July is one of the cooler months of the year in Wonthaggi, with average highs near 12.4°C and lows around 7.9°C (mean 10.2°C). It is a relatively wet time of year, averaging 88 mm of rainfall and 83% relative humidity across the period.
July is one of the cooler months of the year in Wonthaggi. Across 45 years of records, the warmest July in Wonthaggi was 2023 — when the month averaged 11.7°C — while the coldest was 1982 at 8.4°C. Typical July days reach 12.4°C with nights near 7.9°C. The long-term trend is warming, about 0.4°C per decade.
July is a relatively wet time of year in Wonthaggi, averaging 88 mm of rainfall. The wettest July on record was 1991 with 151 mm, while the driest was 2023 at 30 mm.
Relative humidity in Wonthaggi during July averages 83%. The most humid July was 1995 at 90%, and the least humid was 2018 at 74%.
July receives about 2 kWh/m²/day of solar energy in Wonthaggi. The sunniest Julys were 1985 and 1994 at 2.2 kWh/m²/day, and the cloudiest was 1984 at 1.5.
Average wind speed in Wonthaggi during July is 1.8 m/s. The windiest Julys were 2016 and 2018 at 2.2 m/s, while the calmest were 1982 and 2020 at 1.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.3°C | 9.8°C | 10.6°C | 10.6°C | 10.6°C | +1.3°C |
| Avg High | 11.5°C | 12.0°C | 12.8°C | 12.8°C | 12.9°C | +1.4°C |
| Avg Low | 7.0°C | 7.7°C | 8.3°C | 8.4°C | 8.4°C | +1.4°C |
| Avg Rain | 103 mm | 96 mm | 89 mm | 78 mm | 69 mm | -34 mm |
July temperatures in Wonthaggi have risen by about 1.7°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 2.5°C (1996) to a record high of 18°C (2013).
Rainfall in July is a relatively wet time of year, averaging 88 mm, with a wettest year of 151 mm.
A quieter season to visit Wonthaggi
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Wonthaggi. That said, July — with days averaging 12.4°C and nights around 7.9°C (mean 10.2°C) and higher rainfall (88 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 | 13.0°C | 10.7°C | 8.4°C | 16.0°C | 5.6°C | 90 mm | 81% | 1.8 m/s | 2 |
| 2024 | 12.8°C | 10.4°C | 8.0°C | 16.0°C | 3.1°C | 96 mm | 80% | 1.7 m/s | 1.8 |
| 2023 🔥 | 13.9°C | 11.7°C | 9.6°C | 16.2°C | 6.3°C | 30 mm | 78% | 2 m/s | 2 |
| 2022 | 12.7°C | 10.3°C | 7.9°C | 16.5°C | 4.4°C | 53 mm | 82% | 1.6 m/s | 2.1 |
| 2021 | 12.5°C | 10.3°C | 8.1°C | 16.1°C | 5.1°C | 96 mm | 83% | 2 m/s | 1.9 |
| 2020 | 12.4°C | 10.3°C | 8.2°C | 15.7°C | 3.4°C | 48 mm | 86% | 1.5 m/s | 2.1 |
| 2019 | 13.3°C | 11.1°C | 8.9°C | 16.9°C | 6.3°C | 81 mm | 78% | 2.1 m/s | 2 |
| 2018 | 13.4°C | 11.1°C | 8.7°C | 17.0°C | 5.4°C | 78 mm | 74% | 2.2 m/s | 2 |
| 2017 | 12.9°C | 10.3°C | 7.6°C | 16.5°C | 2.7°C | 58 mm | 77% | 2 m/s | 2.1 |
| 2016 | 13.2°C | 11.1°C | 9.0°C | 16.9°C | 5.5°C | 78 mm | 82% | 2.2 m/s | 1.8 |
| 2015 | 12.2°C | 9.7°C | 7.3°C | 14.7°C | 2.8°C | 62 mm | 79% | 2 m/s | 2 |
| 2014 | 12.8°C | 10.9°C | 8.9°C | 16.0°C | 5.0°C | 110 mm | 84% | 2 m/s | 1.9 |
| 2013 | 13.1°C | 11.0°C | 8.9°C | 18.0°C | 4.0°C | 92 mm | 84% | 1.9 m/s | 2 |
| 2012 | 12.2°C | 10.1°C | 8.0°C | 14.7°C | 3.5°C | 64 mm | 87% | 1.6 m/s | 2 |
| 2011 | 12.1°C | 10.1°C | 8.1°C | 15.8°C | 3.1°C | 95 mm | 84% | 2 m/s | 1.9 |
| 2010 | 12.8°C | 10.5°C | 8.2°C | 15.5°C | 5.9°C | 61 mm | 86% | 1.6 m/s | 2 |
| 2009 | 13.1°C | 10.9°C | 8.7°C | 16.5°C | 3.3°C | 96 mm | 79% | 2 m/s | 2 |
| 2008 | 12.6°C | 10.1°C | 7.5°C | 16.4°C | 4.1°C | 93 mm | 81% | 1.8 m/s | 2.1 |
