December is one of the warmer months of the year in Deniliquin, with average highs near 31°C and lows around 14.7°C (mean 22.9°C). It is about average for rainfall, averaging 37 mm of rainfall and 44% relative humidity across the period.
December is one of the warmer months of the year in Deniliquin. Across 45 years of records, the warmest Decembers in Deniliquin were 2015 and 2018 — when the month averaged 25.3°C — while the coldest was 1986 at 20.1°C. Typical December days reach 31°C with nights near 14.7°C. The long-term trend is warming, about 0.2°C per decade.
December is about average for rainfall in Deniliquin, averaging 37 mm of rainfall. The wettest December on record was 1992 with 135 mm, while the driest was 1984 at 2 mm.
Relative humidity in Deniliquin during December averages 44%. The most humid December was 1992 at 68%, and the least humid was 2006 at 31%.
December receives about 7.9 kWh/m²/day of solar energy in Deniliquin. The sunniest December was 1994 at 8.7 kWh/m²/day, and the cloudiest was 1992 at 6.5.
Average wind speed in Deniliquin during December is 3.1 m/s. The windiest December was 1984 at 3.7 m/s, while the calmest was 1992 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.4°C | 22.6°C | 22.8°C | 23.6°C | 22.6°C | +0.2°C |
| Avg High | 30.5°C | 30.7°C | 31.1°C | 31.7°C | 30.7°C | +0.2°C |
| Avg Low | 14.3°C | 14.5°C | 14.5°C | 15.5°C | 14.5°C | +0.2°C |
| Avg Rain | 35 mm | 36 mm | 36 mm | 43 mm | 37 mm | +2 mm |
December temperatures in Deniliquin have stayed relatively stable across the record.
December has ranged from a record low of 6.1°C (2013) to a record high of 46.3°C (2019).
Rainfall in December is about average for rainfall, averaging 37 mm, with a wettest year of 135 mm.
One of the best times to visit Deniliquin
December is one of the best times to visit Deniliquin. Expect days averaging 31°C and nights around 14.7°C (mean 22.9°C) — warmer than Deniliquin's yearly average — with moderate rainfall (37 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 | 31.0°C | 22.6°C | 14.1°C | 42.0°C | 6.9°C | 27 mm | 44% | 3 m/s | — |
| 2024 | 32.6°C | 24.2°C | 15.9°C | 43.1°C | 9.9°C | 34 mm | 46% | 2.9 m/s | 8.5 |
| 2023 | 31.0°C | 23.6°C | 16.2°C | 40.0°C | 10.7°C | 81 mm | 52% | 2.7 m/s | 7.2 |
| 2022 | 28.0°C | 20.4°C | 12.7°C | 38.3°C | 6.7°C | 41 mm | 59% | 2.6 m/s | 7.8 |
| 2021 | 31.3°C | 22.8°C | 14.3°C | 41.9°C | 9.7°C | 22 mm | 47% | 2.7 m/s | 8.5 |
| 2020 | 30.3°C | 22.0°C | 13.7°C | 38.5°C | 8.2°C | 20 mm | 41% | 3.3 m/s | 8.1 |
| 2019 | 34.1°C | 25.1°C | 16.1°C | 46.3°C | 8.2°C | 12 mm | 34% | 3.2 m/s | 8.4 |
| 2018 | 33.5°C | 25.3°C | 17.2°C | 43.1°C | 11.0°C | 58 mm | 45% | 2.9 m/s | 7.6 |
| 2017 | 30.7°C | 23.0°C | 15.3°C | 38.4°C | 8.5°C | 104 mm | 53% | 2.8 m/s | 7.4 |
| 2016 | 31.3°C | 23.3°C | 15.3°C | 38.6°C | 8.4°C | 27 mm | 48% | 2.8 m/s | 7.5 |
| 2015 🔥 | 33.8°C | 25.3°C | 16.9°C | 42.5°C | 9.2°C | 21 mm | 33% | 2.9 m/s | 8.5 |
| 2014 | 32.2°C | 24.1°C | 16.0°C | 37.7°C | 11.4°C | 26 mm | 40% | 2.9 m/s | 8.2 |
| 2013 | 32.1°C | 23.2°C | 14.3°C | 42.1°C | 6.1°C | 56 mm | 43% | 3 m/s | 7.8 |
| 2012 | 32.0°C | 23.8°C | 15.6°C | 41.4°C | 10.4°C | 15 mm | 38% | 3.3 m/s | 8.1 |
| 2011 | 30.1°C | 22.4°C | 14.6°C | 37.0°C | 7.8°C | 40 mm | 48% | 3 m/s | 8.2 |
| 2010 | 27.4°C | 20.3°C | 13.3°C | 40.5°C | 6.4°C | 66 mm | 63% | 2.9 m/s | 7.5 |
| 2009 | 31.8°C | 23.0°C | 14.3°C | 40.7°C | 9.7°C | 22 mm | 42% | 2.9 m/s | 8.4 |
| 2008 | 28.2°C | 20.7°C | 13.2°C | 35.9°C | 8.0°C | 64 mm | 52% | 3.1 m/s | 7.7 |
