January is one of the warmer months of the year in Byron Bay, with average highs near 25.8°C and lows around 23.5°C (mean 24.7°C). It is a relatively wet time of year, averaging 146 mm of rainfall and 78% relative humidity across the period.
January is one of the warmer months of the year in Byron Bay. Across 45 years of records, the warmest January in Byron Bay was 2024 — when the month averaged 25.9°C — while the coldest was 1997 at 23.2°C. Typical January days reach 25.8°C with nights near 23.5°C. The long-term trend is warming, about 0.2°C per decade.
January is a relatively wet time of year in Byron Bay, averaging 146 mm of rainfall. The wettest January on record was 2013 with 382 mm, while the driest was 2019 at 7 mm.
Relative humidity in Byron Bay during January averages 78%. The most humid January was 2024 at 83%, and the least humid was 2003 at 72%.
January receives about 6.5 kWh/m²/day of solar energy in Byron Bay. The sunniest January was 1985 at 7.7 kWh/m²/day, and the cloudiest was 2024 at 5.4.
Average wind speed in Byron Bay during January is 5.5 m/s. The windiest Januarys were 1995, 2005 and 2013 at 6.3 m/s, while the calmest were 1981 and 1993 at 4.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.4°C | 24.6°C | 24.6°C | 25.0°C | 24.9°C | +0.5°C |
| Avg High | 25.6°C | 25.8°C | 25.7°C | 26.1°C | 25.9°C | +0.3°C |
| Avg Low | 23.2°C | 23.5°C | 23.5°C | 23.9°C | 23.9°C | +0.7°C |
| Avg Rain | 132 mm | 132 mm | 148 mm | 167 mm | 148 mm | +16 mm |
January temperatures in Byron Bay have risen by about 0.5°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 20.6°C (1997) to a record high of 31.1°C (2000).
Rainfall in January is a relatively wet time of year, averaging 146 mm, with a wettest year of 382 mm.
A quieter season to visit Byron Bay
If your dates are flexible, the more temperate months of November and October tend to be the most comfortable for visiting Byron Bay. That said, January — with days averaging 25.8°C and nights around 23.5°C (mean 24.7°C) and higher rainfall (146 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 | 26.2°C | 25.0°C | 23.8°C | 30.6°C | 21.8°C | 150 mm | 77% | 5 m/s | 6.5 |
| 2024 🔥 | 26.8°C | 25.9°C | 25.0°C | 29.9°C | 23.5°C | 227 mm | 83% | 5.7 m/s | 5.4 |
| 2023 | 25.3°C | 24.2°C | 23.1°C | 28.6°C | 21.5°C | 110 mm | 78% | 5 m/s | 6.7 |
| 2022 | 25.3°C | 24.5°C | 23.6°C | 26.9°C | 22.5°C | 130 mm | 80% | 6 m/s | 6 |
| 2021 | 25.4°C | 24.4°C | 23.3°C | 27.4°C | 22.2°C | 92 mm | 77% | 5.1 m/s | 6.5 |
| 2020 | 26.6°C | 25.6°C | 24.6°C | 28.6°C | 23.3°C | 178 mm | 79% | 5.5 m/s | 6.6 |
| 2019 | 26.7°C | 25.7°C | 24.6°C | 28.4°C | 23.7°C | 7 mm | 74% | 5.1 m/s | 7.3 |
| 2018 | 26.2°C | 25.0°C | 23.8°C | 29.9°C | 21.5°C | 61 mm | 76% | 5.3 m/s | 7.5 |
| 2017 | 27.0°C | 25.7°C | 24.4°C | 30.2°C | 22.8°C | 145 mm | 78% | 5.7 m/s | 6.8 |
| 2016 | 25.6°C | 24.5°C | 23.3°C | 28.6°C | 21.3°C | 116 mm | 77% | 5.7 m/s | 6.5 |
| 2015 | 26.3°C | 25.3°C | 24.3°C | 30.4°C | 22.5°C | 202 mm | 80% | 5 m/s | 6.2 |
| 2014 | 25.6°C | 24.5°C | 23.3°C | 29.2°C | 22.2°C | 87 mm | 74% | 5.5 m/s | 6.2 |
| 2013 🌧️ | 26.2°C | 25.1°C | 24.0°C | 29.0°C | 22.6°C | 382 mm | 78% | 6.3 m/s | 6 |
| 2012 | 25.0°C | 24.0°C | 23.1°C | 29.2°C | 21.4°C | 341 mm | 78% | 5.7 m/s | 5.7 |
| 2011 | 25.4°C | 24.5°C | 23.5°C | 27.0°C | 21.8°C | 241 mm | 80% | 5.5 m/s | 6.2 |
| 2010 | 26.8°C | 25.6°C | 24.3°C | 30.0°C | 22.4°C | 91 mm | 75% | 4.9 m/s | 7 |
| 2009 | 25.9°C | 24.8°C | 23.8°C | 28.9°C | 21.9°C | 101 mm | 77% | 5.8 m/s | 6 |
