July is one of the cooler months of the year in Adelaide, with average highs near 13.8°C and lows around 6.3°C (mean 10.1°C). It is a relatively wet time of year, averaging 66 mm of rainfall and 80% relative humidity across the period.
July is one of the cooler months of the year in Adelaide. Across 45 years of records, the warmest July in Adelaide was 2019 — when the month averaged 11.4°C — while the coldest was 1982 at 8.5°C. Typical July days reach 13.8°C with nights near 6.3°C. The long-term trend is warming, about 0.3°C per decade.
July is a relatively wet time of year in Adelaide, averaging 66 mm of rainfall. The wettest July on record was 1995 with 128 mm, while the driest was 2020 at 17 mm.
Relative humidity in Adelaide during July averages 80%. The most humid July was 2012 at 84%, and the least humid was 2018 at 70%.
July receives about 2.6 kWh/m²/day of solar energy in Adelaide. The sunniest Julys were 1994 and 2020 at 2.9 kWh/m²/day, and the cloudiest was 1984 at 1.8.
Average wind speed in Adelaide during July is 2.5 m/s. The windiest Julys were 1995, 2018 and 2021, among others at 3 m/s, while the calmest were 2001 and 2020 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.4°C | 10.0°C | 10.2°C | 10.5°C | 10.3°C | +0.9°C |
| Avg High | 13.0°C | 13.7°C | 14.0°C | 14.2°C | 14.2°C | +1.2°C |
| Avg Low | 5.7°C | 6.3°C | 6.3°C | 6.6°C | 6.4°C | +0.7°C |
| Avg Rain | 76 mm | 71 mm | 65 mm | 60 mm | 50 mm | -26 mm |
July temperatures in Adelaide have risen by about 1.1°C between 1981–1985 and 2021–2025.
July has ranged from a record low of -0.7°C (1982) to a record high of 21.6°C (1985).
Rainfall in July is a relatively wet time of year, averaging 66 mm, with a wettest year of 128 mm.
A quieter season to visit Adelaide
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Adelaide. That said, July — with days averaging 13.8°C and nights around 6.3°C (mean 10.1°C) and moderate rainfall (66 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 | 13.7°C | 10.2°C | 6.6°C | 17.0°C | 4.5°C | 86 mm | 77% | 2.7 m/s | 2.5 |
| 2024 | 14.6°C | 10.5°C | 6.4°C | 19.8°C | 0.7°C | 46 mm | 76% | 2.6 m/s | 2.8 |
| 2023 | 14.7°C | 10.7°C | 6.7°C | 18.4°C | 1.8°C | 30 mm | 81% | 2.4 m/s | 2.6 |
| 2022 | 13.9°C | 10.0°C | 6.0°C | 20.0°C | 1.3°C | 31 mm | 80% | 2.2 m/s | 2.5 |
| 2021 | 13.8°C | 10.2°C | 6.7°C | 18.8°C | 2.8°C | 92 mm | 79% | 3 m/s | 2.5 |
| 2020 | 14.4°C | 10.0°C | 5.7°C | 17.9°C | 2.5°C | 17 mm | 82% | 1.8 m/s | 2.9 |
| 2019 🔥 | 15.5°C | 11.4°C | 7.2°C | 20.9°C | 4.1°C | 27 mm | 79% | 2.6 m/s | 2.7 |
| 2018 | 15.0°C | 11.1°C | 7.2°C | 19.9°C | 2.6°C | 28 mm | 70% | 3 m/s | 2.7 |
| 2017 | 15.0°C | 11.1°C | 7.1°C | 21.4°C | 3.4°C | 57 mm | 74% | 2.8 m/s | 2.6 |
| 2016 | 14.0°C | 10.4°C | 6.8°C | 21.3°C | 1.5°C | 80 mm | 81% | 2.9 m/s | 2.4 |
| 2015 | 13.2°C | 9.4°C | 5.5°C | 16.5°C | -0.3°C | 34 mm | 79% | 2.6 m/s | 2.6 |
| 2014 | 13.6°C | 10.2°C | 6.7°C | 16.7°C | 2.7°C | 89 mm | 83% | 2.9 m/s | 2.4 |
| 2013 | 14.3°C | 10.8°C | 7.3°C | 18.2°C | 3.1°C | 104 mm | 83% | 2.6 m/s | 2.5 |
| 2012 | 13.4°C | 9.8°C | 6.1°C | 16.8°C | 1.6°C | 58 mm | 84% | 2.1 m/s | 2.6 |
| 2011 | 14.1°C | 10.3°C | 6.4°C | 19.4°C | 1.8°C | 59 mm | 80% | 2.4 m/s | 2.6 |
| 2010 | 14.2°C | 10.1°C | 6.1°C | 16.2°C | 1.9°C | 63 mm | 82% | 2 m/s | 2.6 |
| 2009 | 14.1°C | 10.7°C | 7.2°C | 17.3°C | 2.1°C | 83 mm | 82% | 2.8 m/s | 2.6 |
