July is one of the cooler months of the year in Yanchep, with average highs near 17.7°C and lows around 11.6°C (mean 14.7°C). It is a relatively wet time of year, averaging 119 mm of rainfall and 75% relative humidity across the period.
July is one of the cooler months of the year in Yanchep. Across 45 years of records, the warmest July in Yanchep was 2024 — when the month averaged 16°C — while the coldest was 1986 at 12.8°C. Typical July days reach 17.7°C with nights near 11.6°C. The long-term trend is warming, about 0.3°C per decade.
July is a relatively wet time of year in Yanchep, averaging 119 mm of rainfall. The wettest July on record was 1995 with 206 mm, while the driest was 2020 at 39 mm.
Relative humidity in Yanchep during July averages 75%. The most humid July was 1991 at 80%, and the least humid was 2012 at 71%.
July receives about 2.8 kWh/m²/day of solar energy in Yanchep. The sunniest July was 2012 at 3.3 kWh/m²/day, and the cloudiest was 1984 at 2.4.
Average wind speed in Yanchep during July is 4.1 m/s. The windiest July was 1996 at 5.6 m/s, while the calmest was 2019 at 3.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.1°C | 14.5°C | 14.7°C | 14.8°C | 15.4°C | +1.3°C |
| Avg High | 17.1°C | 17.5°C | 17.6°C | 18.0°C | 18.4°C | +1.3°C |
| Avg Low | 11.2°C | 11.7°C | 11.7°C | 11.6°C | 12.3°C | +1.1°C |
| Avg Rain | 132 mm | 129 mm | 128 mm | 97 mm | 104 mm | -28 mm |
July temperatures in Yanchep have risen by about 1.1°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 5.2°C (2016) to a record high of 23.6°C (2022).
Rainfall in July is a relatively wet time of year, averaging 119 mm, with a wettest year of 206 mm.
A quieter season to visit Yanchep
If your dates are flexible, the more temperate months of December and April tend to be the most comfortable for visiting Yanchep. That said, July — with days averaging 17.7°C and nights around 11.6°C (mean 14.7°C) and higher rainfall (119 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 | 17.3°C | 14.4°C | 11.6°C | 22.1°C | 7.9°C | 121 mm | 74% | 4.1 m/s | 2.9 |
| 2024 🔥 | 19.1°C | 16.0°C | 12.8°C | 22.4°C | 8.4°C | 117 mm | 74% | 4.5 m/s | 2.9 |
| 2023 | 18.3°C | 15.2°C | 12.0°C | 21.3°C | 6.3°C | 72 mm | 72% | 4.1 m/s | 2.9 |
| 2022 | 18.8°C | 15.3°C | 11.8°C | 23.6°C | 7.4°C | 95 mm | 73% | 3.9 m/s | 2.9 |
| 2021 | 17.8°C | 15.8°C | 13.7°C | 20.2°C | 8.8°C | 182 mm | 75% | 4.9 m/s | 2.6 |
| 2020 | 19.1°C | 15.6°C | 12.0°C | 22.7°C | 7.3°C | 39 mm | 73% | 4 m/s | 3.1 |
| 2019 | 18.6°C | 15.3°C | 12.0°C | 21.3°C | 8.2°C | 65 mm | 76% | 3.2 m/s | 3 |
| 2018 | 18.2°C | 15.6°C | 13.0°C | 21.1°C | 7.6°C | 112 mm | 75% | 4.5 m/s | 2.8 |
| 2017 | 18.1°C | 15.7°C | 13.3°C | 23.2°C | 10.2°C | 112 mm | 72% | 4.4 m/s | 2.7 |
| 2016 | 17.0°C | 13.7°C | 10.3°C | 21.0°C | 5.2°C | 73 mm | 75% | 4.4 m/s | 3 |
| 2015 | 18.7°C | 15.2°C | 11.8°C | 22.3°C | 7.2°C | 105 mm | 75% | 3.5 m/s | 2.8 |
| 2014 | 17.7°C | 14.8°C | 11.9°C | 22.4°C | 7.5°C | 126 mm | 77% | 4.1 m/s | 2.8 |
| 2013 | 18.1°C | 14.8°C | 11.6°C | 21.9°C | 6.9°C | 119 mm | 72% | 4 m/s | 2.9 |
| 2012 | 18.3°C | 14.1°C | 9.9°C | 22.1°C | 7.3°C | 45 mm | 71% | 3.5 m/s | 3.3 |
| 2011 | 17.5°C | 14.6°C | 11.7°C | 20.9°C | 8.0°C | 123 mm | 79% | 4.2 m/s | 2.7 |
| 2010 | 17.6°C | 14.1°C | 10.6°C | 20.2°C | 7.4°C | 86 mm | 72% | 3.6 m/s | 3 |
| 2009 | 17.1°C | 14.0°C | 10.9°C | 20.0°C | 7.3°C | 124 mm | 76% | 4 m/s | 3 |
| 2008 | 17.4°C | 14.4°C | 11.4°C | 21.0°C | 6.1°C | 205 mm | 76% | 4.3 m/s | 2.6 |