| 2008 | 25.2°C | 24.4°C | 23.5°C | 26.4°C | 22.6°C | 320 mm | 83% | 6.1 m/s | 5.6 |
| 2007 | 25.4°C | 24.3°C | 23.2°C | 28.6°C | 21.4°C | 86 mm | 78% | 5.2 m/s | 6.7 |
| 2006 | 26.5°C | 25.5°C | 24.5°C | 29.0°C | 23.4°C | 295 mm | 80% | 5.2 m/s | 6.6 |
| 2005 | 25.9°C | 24.8°C | 23.6°C | 28.6°C | 21.3°C | 144 mm | 79% | 6.3 m/s | 6.3 |
| 2004 | 26.9°C | 25.6°C | 24.2°C | 30.0°C | 22.0°C | 249 mm | 80% | 5.7 m/s | 6.3 |
| 2003 | 25.1°C | 23.9°C | 22.7°C | 27.5°C | 21.4°C | 18 mm | 72% | 5.9 m/s | 7 |
| 2002 | 26.1°C | 24.8°C | 23.5°C | 31.1°C | 21.6°C | 47 mm | 75% | 6.1 m/s | 6.7 |
| 2001 | 25.5°C | 24.5°C | 23.4°C | 28.1°C | 22.0°C | 98 mm | 77% | 5.3 m/s | 7 |
| 2000 | 24.5°C | 23.3°C | 22.1°C | 31.1°C | 21.0°C | 121 mm | 79% | 5.7 m/s | 6.4 |
| 1999 | 26.1°C | 25.0°C | 24.0°C | 28.8°C | 22.9°C | 222 mm | 79% | 5 m/s | 6.3 |
| 1998 | 26.5°C | 25.5°C | 24.5°C | 29.9°C | 23.0°C | 72 mm | 77% | 5.3 m/s | 6.3 |
| 1997 ❄️ | 24.2°C | 23.2°C | 22.2°C | 26.1°C | 20.6°C | 105 mm | 75% | 6.2 m/s | 6.3 |
| 1996 | 26.2°C | 25.1°C | 24.0°C | 30.1°C | 21.6°C | 248 mm | 79% | 5 m/s | 6.4 |
| 1995 | 25.3°C | 24.1°C | 22.8°C | 28.7°C | 21.6°C | 107 mm | 76% | 6.3 m/s | 6.4 |
| 1994 | 26.1°C | 24.9°C | 23.7°C | 29.1°C | 21.9°C | 149 mm | 79% | 6 m/s | 6.2 |
| 1993 | 25.8°C | 24.6°C | 23.5°C | 27.0°C | 21.3°C | 74 mm | 78% | 4.7 m/s | 6.9 |
| 1992 | 25.7°C | 24.5°C | 23.3°C | 27.6°C | 22.0°C | 112 mm | 79% | 5.7 m/s | 6.7 |
| 1991 | 26.6°C | 25.4°C | 24.1°C | 29.1°C | 22.2°C | 95 mm | 75% | 5.4 m/s | 6.4 |
| 1990 | 25.1°C | 23.8°C | 22.5°C | 28.1°C | 20.7°C | 140 mm | 78% | 5.5 m/s | 6.4 |
| 1989 | 24.9°C | 23.9°C | 22.9°C | 27.0°C | 21.7°C | 202 mm | 76% | 5.4 m/s | 6.6 |
| 1988 | 25.2°C | 24.2°C | 23.1°C | 27.6°C | 20.9°C | 202 mm | 77% | 5.9 m/s | 6.4 |
| 1987 | 26.9°C | 25.6°C | 24.3°C | 29.2°C | 22.4°C | 116 mm | 78% | 5.3 m/s | 6.8 |
| 1986 | 25.4°C | 24.2°C | 22.9°C | 27.6°C | 21.6°C | 100 mm | 74% | 5.6 m/s | 6.7 |
| 1985 | 26.4°C | 25.0°C | 23.5°C | 30.4°C | 21.6°C | 58 mm | 74% | 5.4 m/s | 7.7 |
| 1984 | 24.5°C | 23.4°C | 22.4°C | 26.6°C | 20.8°C | 137 mm | 79% | 5.3 m/s | 5.7 |
| 1983 | 25.2°C | 23.9°C | 22.6°C | 28.8°C | 21.2°C | 74 mm | 75% | 5.1 m/s | — |
| 1982 | 26.3°C | 25.1°C | 23.8°C | 30.5°C | 22.1°C | 257 mm | 79% | 5.6 m/s | — |
| 1981 | 25.2°C | 24.1°C | 23.0°C | 27.4°C | 21.6°C | 45 mm | 77% | 4.7 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 25.8°C with lows near 23.5°C (mean 24.7°C), based on 45 years of NASA POWER data.
January averages 146 mm of rainfall in Byron Bay, a relatively wet time of year. The wettest on record was 382 mm in 2013.
The hottest January reached 31.1°C in 2000. The coldest dipped to 20.6°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 0.5°C. Daytime highs moved from 25.5°C to 25.8°C and overnight lows from 23.1°C to 23.8°C over the same span.
January is one of the warmer months of the year in Byron Bay and a relatively wet time of year, so plan for around 25.8°C daytime highs and 23.5°C at night.
Not quite — January is the 11th coolest month in Byron Bay, averaging 24.7°C.
For January in Byron Bay, pack light layers you can adjust through the day, with typical highs of 25.8°C and lows of 23.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 78% — quite humid.
Average wind speed in January is 5.5 m/s. The windiest January on record averaged 6.3 m/s (1995).
The wettest January on record was 2013 with 382 mm. On average, January sees 146 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 Byron Bay 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.
