July is one of the cooler months of the year in Whyalla, with average highs near 15.9°C and lows around 7.7°C (mean 11.8°C). It is about average for rainfall, averaging 29 mm of rainfall and 73% relative humidity across the period.
July is one of the cooler months of the year in Whyalla. Across 45 years of records, the warmest July in Whyalla was 2019 — when the month averaged 13°C — while the coldest was 1982 at 10.6°C. Typical July days reach 15.9°C with nights near 7.7°C. The long-term July temperature trend is broadly flat.
July is about average for rainfall in Whyalla, averaging 29 mm of rainfall. The wettest July on record was 1996 with 64 mm, while the driest was 2022 at 5 mm.
Relative humidity in Whyalla during July averages 73%. The most humid July was 2013 at 79%, and the least humid was 2018 at 65%.
July receives about 2.8 kWh/m²/day of solar energy in Whyalla. The sunniest July was 1994 at 3.2 kWh/m²/day, and the cloudiest was 1984 at 2.1.
Average wind speed in Whyalla during July is 3.8 m/s. The windiest July was 1995 at 4.6 m/s, while the calmest were 2001 and 2020 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.4°C | 11.9°C | 11.9°C | 12.0°C | 11.9°C | +0.5°C |
| Avg High | 15.4°C | 15.9°C | 16.1°C | 16.2°C | 16.1°C | +0.7°C |
| Avg Low | 7.5°C | 7.9°C | 7.8°C | 7.8°C | 7.7°C | +0.2°C |
| Avg Rain | 36 mm | 32 mm | 29 mm | 26 mm | 21 mm | -15 mm |
July temperatures in Whyalla have risen by about 0.8°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 2.4°C (1982) to a record high of 24.5°C (2017).
Rainfall in July is about average for rainfall, averaging 29 mm, with a wettest year of 64 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0°C per decade, widening the gap between day and night.
A quieter season to visit Whyalla
If your dates are flexible, the more temperate months of March and December tend to be the most comfortable for visiting Whyalla. That said, July — with days averaging 15.9°C and nights around 7.7°C (mean 11.8°C) and low rainfall (29 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 | 15.7°C | 11.8°C | 7.9°C | 19.2°C | 6.0°C | 34 mm | 71% | 4.2 m/s | 2.7 |
| 2024 | 16.1°C | 12.1°C | 8.0°C | 20.9°C | 3.8°C | 22 mm | 71% | 3.8 m/s | 3 |
| 2023 | 16.8°C | 12.4°C | 7.9°C | 21.1°C | 4.4°C | 7 mm | 72% | 3.5 m/s | 2.9 |
| 2022 | 15.7°C | 11.5°C | 7.3°C | 21.3°C | 4.0°C | 5 mm | 73% | 3.4 m/s | 2.7 |
| 2021 | 16.3°C | 12.1°C | 7.8°C | 22.0°C | 5.9°C | 44 mm | 72% | 4.3 m/s | 2.9 |
| 2020 | 16.2°C | 11.7°C | 7.1°C | 21.1°C | 4.2°C | 13 mm | 74% | 2.9 m/s | 3 |
| 2019 🔥 | 17.3°C | 13.0°C | 8.6°C | 21.2°C | 5.8°C | 8 mm | 72% | 3.4 m/s | 2.9 |
| 2018 | 17.0°C | 12.4°C | 7.8°C | 20.7°C | 4.7°C | 12 mm | 65% | 4 m/s | 2.9 |
| 2017 | 17.4°C | 12.8°C | 8.2°C | 24.5°C | 6.2°C | 15 mm | 67% | 4.1 m/s | 2.8 |
| 2016 | 16.2°C | 12.1°C | 8.0°C | 22.9°C | 3.6°C | 35 mm | 71% | 3.9 m/s | 2.7 |
| 2015 | 15.0°C | 11.0°C | 6.9°C | 18.5°C | 2.4°C | 16 mm | 75% | 3.7 m/s | 2.8 |
| 2014 | 15.7°C | 11.6°C | 7.4°C | 19.1°C | 4.3°C | 27 mm | 76% | 4.1 m/s | 2.8 |
| 2013 | 16.1°C | 12.2°C | 8.3°C | 20.1°C | 5.8°C | 57 mm | 79% | 3.7 m/s | 2.8 |
| 2012 | 15.2°C | 11.1°C | 7.0°C | 18.3°C | 3.8°C | 35 mm | 77% | 3 m/s | 2.9 |
| 2011 | 16.1°C | 12.1°C | 8.2°C | 21.0°C | 4.3°C | 28 mm | 74% | 3.3 m/s | 2.8 |
| 2010 | 15.5°C | 11.3°C | 7.2°C | 18.1°C | 4.7°C | 23 mm | 75% | 3.1 m/s | 3 |
| 2009 | 16.5°C | 12.5°C | 8.5°C | 20.9°C | 4.9°C | 39 mm | 74% | 4.1 m/s | 2.8 |
