December is one of the warmer months of the year in Emerald, with average highs near 35.7°C and lows around 21.1°C (mean 28.4°C). It is a relatively wet time of year, averaging 83 mm of rainfall and 55% relative humidity across the period.
December is one of the warmer months of the year in Emerald. Across 45 years of records, the warmest December in Emerald was 2001 — when the month averaged 31.2°C — while the coldest was 2010 at 25°C. Typical December days reach 35.7°C with nights near 21.1°C. The long-term December temperature trend is broadly flat.
December is a relatively wet time of year in Emerald, averaging 83 mm of rainfall. The wettest December on record was 2010 with 357 mm, while the driest was 2019 at 1 mm.
Relative humidity in Emerald during December averages 55%. The most humid December was 2010 at 81%, and the least humid was 2019 at 39%.
December receives about 7.3 kWh/m²/day of solar energy in Emerald. The sunniest Decembers were 2013 and 2019 at 8.2 kWh/m²/day, and the cloudiest was 2010 at 5.6.
Average wind speed in Emerald during December is 3 m/s. The windiest Decembers were 1999 and 2018 at 3.8 m/s, while the calmest were 1985, 2008 and 2021 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 28.6°C | 28.1°C | 28.5°C | 28.2°C | 28.8°C | +0.2°C |
| Avg High | 36.2°C | 35.5°C | 35.7°C | 35.3°C | 35.9°C | -0.3°C |
| Avg Low | 21.0°C | 20.7°C | 21.2°C | 21.1°C | 21.6°C | +0.6°C |
| Avg Rain | 70 mm | 85 mm | 88 mm | 110 mm | 47 mm | -22 mm |
December temperatures in Emerald have fallen by about 0.3°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 13.4°C (2017) to a record high of 45.3°C (2013).
Rainfall in December is a relatively wet time of year, averaging 83 mm, with a wettest year of 357 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A quieter season to visit Emerald
If your dates are flexible, the more temperate months of September and April tend to be the most comfortable for visiting Emerald. That said, December — with days averaging 35.7°C and nights around 21.1°C (mean 28.4°C) and higher rainfall (83 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 36.7°C | 29.5°C | 22.4°C | 40.1°C | 17.0°C | 10 mm | 45% | 3.2 m/s | — |
| 2024 | 36.5°C | 29.5°C | 22.6°C | 42.2°C | 18.2°C | 97 mm | 57% | 2.9 m/s | 7 |
| 2023 | 36.5°C | 29.4°C | 22.2°C | 41.3°C | 19.2°C | 81 mm | 60% | 2.9 m/s | 7.1 |
| 2022 | 33.9°C | 26.4°C | 19.0°C | 40.9°C | 15.1°C | 42 mm | 57% | 3 m/s | 7.3 |
| 2021 | 34.5°C | 27.8°C | 21.1°C | 39.1°C | 18.3°C | 25 mm | 61% | 2.6 m/s | 7.5 |
| 2020 | 37.2°C | 29.9°C | 22.5°C | 42.4°C | 19.3°C | 28 mm | 50% | 3.4 m/s | 6.7 |
| 2019 | 39.5°C | 31.0°C | 22.5°C | 43.4°C | 19.4°C | 1 mm | 39% | 3.2 m/s | 8.2 |
| 2018 | 36.7°C | 29.0°C | 21.3°C | 43.3°C | 17.1°C | 38 mm | 52% | 3.8 m/s | 7.2 |
| 2017 | 35.8°C | 28.1°C | 20.5°C | 41.0°C | 13.4°C | 93 mm | 55% | 2.8 m/s | 7.9 |
| 2016 | 35.9°C | 28.8°C | 21.6°C | 44.0°C | 18.5°C | 112 mm | 57% | 2.9 m/s | 7 |
| 2015 | 33.8°C | 27.1°C | 20.5°C | 38.6°C | 17.5°C | 152 mm | 60% | 2.9 m/s | 7.2 |
| 2014 | 34.4°C | 27.9°C | 21.4°C | 37.6°C | 18.1°C | 178 mm | 63% | 2.7 m/s | 7.2 |
| 2013 | 37.1°C | 28.8°C | 20.4°C | 45.3°C | 17.4°C | 28 mm | 46% | 3.3 m/s | 8.2 |
| 2012 | 36.7°C | 29.2°C | 21.6°C | 42.1°C | 18.0°C | 33 mm | 47% | 3.2 m/s | 7.4 |
| 2011 | 33.3°C | 26.9°C | 20.4°C | 38.9°C | 17.8°C | 106 mm | 63% | 2.7 m/s | 6.4 |
| 2010 ❄️ 🌧️ | 29.4°C | 25.0°C | 20.6°C | 33.5°C | 14.6°C | 357 mm | 81% | 2.9 m/s | 5.6 |
| 2009 | 36.2°C | 29.0°C | 21.7°C | 41.2°C | 18.5°C | 69 mm | 54% | 3.1 m/s | 7.1 |
| 2008 | 35.9°C | 28.7°C | 21.4°C | 39.4°C | 15.5°C | 129 mm | 59% | 2.6 m/s | 7.5 |
