January is one of the warmer months of the year in Bunbury, with average highs near 30.8°C and lows around 15.9°C (mean 23.4°C). It is one of the drier months, averaging 14 mm of rainfall and 53% relative humidity across the period.
January is one of the warmer months of the year in Bunbury. Across 45 years of records, the warmest January in Bunbury was 2022 — when the month averaged 25.3°C — while the coldest was 1982 at 20.7°C. Typical January days reach 30.8°C with nights near 15.9°C. The long-term trend is warming, about 0.3°C per decade.
January is one of the drier months in Bunbury, averaging 14 mm of rainfall. The wettest January on record was 1982 with 121 mm, while the driest was 2022 at 0 mm.
Relative humidity in Bunbury during January averages 53%. The most humid January was 1982 at 62%, and the least humid was 1986 at 47%.
January receives about 7.9 kWh/m²/day of solar energy in Bunbury. The sunniest Januarys were 1985, 1995 and 2017 at 8.3 kWh/m²/day, and the cloudiest were 1989 and 2016 at 6.9.
Average wind speed in Bunbury during January is 4.3 m/s. The windiest January was 1999 at 4.9 m/s, while the calmest were 1982 and 1993 at 3.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.0°C | 23.2°C | 23.0°C | 23.7°C | 24.3°C | +1.3°C |
| Avg High | 30.4°C | 30.7°C | 30.3°C | 31.1°C | 31.9°C | +1.5°C |
| Avg Low | 15.5°C | 15.7°C | 15.7°C | 16.4°C | 16.8°C | +1.3°C |
| Avg Rain | 20 mm | 7 mm | 14 mm | 23 mm | 5 mm | -15 mm |
January temperatures in Bunbury have risen by about 1.8°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 8.7°C (2006) to a record high of 42°C (2025).
Rainfall in January is one of the drier months, averaging 14 mm, with a wettest year of 121 mm.
One of the best times to visit Bunbury
January is one of the best times to visit Bunbury. Expect days averaging 30.8°C and nights around 15.9°C (mean 23.4°C) — warmer than Bunbury's yearly average — with low rainfall (14 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 | 32.3°C | 25.0°C | 17.8°C | 42.0°C | 12.5°C | 6 mm | 53% | 4 m/s | 7.5 |
| 2024 | 32.4°C | 24.8°C | 17.2°C | 39.2°C | 13.4°C | 7 mm | 52% | 4.6 m/s | 8 |
| 2023 | 31.8°C | 23.8°C | 15.9°C | 36.9°C | 12.4°C | 1 mm | 49% | 4.6 m/s | 8.2 |
| 2022 🔥 | 33.0°C | 25.3°C | 17.6°C | 40.3°C | 14.0°C | 0 mm | 48% | 4.6 m/s | 8.2 |
| 2021 | 31.9°C | 24.4°C | 16.9°C | 37.7°C | 12.5°C | 8 mm | 48% | 4.8 m/s | 8.2 |
| 2020 | 30.0°C | 22.7°C | 15.5°C | 38.0°C | 10.0°C | 6 mm | 54% | 4.3 m/s | 8.2 |
| 2019 | 30.1°C | 22.6°C | 15.1°C | 37.7°C | 12.2°C | 9 mm | 54% | 4.2 m/s | 8 |
| 2018 | 30.0°C | 22.7°C | 15.3°C | 39.1°C | 12.4°C | 81 mm | 57% | 4.5 m/s | 8 |
| 2017 | 30.7°C | 22.9°C | 15.2°C | 36.9°C | 12.2°C | 2 mm | 51% | 4.3 m/s | 8.3 |
| 2016 | 31.1°C | 24.4°C | 17.7°C | 38.7°C | 13.2°C | 47 mm | 55% | 4.3 m/s | 6.9 |
| 2015 | 32.0°C | 24.1°C | 16.2°C | 38.2°C | 13.2°C | 3 mm | 50% | 4.2 m/s | 8 |
| 2014 | 31.4°C | 23.9°C | 16.4°C | 40.1°C | 11.6°C | 3 mm | 52% | 4.1 m/s | 8 |
| 2013 | 30.6°C | 23.7°C | 16.9°C | 37.1°C | 12.7°C | 11 mm | 55% | 4.3 m/s | 7.7 |
| 2012 | 31.7°C | 24.9°C | 18.0°C | 39.8°C | 13.1°C | 8 mm | 51% | 4.4 m/s | 7.6 |
| 2011 | 31.0°C | 23.9°C | 16.9°C | 37.0°C | 13.7°C | 63 mm | 55% | 4.1 m/s | 7.3 |
| 2010 | 32.1°C | 24.0°C | 15.9°C | 39.5°C | 11.8°C | 1 mm | 50% | 4.6 m/s | 7.9 |
| 2009 | 31.9°C | 24.1°C | 16.4°C | 37.2°C | 13.3°C | 3 mm | 55% | 4.2 m/s | 7.7 |
| 2008 | 31.6°C | 23.8°C | 16.0°C | 39.0°C | 12.1°C | 1 mm | 53% | 4.7 m/s | 7.5 |