| 2007 | 11.8°C | 9.8°C | 7.8°C | 15.7°C | 4.2°C | 121 mm | 85% | 1.8 m/s | 2.1 |
| 2006 | 12.9°C | 10.5°C | 8.2°C | 14.7°C | 5.3°C | 61 mm | 83% | 1.7 m/s | 2 |
| 2005 | 13.4°C | 11.3°C | 9.3°C | 16.6°C | 6.1°C | 75 mm | 82% | 1.8 m/s | 1.9 |
| 2004 | 12.0°C | 9.9°C | 7.8°C | 14.6°C | 5.9°C | 88 mm | 82% | 2 m/s | 2 |
| 2003 | 13.0°C | 10.6°C | 8.1°C | 15.7°C | 5.1°C | 125 mm | 80% | 1.9 m/s | 2 |
| 2002 | 13.2°C | 10.7°C | 8.3°C | 15.8°C | 3.9°C | 94 mm | 77% | 2.1 m/s | 2 |
| 2001 | 13.4°C | 11.2°C | 9.0°C | 15.1°C | 5.2°C | 54 mm | 87% | 1.6 m/s | 1.9 |
| 2000 | 12.7°C | 10.5°C | 8.3°C | 15.7°C | 5.5°C | 80 mm | 83% | 1.8 m/s | 2 |
| 1999 | 13.3°C | 11.0°C | 8.6°C | 15.8°C | 3.1°C | 51 mm | 81% | 1.8 m/s | 2 |
| 1998 | 11.9°C | 9.6°C | 7.4°C | 15.3°C | 4.9°C | 74 mm | 84% | 1.7 m/s | 1.9 |
| 1997 | 11.9°C | 9.5°C | 7.2°C | 16.7°C | 3.5°C | 60 mm | 81% | 1.7 m/s | 2 |
| 1996 | 11.2°C | 9.1°C | 7.0°C | 14.3°C | 2.5°C | 148 mm | 89% | 1.6 m/s | 1.8 |
| 1995 | 10.2°C | 8.6°C | 7.0°C | 13.0°C | 4.5°C | 136 mm | 90% | 1.9 m/s | 1.7 |
| 1994 | 13.0°C | 10.5°C | 7.9°C | 17.2°C | 3.1°C | 52 mm | 79% | 1.8 m/s | 2.2 |
| 1993 | 12.9°C | 10.4°C | 8.0°C | 16.0°C | 5.2°C | 91 mm | 84% | 1.7 m/s | 2 |
| 1992 | 11.9°C | 9.9°C | 7.9°C | 14.6°C | 4.6°C | 68 mm | 83% | 2 m/s | 2.1 |
| 1991 🌧️ | 11.6°C | 9.9°C | 8.2°C | 15.3°C | 4.9°C | 151 mm | 89% | 1.8 m/s | 1.9 |
| 1990 | 12.2°C | 10.0°C | 7.9°C | 16.0°C | 5.4°C | 134 mm | 87% | 2 m/s | 2 |
| 1989 | 11.3°C | 9.2°C | 7.0°C | 15.0°C | 3.5°C | 112 mm | 88% | 1.7 m/s | 2.1 |
| 1988 | 12.9°C | 10.8°C | 8.7°C | 15.2°C | 6.4°C | 90 mm | 86% | 1.9 m/s | 2 |
| 1987 | 11.7°C | 9.3°C | 6.8°C | 14.6°C | 3.7°C | 98 mm | 87% | 1.8 m/s | 2 |
| 1986 | 10.9°C | 9.1°C | 7.3°C | 14.7°C | 3.8°C | 143 mm | 90% | 1.9 m/s | 1.9 |
| 1985 | 11.4°C | 9.1°C | 6.8°C | 15.9°C | 2.8°C | 114 mm | 84% | 1.8 m/s | 2.2 |
| 1984 | 11.2°C | 9.0°C | 6.8°C | 13.8°C | 3.7°C | 124 mm | 87% | 1.7 m/s | 1.5 |
| 1983 | 11.4°C | 9.1°C | 6.7°C | 14.1°C | 2.7°C | 68 mm | 87% | 1.6 m/s | — |
| 1982 ❄️ | 11.0°C | 8.4°C | 5.8°C | 14.0°C | 2.7°C | 53 mm | 83% | 1.5 m/s | — |
| 1981 | 11.3°C | 9.4°C | 7.4°C | 14.3°C | 4.3°C | 127 mm | 86% | 2 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 12.4°C with lows near 7.9°C (mean 10.2°C), based on 45 years of NASA POWER data.
July averages 88 mm of rainfall in Wonthaggi, a relatively wet time of year. The wettest on record was 151 mm in 1991.
The hottest July reached 18°C in 2013. The coldest dipped to 2.5°C in 1996.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.7°C. Daytime highs moved from 11.3°C to 13°C and overnight lows from 6.7°C to 8.4°C over the same span.
July is one of the cooler months of the year in Wonthaggi and a relatively wet time of year, so plan for around 12.4°C daytime highs and 7.9°C at night.
Yes — July is the coldest month of the year in Wonthaggi, averaging 10.2°C.
For July in Wonthaggi, pack warm layers and a jacket for chilly mornings, with typical highs of 12.4°C and lows of 7.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 83% — quite humid.
Average wind speed in July is 1.8 m/s. The windiest July on record averaged 2.2 m/s (2016).
The wettest July on record was 1991 with 151 mm. On average, July sees 88 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 Wonthaggi 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.