| 2008 | 15.6°C | 11.5°C | 7.4°C | 20.4°C | 3.0°C | 29 mm | 72% | 4.3 m/s | 2.8 |
| 2007 | 16.0°C | 11.9°C | 7.9°C | 21.1°C | 4.0°C | 20 mm | 72% | 3.7 m/s | 2.9 |
| 2006 | 15.4°C | 11.3°C | 7.2°C | 20.5°C | 4.4°C | 40 mm | 74% | 3.8 m/s | 2.6 |
| 2005 | 16.4°C | 12.2°C | 8.0°C | 20.5°C | 3.9°C | 29 mm | 75% | 3.2 m/s | 2.7 |
| 2004 | 15.5°C | 11.5°C | 7.6°C | 20.5°C | 4.7°C | 32 mm | 75% | 3.5 m/s | 2.6 |
| 2003 | 16.6°C | 12.0°C | 7.3°C | 20.9°C | 5.0°C | 15 mm | 70% | 3.9 m/s | 3.1 |
| 2002 | 17.2°C | 12.3°C | 7.5°C | 22.6°C | 4.1°C | 26 mm | 69% | 4.2 m/s | 2.8 |
| 2001 | 15.8°C | 12.0°C | 8.1°C | 21.0°C | 6.3°C | 29 mm | 77% | 2.9 m/s | 2.7 |
| 2000 | 16.3°C | 12.2°C | 8.1°C | 21.6°C | 5.9°C | 29 mm | 70% | 3.9 m/s | 2.9 |
| 1999 | 16.7°C | 12.4°C | 8.1°C | 20.5°C | 4.8°C | 13 mm | 72% | 3.4 m/s | 2.8 |
| 1998 | 14.6°C | 10.9°C | 7.3°C | 17.8°C | 5.3°C | 41 mm | 75% | 3.7 m/s | 2.7 |
| 1997 | 15.0°C | 10.7°C | 6.3°C | 18.3°C | 4.0°C | 6 mm | 71% | 3 m/s | 3 |
| 1996 🌧️ | 15.9°C | 12.1°C | 8.3°C | 21.6°C | 6.2°C | 64 mm | 77% | 4.4 m/s | 2.7 |
| 1995 | 15.2°C | 11.6°C | 8.0°C | 18.5°C | 3.9°C | 49 mm | 74% | 4.6 m/s | 2.6 |
| 1994 | 17.1°C | 12.3°C | 7.5°C | 21.2°C | 4.7°C | 24 mm | 67% | 3.3 m/s | 3.2 |
| 1993 | 16.0°C | 12.2°C | 8.4°C | 20.9°C | 5.7°C | 38 mm | 71% | 3.9 m/s | 2.8 |
| 1992 | 16.8°C | 12.5°C | 8.2°C | 21.8°C | 6.2°C | 12 mm | 71% | 3.7 m/s | 3 |
| 1991 | 16.1°C | 12.1°C | 8.2°C | 19.7°C | 6.1°C | 30 mm | 74% | 3.6 m/s | 2.8 |
| 1990 | 15.7°C | 12.0°C | 8.4°C | 20.3°C | 6.1°C | 39 mm | 74% | 4.2 m/s | 2.8 |
| 1989 | 14.2°C | 10.9°C | 7.6°C | 17.9°C | 4.9°C | 59 mm | 77% | 4.1 m/s | 2.9 |
| 1988 | 16.7°C | 12.7°C | 8.6°C | 20.5°C | 5.3°C | 17 mm | 73% | 4 m/s | 3 |
| 1987 | 15.8°C | 11.7°C | 7.7°C | 19.5°C | 4.5°C | 35 mm | 72% | 4 m/s | 2.7 |
| 1986 | 14.9°C | 11.5°C | 8.0°C | 18.8°C | 4.0°C | 56 mm | 73% | 4.2 m/s | 2.8 |
| 1985 | 16.2°C | 12.2°C | 8.1°C | 23.0°C | 5.3°C | 15 mm | 67% | 3.8 m/s | 2.8 |
| 1984 | 14.5°C | 10.9°C | 7.3°C | 17.6°C | 4.9°C | 42 mm | 75% | 3.8 m/s | 2.1 |
| 1983 | 14.7°C | 10.8°C | 7.0°C | 17.8°C | 3.0°C | 56 mm | 74% | 4 m/s | — |
| 1982 ❄️ | 15.3°C | 10.6°C | 6.0°C | 18.5°C | 2.4°C | 6 mm | 69% | 3.2 m/s | — |
| 1981 | 16.1°C | 11.7°C | 7.4°C | 19.8°C | 4.9°C | 43 mm | 71% | 4.4 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 15.9°C with lows near 7.7°C (mean 11.8°C), based on 45 years of NASA POWER data.
July averages 29 mm of rainfall in Whyalla, about average for rainfall. The wettest on record was 64 mm in 1996.
The hottest July reached 24.5°C in 2017. The coldest dipped to 2.4°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 0.8°C. Daytime highs moved from 15.4°C to 16.1°C and overnight lows from 7.2°C to 7.8°C over the same span.
July is one of the cooler months of the year in Whyalla and about average for rainfall, so plan for around 15.9°C daytime highs and 7.7°C at night.
Yes — July is the coldest month of the year in Whyalla, averaging 11.8°C.
For July in Whyalla, pack warm layers and a jacket for chilly mornings, with typical highs of 15.9°C and lows of 7.7°C.
Relative humidity in July averages 73% — moderately humid.
Average wind speed in July is 3.8 m/s. The windiest July on record averaged 4.6 m/s (1995).
The wettest July on record was 1996 with 64 mm. On average, July sees 29 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 Whyalla 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.
