July is one of the cooler months of the year in Mandurah, with average highs near 17.1°C and lows around 13.4°C (mean 15.3°C). It is a relatively wet time of year, averaging 157 mm of rainfall and 74% relative humidity across the period.
July is one of the cooler months of the year in Mandurah. Across 45 years of records, the warmest Julys in Mandurah were 1996 and 2024 — when the month averaged 16.2°C — while the coldest was 1986 at 13.9°C. Typical July days reach 17.1°C with nights near 13.4°C. The long-term July temperature trend is broadly flat.
July is a relatively wet time of year in Mandurah, averaging 157 mm of rainfall. The wettest July on record was 2000 with 290 mm, while the driest was 2012 at 62 mm.
Relative humidity in Mandurah during July averages 74%. The most humid July was 2015 at 76%, and the least humid was 2006 at 71%.
July receives about 2.6 kWh/m²/day of solar energy in Mandurah. The sunniest Julys were 2005, 2012 and 2020 at 2.9 kWh/m²/day, and the cloudiest were 2007, 2017 and 2021, among others at 2.4.
Average wind speed in Mandurah during July is 5.5 m/s. The windiest July was 1996 at 7.7 m/s, while the calmest were 2012 and 2019 at 4.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.0°C | 15.3°C | 15.3°C | 15.2°C | 15.7°C | +0.7°C |
| Avg High | 16.7°C | 17.1°C | 17.1°C | 17.2°C | 17.6°C | +0.9°C |
| Avg Low | 13.2°C | 13.5°C | 13.5°C | 13.2°C | 13.7°C | +0.5°C |
| Avg Rain | 166 mm | 177 mm | 177 mm | 130 mm | 124 mm | -41 mm |
July temperatures in Mandurah have risen by about 0.5°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 8°C (1997) to a record high of 21.7°C (2001).
Rainfall in July is a relatively wet time of year, averaging 157 mm, with a wettest year of 290 mm.
A quieter season to visit Mandurah
If your dates are flexible, the more temperate months of March and December tend to be the most comfortable for visiting Mandurah. That said, July — with days averaging 17.1°C and nights around 13.4°C (mean 15.3°C) and higher rainfall (157 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 | 16.9°C | 15.0°C | 13.1°C | 20.9°C | 9.7°C | 132 mm | 74% | 5.6 m/s | 2.6 |
| 2024 | 18.2°C | 16.2°C | 14.1°C | 20.8°C | 11.0°C | 149 mm | 74% | 6 m/s | 2.7 |
| 2023 | 17.2°C | 15.4°C | 13.7°C | 19.3°C | 9.8°C | 87 mm | 74% | 5.6 m/s | 2.7 |
| 2022 | 17.8°C | 15.6°C | 13.4°C | 21.1°C | 10.4°C | 120 mm | 74% | 5.2 m/s | 2.6 |
| 2021 | 17.2°C | 15.9°C | 14.6°C | 20.0°C | 12.6°C | 190 mm | 74% | 6.7 m/s | 2.4 |
| 2020 | 18.0°C | 15.8°C | 13.6°C | 20.9°C | 9.9°C | 68 mm | 75% | 5.4 m/s | 2.9 |
| 2019 | 17.7°C | 15.6°C | 13.4°C | 19.8°C | 10.2°C | 67 mm | 76% | 4.4 m/s | 2.7 |
| 2018 | 17.7°C | 15.9°C | 14.2°C | 20.3°C | 10.6°C | 127 mm | 74% | 6.1 m/s | 2.6 |
| 2017 | 17.3°C | 15.7°C | 14.1°C | 21.3°C | 11.7°C | 150 mm | 73% | 6.1 m/s | 2.4 |
| 2016 | 16.3°C | 14.2°C | 12.1°C | 19.7°C | 9.2°C | 75 mm | 74% | 5.7 m/s | 2.7 |
| 2015 | 17.5°C | 15.4°C | 13.3°C | 20.1°C | 9.9°C | 123 mm | 76% | 4.7 m/s | 2.6 |
| 2014 | 17.1°C | 15.3°C | 13.6°C | 20.4°C | 10.4°C | 195 mm | 76% | 5.5 m/s | 2.5 |
| 2013 | 17.3°C | 15.4°C | 13.5°C | 20.9°C | 9.9°C | 185 mm | 72% | 5.3 m/s | 2.6 |
| 2012 | 17.1°C | 14.5°C | 11.9°C | 20.3°C | 9.7°C | 62 mm | 73% | 4.4 m/s | 2.9 |
| 2011 | 17.0°C | 15.1°C | 13.3°C | 19.6°C | 8.6°C | 171 mm | 76% | 5.5 m/s | 2.5 |
| 2010 | 16.9°C | 14.8°C | 12.6°C | 19.3°C | 9.4°C | 144 mm | 72% | 4.8 m/s | 2.8 |
| 2009 | 16.3°C | 14.5°C | 12.8°C | 18.7°C | 9.9°C | 159 mm | 74% | 5.2 m/s | 2.8 |
| 2008 | 16.9°C | 15.0°C | 13.1°C | 19.3°C | 11.0°C | 233 mm | 74% | 5.8 m/s | 2.5 |
