December is one of the cooler months of the year in Delray Beach, with average highs near 24°C and lows around 19.6°C (mean 21.8°C). It is one of the drier months, averaging 59 mm of rainfall and 78% relative humidity across the period.
December is one of the cooler months of the year in Delray Beach. Across 45 years of records, the warmest December in Delray Beach was 2015 — when the month averaged 24.8°C — while the coldest was 2010 at 17.2°C. Typical December days reach 24°C with nights near 19.6°C. The long-term trend is warming, about 0.4°C per decade.
December is one of the drier months in Delray Beach, averaging 59 mm of rainfall. The wettest December on record was 1994 with 174 mm, while the driest was 1984 at 12 mm.
Relative humidity in Delray Beach during December averages 78%. The most humid December was 2015 at 85%, and the least humid was 2010 at 71%.
December receives about 3.2 kWh/m²/day of solar energy in Delray Beach. The sunniest December was 2010 at 3.8 kWh/m²/day, and the cloudiest were 1986 and 2023 at 2.7.
Average wind speed in Delray Beach during December is 3.9 m/s. The windiest December was 2023 at 4.7 m/s, while the calmest was 2021 at 2.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.2°C | 21.4°C | 21.7°C | 22.4°C | 22.3°C | +1.1°C |
| Avg High | 23.5°C | 23.6°C | 24.0°C | 24.6°C | 24.6°C | +1.1°C |
| Avg Low | 18.9°C | 19.3°C | 19.5°C | 20.1°C | 20.1°C | +1.2°C |
| Avg Rain | 59 mm | 64 mm | 62 mm | 52 mm | 56 mm | -3 mm |
December temperatures in Delray Beach have risen by about 1.5°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 0.9°C (1989) to a record high of 29°C (2018).
Rainfall in December is one of the drier months, averaging 59 mm, with a wettest year of 174 mm.
One of the best times to visit Delray Beach
December is one of the best times to visit Delray Beach. Expect days averaging 24°C and nights around 19.6°C (mean 21.8°C) — cooler than Delray Beach's yearly average — with moderate rainfall (59 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 | 25.2°C | 22.9°C | 20.7°C | 27.9°C | 11.6°C | 42 mm | 79% | 3.5 m/s | — |
| 2024 | 24.3°C | 22.1°C | 20.0°C | 27.1°C | 15.3°C | 47 mm | 80% | 4.1 m/s | 3.4 |
| 2023 | 24.0°C | 22.2°C | 20.3°C | 28.6°C | 14.9°C | 112 mm | 79% | 4.7 m/s | 2.7 |
| 2022 | 24.6°C | 22.5°C | 20.4°C | 27.2°C | 10.3°C | 55 mm | 80% | 3.7 m/s | 3.2 |
| 2021 | 25.9°C | 23.6°C | 21.3°C | 27.5°C | 15.5°C | 29 mm | 79% | 2.8 m/s | 3.6 |
| 2020 | 23.3°C | 20.6°C | 18.0°C | 26.7°C | 11.4°C | 49 mm | 79% | 4 m/s | 3.6 |
| 2019 | 24.9°C | 22.7°C | 20.4°C | 27.4°C | 12.8°C | 121 mm | 80% | 4.5 m/s | 3.1 |
| 2018 | 24.7°C | 22.4°C | 20.0°C | 29.0°C | 12.8°C | 37 mm | 77% | 4.4 m/s | 3.4 |
| 2017 | 24.1°C | 21.6°C | 19.2°C | 27.2°C | 11.3°C | 22 mm | 78% | 3.1 m/s | 3.6 |
| 2016 | 25.8°C | 24.0°C | 22.2°C | 27.8°C | 16.7°C | 57 mm | 83% | 3.9 m/s | 3.3 |
| 2015 🔥 | 26.3°C | 24.8°C | 23.3°C | 27.7°C | 20.6°C | 127 mm | 85% | 4 m/s | 2.8 |
| 2014 | 24.6°C | 22.2°C | 19.8°C | 27.6°C | 13.3°C | 30 mm | 75% | 3.3 m/s | 3.4 |
| 2013 | 25.8°C | 23.9°C | 22.1°C | 27.8°C | 19.1°C | 31 mm | 79% | 4 m/s | 3.1 |
| 2012 | 24.7°C | 22.3°C | 19.9°C | 27.4°C | 12.1°C | 37 mm | 77% | 3.9 m/s | 3.2 |
| 2011 | 24.6°C | 22.5°C | 20.4°C | 26.6°C | 15.2°C | 33 mm | 76% | 3.9 m/s | 3.3 |
| 2010 ❄️ | 20.5°C | 17.2°C | 14.0°C | 26.6°C | 5.5°C | 22 mm | 71% | 4.1 m/s | 3.8 |
| 2009 | 24.6°C | 22.4°C | 20.2°C | 28.6°C | 12.5°C | 141 mm | 81% | 4.1 m/s | 2.9 |
