December is one of the warmer months of the year in Southport, with average highs near 29°C and lows around 19.8°C (mean 24.4°C). It is a relatively wet time of year, averaging 140 mm of rainfall and 70% relative humidity across the period.
December is one of the warmer months of the year in Southport. Across 45 years of records, the warmest December in Southport was 2023 — when the month averaged 26.6°C — while the coldest was 1983 at 21.6°C. Typical December days reach 29°C with nights near 19.8°C. The long-term trend is warming, about 0.2°C per decade.
December is a relatively wet time of year in Southport, averaging 140 mm of rainfall. The wettest December on record was 2010 with 435 mm, while the driest was 2013 at 32 mm.
Relative humidity in Southport during December averages 70%. The most humid December was 2010 at 83%, and the least humid was 2019 at 61%.
December receives about 6.8 kWh/m²/day of solar energy in Southport. The sunniest December was 2005 at 7.7 kWh/m²/day, and the cloudiest was 2010 at 4.9.
Average wind speed in Southport during December is 3.5 m/s. The windiest December was 1988 at 4.1 m/s, while the calmest was 2023 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.0°C | 23.9°C | 24.7°C | 24.6°C | 24.8°C | +0.8°C |
| Avg High | 28.7°C | 28.5°C | 29.3°C | 29.2°C | 29.2°C | +0.5°C |
| Avg Low | 19.3°C | 19.3°C | 20.0°C | 20.0°C | 20.3°C | +1°C |
| Avg Rain | 151 mm | 149 mm | 126 mm | 130 mm | 145 mm | -6 mm |
December temperatures in Southport have risen by about 0.5°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 12.8°C (2010) to a record high of 40.2°C (1990).
Rainfall in December is a relatively wet time of year, averaging 140 mm, with a wettest year of 435 mm.
A good time to visit Southport
December is a good time to visit Southport, with days averaging 29°C and nights around 19.8°C (mean 24.4°C, warmer than Southport's yearly average) and higher rainfall. October and November are marginally more temperate, but December still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 30.2°C | 25.1°C | 20.0°C | 35.6°C | 16.2°C | 77 mm | 66% | 3.5 m/s | — |
| 2024 | 28.6°C | 24.7°C | 20.9°C | 34.7°C | 16.9°C | 157 mm | 79% | 3.1 m/s | 6.7 |
| 2023 🔥 | 31.3°C | 26.6°C | 21.9°C | 36.0°C | 18.1°C | 134 mm | 70% | 2.9 m/s | 7 |
| 2022 | 28.3°C | 23.4°C | 18.6°C | 36.4°C | 15.7°C | 73 mm | 66% | 4 m/s | 6.7 |
| 2021 | 27.6°C | 23.6°C | 19.5°C | 32.0°C | 14.7°C | 147 mm | 76% | 3 m/s | 6.9 |
| 2020 | 29.1°C | 25.1°C | 21.2°C | 37.0°C | 18.6°C | 285 mm | 74% | 3.8 m/s | 6.3 |
| 2019 | 31.5°C | 26.1°C | 20.7°C | 38.8°C | 17.5°C | 75 mm | 61% | 3.4 m/s | 7.2 |
| 2018 | 29.9°C | 25.2°C | 20.5°C | 37.5°C | 17.5°C | 64 mm | 66% | 3.9 m/s | 6.8 |
| 2017 | 29.8°C | 25.1°C | 20.4°C | 34.2°C | 16.2°C | 95 mm | 71% | 3.2 m/s | 7.2 |
| 2016 | 30.9°C | 25.8°C | 20.7°C | 36.8°C | 18.2°C | 48 mm | 65% | 3.8 m/s | 6.9 |
| 2015 | 28.4°C | 24.0°C | 19.5°C | 35.2°C | 16.4°C | 94 mm | 68% | 3.7 m/s | 6.5 |
| 2014 | 29.4°C | 25.1°C | 20.8°C | 36.9°C | 16.2°C | 201 mm | 72% | 3.3 m/s | 6.3 |
| 2013 | 29.7°C | 24.3°C | 18.9°C | 39.1°C | 14.1°C | 32 mm | 65% | 3.2 m/s | 7.3 |
| 2012 | 30.1°C | 25.3°C | 20.6°C | 37.5°C | 16.7°C | 93 mm | 65% | 3.5 m/s | 7.1 |
| 2011 | 26.1°C | 22.1°C | 18.1°C | 30.4°C | 14.8°C | 165 mm | 73% | 3.8 m/s | 5.8 |
| 2010 🌧️ | 25.9°C | 22.7°C | 19.6°C | 30.2°C | 12.8°C | 435 mm | 83% | 3.5 m/s | 4.9 |
| 2009 | 30.2°C | 25.8°C | 21.4°C | 35.9°C | 17.4°C | 153 mm | 68% | 3.7 m/s | 6.9 |
| 2008 | 28.7°C | 24.1°C | 19.5°C | 35.3°C | 16.3°C | 113 mm | 74% | 3.3 m/s | 7 |
