July is one of the cooler months of the year in Byron Bay, with average highs near 19.1°C and lows around 16°C (mean 17.6°C). It is one of the drier months, averaging 61 mm of rainfall and 71% relative humidity across the period.
July is one of the cooler months of the year in Byron Bay. Across 45 years of records, the warmest July in Byron Bay was 2019 — when the month averaged 18.9°C — while the coldest was 1989 at 16.3°C. Typical July days reach 19.1°C with nights near 16°C. The long-term trend is warming, about 0.3°C per decade.
July is one of the drier months in Byron Bay, averaging 61 mm of rainfall. The wettest July on record was 1999 with 215 mm, while the driest was 2002 at 3 mm.
Relative humidity in Byron Bay during July averages 71%. The most humid July was 1993 at 78%, and the least humid was 2002 at 63%.
July receives about 3.3 kWh/m²/day of solar energy in Byron Bay. The sunniest Julys were 2007 and 2017 at 3.8 kWh/m²/day, and the cloudiest was 1984 at 2.4.
Average wind speed in Byron Bay during July is 5.3 m/s. The windiest July was 2012 at 6.2 m/s, while the calmest was 1993 at 4.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.9°C | 17.4°C | 17.6°C | 18.0°C | 17.9°C | +1°C |
| Avg High | 18.4°C | 18.9°C | 19.1°C | 19.5°C | 19.5°C | +1.1°C |
| Avg Low | 15.3°C | 16.0°C | 16.1°C | 16.5°C | 16.4°C | +1.1°C |
| Avg Rain | 92 mm | 77 mm | 42 mm | 41 mm | 52 mm | -40 mm |
July temperatures in Byron Bay have risen by about 1.2°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 9.1°C (1984) to a record high of 25.1°C (2016).
Rainfall in July is one of the drier months, averaging 61 mm, with a wettest year of 215 mm.
A quieter season to visit Byron Bay
If your dates are flexible, the more temperate months of November and October tend to be the most comfortable for visiting Byron Bay. That said, July — with days averaging 19.1°C and nights around 16°C (mean 17.6°C) and moderate rainfall (61 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 | 19.5°C | 17.9°C | 16.2°C | 21.9°C | 12.3°C | 59 mm | 70% | 5.5 m/s | 3.3 |
| 2024 | 19.4°C | 17.9°C | 16.4°C | 21.9°C | 12.1°C | 70 mm | 71% | 6 m/s | 3.3 |
| 2023 | 20.2°C | 18.7°C | 17.2°C | 22.3°C | 14.8°C | 20 mm | 68% | 4.5 m/s | 3.3 |
| 2022 | 18.8°C | 17.3°C | 15.8°C | 21.7°C | 12.7°C | 64 mm | 74% | 5.6 m/s | 2.9 |
| 2021 | 19.5°C | 17.8°C | 16.1°C | 22.4°C | 13.2°C | 38 mm | 72% | 5.7 m/s | 3.2 |
| 2020 | 19.4°C | 17.9°C | 16.4°C | 21.5°C | 12.8°C | 60 mm | 74% | 5.7 m/s | 3.1 |
| 2019 🔥 | 20.3°C | 18.9°C | 17.4°C | 22.9°C | 13.1°C | 34 mm | 67% | 4.6 m/s | 3.4 |
| 2018 | 20.3°C | 18.7°C | 17.2°C | 23.6°C | 13.9°C | 17 mm | 68% | 4.9 m/s | 3.5 |
| 2017 | 20.0°C | 18.3°C | 16.5°C | 22.9°C | 13.7°C | 10 mm | 68% | 4.6 m/s | 3.8 |
| 2016 | 20.3°C | 18.6°C | 16.9°C | 25.1°C | 12.9°C | 9 mm | 70% | 4.7 m/s | 3.2 |
| 2015 | 19.1°C | 17.5°C | 15.8°C | 22.5°C | 10.0°C | 30 mm | 71% | 5.1 m/s | 3.3 |
| 2014 | 19.0°C | 17.3°C | 15.5°C | 22.3°C | 12.5°C | 22 mm | 66% | 4.9 m/s | 3.7 |
| 2013 | 19.2°C | 18.3°C | 17.3°C | 21.7°C | 13.9°C | 110 mm | 74% | 5 m/s | 2.9 |
| 2012 | 18.7°C | 17.5°C | 16.4°C | 21.8°C | 13.6°C | 61 mm | 73% | 6.2 m/s | 3.1 |
| 2011 | 18.5°C | 16.9°C | 15.3°C | 20.8°C | 12.3°C | 30 mm | 68% | 5.4 m/s | 3.5 |
| 2010 | 19.4°C | 18.2°C | 16.9°C | 23.9°C | 14.6°C | 85 mm | 75% | 5.8 m/s | 2.8 |
| 2009 | 18.5°C | 17.1°C | 15.7°C | 21.3°C | 12.2°C | 30 mm | 71% | 5.6 m/s | 3.5 |
| 2008 | 18.9°C | 17.6°C | 16.2°C | 22.7°C | 11.6°C | 93 mm | 70% | 5.7 m/s | 3 |
