July is one of the cooler months of the year in Colac, with average highs near 12°C and lows around 7.3°C (mean 9.7°C). It is a relatively wet time of year, averaging 80 mm of rainfall and 85% relative humidity across the period.
July is one of the cooler months of the year in Colac. Across 45 years of records, the warmest July in Colac was 2023 — when the month averaged 11°C — while the coldest was 1995 at 8.3°C. Typical July days reach 12°C with nights near 7.3°C. The long-term trend is warming, about 0.3°C per decade.
July is a relatively wet time of year in Colac, averaging 80 mm of rainfall. The wettest July on record was 1996 with 138 mm, while the driest was 2023 at 26 mm.
Relative humidity in Colac during July averages 85%. The most humid July was 1986 at 90%, and the least humid was 2018 at 78%.
July receives about 1.9 kWh/m²/day of solar energy in Colac. The sunniest July was 1985 at 2.2 kWh/m²/day, and the cloudiest was 1984 at 1.4.
Average wind speed in Colac during July is 2.6 m/s. The windiest July was 2018 at 3.2 m/s, while the calmest was 2020 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.0°C | 9.4°C | 9.9°C | 9.9°C | 10.1°C | +1.1°C |
| Avg High | 11.3°C | 11.7°C | 12.2°C | 12.3°C | 12.5°C | +1.2°C |
| Avg Low | 6.8°C | 7.1°C | 7.6°C | 7.6°C | 7.7°C | +0.9°C |
| Avg Rain | 90 mm | 86 mm | 88 mm | 77 mm | 46 mm | -44 mm |
July temperatures in Colac have risen by about 1.4°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 1.9°C (1982) to a record high of 17°C (2017).
Rainfall in July is a relatively wet time of year, averaging 80 mm, with a wettest year of 138 mm.
A quieter season to visit Colac
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Colac. That said, July — with days averaging 12°C and nights around 7.3°C (mean 9.7°C) and moderate rainfall (80 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 | 12.7°C | 10.3°C | 7.8°C | 15.4°C | 6.1°C | 51 mm | 80% | 2.7 m/s | 1.9 |
| 2024 | 12.6°C | 10.2°C | 7.8°C | 16.2°C | 4.9°C | 53 mm | 82% | 2.5 m/s | 2 |
| 2023 🔥 | 13.4°C | 11.0°C | 8.6°C | 16.0°C | 6.0°C | 26 mm | 81% | 2.7 m/s | 2 |
| 2022 | 12.4°C | 10.0°C | 7.7°C | 16.2°C | 3.4°C | 44 mm | 82% | 2.4 m/s | 2 |
| 2021 | 12.0°C | 9.6°C | 7.2°C | 15.6°C | 4.2°C | 74 mm | 86% | 2.9 m/s | 1.9 |
| 2020 | 12.2°C | 9.8°C | 7.3°C | 15.5°C | 4.3°C | 28 mm | 85% | 2.1 m/s | 2 |
| 2019 | 12.7°C | 10.4°C | 8.2°C | 15.7°C | 6.7°C | 49 mm | 82% | 2.9 m/s | 1.9 |
| 2018 | 12.6°C | 10.1°C | 7.6°C | 16.6°C | 3.9°C | 59 mm | 78% | 3.2 m/s | 1.9 |
| 2017 | 12.4°C | 9.5°C | 6.6°C | 17.0°C | 2.2°C | 51 mm | 82% | 2.8 m/s | 2.1 |
| 2016 | 12.2°C | 10.2°C | 8.2°C | 16.2°C | 4.6°C | 91 mm | 85% | 3 m/s | 1.7 |
| 2015 | 11.4°C | 9.0°C | 6.5°C | 14.6°C | 2.3°C | 53 mm | 81% | 2.8 m/s | 1.8 |
| 2014 | 12.2°C | 10.0°C | 7.9°C | 14.8°C | 5.2°C | 107 mm | 87% | 2.9 m/s | 1.8 |
| 2013 | 12.7°C | 10.5°C | 8.2°C | 16.6°C | 4.2°C | 107 mm | 86% | 2.6 m/s | 1.8 |
| 2012 | 12.0°C | 9.9°C | 7.7°C | 14.1°C | 3.5°C | 92 mm | 88% | 2.3 m/s | 1.8 |
| 2011 | 12.0°C | 9.8°C | 7.7°C | 15.7°C | 4.5°C | 99 mm | 85% | 3 m/s | 1.9 |
| 2010 | 12.3°C | 10.0°C | 7.7°C | 15.5°C | 4.6°C | 63 mm | 87% | 2.2 m/s | 1.9 |
| 2009 | 12.1°C | 9.9°C | 7.7°C | 15.1°C | 3.9°C | 103 mm | 85% | 2.9 m/s | 1.8 |
| 2008 | 12.2°C | 9.6°C | 7.0°C | 15.3°C | 5.2°C | 81 mm | 82% | 2.6 m/s | 2.1 |