| 2007 | 31.4°C | 23.4°C | 15.4°C | 40.6°C | 8.4°C | 66 mm | 47% | 2.9 m/s | 8 |
| 2006 | 32.0°C | 23.2°C | 14.3°C | 42.9°C | 7.4°C | 9 mm | 31% | 3.2 m/s | 8.3 |
| 2005 | 31.6°C | 23.1°C | 14.6°C | 45.8°C | 10.6°C | 20 mm | 41% | 3.3 m/s | 8.1 |
| 2004 | 29.2°C | 21.5°C | 13.8°C | 37.9°C | 7.5°C | 83 mm | 52% | 3 m/s | 7.7 |
| 2003 | 32.4°C | 24.2°C | 16.1°C | 41.8°C | 10.3°C | 64 mm | 49% | 2.7 m/s | 7.6 |
| 2002 | 32.6°C | 24.0°C | 15.5°C | 43.0°C | 7.5°C | 23 mm | 35% | 3.5 m/s | 7.8 |
| 2001 | 29.6°C | 21.4°C | 13.2°C | 38.5°C | 9.5°C | 5 mm | 38% | 3.3 m/s | 7.8 |
| 2000 | 32.5°C | 23.5°C | 14.4°C | 41.2°C | 8.7°C | 6 mm | 39% | 3 m/s | 8.4 |
| 1999 | 29.3°C | 21.6°C | 13.9°C | 37.7°C | 8.5°C | 56 mm | 48% | 3.3 m/s | 7.5 |
| 1998 | 32.3°C | 23.7°C | 15.0°C | 42.3°C | 9.0°C | 8 mm | 41% | 2.9 m/s | 8.6 |
| 1997 | 33.0°C | 24.5°C | 16.0°C | 38.9°C | 11.3°C | 12 mm | 36% | 3.1 m/s | 8.4 |
| 1996 | 30.4°C | 22.0°C | 13.7°C | 40.9°C | 9.0°C | 8 mm | 37% | 3.2 m/s | 8.1 |
| 1995 | 29.6°C | 20.9°C | 12.2°C | 37.7°C | 6.6°C | 16 mm | 41% | 3.2 m/s | 7.9 |
| 1994 | 34.4°C | 25.1°C | 15.8°C | 42.0°C | 8.9°C | 21 mm | 32% | 3 m/s | 8.7 |
| 1993 | 28.6°C | 20.9°C | 13.3°C | 40.7°C | 7.1°C | 56 mm | 52% | 3.3 m/s | 7.3 |
| 1992 🌧️ | 26.5°C | 20.4°C | 14.3°C | 33.6°C | 8.2°C | 135 mm | 68% | 2.5 m/s | 6.5 |
| 1991 | 29.4°C | 21.6°C | 13.8°C | 39.1°C | 8.6°C | 35 mm | 44% | 3 m/s | 7.6 |
| 1990 | 33.4°C | 25.0°C | 16.7°C | 41.1°C | 8.6°C | 11 mm | 34% | 3.2 m/s | 8 |
| 1989 | 32.2°C | 23.5°C | 14.7°C | 40.3°C | 8.7°C | 10 mm | 38% | 3.2 m/s | 7.9 |
| 1988 | 30.5°C | 22.8°C | 15.1°C | 39.3°C | 8.7°C | 83 mm | 55% | 2.8 m/s | 7.4 |
| 1987 | 31.6°C | 22.8°C | 14.0°C | 41.9°C | 7.0°C | 25 mm | 39% | 3.3 m/s | 8.4 |
| 1986 ❄️ | 27.9°C | 20.1°C | 12.3°C | 38.1°C | 8.0°C | 42 mm | 50% | 3.3 m/s | 7.7 |
| 1985 | 27.5°C | 20.5°C | 13.5°C | 35.3°C | 10.0°C | 78 mm | 55% | 3.1 m/s | 7.4 |
| 1984 | 30.4°C | 22.1°C | 13.8°C | 39.6°C | 8.3°C | 2 mm | 35% | 3.7 m/s | 8 |
| 1983 | 31.4°C | 23.2°C | 15.1°C | 39.5°C | 8.5°C | 55 mm | 44% | 3.1 m/s | — |
| 1982 | 32.2°C | 24.1°C | 16.0°C | 40.4°C | 10.3°C | 8 mm | 33% | 3.2 m/s | — |
| 1981 | 31.2°C | 22.8°C | 14.4°C | 40.6°C | 8.9°C | 12 mm | 38% | 3.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 31°C with lows near 14.7°C (mean 22.9°C), based on 45 years of NASA POWER data.
December averages 37 mm of rainfall in Deniliquin, about average for rainfall. The wettest on record was 135 mm in 1992.
The hottest December reached 46.3°C in 2019. The coldest dipped to 6.1°C in 2013.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.2°C. Daytime highs moved from 30.5°C to 30.8°C and overnight lows from 14.6°C to 14.6°C over the same span.
December is one of the warmer months of the year in Deniliquin and about average for rainfall, so plan for around 31°C daytime highs and 14.7°C at night.
Not quite — December is the 10th coolest month in Deniliquin, averaging 22.9°C.
For December in Deniliquin, pack light, breathable clothing and sun protection, with typical highs of 31°C and lows of 14.7°C.
Relative humidity in December averages 44% — relatively dry.
Average wind speed in December is 3.1 m/s. The windiest December on record averaged 3.7 m/s (1984).
The wettest December on record was 1992 with 135 mm. On average, December sees 37 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 Deniliquin 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.