| 2008 | 13.3°C | 9.8°C | 6.2°C | 17.4°C | 0.4°C | 73 mm | 79% | 2.7 m/s | 2.5 |
| 2007 | 13.7°C | 10.1°C | 6.4°C | 18.2°C | 1.9°C | 69 mm | 80% | 2.6 m/s | 2.7 |
| 2006 | 13.4°C | 9.4°C | 5.3°C | 17.9°C | 0.2°C | 54 mm | 81% | 2.5 m/s | 2.5 |
| 2005 | 14.1°C | 10.3°C | 6.4°C | 18.3°C | 2.3°C | 48 mm | 83% | 2.2 m/s | 2.6 |
| 2004 | 13.3°C | 9.9°C | 6.4°C | 18.2°C | 3.7°C | 77 mm | 83% | 2.5 m/s | 2.4 |
| 2003 | 14.1°C | 10.0°C | 5.9°C | 17.3°C | 2.2°C | 56 mm | 79% | 2.5 m/s | 2.8 |
| 2002 | 15.1°C | 10.8°C | 6.5°C | 21.3°C | 2.5°C | 67 mm | 76% | 2.8 m/s | 2.6 |
| 2001 | 14.5°C | 10.4°C | 6.3°C | 18.6°C | 3.7°C | 54 mm | 82% | 1.8 m/s | 2.5 |
| 2000 | 14.0°C | 10.2°C | 6.4°C | 18.4°C | 3.1°C | 74 mm | 81% | 2.7 m/s | 2.6 |
| 1999 | 15.0°C | 10.9°C | 6.8°C | 18.6°C | 3.2°C | 47 mm | 78% | 2.1 m/s | 2.6 |
| 1998 | 13.0°C | 9.3°C | 5.5°C | 15.8°C | 1.7°C | 66 mm | 79% | 2.2 m/s | 2.4 |
| 1997 | 13.5°C | 9.1°C | 4.8°C | 17.2°C | 1.8°C | 25 mm | 77% | 1.9 m/s | 2.7 |
| 1996 | 13.7°C | 10.3°C | 6.9°C | 18.8°C | 3.4°C | 105 mm | 84% | 2.7 m/s | 2.4 |
| 1995 🌧️ | 12.7°C | 9.7°C | 6.7°C | 14.7°C | 2.4°C | 128 mm | 83% | 3 m/s | 2.3 |
| 1994 | 14.7°C | 10.2°C | 5.7°C | 19.8°C | 2.6°C | 43 mm | 75% | 2.2 m/s | 2.9 |
| 1993 | 13.9°C | 10.2°C | 6.5°C | 19.6°C | 2.8°C | 75 mm | 79% | 2.4 m/s | 2.6 |
| 1992 | 14.1°C | 10.4°C | 6.8°C | 18.9°C | 3.4°C | 54 mm | 81% | 2.7 m/s | 2.8 |
| 1991 | 13.4°C | 10.0°C | 6.5°C | 17.3°C | 2.7°C | 67 mm | 84% | 2.2 m/s | 2.5 |
| 1990 | 13.2°C | 10.1°C | 6.9°C | 18.7°C | 4.5°C | 99 mm | 84% | 2.8 m/s | 2.6 |
| 1989 | 12.2°C | 9.0°C | 5.8°C | 16.5°C | 1.3°C | 90 mm | 84% | 2.6 m/s | 2.7 |
| 1988 | 14.2°C | 10.5°C | 6.8°C | 17.3°C | 3.1°C | 66 mm | 82% | 2.8 m/s | 2.5 |
| 1987 | 13.2°C | 9.4°C | 5.5°C | 17.4°C | 1.2°C | 83 mm | 82% | 2.4 m/s | 2.7 |
| 1986 | 12.3°C | 9.2°C | 6.0°C | 16.0°C | 0.1°C | 115 mm | 82% | 2.5 m/s | 2.6 |
| 1985 | 13.8°C | 9.9°C | 6.0°C | 21.6°C | -0.5°C | 46 mm | 77% | 2.5 m/s | 2.7 |
| 1984 | 12.2°C | 9.0°C | 5.7°C | 15.2°C | 1.4°C | 83 mm | 83% | 2.5 m/s | 1.8 |
| 1983 | 12.5°C | 9.0°C | 5.4°C | 15.4°C | 0.1°C | 90 mm | 83% | 2.5 m/s | — |
| 1982 ❄️ | 13.0°C | 8.5°C | 4.1°C | 17.1°C | -0.7°C | 24 mm | 77% | 2 m/s | — |
| 1981 | 13.6°C | 9.8°C | 6.1°C | 18.3°C | 2.7°C | 88 mm | 80% | 3 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 13.8°C with lows near 6.3°C (mean 10.1°C), based on 45 years of NASA POWER data.
July averages 66 mm of rainfall in Adelaide, a relatively wet time of year. The wettest on record was 128 mm in 1995.
The hottest July reached 21.6°C in 1985. The coldest dipped to -0.7°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.1°C. Daytime highs moved from 13°C to 14.1°C and overnight lows from 5.5°C to 6.5°C over the same span.
July is one of the cooler months of the year in Adelaide and a relatively wet time of year, so plan for around 13.8°C daytime highs and 6.3°C at night.
Yes — July is the coldest month of the year in Adelaide, averaging 10.1°C.
For July in Adelaide, pack warm layers and a jacket for chilly mornings, with typical highs of 13.8°C and lows of 6.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 80% — quite humid.
Average wind speed in July is 2.5 m/s. The windiest July on record averaged 3 m/s (1981).
The wettest July on record was 1995 with 128 mm. On average, July sees 66 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 Adelaide 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.