| 2007 | 17.9°C | 16.1°C | 14.3°C | 20.5°C | 11.6°C | 224 mm | 73% | 6.6 m/s | 2.4 |
| 2006 | 17.4°C | 15.1°C | 12.9°C | 21.2°C | 9.5°C | 130 mm | 71% | 5.2 m/s | 2.8 |
| 2005 | 16.9°C | 15.2°C | 13.4°C | 20.4°C | 8.3°C | 78 mm | 74% | 4.8 m/s | 2.9 |
| 2004 | 16.6°C | 14.8°C | 13.0°C | 18.8°C | 10.2°C | 158 mm | 73% | 4.9 m/s | 2.8 |
| 2003 | 16.8°C | 15.3°C | 13.7°C | 19.1°C | 10.6°C | 172 mm | 74% | 5.5 m/s | 2.4 |
| 2002 | 17.4°C | 15.9°C | 14.3°C | 20.4°C | 9.8°C | 155 mm | 72% | 6 m/s | 2.5 |
| 2001 | 17.6°C | 15.3°C | 13.1°C | 21.7°C | 10.1°C | 169 mm | 72% | 4.8 m/s | 2.8 |
| 2000 🌧️ | 16.9°C | 15.4°C | 14.0°C | 19.2°C | 9.5°C | 290 mm | 74% | 6.7 m/s | 2.6 |
| 1999 | 18.1°C | 16.0°C | 13.9°C | 21.3°C | 11.3°C | 154 mm | 74% | 5.9 m/s | 2.6 |
| 1998 | 16.9°C | 14.7°C | 12.6°C | 19.5°C | 9.8°C | 161 mm | 75% | 5.2 m/s | 2.5 |
| 1997 | 16.9°C | 14.3°C | 11.8°C | 20.1°C | 8.0°C | 159 mm | 73% | 5.3 m/s | 2.8 |
| 1996 🔥 | 17.7°C | 16.2°C | 14.6°C | 20.7°C | 11.1°C | 239 mm | 74% | 7.7 m/s | 2.4 |
| 1995 | 17.2°C | 15.6°C | 14.1°C | 20.1°C | 10.8°C | 262 mm | 75% | 6.1 m/s | 2.4 |
| 1994 | 17.2°C | 15.8°C | 14.3°C | 21.4°C | 11.0°C | 138 mm | 75% | 4.9 m/s | 2.7 |
| 1993 | 16.5°C | 14.8°C | 13.1°C | 19.7°C | 9.2°C | 162 mm | 76% | 6.4 m/s | 2.6 |
| 1992 | 17.5°C | 16.0°C | 14.4°C | 20.1°C | 11.5°C | 96 mm | 75% | 4.9 m/s | 2.4 |
| 1991 | 17.2°C | 15.6°C | 14.0°C | 20.1°C | 10.3°C | 180 mm | 76% | 5.8 m/s | 2.4 |
| 1990 | 16.0°C | 14.2°C | 12.5°C | 18.7°C | 8.9°C | 216 mm | 73% | 6.3 m/s | 2.8 |
| 1989 | 16.5°C | 14.9°C | 13.4°C | 18.3°C | 10.6°C | 178 mm | 73% | 4.9 m/s | 2.5 |
| 1988 | 17.2°C | 15.2°C | 13.2°C | 19.3°C | 8.7°C | 174 mm | 74% | 5.8 m/s | 2.6 |
| 1987 | 17.1°C | 15.3°C | 13.5°C | 20.7°C | 9.4°C | 166 mm | 74% | 5.3 m/s | 2.6 |
| 1986 ❄️ | 15.6°C | 13.9°C | 12.2°C | 18.4°C | 9.0°C | 197 mm | 75% | 5.6 m/s | 2.6 |
| 1985 | 17.7°C | 15.5°C | 13.3°C | 20.0°C | 9.7°C | 111 mm | 73% | 5.2 m/s | 2.6 |
| 1984 | 16.3°C | 14.6°C | 12.9°C | 19.9°C | 9.8°C | 109 mm | 76% | 5.9 m/s | 2.4 |
| 1983 | 17.1°C | 15.3°C | 13.6°C | 19.5°C | 9.5°C | 165 mm | 72% | 5 m/s | — |
| 1982 | 16.7°C | 14.9°C | 13.2°C | 20.0°C | 9.5°C | 209 mm | 73% | 5.3 m/s | — |
| 1981 | 16.5°C | 15.0°C | 13.4°C | 18.8°C | 10.5°C | 184 mm | 75% | 5.5 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 17.1°C with lows near 13.4°C (mean 15.3°C), based on 45 years of NASA POWER data.
July averages 157 mm of rainfall in Mandurah, a relatively wet time of year. The wettest on record was 290 mm in 2000.
The hottest July reached 21.7°C in 2001. The coldest dipped to 8°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 0.5°C. Daytime highs moved from 16.9°C to 17.5°C and overnight lows from 13.3°C to 13.8°C over the same span.
July is one of the cooler months of the year in Mandurah and a relatively wet time of year, so plan for around 17.1°C daytime highs and 13.4°C at night.
Not quite — July is the 2nd coolest month in Mandurah, averaging 15.3°C.
For July in Mandurah, pack light layers you can adjust through the day, with typical highs of 17.1°C and lows of 13.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 74% — moderately humid.
Average wind speed in July is 5.5 m/s. The windiest July on record averaged 7.7 m/s (1996).
The wettest July on record was 2000 with 290 mm. On average, July sees 157 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 July, 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 July specifically, along with year-by-year records and how the month has changed over the decades.
