January is one of the warmer months of the year in Mandurah, with average highs near 26.8°C and lows around 19°C (mean 22.9°C). It is one of the drier months, averaging 15 mm of rainfall and 61% relative humidity across the period.
January is one of the warmer months of the year in Mandurah. Across 45 years of records, the warmest January in Mandurah was 2012 — when the month averaged 24.6°C — while the coldest was 1982 at 21°C. Typical January days reach 26.8°C with nights near 19°C. The long-term trend is warming, about 0.2°C per decade.
January is one of the drier months in Mandurah, averaging 15 mm of rainfall. The wettest January on record was 1982 with 115 mm, while the driest were 1984, 2005 and 2022 at 0 mm.
Relative humidity in Mandurah during January averages 61%. The most humid January was 1982 at 67%, and the least humid was 1981 at 55%.
January receives about 8.2 kWh/m²/day of solar energy in Mandurah. The sunniest January was 2005 at 8.7 kWh/m²/day, and the cloudiest were 1989 and 2016 at 7.3.
Average wind speed in Mandurah during January is 5.9 m/s. The windiest Januarys were 1996, 1999 and 2005 at 6.4 m/s, while the calmest was 2016 at 5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.6°C | 22.8°C | 22.5°C | 23.2°C | 23.7°C | +1.1°C |
| Avg High | 26.7°C | 26.8°C | 26.2°C | 27.0°C | 27.6°C | +0.9°C |
| Avg Low | 18.5°C | 18.8°C | 18.6°C | 19.4°C | 19.7°C | +1.2°C |
| Avg Rain | 16 mm | 10 mm | 18 mm | 23 mm | 4 mm | -12 mm |
January temperatures in Mandurah have risen by about 1.5°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 12.8°C (2006) to a record high of 38.9°C (2025).
Rainfall in January is one of the drier months, averaging 15 mm, with a wettest year of 115 mm.
One of the best times to visit Mandurah
January is one of the best times to visit Mandurah. Expect days averaging 26.8°C and nights around 19°C (mean 22.9°C) — warmer than Mandurah's yearly average — with low rainfall (15 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 | 27.9°C | 24.4°C | 20.9°C | 38.9°C | 16.9°C | 4 mm | 63% | 5.5 m/s | 8 |
| 2024 | 27.7°C | 24.0°C | 20.2°C | 35.9°C | 17.4°C | 13 mm | 62% | 5.8 m/s | 8.4 |
| 2023 | 27.3°C | 23.1°C | 18.9°C | 33.7°C | 15.6°C | 1 mm | 58% | 6.1 m/s | 8.6 |
| 2022 | 28.9°C | 24.5°C | 20.1°C | 36.3°C | 17.0°C | 0 mm | 57% | 6 m/s | 8.6 |
| 2021 | 28.0°C | 23.8°C | 19.5°C | 34.0°C | 16.2°C | 2 mm | 57% | 6.2 m/s | 8.5 |
| 2020 | 25.6°C | 22.2°C | 18.8°C | 33.8°C | 14.2°C | 3 mm | 63% | 6.2 m/s | 8.5 |
| 2019 | 25.0°C | 21.7°C | 18.4°C | 31.6°C | 14.4°C | 8 mm | 64% | 6 m/s | 8.4 |
| 2018 | 26.2°C | 22.4°C | 18.5°C | 33.2°C | 15.8°C | 89 mm | 64% | 6.3 m/s | 8.3 |
| 2017 | 25.9°C | 22.1°C | 18.4°C | 33.4°C | 16.0°C | 21 mm | 61% | 6 m/s | 8.3 |
| 2016 | 27.2°C | 23.7°C | 20.1°C | 34.4°C | 15.5°C | 45 mm | 63% | 5 m/s | 7.3 |
| 2015 | 27.4°C | 23.3°C | 19.2°C | 34.1°C | 16.1°C | 3 mm | 59% | 5.5 m/s | 8.3 |
| 2014 | 26.9°C | 23.3°C | 19.7°C | 37.5°C | 15.7°C | 2 mm | 61% | 5.8 m/s | 8.5 |
| 2013 | 26.9°C | 23.3°C | 19.7°C | 34.6°C | 16.6°C | 12 mm | 63% | 5.9 m/s | 7.9 |
| 2012 🔥 | 28.7°C | 24.6°C | 20.5°C | 36.1°C | 15.7°C | 14 mm | 61% | 5.6 m/s | 8 |
| 2011 | 27.2°C | 23.6°C | 20.0°C | 33.9°C | 17.5°C | 30 mm | 64% | 5.5 m/s | 7.7 |
| 2010 | 28.2°C | 23.6°C | 19.1°C | 36.4°C | 15.8°C | 1 mm | 58% | 6 m/s | 8.5 |
| 2009 | 27.3°C | 23.5°C | 19.7°C | 33.9°C | 17.0°C | 9 mm | 63% | 5.8 m/s | 8 |
| 2008 | 27.8°C | 23.6°C | 19.3°C | 33.9°C | 15.8°C | 1 mm | 60% | 6 m/s | 8.1 |