| 2007 | 18.5°C | 16.7°C | 14.9°C | 23.0°C | 11.8°C | 4 mm | 64% | 5.1 m/s | 3.8 |
| 2006 | 19.6°C | 18.2°C | 16.8°C | 22.1°C | 13.1°C | 91 mm | 71% | 5.3 m/s | 3.2 |
| 2005 | 19.7°C | 18.2°C | 16.8°C | 22.0°C | 13.2°C | 52 mm | 70% | 5.1 m/s | 3.4 |
| 2004 | 19.6°C | 18.1°C | 16.6°C | 23.6°C | 11.7°C | 25 mm | 68% | 5.3 m/s | 3.4 |
| 2003 | 18.9°C | 17.6°C | 16.2°C | 20.5°C | 12.0°C | 47 mm | 70% | 5.2 m/s | 3.4 |
| 2002 | 19.4°C | 17.6°C | 15.8°C | 22.2°C | 14.2°C | 3 mm | 63% | 4.9 m/s | 3.6 |
| 2001 | 19.2°C | 17.7°C | 16.3°C | 22.2°C | 13.0°C | 57 mm | 71% | 5.1 m/s | 3.2 |
| 2000 | 18.6°C | 17.0°C | 15.3°C | 21.4°C | 10.4°C | 21 mm | 72% | 5.7 m/s | 3.5 |
| 1999 🌧️ | 18.8°C | 17.7°C | 16.6°C | 20.9°C | 12.5°C | 215 mm | 75% | 6 m/s | 2.9 |
| 1998 | 19.6°C | 18.0°C | 16.4°C | 23.1°C | 11.1°C | 54 mm | 75% | 5.7 m/s | 3 |
| 1997 | 18.6°C | 17.7°C | 16.8°C | 21.8°C | 15.5°C | 73 mm | 76% | 5.7 m/s | 3.1 |
| 1996 | 18.4°C | 16.7°C | 14.9°C | 20.7°C | 11.1°C | 72 mm | 72% | 5.7 m/s | 3.5 |
| 1995 | 19.2°C | 17.2°C | 15.2°C | 23.1°C | 11.5°C | 8 mm | 66% | 5.6 m/s | 3.5 |
| 1994 | 18.5°C | 17.2°C | 16.0°C | 20.2°C | 12.2°C | 50 mm | 68% | 4.8 m/s | 3.5 |
| 1993 | 19.8°C | 18.8°C | 17.9°C | 22.7°C | 16.5°C | 136 mm | 78% | 4.3 m/s | 2.9 |
| 1992 | 19.2°C | 17.5°C | 15.8°C | 22.1°C | 11.5°C | 58 mm | 69% | 5.2 m/s | 3.5 |
| 1991 | 18.5°C | 16.7°C | 14.9°C | 21.8°C | 11.2°C | 62 mm | 67% | 4.8 m/s | 3.6 |
| 1990 | 18.6°C | 16.9°C | 15.2°C | 22.0°C | 11.3°C | 46 mm | 74% | 5 m/s | 3.4 |
| 1989 ❄️ | 17.9°C | 16.3°C | 14.7°C | 21.2°C | 10.9°C | 45 mm | 73% | 5.7 m/s | 3.2 |
| 1988 | 19.4°C | 18.0°C | 16.7°C | 21.3°C | 12.1°C | 193 mm | 72% | 5.5 m/s | 3.3 |
| 1987 | 18.2°C | 16.8°C | 15.3°C | 20.5°C | 11.5°C | 61 mm | 69% | 5 m/s | 3.5 |
| 1986 | 19.0°C | 17.4°C | 15.8°C | 22.0°C | 9.5°C | 46 mm | 72% | 5.7 m/s | 3.1 |
| 1985 | 18.1°C | 16.5°C | 15.0°C | 21.4°C | 10.8°C | 186 mm | 71% | 5.4 m/s | 3.4 |
| 1984 | 18.2°C | 16.6°C | 15.0°C | 21.5°C | 9.1°C | 127 mm | 75% | 5.5 m/s | 2.4 |
| 1983 | 18.2°C | 16.8°C | 15.4°C | 22.9°C | 11.0°C | 81 mm | 74% | 6.1 m/s | — |
| 1982 | 18.1°C | 16.5°C | 14.9°C | 20.8°C | 10.5°C | 37 mm | 68% | 5.2 m/s | — |
| 1981 | 18.6°C | 16.9°C | 15.3°C | 22.8°C | 11.9°C | 51 mm | 70% | 5.1 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 19.1°C with lows near 16°C (mean 17.6°C), based on 45 years of NASA POWER data.
July averages 61 mm of rainfall in Byron Bay, one of the drier months. The wettest on record was 215 mm in 1999.
The hottest July reached 25.1°C in 2016. The coldest dipped to 9.1°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.2°C. Daytime highs moved from 18.2°C to 19.5°C and overnight lows from 15.1°C to 16.3°C over the same span.
July is one of the cooler months of the year in Byron Bay and one of the drier months, so plan for around 19.1°C daytime highs and 16°C at night.
Yes — July is the coldest month of the year in Byron Bay, averaging 17.6°C.
For July in Byron Bay, pack light layers you can adjust through the day, with typical highs of 19.1°C and lows of 16°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 71% — moderately humid.
Average wind speed in July is 5.3 m/s. The windiest July on record averaged 6.2 m/s (2012).
The wettest July on record was 1999 with 215 mm. On average, July sees 61 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 Byron Bay 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.
