January is close to Adelaide River's year-round average, with average highs near 30.9°C and lows around 24.8°C (mean 27.9°C). It is a relatively wet time of year, averaging 371 mm of rainfall and 86% relative humidity across the period.
January is close to Adelaide River's year-round average. Across 45 years of records, the warmest January in Adelaide River was 2020 — when the month averaged 29.8°C — while the coldest were 1997 and 2011 at 26.8°C. Typical January days reach 30.9°C with nights near 24.8°C. The long-term trend is warming, about 0.2°C per decade.
January is a relatively wet time of year in Adelaide River, averaging 371 mm of rainfall. The wettest January on record was 1997 with 685 mm, while the driest was 2016 at 90 mm.
Relative humidity in Adelaide River during January averages 86%. The most humid January was 2010 at 92%, and the least humid was 1983 at 76%.
January receives about 5.8 kWh/m²/day of solar energy in Adelaide River. The sunniest January was 1988 at 7.2 kWh/m²/day, and the cloudiest was 2024 at 4.5.
Average wind speed in Adelaide River during January is 2.1 m/s. The windiest January was 2024 at 3.2 m/s, while the calmest was 2025 at 1.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.7°C | 27.6°C | 27.6°C | 28.0°C | 28.3°C | +0.6°C |
| Avg High | 31.0°C | 30.6°C | 30.5°C | 31.0°C | 31.3°C | +0.3°C |
| Avg Low | 24.4°C | 24.6°C | 24.7°C | 25.0°C | 25.3°C | +0.9°C |
| Avg Rain | 367 mm | 437 mm | 340 mm | 387 mm | 292 mm | -76 mm |
January temperatures in Adelaide River have stayed relatively stable across the record.
January has ranged from a record low of 21°C (2005) to a record high of 39.2°C (2019).
Rainfall in January is a relatively wet time of year, averaging 371 mm, with a wettest year of 685 mm.
A quieter season to visit Adelaide River
If your dates are flexible, the more temperate months of June and July tend to be the most comfortable for visiting Adelaide River. That said, January — with days averaging 30.9°C and nights around 24.8°C (mean 27.9°C) and higher rainfall (371 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 31.5°C | 28.3°C | 25.2°C | 34.7°C | 23.4°C | 251 mm | 86% | 1.2 m/s | 6.2 |
| 2024 | 31.1°C | 28.6°C | 26.0°C | 38.3°C | 24.4°C | 481 mm | 86% | 3.2 m/s | 4.5 |
| 2023 | 30.6°C | 27.6°C | 24.7°C | 32.5°C | 23.6°C | 261 mm | 88% | 2.5 m/s | 5.2 |
| 2022 | 30.6°C | 27.8°C | 25.0°C | 33.7°C | 23.9°C | 278 mm | 88% | 2.1 m/s | 5.8 |
| 2021 | 30.3°C | 27.7°C | 25.0°C | 32.7°C | 23.4°C | 326 mm | 89% | 1.8 m/s | 5.9 |
| 2020 🔥 | 33.7°C | 29.8°C | 25.9°C | 37.0°C | 23.9°C | 153 mm | 78% | 2.4 m/s | 6 |
| 2019 | 33.1°C | 29.4°C | 25.6°C | 39.2°C | 24.4°C | 175 mm | 79% | 2.3 m/s | 6.2 |
| 2018 | 31.7°C | 28.5°C | 25.3°C | 37.2°C | 24.2°C | 386 mm | 83% | 2.3 m/s | 5.1 |
| 2017 | 31.8°C | 28.4°C | 25.0°C | 34.2°C | 23.9°C | 171 mm | 83% | 2.5 m/s | 5.5 |
| 2016 | 33.6°C | 29.4°C | 25.3°C | 35.6°C | 24.2°C | 90 mm | 79% | 1.7 m/s | 6.9 |
| 2015 | 29.3°C | 27.0°C | 24.8°C | 30.9°C | 23.2°C | 521 mm | 91% | 2.7 m/s | 5 |
| 2014 | 30.2°C | 27.5°C | 24.7°C | 35.4°C | 22.8°C | 662 mm | 89% | 2.3 m/s | 5.6 |
| 2013 | 30.8°C | 28.1°C | 25.3°C | 33.4°C | 24.0°C | 259 mm | 87% | 2.1 m/s | 6.3 |
| 2012 | 30.8°C | 27.8°C | 24.8°C | 33.9°C | 23.0°C | 482 mm | 87% | 2.1 m/s | 5.9 |
| 2011 | 29.3°C | 26.8°C | 24.4°C | 32.7°C | 23.1°C | 556 mm | 91% | 2.2 m/s | 5 |
| 2010 | 29.2°C | 27.0°C | 24.9°C | 31.5°C | 23.7°C | 569 mm | 92% | 2.4 m/s | 5.3 |
| 2009 | 29.7°C | 27.3°C | 24.9°C | 31.3°C | 24.1°C | 344 mm | 91% | 2.1 m/s | 5.4 |
| 2008 | 29.9°C | 27.4°C | 24.9°C | 32.5°C | 23.4°C | 375 mm | 90% | 2.3 m/s | 6 |
