July is one of the cooler months of the year in Karratha, with average highs near 24.1°C and lows around 19.1°C (mean 21.6°C). It is one of the drier months, averaging 10 mm of rainfall and 60% relative humidity across the period.
July is one of the cooler months of the year in Karratha. Across 45 years of records, the warmest July in Karratha was 1987 — when the month averaged 22.8°C — while the coldest were 2006 and 2012 at 20.2°C. Typical July days reach 24.1°C with nights near 19.1°C. The long-term July temperature trend is broadly flat.
July is one of the drier months in Karratha, averaging 10 mm of rainfall. The wettest July on record was 2005 with 66 mm, while the driest were 2017, 2018 and 2022, among others at 0 mm.
Relative humidity in Karratha during July averages 60%. The most humid July was 2016 at 68%, and the least humid was 1982 at 53%.
July receives about 4.6 kWh/m²/day of solar energy in Karratha. The sunniest Julys were 2002, 2018 and 2022 at 4.9 kWh/m²/day, and the cloudiest was 1984 at 3.7.
Average wind speed in Karratha during July is 4.6 m/s. The windiest July was 1997 at 5.8 m/s, while the calmest was 2017 at 3.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.7°C | 21.6°C | 21.6°C | 21.5°C | 21.7°C | 0°C |
| Avg High | 24.2°C | 24.1°C | 24.1°C | 24.0°C | 24.3°C | +0.1°C |
| Avg Low | 19.3°C | 19.1°C | 19.1°C | 19.0°C | 19.1°C | -0.2°C |
| Avg Rain | 12 mm | 12 mm | 11 mm | 8 mm | 2 mm | -10 mm |
July temperatures in Karratha have stayed relatively stable across the record.
July has ranged from a record low of 13.1°C (1997) to a record high of 29.1°C (1987).
Rainfall in July is one of the drier months, averaging 10 mm, with a wettest year of 66 mm.
One of the best times to visit Karratha
July is one of the best times to visit Karratha. Expect days averaging 24.1°C and nights around 19.1°C (mean 21.6°C) — cooler than Karratha's yearly average — with low rainfall (10 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 23.5°C | 20.9°C | 18.3°C | 26.3°C | 15.7°C | 3 mm | 58% | 4.7 m/s | 4.8 |
| 2024 | 24.5°C | 22.0°C | 19.5°C | 28.4°C | 16.6°C | 0 mm | 58% | 4.4 m/s | 4.8 |
| 2023 | 23.7°C | 20.9°C | 18.0°C | 27.4°C | 16.0°C | 0 mm | 58% | 4.5 m/s | 4.8 |
| 2022 | 23.6°C | 21.0°C | 18.5°C | 26.3°C | 16.1°C | 0 mm | 57% | 4.3 m/s | 4.9 |
| 2021 | 25.0°C | 22.5°C | 20.0°C | 27.7°C | 17.2°C | 0 mm | 62% | 4.3 m/s | 4.7 |
| 2020 | 25.2°C | 22.6°C | 20.0°C | 27.3°C | 17.7°C | 8 mm | 57% | 4.3 m/s | 4.7 |
| 2019 | 25.1°C | 22.4°C | 19.7°C | 27.2°C | 17.1°C | 1 mm | 57% | 4.2 m/s | 4.6 |
| 2018 | 24.2°C | 21.6°C | 19.0°C | 26.0°C | 16.2°C | 0 mm | 61% | 4 m/s | 4.9 |
| 2017 | 24.6°C | 22.2°C | 19.7°C | 27.2°C | 17.2°C | 0 mm | 56% | 3.7 m/s | 4.8 |
| 2016 | 24.2°C | 22.1°C | 20.0°C | 26.0°C | 16.7°C | 41 mm | 68% | 5.1 m/s | 3.9 |
| 2015 | 24.1°C | 21.5°C | 18.9°C | 26.7°C | 17.6°C | 7 mm | 62% | 5.3 m/s | 4.3 |
| 2014 | 23.2°C | 20.6°C | 18.1°C | 26.1°C | 15.8°C | 14 mm | 57% | 4.1 m/s | 4.6 |
| 2013 | 23.5°C | 21.0°C | 18.4°C | 25.5°C | 15.5°C | 0 mm | 64% | 4.4 m/s | 4.7 |
| 2012 | 22.8°C | 20.2°C | 17.7°C | 24.5°C | 15.6°C | 0 mm | 55% | 4.7 m/s | 4.8 |
| 2011 | 23.9°C | 21.5°C | 19.2°C | 26.0°C | 16.7°C | 12 mm | 68% | 4.4 m/s | 4.2 |
| 2010 | 24.3°C | 22.0°C | 19.6°C | 26.7°C | 16.3°C | 9 mm | 60% | 5.1 m/s | 4.2 |
| 2009 | 24.3°C | 21.7°C | 19.1°C | 26.7°C | 17.3°C | 1 mm | 58% | 4.9 m/s | 4.6 |
| 2008 | 23.8°C | 21.0°C | 18.3°C | 26.2°C | 15.5°C | 0 mm | 58% | 4.8 m/s | 4.8 |
