January is one of the warmer months of the year in Port Denison, with average highs near 31.7°C and lows around 20.3°C (mean 26°C). It is one of the drier months, averaging 10 mm of rainfall and 54% relative humidity across the period.
January is one of the warmer months of the year in Port Denison. Across 45 years of records, the warmest Januarys in Port Denison were 2012 and 2025 — when the month averaged 27.8°C — while the coldest was 1990 at 23.9°C. Typical January days reach 31.7°C with nights near 20.3°C. The long-term trend is warming, about 0.3°C per decade.
January is one of the drier months in Port Denison, averaging 10 mm of rainfall. The wettest January on record was 1990 with 85 mm, while the driest were 2003, 2010 and 2021, among others at 0 mm.
Relative humidity in Port Denison during January averages 54%. The most humid January was 2016 at 65%, and the least humid was 1981 at 44%.
January receives about 8.2 kWh/m²/day of solar energy in Port Denison. The sunniest January was 2022 at 8.7 kWh/m²/day, and the cloudiest was 2016 at 6.7.
Average wind speed in Port Denison during January is 5.2 m/s. The windiest Januarys were 2005 and 2018 at 5.8 m/s, while the calmest was 2016 at 4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.7°C | 25.8°C | 25.5°C | 26.4°C | 26.9°C | +1.2°C |
| Avg High | 31.6°C | 31.7°C | 31.1°C | 32.1°C | 32.6°C | +1°C |
| Avg Low | 19.9°C | 20.0°C | 19.8°C | 20.8°C | 21.2°C | +1.3°C |
| Avg Rain | 6 mm | 11 mm | 9 mm | 20 mm | 2 mm | -5 mm |
January temperatures in Port Denison have risen by about 1.4°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 13.7°C (1988) to a record high of 42°C (2014).
Rainfall in January is one of the drier months, averaging 10 mm, with a wettest year of 85 mm.
A good time to visit Port Denison
January is a good time to visit Port Denison, with days averaging 31.7°C and nights around 20.3°C (mean 26°C, warmer than Port Denison's yearly average) and low rainfall. November and April are marginally more temperate, but January still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 33.2°C | 27.8°C | 22.3°C | 39.4°C | 17.7°C | 1 mm | 55% | 4.6 m/s | 8.1 |
| 2024 | 31.6°C | 26.1°C | 20.5°C | 39.7°C | 18.3°C | 1 mm | 58% | 5.2 m/s | 8.5 |
| 2023 | 32.6°C | 26.6°C | 20.6°C | 39.0°C | 16.9°C | 7 mm | 53% | 5.3 m/s | 8.6 |
| 2022 | 33.9°C | 27.7°C | 21.6°C | 39.8°C | 18.2°C | 1 mm | 50% | 5.5 m/s | 8.7 |
| 2021 | 33.0°C | 27.7°C | 22.4°C | 38.2°C | 17.3°C | 0 mm | 49% | 5.4 m/s | 8.2 |
| 2020 | 31.2°C | 25.5°C | 19.8°C | 38.1°C | 15.6°C | 1 mm | 55% | 5.4 m/s | 8.6 |
| 2019 | 30.7°C | 24.8°C | 18.8°C | 39.3°C | 15.6°C | 0 mm | 56% | 5.5 m/s | 8.4 |
| 2018 | 31.4°C | 25.7°C | 20.1°C | 36.4°C | 15.8°C | 36 mm | 58% | 5.8 m/s | 8.1 |
| 2017 | 32.0°C | 25.9°C | 19.7°C | 39.5°C | 15.9°C | 38 mm | 52% | 5.1 m/s | 8.2 |
| 2016 | 29.5°C | 25.0°C | 20.6°C | 39.0°C | 17.1°C | 80 mm | 65% | 4 m/s | 6.7 |
| 2015 | 33.5°C | 27.2°C | 21.0°C | 39.7°C | 17.3°C | 4 mm | 48% | 5.1 m/s | 8.3 |
| 2014 | 32.5°C | 26.8°C | 21.1°C | 42.0°C | 16.7°C | 3 mm | 53% | 5.5 m/s | 8.4 |
| 2013 | 32.3°C | 26.6°C | 21.0°C | 38.8°C | 17.1°C | 8 mm | 53% | 5.3 m/s | 8 |
| 2012 🔥 | 32.9°C | 27.8°C | 22.8°C | 39.6°C | 16.3°C | 10 mm | 55% | 4.7 m/s | 7.8 |
| 2011 | 32.9°C | 27.6°C | 22.3°C | 39.2°C | 18.1°C | 21 mm | 55% | 4.8 m/s | 7.5 |
| 2010 | 32.8°C | 26.7°C | 20.6°C | 41.3°C | 16.2°C | 0 mm | 53% | 5.2 m/s | 8.4 |
| 2009 | 33.0°C | 26.7°C | 20.4°C | 40.5°C | 17.7°C | 4 mm | 57% | 5.6 m/s | 8.3 |
| 2008 | 33.0°C | 27.0°C | 21.0°C | 40.9°C | 16.6°C | 1 mm | 55% | 5.3 m/s | 7.9 |