| 2007 | 31.1°C | 28.1°C | 25.2°C | 33.1°C | 24.2°C | 303 mm | 88% | 1.9 m/s | 5.4 |
| 2006 | 29.7°C | 27.3°C | 24.8°C | 32.6°C | 23.4°C | 499 mm | 90% | 2.8 m/s | 4.8 |
| 2005 | 30.8°C | 27.8°C | 24.7°C | 34.2°C | 21.0°C | 355 mm | 87% | 2.2 m/s | 6.2 |
| 2004 | 30.2°C | 27.5°C | 24.8°C | 32.3°C | 23.4°C | 354 mm | 89% | 2 m/s | 5.8 |
| 2003 | 31.3°C | 27.8°C | 24.4°C | 34.0°C | 21.8°C | 319 mm | 84% | 2.5 m/s | 5.2 |
| 2002 | 31.4°C | 28.2°C | 24.9°C | 32.8°C | 23.9°C | 145 mm | 86% | 1.8 m/s | 6.3 |
| 2001 | 30.7°C | 27.5°C | 24.4°C | 33.5°C | 23.0°C | 353 mm | 86% | 1.4 m/s | 6 |
| 2000 | 30.5°C | 27.4°C | 24.2°C | 33.2°C | 23.1°C | 352 mm | 87% | 1.5 m/s | 6.2 |
| 1999 | 30.7°C | 27.7°C | 24.7°C | 33.7°C | 23.5°C | 365 mm | 88% | 1.7 m/s | 5.9 |
| 1998 | 30.2°C | 27.7°C | 25.1°C | 33.0°C | 23.6°C | 620 mm | 90% | 2.7 m/s | 5.6 |
| 1997 ❄️ 🌧️ | 29.4°C | 26.8°C | 24.2°C | 32.2°C | 22.6°C | 685 mm | 90% | 2.1 m/s | 5.6 |
| 1996 | 31.1°C | 27.7°C | 24.4°C | 32.9°C | 23.6°C | 283 mm | 87% | 1.8 m/s | 6 |
| 1995 | 30.2°C | 27.5°C | 24.7°C | 32.2°C | 23.4°C | 644 mm | 88% | 2.2 m/s | 5.5 |
| 1994 | 30.7°C | 27.6°C | 24.6°C | 32.5°C | 23.3°C | 220 mm | 88% | 1.5 m/s | 6.9 |
| 1993 | 30.9°C | 27.7°C | 24.6°C | 34.5°C | 23.6°C | 483 mm | 86% | 2.5 m/s | 5.6 |
| 1992 | 31.8°C | 28.1°C | 24.3°C | 34.1°C | 22.8°C | 242 mm | 82% | 1.6 m/s | 6.9 |
| 1991 | 29.5°C | 27.2°C | 24.9°C | 31.0°C | 23.8°C | 535 mm | 91% | 2.4 m/s | 5 |
| 1990 | 31.8°C | 28.2°C | 24.6°C | 37.5°C | 23.6°C | 296 mm | 83% | 1.7 m/s | 6.2 |
| 1989 | 30.7°C | 27.4°C | 24.1°C | 32.5°C | 22.0°C | 288 mm | 87% | 1.7 m/s | 6.6 |
| 1988 | 30.9°C | 27.8°C | 24.7°C | 33.1°C | 23.9°C | 206 mm | 87% | 1.5 m/s | 7.2 |
| 1987 | 31.6°C | 28.2°C | 24.8°C | 36.4°C | 22.5°C | 424 mm | 83% | 2.1 m/s | 5.6 |
| 1986 | 30.3°C | 27.3°C | 24.3°C | 33.7°C | 22.3°C | 548 mm | 87% | 2.1 m/s | 6.2 |
| 1985 | 31.9°C | 28.0°C | 24.1°C | 34.3°C | 22.9°C | 227 mm | 81% | 1.7 m/s | 7 |
| 1984 | 30.3°C | 27.2°C | 24.2°C | 33.5°C | 23.2°C | 396 mm | 85% | 2 m/s | 5.4 |
| 1983 | 33.8°C | 29.3°C | 24.7°C | 38.5°C | 23.0°C | 157 mm | 76% | 1.9 m/s | — |
| 1982 | 30.0°C | 27.2°C | 24.4°C | 33.5°C | 22.7°C | 471 mm | 87% | 2.2 m/s | — |
| 1981 | 29.6°C | 27.1°C | 24.5°C | 31.5°C | 23.4°C | 588 mm | 89% | 2.5 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 30.9°C with lows near 24.8°C (mean 27.9°C), based on 45 years of NASA POWER data.
January averages 371 mm of rainfall in Adelaide River, a relatively wet time of year. The wettest on record was 685 mm in 1997.
The hottest January reached 39.2°C in 2019. The coldest dipped to 21°C in 2005.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.2°C — but days and nights have moved in opposite directions. Overnight lows rose from 24.4°C to 25.2°C while daytime highs eased from 31.1°C to 30.8°C, narrowing the gap between day and night.
January is close to Adelaide River's year-round average and a relatively wet time of year, so plan for around 30.9°C daytime highs and 24.8°C at night.
Not quite — January is the 8th coolest month in Adelaide River, averaging 27.9°C.
For January in Adelaide River, pack light, breathable clothing and sun protection, with typical highs of 30.9°C and lows of 24.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 86% — quite humid.
Average wind speed in January is 2.1 m/s. The windiest January on record averaged 3.2 m/s (2024).
The wettest January on record was 1997 with 685 mm. On average, January sees 371 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 Adelaide River 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.