| 2007 | 33.0°C | 26.7°C | 20.4°C | 38.4°C | 16.3°C | 114 mm | 65% | 2.9 m/s | 6.7 |
| 2006 | 34.3°C | 27.2°C | 20.1°C | 40.0°C | 17.0°C | 89 mm | 56% | 3.5 m/s | 6.7 |
| 2005 | 38.4°C | 30.3°C | 22.2°C | 41.8°C | 16.6°C | 51 mm | 48% | 2.9 m/s | 8.1 |
| 2004 | 34.8°C | 27.9°C | 20.9°C | 41.0°C | 14.9°C | 135 mm | 60% | 2.7 m/s | 7.1 |
| 2003 | 35.2°C | 28.3°C | 21.4°C | 40.7°C | 17.5°C | 109 mm | 59% | 3 m/s | 7.1 |
| 2002 | 37.3°C | 29.5°C | 21.6°C | 43.0°C | 17.5°C | 43 mm | 43% | 3.5 m/s | 8.1 |
| 2001 🔥 | 39.1°C | 31.2°C | 23.3°C | 44.5°C | 18.0°C | 46 mm | 45% | 3 m/s | 7.3 |
| 2000 | 32.8°C | 26.0°C | 19.3°C | 37.1°C | 14.9°C | 97 mm | 64% | 2.9 m/s | 6.7 |
| 1999 | 34.7°C | 27.1°C | 19.4°C | 40.9°C | 16.7°C | 26 mm | 51% | 3.8 m/s | 7.1 |
| 1998 | 34.9°C | 27.9°C | 20.8°C | 40.7°C | 15.0°C | 97 mm | 61% | 2.8 m/s | 7.4 |
| 1997 | 35.4°C | 29.2°C | 22.9°C | 42.0°C | 18.5°C | 102 mm | 62% | 2.7 m/s | 6.6 |
| 1996 | 35.2°C | 28.0°C | 20.8°C | 44.0°C | 15.8°C | 107 mm | 59% | 3 m/s | 7.1 |
| 1995 | 36.8°C | 28.7°C | 20.6°C | 41.5°C | 14.1°C | 60 mm | 50% | 3.2 m/s | 7.4 |
| 1994 | 36.5°C | 28.7°C | 20.8°C | 41.9°C | 16.6°C | 31 mm | 47% | 3.4 m/s | 7.9 |
| 1993 | 35.6°C | 27.6°C | 19.6°C | 40.1°C | 15.3°C | 28 mm | 51% | 3.3 m/s | 7.5 |
| 1992 | 34.8°C | 27.3°C | 19.8°C | 39.4°C | 15.8°C | 86 mm | 54% | 3.2 m/s | 7.2 |
| 1991 | 35.2°C | 27.8°C | 20.3°C | 39.6°C | 15.4°C | 109 mm | 57% | 2.7 m/s | 7.7 |
| 1990 | 35.7°C | 28.9°C | 22.1°C | 43.4°C | 19.3°C | 205 mm | 56% | 3.7 m/s | 6.9 |
| 1989 | 35.6°C | 28.0°C | 20.4°C | 42.0°C | 15.7°C | 27 mm | 50% | 2.8 m/s | 7.7 |
| 1988 | 34.3°C | 27.5°C | 20.8°C | 37.4°C | 16.9°C | 106 mm | 61% | 3.7 m/s | 6.9 |
| 1987 | 36.1°C | 28.5°C | 20.8°C | 40.5°C | 14.7°C | 65 mm | 50% | 3.2 m/s | 7.5 |
| 1986 | 37.7°C | 29.6°C | 21.5°C | 43.7°C | 16.4°C | 24 mm | 47% | 2.9 m/s | 7.5 |
| 1985 | 37.2°C | 29.3°C | 21.4°C | 42.3°C | 16.0°C | 83 mm | 54% | 2.6 m/s | 7.8 |
| 1984 | 36.2°C | 29.1°C | 22.0°C | 42.3°C | 17.0°C | 121 mm | 58% | 2.7 m/s | 7.3 |
| 1983 | 34.2°C | 26.4°C | 18.7°C | 37.9°C | 13.5°C | 43 mm | 55% | 3.2 m/s | — |
| 1982 | 37.1°C | 29.1°C | 21.0°C | 40.2°C | 16.7°C | 69 mm | 50% | 3 m/s | — |
| 1981 | 37.8°C | 30.1°C | 22.5°C | 42.8°C | 18.4°C | 88 mm | 53% | 2.7 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 35.7°C with lows near 21.1°C (mean 28.4°C), based on 45 years of NASA POWER data.
December averages 83 mm of rainfall in Emerald, a relatively wet time of year. The wettest on record was 357 mm in 2010.
The hottest December reached 45.3°C in 2013. The coldest dipped to 13.4°C in 2017.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have fallen by about 0.3°C — but days and nights have moved in opposite directions. Overnight lows rose from 21.1°C to 21.5°C while daytime highs eased from 36.5°C to 35.6°C, narrowing the gap between day and night.
December is one of the warmer months of the year in Emerald and a relatively wet time of year, so plan for around 35.7°C daytime highs and 21.1°C at night.
Not quite — December is the 11th coolest month in Emerald, averaging 28.4°C.
For December in Emerald, pack light, breathable clothing and sun protection, with typical highs of 35.7°C and lows of 21.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 55% — relatively dry.
Average wind speed in December is 3 m/s. The windiest December on record averaged 3.8 m/s (1999).
The wettest December on record was 2010 with 357 mm. On average, December sees 83 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 Emerald 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.