| 2007 | 24.2°C | 22.1°C | 20.0°C | 26.3°C | 18.0°C | 22 mm | 66% | 4.9 m/s | 4.3 |
| 2006 ❄️ | 23.0°C | 20.2°C | 17.3°C | 25.4°C | 13.8°C | 0 mm | 59% | 4.8 m/s | 4.8 |
| 2005 🌧️ | 24.6°C | 21.7°C | 18.8°C | 26.1°C | 17.6°C | 66 mm | 59% | 4.5 m/s | 4.7 |
| 2004 | 24.2°C | 22.3°C | 20.5°C | 25.7°C | 18.6°C | 8 mm | 65% | 4.8 m/s | 3.9 |
| 2003 | 24.5°C | 21.7°C | 18.8°C | 26.4°C | 16.7°C | 0 mm | 58% | 4.1 m/s | 4.7 |
| 2002 | 24.6°C | 21.8°C | 19.1°C | 26.4°C | 17.2°C | 0 mm | 58% | 4.4 m/s | 4.9 |
| 2001 | 23.7°C | 21.6°C | 19.4°C | 25.8°C | 17.8°C | 12 mm | 64% | 4.8 m/s | 4.3 |
| 2000 | 24.5°C | 22.2°C | 19.9°C | 27.3°C | 17.4°C | 0 mm | 63% | 3.8 m/s | 4.7 |
| 1999 | 24.4°C | 21.7°C | 19.1°C | 26.2°C | 17.9°C | 2 mm | 58% | 4.8 m/s | 4.6 |
| 1998 | 23.8°C | 21.5°C | 19.3°C | 26.0°C | 15.1°C | 41 mm | 66% | 5.5 m/s | 4.2 |
| 1997 | 23.4°C | 20.7°C | 17.9°C | 25.6°C | 13.1°C | 21 mm | 59% | 5.8 m/s | 4.5 |
| 1996 | 25.0°C | 22.6°C | 20.2°C | 27.2°C | 15.9°C | 15 mm | 64% | 4.9 m/s | 4.6 |
| 1995 | 23.9°C | 21.4°C | 18.9°C | 25.4°C | 16.0°C | 15 mm | 62% | 4.9 m/s | 4.5 |
| 1994 | 24.7°C | 21.9°C | 19.1°C | 26.1°C | 17.6°C | 0 mm | 54% | 4.3 m/s | 4.8 |
| 1993 | 23.2°C | 20.6°C | 18.1°C | 26.7°C | 15.5°C | 1 mm | 60% | 5.1 m/s | 4.8 |
| 1992 | 25.2°C | 22.6°C | 19.9°C | 28.3°C | 17.8°C | 5 mm | 55% | 4.4 m/s | 4.6 |
| 1991 | 24.2°C | 21.8°C | 19.5°C | 26.2°C | 16.8°C | 12 mm | 63% | 4 m/s | 4.7 |
| 1990 | 23.5°C | 21.1°C | 18.7°C | 25.5°C | 15.7°C | 9 mm | 60% | 5.5 m/s | 4.3 |
| 1989 | 23.6°C | 21.2°C | 18.8°C | 26.5°C | 16.2°C | 3 mm | 58% | 4.7 m/s | 4.4 |
| 1988 | 25.1°C | 22.6°C | 20.1°C | 27.1°C | 18.2°C | 2 mm | 61% | 4.7 m/s | 4.8 |
| 1987 🔥 | 25.2°C | 22.8°C | 20.4°C | 29.1°C | 17.5°C | 4 mm | 57% | 4.1 m/s | 4.6 |
| 1986 | 22.6°C | 20.3°C | 18.0°C | 24.5°C | 15.5°C | 21 mm | 58% | 4.9 m/s | 4.5 |
| 1985 | 24.2°C | 21.9°C | 19.6°C | 25.8°C | 18.0°C | 4 mm | 61% | 4 m/s | 4.6 |
| 1984 | 23.8°C | 21.6°C | 19.4°C | 25.5°C | 16.8°C | 33 mm | 60% | 5.1 m/s | 3.7 |
| 1983 | 24.0°C | 21.5°C | 19.0°C | 26.7°C | 17.5°C | 6 mm | 54% | 5.1 m/s | — |
| 1982 | 24.7°C | 22.1°C | 19.5°C | 27.5°C | 17.4°C | 1 mm | 53% | 4.4 m/s | — |
| 1981 | 24.6°C | 21.6°C | 18.7°C | 26.5°C | 16.0°C | 31 mm | 57% | 5 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 24.1°C with lows near 19.1°C (mean 21.6°C), based on 45 years of NASA POWER data.
July averages 10 mm of rainfall in Karratha, one of the drier months. The wettest on record was 66 mm in 2005.
The hottest July reached 29.1°C in 1987. The coldest dipped to 13.1°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have fallen by about 0.2°C. Daytime highs moved from 24.3°C to 24.1°C and overnight lows from 19.2°C to 18.9°C over the same span.
July is one of the cooler months of the year in Karratha and one of the drier months, so plan for around 24.1°C daytime highs and 19.1°C at night.
Yes — July is the coldest month of the year in Karratha, averaging 21.6°C.
For July in Karratha, pack light layers you can adjust through the day, with typical highs of 24.1°C and lows of 19.1°C.
Relative humidity in July averages 60% — moderately humid.
Average wind speed in July is 4.6 m/s. The windiest July on record averaged 5.8 m/s (1997).
The wettest July on record was 2005 with 66 mm. On average, July sees 10 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 Karratha 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.