| 2007 | 27.4°C | 23.8°C | 20.1°C | 30.9°C | 18.5°C | 152 mm | 73% | 3.7 m/s | 5.9 |
| 2006 | 27.5°C | 22.9°C | 18.4°C | 33.2°C | 16.2°C | 74 mm | 66% | 3.6 m/s | 6.6 |
| 2005 | 31.8°C | 26.4°C | 20.9°C | 37.7°C | 15.2°C | 145 mm | 69% | 3.2 m/s | 7.7 |
| 2004 | 27.7°C | 23.6°C | 19.5°C | 33.5°C | 14.7°C | 208 mm | 76% | 3.6 m/s | 6.5 |
| 2003 | 29.2°C | 24.6°C | 20.1°C | 36.6°C | 16.0°C | 119 mm | 70% | 3.6 m/s | 6.5 |
| 2002 | 29.8°C | 24.6°C | 19.5°C | 37.7°C | 14.9°C | 124 mm | 64% | 3.6 m/s | 7.5 |
| 2001 | 31.5°C | 26.2°C | 20.9°C | 39.4°C | 17.9°C | 78 mm | 65% | 3.6 m/s | 7 |
| 2000 | 29.6°C | 24.8°C | 20.0°C | 36.8°C | 17.2°C | 96 mm | 68% | 3.5 m/s | 6.8 |
| 1999 | 26.0°C | 21.8°C | 17.6°C | 33.5°C | 15.4°C | 158 mm | 72% | 3.4 m/s | 6.9 |
| 1998 | 29.1°C | 24.5°C | 19.9°C | 37.1°C | 15.2°C | 123 mm | 71% | 3.1 m/s | 6.7 |
| 1997 | 30.5°C | 26.0°C | 21.4°C | 36.7°C | 18.2°C | 110 mm | 72% | 3.5 m/s | 6.8 |
| 1996 | 28.1°C | 23.6°C | 19.2°C | 36.9°C | 15.2°C | 159 mm | 72% | 3.3 m/s | 6.7 |
| 1995 | 27.8°C | 23.1°C | 18.4°C | 31.1°C | 14.9°C | 194 mm | 71% | 3.5 m/s | 7.1 |
| 1994 | 28.4°C | 23.7°C | 19.0°C | 37.8°C | 14.5°C | 117 mm | 68% | 3.8 m/s | 7.2 |
| 1993 | 28.2°C | 23.3°C | 18.4°C | 34.7°C | 14.2°C | 134 mm | 67% | 3.5 m/s | 7 |
| 1992 | 28.2°C | 23.7°C | 19.1°C | 34.8°C | 13.2°C | 104 mm | 69% | 3.7 m/s | 6.8 |
| 1991 | 27.2°C | 23.0°C | 18.9°C | 31.9°C | 14.4°C | 304 mm | 75% | 3.3 m/s | 7 |
| 1990 | 31.4°C | 26.4°C | 21.3°C | 40.2°C | 18.1°C | 89 mm | 67% | 3.6 m/s | 7 |
| 1989 | 27.9°C | 23.2°C | 18.5°C | 32.4°C | 15.8°C | 146 mm | 70% | 3.6 m/s | 6.9 |
| 1988 | 27.5°C | 23.9°C | 20.2°C | 32.9°C | 17.5°C | 279 mm | 77% | 4.1 m/s | 6.4 |
| 1987 | 28.8°C | 24.2°C | 19.6°C | 34.7°C | 13.7°C | 146 mm | 70% | 3.4 m/s | 7 |
| 1986 | 28.6°C | 23.7°C | 18.8°C | 35.2°C | 13.8°C | 86 mm | 69% | 3.4 m/s | 6.9 |
| 1985 | 30.6°C | 25.2°C | 19.8°C | 39.4°C | 16.0°C | 93 mm | 67% | 3.2 m/s | 6.9 |
| 1984 | 29.8°C | 24.6°C | 19.4°C | 35.7°C | 14.6°C | 99 mm | 68% | 3.3 m/s | 6.4 |
| 1983 ❄️ | 25.7°C | 21.6°C | 17.4°C | 33.4°C | 13.2°C | 212 mm | 76% | 3.1 m/s | — |
| 1982 | 29.5°C | 24.6°C | 19.7°C | 34.1°C | 17.0°C | 145 mm | 68% | 3.3 m/s | — |
| 1981 | 29.7°C | 25.2°C | 20.7°C | 38.0°C | 17.9°C | 154 mm | 74% | 3.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 29°C with lows near 19.8°C (mean 24.4°C), based on 45 years of NASA POWER data.
December averages 140 mm of rainfall in Southport, a relatively wet time of year. The wettest on record was 435 mm in 2010.
The hottest December reached 40.2°C in 1990. The coldest dipped to 12.8°C in 2010.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.5°C. Daytime highs moved from 29.1°C to 29.2°C and overnight lows from 19.4°C to 20.2°C over the same span.
December is one of the warmer months of the year in Southport and a relatively wet time of year, so plan for around 29°C daytime highs and 19.8°C at night.
Not quite — December is the 10th coolest month in Southport, averaging 24.4°C.
For December in Southport, pack light layers you can adjust through the day, with typical highs of 29°C and lows of 19.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 70% — moderately humid.
Average wind speed in December is 3.5 m/s. The windiest December on record averaged 4.1 m/s (1988).
The wettest December on record was 2010 with 435 mm. On average, December sees 140 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 Southport 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.