| 2007 | 24.5°C | 21.3°C | 18.2°C | 33.2°C | 15.1°C | 20 mm | 66% | 5.7 m/s | 7.7 |
| 2006 | 25.8°C | 21.6°C | 17.5°C | 31.7°C | 12.8°C | 53 mm | 66% | 6.2 m/s | 7.4 |
| 2005 | 25.9°C | 22.0°C | 18.1°C | 33.1°C | 14.9°C | 0 mm | 63% | 6.4 m/s | 8.7 |
| 2004 | 27.0°C | 22.9°C | 18.7°C | 33.7°C | 15.7°C | 3 mm | 63% | 5.8 m/s | 8.4 |
| 2003 | 26.5°C | 22.4°C | 18.2°C | 33.6°C | 14.8°C | 3 mm | 60% | 5.9 m/s | 8.5 |
| 2002 | 26.1°C | 22.2°C | 18.2°C | 31.6°C | 14.7°C | 11 mm | 61% | 5.7 m/s | 8 |
| 2001 | 25.1°C | 22.1°C | 19.1°C | 31.2°C | 15.4°C | 4 mm | 67% | 5.8 m/s | 8.1 |
| 2000 | 26.4°C | 22.9°C | 19.4°C | 32.6°C | 16.8°C | 73 mm | 64% | 5.6 m/s | 7.7 |
| 1999 | 26.7°C | 22.7°C | 18.7°C | 33.5°C | 14.8°C | 17 mm | 64% | 6.4 m/s | 8.2 |
| 1998 | 26.9°C | 23.0°C | 19.0°C | 35.5°C | 15.0°C | 5 mm | 61% | 5.6 m/s | 8.4 |
| 1997 | 28.1°C | 23.7°C | 19.4°C | 34.7°C | 15.4°C | 1 mm | 58% | 5.8 m/s | 8.3 |
| 1996 | 26.8°C | 22.5°C | 18.3°C | 33.5°C | 14.6°C | 4 mm | 60% | 6.4 m/s | 8.2 |
| 1995 | 27.5°C | 23.5°C | 19.5°C | 33.0°C | 15.6°C | 2 mm | 61% | 6.2 m/s | 8.6 |
| 1994 | 25.7°C | 21.8°C | 18.0°C | 36.6°C | 14.1°C | 2 mm | 62% | 6.3 m/s | 8.3 |
| 1993 | 26.4°C | 22.7°C | 19.0°C | 32.2°C | 15.5°C | 3 mm | 63% | 5.7 m/s | 8.3 |
| 1992 | 28.2°C | 24.0°C | 19.8°C | 33.6°C | 15.8°C | 3 mm | 57% | 5.4 m/s | 8.1 |
| 1991 | 27.1°C | 23.1°C | 19.0°C | 35.6°C | 14.5°C | 5 mm | 58% | 5.9 m/s | 8.4 |
| 1990 | 25.0°C | 21.2°C | 17.4°C | 29.6°C | 13.6°C | 56 mm | 63% | 6.1 m/s | 7.7 |
| 1989 | 27.5°C | 23.5°C | 19.4°C | 36.3°C | 14.9°C | 16 mm | 58% | 5.7 m/s | 7.3 |
| 1988 | 25.4°C | 21.7°C | 18.1°C | 36.2°C | 13.7°C | 4 mm | 61% | 5.8 m/s | 8 |
| 1987 | 25.4°C | 21.5°C | 17.7°C | 30.4°C | 15.2°C | 3 mm | 62% | 6 m/s | 8 |
| 1986 | 28.5°C | 24.0°C | 19.5°C | 36.3°C | 15.5°C | 2 mm | 56% | 5.9 m/s | 8.2 |
| 1985 | 25.9°C | 21.9°C | 18.0°C | 35.3°C | 14.7°C | 3 mm | 62% | 6.1 m/s | 8.5 |
| 1984 | 27.6°C | 23.2°C | 18.8°C | 35.7°C | 15.3°C | 0 mm | 57% | 5.8 m/s | 8.2 |
| 1983 | 27.4°C | 23.2°C | 19.1°C | 35.5°C | 15.3°C | 1 mm | 58% | 5.9 m/s | — |
| 1982 ❄️ 🌧️ | 24.4°C | 21.0°C | 17.6°C | 33.2°C | 14.8°C | 115 mm | 67% | 5.9 m/s | — |
| 1981 | 28.4°C | 23.4°C | 18.5°C | 37.3°C | 15.2°C | 1 mm | 55% | 6.1 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 26.8°C with lows near 19°C (mean 22.9°C), based on 45 years of NASA POWER data.
January averages 15 mm of rainfall in Mandurah, one of the drier months. The wettest on record was 115 mm in 1982.
The hottest January reached 38.9°C in 2025. The coldest dipped to 12.8°C in 2006.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 1.5°C. Daytime highs moved from 26.7°C to 28°C and overnight lows from 18.4°C to 19.9°C over the same span.
January is one of the warmer months of the year in Mandurah and one of the drier months, so plan for around 26.8°C daytime highs and 19°C at night.
Not quite — January is the 11th coolest month in Mandurah, averaging 22.9°C.
For January in Mandurah, pack light layers you can adjust through the day, with typical highs of 26.8°C and lows of 19°C.
Relative humidity in January averages 61% — moderately humid.
Average wind speed in January is 5.9 m/s. The windiest January on record averaged 6.4 m/s (1996).
The wettest January on record was 1982 with 115 mm. On average, January sees 15 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 Mandurah 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.