| 2007 | 11.4°C | 9.2°C | 7.1°C | 15.6°C | 4.0°C | 130 mm | 86% | 2.6 m/s | 2.1 |
| 2006 | 12.0°C | 9.8°C | 7.5°C | 14.4°C | 4.9°C | 78 mm | 85% | 2.6 m/s | 1.8 |
| 2005 | 12.8°C | 10.5°C | 8.2°C | 16.1°C | 4.2°C | 70 mm | 84% | 2.5 m/s | 1.8 |
| 2004 | 11.4°C | 9.3°C | 7.1°C | 14.2°C | 5.8°C | 98 mm | 85% | 2.8 m/s | 1.9 |
| 2003 | 12.7°C | 10.0°C | 7.3°C | 15.9°C | 5.3°C | 101 mm | 82% | 2.8 m/s | 2 |
| 2002 | 12.7°C | 10.0°C | 7.4°C | 15.4°C | 4.3°C | 86 mm | 81% | 2.9 m/s | 1.9 |
| 2001 | 12.6°C | 10.6°C | 8.6°C | 14.1°C | 5.2°C | 55 mm | 87% | 2.2 m/s | 1.8 |
| 2000 | 12.1°C | 9.9°C | 7.6°C | 15.8°C | 4.9°C | 76 mm | 84% | 2.6 m/s | 1.9 |
| 1999 | 13.3°C | 10.7°C | 8.1°C | 16.5°C | 4.5°C | 39 mm | 81% | 2.6 m/s | 1.8 |
| 1998 | 11.5°C | 9.0°C | 6.6°C | 14.0°C | 3.7°C | 79 mm | 85% | 2.4 m/s | 1.9 |
| 1997 | 11.6°C | 9.0°C | 6.5°C | 15.3°C | 4.5°C | 48 mm | 82% | 2.4 m/s | 1.9 |
| 1996 🌧️ | 11.3°C | 9.0°C | 6.7°C | 14.6°C | 2.1°C | 138 mm | 88% | 2.5 m/s | 1.7 |
| 1995 ❄️ | 10.2°C | 8.3°C | 6.4°C | 12.2°C | 3.6°C | 118 mm | 90% | 2.7 m/s | 1.8 |
| 1994 | 12.4°C | 9.7°C | 7.0°C | 16.7°C | 2.4°C | 63 mm | 83% | 2.6 m/s | 2.1 |
| 1993 | 12.5°C | 10.0°C | 7.5°C | 15.7°C | 5.6°C | 97 mm | 83% | 2.6 m/s | 1.9 |
| 1992 | 11.5°C | 9.3°C | 7.2°C | 14.1°C | 4.6°C | 81 mm | 85% | 2.8 m/s | 2.1 |
| 1991 | 11.6°C | 9.6°C | 7.5°C | 14.0°C | 5.1°C | 80 mm | 87% | 2.5 m/s | 2 |
| 1990 | 11.5°C | 9.4°C | 7.3°C | 15.2°C | 4.1°C | 119 mm | 89% | 2.9 m/s | 2 |
| 1989 | 10.9°C | 8.9°C | 6.8°C | 14.0°C | 3.8°C | 89 mm | 87% | 2.5 m/s | 2 |
| 1988 | 12.7°C | 10.5°C | 8.3°C | 14.4°C | 6.3°C | 89 mm | 87% | 2.7 m/s | 1.8 |
| 1987 | 11.9°C | 9.2°C | 6.6°C | 14.5°C | 4.8°C | 74 mm | 85% | 2.6 m/s | 2 |
| 1986 | 10.4°C | 8.5°C | 6.5°C | 13.5°C | 3.0°C | 123 mm | 90% | 2.7 m/s | 1.9 |
| 1985 | 11.3°C | 8.9°C | 6.6°C | 16.3°C | 3.2°C | 94 mm | 83% | 2.7 m/s | 2.2 |
| 1984 | 10.9°C | 8.9°C | 6.8°C | 13.7°C | 3.5°C | 109 mm | 87% | 2.5 m/s | 1.4 |
| 1983 | 11.0°C | 8.7°C | 6.5°C | 13.2°C | 3.5°C | 79 mm | 87% | 2.3 m/s | — |
| 1982 | 11.5°C | 8.7°C | 6.0°C | 14.4°C | 1.9°C | 43 mm | 81% | 2.2 m/s | — |
| 1981 | 11.4°C | 9.0°C | 6.7°C | 14.5°C | 4.2°C | 110 mm | 87% | 2.9 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 12°C with lows near 7.3°C (mean 9.7°C), based on 45 years of NASA POWER data.
July averages 80 mm of rainfall in Colac, a relatively wet time of year. The wettest on record was 138 mm in 1996.
The hottest July reached 17°C in 2017. The coldest dipped to 1.9°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.4°C. Daytime highs moved from 11.2°C to 12.6°C and overnight lows from 6.5°C to 7.8°C over the same span.
July is one of the cooler months of the year in Colac and a relatively wet time of year, so plan for around 12°C daytime highs and 7.3°C at night.
Yes — July is the coldest month of the year in Colac, averaging 9.7°C.
For July in Colac, pack warm layers and a jacket for chilly mornings, with typical highs of 12°C and lows of 7.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 85% — quite humid.
Average wind speed in July is 2.6 m/s. The windiest July on record averaged 3.2 m/s (2018).
The wettest July on record was 1996 with 138 mm. On average, July sees 80 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 Colac 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.