| 2007 | 29.6°C | 24.0°C | 18.4°C | 38.0°C | 15.3°C | 11 mm | 59% | 5.1 m/s | 8.2 |
| 2006 | 30.1°C | 24.8°C | 19.5°C | 35.9°C | 14.8°C | 32 mm | 61% | 5.6 m/s | 7.2 |
| 2005 | 31.9°C | 25.3°C | 18.7°C | 38.7°C | 16.3°C | 0 mm | 52% | 5.8 m/s | 8.6 |
| 2004 | 31.3°C | 25.7°C | 20.1°C | 38.7°C | 17.0°C | 1 mm | 58% | 5 m/s | 8.2 |
| 2003 | 30.8°C | 25.0°C | 19.3°C | 36.9°C | 16.8°C | 0 mm | 54% | 5.1 m/s | 8.5 |
| 2002 | 30.4°C | 25.1°C | 19.7°C | 35.9°C | 14.9°C | 10 mm | 55% | 4.7 m/s | 8.1 |
| 2001 | 30.0°C | 24.6°C | 19.2°C | 36.5°C | 14.9°C | 3 mm | 62% | 5.3 m/s | 7.7 |
| 2000 | 31.3°C | 26.4°C | 21.5°C | 36.7°C | 17.8°C | 23 mm | 56% | 4.7 m/s | 8.1 |
| 1999 | 30.3°C | 25.0°C | 19.7°C | 37.8°C | 14.9°C | 0 mm | 62% | 5.3 m/s | 8.1 |
| 1998 | 32.3°C | 26.1°C | 19.9°C | 38.8°C | 15.7°C | 0 mm | 53% | 5.1 m/s | 8.5 |
| 1997 | 33.6°C | 27.6°C | 21.7°C | 39.6°C | 16.0°C | 2 mm | 47% | 5.2 m/s | 8.5 |
| 1996 | 31.5°C | 25.6°C | 19.7°C | 39.1°C | 16.1°C | 0 mm | 52% | 5.5 m/s | 8.3 |
| 1995 | 32.1°C | 26.4°C | 20.7°C | 36.6°C | 17.2°C | 11 mm | 56% | 5.5 m/s | 8.4 |
| 1994 | 31.3°C | 24.9°C | 18.6°C | 38.3°C | 15.2°C | 0 mm | 54% | 5.4 m/s | 8.6 |
| 1993 | 32.2°C | 25.8°C | 19.5°C | 37.9°C | 15.6°C | 0 mm | 55% | 5.1 m/s | 8.4 |
| 1992 | 32.1°C | 26.7°C | 21.3°C | 37.1°C | 15.9°C | 4 mm | 50% | 4.5 m/s | 7.8 |
| 1991 | 32.0°C | 26.0°C | 20.0°C | 41.2°C | 15.3°C | 5 mm | 53% | 5.2 m/s | 8.4 |
| 1990 ❄️ 🌧️ | 29.2°C | 23.9°C | 18.6°C | 35.1°C | 13.8°C | 85 mm | 60% | 5.5 m/s | 7.4 |
| 1989 | 31.6°C | 26.3°C | 21.1°C | 38.9°C | 16.2°C | 5 mm | 50% | 5 m/s | 7.8 |
| 1988 | 30.6°C | 24.8°C | 18.9°C | 38.7°C | 13.7°C | 1 mm | 54% | 5.3 m/s | 8.3 |
| 1987 | 29.7°C | 24.2°C | 18.7°C | 36.0°C | 16.2°C | 0 mm | 58% | 5.3 m/s | 8.2 |
| 1986 | 32.9°C | 26.9°C | 20.9°C | 39.3°C | 15.9°C | 5 mm | 50% | 5 m/s | 8.4 |
| 1985 | 30.2°C | 24.3°C | 18.4°C | 36.9°C | 15.8°C | 4 mm | 58% | 5.3 m/s | 8.5 |
| 1984 | 32.6°C | 26.5°C | 20.3°C | 39.6°C | 15.6°C | 1 mm | 50% | 5.3 m/s | 8.3 |
| 1983 | 32.3°C | 26.3°C | 20.4°C | 38.9°C | 15.9°C | 2 mm | 51% | 5.1 m/s | — |
| 1982 | 30.5°C | 24.7°C | 19.0°C | 38.8°C | 15.5°C | 36 mm | 57% | 5.6 m/s | — |
| 1981 | 33.6°C | 27.4°C | 21.3°C | 39.9°C | 16.8°C | 4 mm | 44% | 5.4 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 31.7°C with lows near 20.3°C (mean 26°C), based on 45 years of NASA POWER data.
January averages 10 mm of rainfall in Port Denison, one of the drier months. The wettest on record was 85 mm in 1990.
The hottest January reached 42°C in 2014. The coldest dipped to 13.7°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 1.4°C. Daytime highs moved from 31.8°C to 32.9°C and overnight lows from 19.9°C to 21.5°C over the same span.
January is one of the warmer months of the year in Port Denison and one of the drier months, so plan for around 31.7°C daytime highs and 20.3°C at night.
Not quite — January is the 11th coolest month in Port Denison, averaging 26°C.
For January in Port Denison, pack light, breathable clothing and sun protection, with typical highs of 31.7°C and lows of 20.3°C.
Relative humidity in January averages 54% — relatively dry.
Average wind speed in January is 5.2 m/s. The windiest January on record averaged 5.8 m/s (2005).
The wettest January on record was 1990 with 85 mm. On average, January sees 10 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 Port Denison behaves each January, 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 January specifically, along with year-by-year records and how the month has changed over the decades.
