January is one of the warmer months of the year in Atherton, with average highs near 28.1°C and lows around 21°C (mean 24.6°C). It is a relatively wet time of year, averaging 341 mm of rainfall and 85% relative humidity across the period.
January is one of the warmer months of the year in Atherton. Across 45 years of records, the warmest January in Atherton was 1994 — when the month averaged 26.4°C — while the coldest was 1993 at 22.8°C. Typical January days reach 28.1°C with nights near 21°C. The long-term January temperature trend is broadly flat.
January is a relatively wet time of year in Atherton, averaging 341 mm of rainfall. The wettest January on record was 1981 with 1417 mm, while the driest was 1992 at 92 mm.
Relative humidity in Atherton during January averages 85%. The most humid January was 1991 at 93%, and the least humid was 1992 at 72%.
January receives about 6 kWh/m²/day of solar energy in Atherton. The sunniest January was 1988 at 7.3 kWh/m²/day, and the cloudiest was 2009 at 4.7.
Average wind speed in Atherton during January is 1.1 m/s. The windiest Januarys were 2013, 2014 and 2019, among others at 1.3 m/s, while the calmest was 1984 at 0.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.5°C | 24.4°C | 24.1°C | 24.7°C | 25.1°C | +0.6°C |
| Avg High | 28.4°C | 28.0°C | 27.4°C | 28.4°C | 28.5°C | +0.1°C |
| Avg Low | 20.6°C | 20.8°C | 20.8°C | 21.0°C | 21.8°C | +1.2°C |
| Avg Rain | 385 mm | 360 mm | 338 mm | 316 mm | 287 mm | -98 mm |
January temperatures in Atherton have risen by about 0.4°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 16.1°C (1989) to a record high of 38.4°C (1994).
Rainfall in January is a relatively wet time of year, averaging 341 mm, with a wettest year of 1417 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A quieter season to visit Atherton
If your dates are flexible, the more temperate months of October and September tend to be the most comfortable for visiting Atherton. That said, January — with days averaging 28.1°C and nights around 21°C (mean 24.6°C) and higher rainfall (341 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 | 30.0°C | 25.9°C | 21.9°C | 34.1°C | 19.2°C | 229 mm | 80% | 1 m/s | 5.9 |
| 2024 | 28.1°C | 25.3°C | 22.4°C | 30.3°C | 21.3°C | 236 mm | 88% | 0.9 m/s | 5.3 |
| 2023 | 26.6°C | 24.0°C | 21.3°C | 28.3°C | 20.0°C | 327 mm | 91% | 0.9 m/s | 5.2 |
| 2022 | 29.7°C | 25.7°C | 21.8°C | 35.4°C | 20.1°C | 280 mm | 81% | 1 m/s | 6 |
| 2021 | 26.3°C | 23.8°C | 21.3°C | 28.5°C | 18.9°C | 411 mm | 91% | 1 m/s | 5.2 |
| 2020 | 30.2°C | 26.1°C | 22.0°C | 36.0°C | 20.1°C | 242 mm | 81% | 1 m/s | 6.1 |
| 2019 | 27.4°C | 24.1°C | 20.8°C | 31.9°C | 18.2°C | 394 mm | 86% | 1.3 m/s | 5.6 |
| 2018 | 28.9°C | 25.0°C | 21.1°C | 37.3°C | 18.9°C | 273 mm | 82% | 1.2 m/s | 5.9 |
| 2017 | 29.3°C | 25.4°C | 21.6°C | 34.8°C | 18.2°C | 220 mm | 84% | 0.9 m/s | 6.1 |
| 2016 | 28.9°C | 24.7°C | 20.5°C | 32.9°C | 18.2°C | 106 mm | 81% | 0.9 m/s | 6.7 |
| 2015 | 30.2°C | 26.0°C | 21.7°C | 33.9°C | 19.2°C | 210 mm | 80% | 1.1 m/s | 6 |
| 2014 | 28.9°C | 24.9°C | 20.9°C | 37.3°C | 18.0°C | 296 mm | 82% | 1.3 m/s | 6.1 |
| 2013 | 29.0°C | 24.8°C | 20.7°C | 34.6°C | 18.4°C | 453 mm | 81% | 1.3 m/s | 6.2 |
| 2012 | 27.9°C | 24.2°C | 20.5°C | 33.3°C | 17.4°C | 299 mm | 85% | 0.9 m/s | 6.2 |
| 2011 | 26.8°C | 23.8°C | 20.8°C | 29.0°C | 17.6°C | 433 mm | 90% | 0.9 m/s | 5.8 |
| 2010 | 26.9°C | 24.2°C | 21.4°C | 29.3°C | 18.9°C | 477 mm | 89% | 1.2 m/s | 5.1 |
| 2009 | 26.4°C | 24.0°C | 21.5°C | 28.7°C | 20.3°C | 778 mm | 92% | 1 m/s | 4.7 |
| 2008 | 26.9°C | 24.1°C | 21.3°C | 29.0°C | 18.1°C | 401 mm | 90% | 1 m/s | 5.7 |
