The wettest December on record was 2019 with 148 mm. On average, December sees 47 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 Fort Myers 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.