| 2007 | 28.7°C | 22.2°C | 15.6°C | 38.4°C | 11.0°C | 21 mm | 57% | 4.1 m/s | 7.1 |
| 2006 | 28.8°C | 21.6°C | 14.4°C | 34.6°C | 8.7°C | 38 mm | 59% | 4.5 m/s | 7 |
| 2005 | 30.1°C | 22.6°C | 15.2°C | 38.9°C | 12.2°C | 1 mm | 54% | 4.3 m/s | 8.2 |
| 2004 | 31.3°C | 23.7°C | 16.0°C | 38.2°C | 12.0°C | 14 mm | 54% | 4.6 m/s | 8 |
| 2003 | 30.2°C | 22.8°C | 15.4°C | 36.7°C | 10.5°C | 5 mm | 51% | 4.4 m/s | 8.2 |
| 2002 | 30.0°C | 22.5°C | 15.1°C | 36.2°C | 10.0°C | 7 mm | 53% | 4.3 m/s | 8 |
| 2001 | 30.8°C | 23.4°C | 16.0°C | 37.1°C | 11.3°C | 3 mm | 55% | 4.1 m/s | 8 |
| 2000 | 29.5°C | 23.0°C | 16.5°C | 36.6°C | 12.9°C | 43 mm | 57% | 4.3 m/s | 7.2 |
| 1999 | 30.8°C | 23.3°C | 15.8°C | 39.9°C | 10.9°C | 7 mm | 55% | 4.9 m/s | 7.8 |
| 1998 | 31.3°C | 23.7°C | 16.1°C | 38.8°C | 11.6°C | 7 mm | 53% | 4.2 m/s | 8.1 |
| 1997 | 31.6°C | 23.8°C | 16.1°C | 38.0°C | 12.1°C | 3 mm | 52% | 4.5 m/s | 8 |
| 1996 | 29.9°C | 22.5°C | 15.1°C | 36.2°C | 11.5°C | 6 mm | 54% | 4.6 m/s | 8 |
| 1995 | 31.7°C | 24.0°C | 16.4°C | 37.4°C | 13.6°C | 1 mm | 52% | 4.7 m/s | 8.3 |
| 1994 | 30.1°C | 22.5°C | 14.9°C | 39.1°C | 10.5°C | 3 mm | 53% | 4.2 m/s | 8.1 |
| 1993 | 30.7°C | 23.2°C | 15.7°C | 37.6°C | 10.9°C | 3 mm | 55% | 3.9 m/s | 8 |
| 1992 | 31.8°C | 24.2°C | 16.5°C | 37.8°C | 11.5°C | 3 mm | 50% | 4.4 m/s | 7.9 |
| 1991 | 31.2°C | 23.6°C | 15.9°C | 41.7°C | 11.8°C | 8 mm | 51% | 4.4 m/s | 8.1 |
| 1990 | 28.3°C | 21.2°C | 14.1°C | 38.2°C | 9.9°C | 29 mm | 56% | 4.4 m/s | 7.5 |
| 1989 | 30.1°C | 23.4°C | 16.6°C | 39.1°C | 12.2°C | 29 mm | 52% | 4.2 m/s | 6.9 |
| 1988 | 29.5°C | 22.3°C | 15.0°C | 40.3°C | 9.1°C | 5 mm | 53% | 4.1 m/s | 7.9 |
| 1987 | 29.5°C | 21.9°C | 14.3°C | 35.0°C | 10.6°C | 5 mm | 54% | 4.2 m/s | 8 |
| 1986 | 32.5°C | 24.5°C | 16.5°C | 40.0°C | 11.2°C | 4 mm | 47% | 4.6 m/s | 8.2 |
| 1985 | 29.7°C | 22.3°C | 14.8°C | 39.3°C | 11.6°C | 9 mm | 55% | 4.2 m/s | 8.3 |
| 1984 | 31.7°C | 23.8°C | 15.9°C | 39.6°C | 11.7°C | 1 mm | 48% | 4.1 m/s | 7.8 |
| 1983 | 31.8°C | 24.1°C | 16.5°C | 39.3°C | 11.4°C | 3 mm | 49% | 4.3 m/s | — |
| 1982 ❄️ 🌧️ | 27.2°C | 20.7°C | 14.2°C | 35.0°C | 10.7°C | 121 mm | 62% | 3.9 m/s | — |
| 1981 | 31.7°C | 23.6°C | 15.6°C | 39.6°C | 11.3°C | 1 mm | 47% | 4.4 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 30.8°C with lows near 15.9°C (mean 23.4°C), based on 45 years of NASA POWER data.
January averages 14 mm of rainfall in Bunbury, one of the drier months. The wettest on record was 121 mm in 1982.
The hottest January reached 42°C in 2025. The coldest dipped to 8.7°C in 2006.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 1.8°C. Daytime highs moved from 30.4°C to 32.3°C and overnight lows from 15.4°C to 17.1°C over the same span.
January is one of the warmer months of the year in Bunbury and one of the drier months, so plan for around 30.8°C daytime highs and 15.9°C at night.
Not quite — January is the 11th coolest month in Bunbury, averaging 23.4°C.
For January in Bunbury, pack light, breathable clothing and sun protection, with typical highs of 30.8°C and lows of 15.9°C.
Relative humidity in January averages 53% — relatively dry.
Average wind speed in January is 4.3 m/s. The windiest January on record averaged 4.9 m/s (1999).
The wettest January on record was 1982 with 121 mm. On average, January sees 14 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 Bunbury 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.