| 2007 | 28.3°C | 24.7°C | 21.1°C | 32.1°C | 19.0°C | 318 mm | 84% | 1 m/s | 5.6 |
| 2006 | 27.9°C | 24.4°C | 21.0°C | 35.3°C | 19.7°C | 368 mm | 86% | 1.1 m/s | 5.8 |
| 2005 | 26.7°C | 23.6°C | 20.6°C | 29.7°C | 17.3°C | 411 mm | 89% | 1 m/s | 5.7 |
| 2004 | 27.4°C | 24.4°C | 21.5°C | 31.3°C | 18.0°C | 271 mm | 88% | 0.9 m/s | 6.2 |
| 2003 | 28.0°C | 23.9°C | 19.8°C | 30.9°C | 16.2°C | 204 mm | 79% | 1.3 m/s | 5.8 |
| 2002 | 29.3°C | 25.4°C | 21.6°C | 33.2°C | 19.3°C | 180 mm | 82% | 1 m/s | 6.4 |
| 2001 | 26.3°C | 23.0°C | 19.7°C | 30.8°C | 17.0°C | 219 mm | 88% | 1.1 m/s | 6.2 |
| 2000 | 26.8°C | 23.5°C | 20.3°C | 30.0°C | 17.5°C | 231 mm | 88% | 1 m/s | 6.5 |
| 1999 | 27.2°C | 24.2°C | 21.2°C | 30.4°C | 19.3°C | 392 mm | 89% | 0.9 m/s | 6 |
| 1998 | 26.9°C | 24.4°C | 21.9°C | 29.5°C | 20.2°C | 612 mm | 92% | 1.1 m/s | 5.7 |
| 1997 | 26.7°C | 23.4°C | 20.2°C | 29.6°C | 18.8°C | 345 mm | 88% | 1.2 m/s | 6 |
| 1996 | 27.7°C | 24.4°C | 21.2°C | 32.1°C | 19.1°C | 326 mm | 86% | 1 m/s | 5.8 |
| 1995 | 29.6°C | 24.9°C | 20.1°C | 37.5°C | 17.8°C | 114 mm | 77% | 1.2 m/s | 6.8 |
| 1994 🔥 | 31.3°C | 26.4°C | 21.5°C | 38.4°C | 18.0°C | 418 mm | 75% | 1.2 m/s | 6.4 |
| 1993 ❄️ | 25.7°C | 22.8°C | 19.8°C | 29.2°C | 18.1°C | 345 mm | 89% | 1.2 m/s | 5.8 |
| 1992 | 31.5°C | 26.3°C | 21.0°C | 36.3°C | 18.2°C | 92 mm | 72% | 1 m/s | 6.9 |
| 1991 | 26.4°C | 24.0°C | 21.6°C | 28.8°C | 19.7°C | 828 mm | 93% | 0.9 m/s | 5.2 |
| 1990 | 27.2°C | 23.4°C | 19.6°C | 31.6°C | 16.9°C | 129 mm | 84% | 1.1 m/s | 7 |
| 1989 | 26.6°C | 23.3°C | 20.1°C | 28.8°C | 16.1°C | 295 mm | 88% | 1 m/s | 6.3 |
| 1988 | 28.4°C | 24.2°C | 20.0°C | 33.7°C | 17.4°C | 95 mm | 81% | 1.2 m/s | 7.3 |
| 1987 | 31.3°C | 26.3°C | 21.3°C | 34.8°C | 19.9°C | 101 mm | 74% | 1 m/s | 6.9 |
| 1986 | 28.0°C | 24.5°C | 21.0°C | 34.4°C | 19.1°C | 565 mm | 84% | 1.2 m/s | 5.7 |
| 1985 | 28.6°C | 24.5°C | 20.4°C | 33.6°C | 18.1°C | 252 mm | 80% | 1.1 m/s | 7.2 |
| 1984 | 27.4°C | 24.1°C | 20.8°C | 31.4°C | 19.6°C | 371 mm | 87% | 0.8 m/s | 6.2 |
| 1983 | 30.9°C | 25.8°C | 20.7°C | 37.0°C | 18.8°C | 106 mm | 73% | 1.1 m/s | — |
| 1982 | 29.2°C | 25.0°C | 20.8°C | 35.4°C | 18.2°C | 262 mm | 82% | 1 m/s | — |
| 1981 🌧️ | 25.6°C | 23.1°C | 20.6°C | 29.7°C | 17.2°C | 1417 mm | 92% | 1.1 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 28.1°C with lows near 21°C (mean 24.6°C), based on 45 years of NASA POWER data.
January averages 341 mm of rainfall in Atherton, a relatively wet time of year. The wettest on record was 1417 mm in 1981.
The hottest January reached 38.4°C in 1994. The coldest dipped to 16.1°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.4°C — but days and nights have moved in opposite directions. Overnight lows rose from 20.7°C to 21.7°C while daytime highs eased from 28.3°C to 28.1°C, narrowing the gap between day and night.
January is one of the warmer months of the year in Atherton and a relatively wet time of year, so plan for around 28.1°C daytime highs and 21°C at night.
Not quite — January is the 11th coolest month in Atherton, averaging 24.6°C.
For January in Atherton, pack light layers you can adjust through the day, with typical highs of 28.1°C and lows of 21°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 85% — quite humid.
Average wind speed in January is 1.1 m/s. The windiest January on record averaged 1.3 m/s (2003).
The wettest January on record was 1981 with 1417 mm. On average, January sees 341 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 Atherton 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.