| 2007 | 18.7°C | 15.9°C | 13.0°C | 22.8°C | 9.3°C | 160 mm | 73% | 4.8 m/s | 2.6 |
| 2006 | 18.4°C | 14.6°C | 10.8°C | 22.7°C | 7.3°C | 88 mm | 71% | 3.9 m/s | 3 |
| 2005 | 17.3°C | 14.3°C | 11.2°C | 20.9°C | 6.5°C | 56 mm | 77% | 3.4 m/s | 3.2 |
| 2004 | 17.1°C | 14.0°C | 10.9°C | 19.9°C | 7.3°C | 86 mm | 75% | 3.9 m/s | 3.2 |
| 2003 | 17.0°C | 14.5°C | 12.1°C | 19.6°C | 7.4°C | 119 mm | 76% | 3.9 m/s | 2.7 |
| 2002 | 17.9°C | 15.4°C | 12.8°C | 21.5°C | 5.8°C | 108 mm | 74% | 4.3 m/s | 2.8 |
| 2001 | 18.3°C | 14.8°C | 11.2°C | 22.7°C | 7.0°C | 166 mm | 73% | 3.8 m/s | 2.8 |
| 2000 | 17.2°C | 15.0°C | 12.7°C | 19.4°C | 6.3°C | 171 mm | 77% | 4.8 m/s | 2.9 |
| 1999 | 18.2°C | 14.8°C | 11.4°C | 21.8°C | 7.9°C | 124 mm | 78% | 4.2 m/s | 2.9 |
| 1998 | 16.9°C | 13.7°C | 10.5°C | 20.3°C | 6.4°C | 111 mm | 77% | 3.9 m/s | 2.7 |
| 1997 | 17.8°C | 13.7°C | 9.6°C | 22.2°C | 6.2°C | 104 mm | 73% | 4.1 m/s | 3 |
| 1996 | 18.0°C | 15.5°C | 13.1°C | 21.4°C | 6.7°C | 168 mm | 75% | 5.6 m/s | 2.5 |
| 1995 🌧️ | 17.4°C | 14.9°C | 12.4°C | 21.2°C | 8.1°C | 206 mm | 78% | 4.6 m/s | 2.6 |
| 1994 | 17.8°C | 15.2°C | 12.7°C | 22.6°C | 8.4°C | 87 mm | 78% | 3.6 m/s | 2.9 |
| 1993 | 16.7°C | 13.9°C | 11.2°C | 20.7°C | 5.9°C | 106 mm | 77% | 4.6 m/s | 2.9 |
| 1992 | 18.0°C | 15.3°C | 12.6°C | 21.5°C | 7.7°C | 86 mm | 77% | 3.7 m/s | 2.7 |
| 1991 | 17.3°C | 14.7°C | 12.1°C | 20.6°C | 7.0°C | 153 mm | 80% | 4.3 m/s | 2.7 |
| 1990 | 16.4°C | 13.7°C | 11.0°C | 19.4°C | 6.0°C | 148 mm | 75% | 4.8 m/s | 3.1 |
| 1989 | 16.9°C | 14.3°C | 11.7°C | 19.4°C | 7.6°C | 147 mm | 75% | 3.7 m/s | 2.8 |
| 1988 | 17.5°C | 14.5°C | 11.4°C | 20.7°C | 6.1°C | 142 mm | 78% | 4.4 m/s | 2.9 |
| 1987 | 17.6°C | 14.6°C | 11.5°C | 22.4°C | 5.6°C | 155 mm | 77% | 4 m/s | 2.8 |
| 1986 ❄️ | 15.7°C | 12.8°C | 9.9°C | 17.8°C | 5.9°C | 166 mm | 78% | 4.2 m/s | 2.8 |
| 1985 | 18.4°C | 15.0°C | 11.5°C | 21.5°C | 6.7°C | 131 mm | 73% | 4 m/s | 2.9 |
| 1984 | 16.6°C | 13.8°C | 11.0°C | 19.9°C | 7.4°C | 77 mm | 77% | 4.4 m/s | 2.4 |
| 1983 | 17.4°C | 14.2°C | 11.0°C | 20.6°C | 7.1°C | 128 mm | 73% | 3.7 m/s | — |
| 1982 | 17.0°C | 13.9°C | 10.8°C | 20.9°C | 6.1°C | 118 mm | 74% | 3.8 m/s | — |
| 1981 | 16.6°C | 14.1°C | 11.6°C | 19.9°C | 9.3°C | 124 mm | 79% | 4 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 17.7°C with lows near 11.6°C (mean 14.7°C), based on 45 years of NASA POWER data.
July averages 119 mm of rainfall in Yanchep, a relatively wet time of year. The wettest on record was 206 mm in 1995.
The hottest July reached 23.6°C in 2022. The coldest dipped to 5.2°C in 2016.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.1°C. Daytime highs moved from 17.2°C to 18.3°C and overnight lows from 11.2°C to 12.4°C over the same span.
July is one of the cooler months of the year in Yanchep and a relatively wet time of year, so plan for around 17.7°C daytime highs and 11.6°C at night.
Yes — July is the coldest month of the year in Yanchep, averaging 14.7°C.
For July in Yanchep, pack light layers you can adjust through the day, with typical highs of 17.7°C and lows of 11.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 75% — quite humid.
Average wind speed in July is 4.1 m/s. The windiest July on record averaged 5.6 m/s (1996).
The wettest July on record was 1995 with 206 mm. On average, July sees 119 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 Yanchep 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.