| 2008 | 23.7°C | 21.5°C | 19.3°C | 25.9°C | 14.1°C | 24 mm | 77% | 3.7 m/s | 3.3 |
| 2007 | 25.3°C | 23.1°C | 20.9°C | 27.3°C | 14.2°C | 35 mm | 80% | 3.4 m/s | 3.4 |
| 2006 | 25.1°C | 23.3°C | 21.5°C | 27.1°C | 14.1°C | 108 mm | 78% | 4.4 m/s | 2.8 |
| 2005 | 23.3°C | 20.8°C | 18.2°C | 26.8°C | 12.0°C | 30 mm | 80% | 3.7 m/s | 3.4 |
| 2004 | 23.5°C | 21.2°C | 18.9°C | 28.0°C | 12.1°C | 37 mm | 74% | 4.2 m/s | 3.2 |
| 2003 | 22.7°C | 20.2°C | 17.6°C | 26.4°C | 11.0°C | 50 mm | 75% | 4.3 m/s | 3.2 |
| 2002 | 24.0°C | 21.4°C | 18.8°C | 27.5°C | 12.6°C | 90 mm | 78% | 4 m/s | 3 |
| 2001 | 24.8°C | 22.6°C | 20.5°C | 26.5°C | 12.1°C | 58 mm | 81% | 3.8 m/s | 3.2 |
| 2000 | 23.1°C | 20.9°C | 18.7°C | 26.9°C | 8.5°C | 45 mm | 77% | 4.4 m/s | 3.2 |
| 1999 | 23.4°C | 21.2°C | 19.0°C | 26.0°C | 12.2°C | 34 mm | 80% | 3.6 m/s | 3.1 |
| 1998 | 24.8°C | 22.9°C | 20.9°C | 26.7°C | 14.2°C | 59 mm | 80% | 3.7 m/s | 3.3 |
| 1997 | 23.1°C | 20.6°C | 18.1°C | 27.5°C | 11.6°C | 123 mm | 82% | 4.2 m/s | 3 |
| 1996 | 23.9°C | 21.6°C | 19.2°C | 26.6°C | 10.8°C | 44 mm | 77% | 3.7 m/s | 3.3 |
| 1995 | 22.0°C | 19.9°C | 17.7°C | 25.6°C | 7.7°C | 36 mm | 80% | 3.8 m/s | 3.1 |
| 1994 🌧️ | 23.9°C | 22.0°C | 20.1°C | 26.7°C | 13.0°C | 174 mm | 83% | 3.8 m/s | 3.1 |
| 1993 | 22.9°C | 20.2°C | 17.6°C | 26.1°C | 11.9°C | 26 mm | 79% | 3.8 m/s | 3.3 |
| 1992 | 23.7°C | 21.7°C | 19.8°C | 25.7°C | 12.2°C | 58 mm | 78% | 3.5 m/s | 3.2 |
| 1991 | 23.7°C | 21.9°C | 20.2°C | 26.7°C | 16.1°C | 45 mm | 80% | 3.6 m/s | 3.3 |
| 1990 | 24.5°C | 22.5°C | 20.6°C | 25.9°C | 14.2°C | 45 mm | 77% | 3.8 m/s | 3.2 |
| 1989 | 22.4°C | 19.3°C | 16.2°C | 26.9°C | 0.9°C | 42 mm | 75% | 3.8 m/s | 2.9 |
| 1988 | 23.9°C | 21.4°C | 19.0°C | 25.9°C | 11.2°C | 29 mm | 74% | 3.6 m/s | 3.3 |
| 1987 | 23.3°C | 21.0°C | 18.6°C | 26.2°C | 12.7°C | 43 mm | 77% | 4 m/s | 3 |
| 1986 | 24.9°C | 23.0°C | 21.2°C | 27.2°C | 17.0°C | 146 mm | 81% | 3.8 m/s | 2.7 |
| 1985 | 22.4°C | 19.9°C | 17.4°C | 26.4°C | 6.5°C | 71 mm | 77% | 3.7 m/s | 2.9 |
| 1984 | 24.1°C | 22.2°C | 20.3°C | 26.5°C | 12.2°C | 12 mm | 76% | 3.8 m/s | 3.1 |
| 1983 | 23.9°C | 21.6°C | 19.4°C | 26.9°C | 5.7°C | 134 mm | 84% | 4 m/s | — |
| 1982 | 23.7°C | 21.9°C | 20.1°C | 26.4°C | 12.5°C | 36 mm | 79% | 4.6 m/s | — |
| 1981 | 22.9°C | 20.4°C | 17.8°C | 27.1°C | 8.8°C | 21 mm | 75% | 4.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 24°C with lows near 19.6°C (mean 21.8°C), based on 45 years of NASA POWER data.
December averages 59 mm of rainfall in Delray Beach, one of the drier months. The wettest on record was 174 mm in 1994.
The hottest December reached 29°C in 2018. The coldest dipped to 0.9°C in 1989.
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 23.4°C to 24.8°C and overnight lows from 19°C to 20.5°C over the same span.
December is one of the cooler months of the year in Delray Beach and one of the drier months, so plan for around 24°C daytime highs and 19.6°C at night.
Not quite — December is the 3rd coolest month in Delray Beach, averaging 21.8°C.
For December in Delray Beach, pack light layers you can adjust through the day, with typical highs of 24°C and lows of 19.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 78% — quite humid.
Average wind speed in December is 3.9 m/s. The windiest December on record averaged 4.7 m/s (2023).
The wettest December on record was 1994 with 174 mm. On average, December sees 59 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 Delray Beach 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.
