June is one of the cooler months of the year in Onslow, with average highs near 25°C and lows around 19.5°C (mean 22.3°C). It is a relatively wet time of year, averaging 40 mm of rainfall and 61% relative humidity across the period.
June is one of the cooler months of the year in Onslow. Across 45 years of records, the warmest June in Onslow was 2010 — when the month averaged 23.7°C — while the coldest was 2023 at 20.6°C. Typical June days reach 25°C with nights near 19.5°C. The long-term June temperature trend is broadly flat.
June is a relatively wet time of year in Onslow, averaging 40 mm of rainfall. The wettest June on record was 1992 with 122 mm, while the driest were 1999, 2000 and 2004 at 0 mm.
Relative humidity in Onslow during June averages 61%. The most humid June was 1992 at 71%, and the least humid were 1985 and 2007 at 53%.
June receives about 3.9 kWh/m²/day of solar energy in Onslow. The sunniest June was 2004 at 4.5 kWh/m²/day, and the cloudiest was 1996 at 3.2.
Average wind speed in Onslow during June is 4.2 m/s. The windiest June was 1995 at 5.3 m/s, while the calmest was 2020 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.5°C | 22.4°C | 22.2°C | 22.1°C | 22.1°C | -0.4°C |
| Avg High | 25.2°C | 25.0°C | 25.0°C | 24.9°C | 24.8°C | -0.4°C |
| Avg Low | 19.8°C | 19.8°C | 19.4°C | 19.3°C | 19.3°C | -0.5°C |
| Avg Rain | 38 mm | 51 mm | 30 mm | 47 mm | 28 mm | -11 mm |
June temperatures in Onslow have fallen by about 0.7°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 13.4°C (2021) to a record high of 29.7°C (1984).
Rainfall in June is a relatively wet time of year, averaging 40 mm, with a wettest year of 122 mm.
One of the best times to visit Onslow
June is one of the best times to visit Onslow. Expect days averaging 25°C and nights around 19.5°C (mean 22.3°C) — cooler than Onslow's yearly average — with moderate rainfall (40 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 | 25.5°C | 22.6°C | 19.6°C | 27.3°C | 16.6°C | 16 mm | 55% | 4 m/s | 4.4 |
| 2024 | 25.5°C | 23.2°C | 20.9°C | 27.6°C | 17.6°C | 56 mm | 68% | 4 m/s | 4 |
| 2023 ❄️ | 23.7°C | 20.6°C | 17.5°C | 26.6°C | 13.6°C | 27 mm | 58% | 4.3 m/s | 4.1 |
| 2022 | 24.7°C | 22.1°C | 19.5°C | 26.2°C | 16.3°C | 50 mm | 69% | 3.8 m/s | 3.8 |
| 2021 | 23.6°C | 20.9°C | 18.2°C | 26.0°C | 13.4°C | 12 mm | 63% | 4.5 m/s | 3.4 |
| 2020 | 25.8°C | 23.1°C | 20.3°C | 27.1°C | 19.0°C | 4 mm | 59% | 3.1 m/s | 4.1 |
| 2019 | 24.2°C | 21.4°C | 18.5°C | 26.2°C | 14.9°C | 47 mm | 62% | 4.5 m/s | 4.2 |
| 2018 | 24.9°C | 21.9°C | 18.9°C | 27.5°C | 15.2°C | 47 mm | 62% | 4.4 m/s | 3.9 |
| 2017 | 25.7°C | 22.7°C | 19.7°C | 28.2°C | 16.7°C | 9 mm | 56% | 4.6 m/s | 4.1 |
| 2016 | 24.3°C | 21.8°C | 19.3°C | 26.5°C | 14.6°C | 97 mm | 67% | 4.1 m/s | 3.5 |
| 2015 | 25.2°C | 22.4°C | 19.6°C | 27.7°C | 15.8°C | 8 mm | 64% | 3.3 m/s | 4 |
| 2014 | 24.7°C | 21.8°C | 18.8°C | 27.5°C | 16.0°C | 14 mm | 61% | 4.7 m/s | 4 |
| 2013 | 24.7°C | 21.9°C | 19.1°C | 27.4°C | 15.8°C | 116 mm | 69% | 5 m/s | 3.3 |
| 2012 | 24.6°C | 21.8°C | 19.1°C | 26.6°C | 16.3°C | 40 mm | 63% | 4.7 m/s | 4 |
| 2011 | 24.0°C | 21.6°C | 19.2°C | 26.2°C | 15.7°C | 65 mm | 64% | 3.7 m/s | 3.9 |
| 2010 🔥 | 26.3°C | 23.7°C | 21.0°C | 28.2°C | 16.8°C | 22 mm | 62% | 4.1 m/s | 3.8 |
| 2009 | 24.2°C | 21.6°C | 19.0°C | 27.5°C | 15.6°C | 51 mm | 63% | 4.2 m/s | 3.7 |
| 2008 | 25.1°C | 22.2°C | 19.3°C | 28.3°C | 16.4°C | 40 mm | 61% | 4.7 m/s | 4 |
| 2007 | 25.2°C | 22.5°C | 19.8°C | 28.6°C | 17.0°C | 2 mm | 53% | 4.3 m/s | 4.3 |
| 2006 | 24.6°C | 21.6°C | 18.6°C | 26.2°C | 15.7°C | 3 mm | 54% | 4 m/s | 4 |
| 2005 | 24.4°C | 21.9°C | 19.5°C | 26.9°C | 16.4°C | 35 mm | 64% | 4.9 m/s | 3.9 |
| 2004 | 25.8°C | 22.8°C | 19.7°C | 28.2°C | 18.0°C | 0 mm | 59% | 3.7 m/s | 4.5 |
| 2003 | 25.8°C | 23.0°C | 20.3°C | 27.8°C | 17.2°C | 50 mm | 59% | 4.4 m/s | 3.9 |
| 2002 | 25.1°C | 22.1°C | 19.2°C | 27.3°C | 17.3°C | 107 mm | 58% | 4.2 m/s | 4.2 |
| 2001 | 25.5°C | 22.8°C | 20.1°C | 27.8°C | 17.2°C | 13 mm | 57% | 3.8 m/s | 4.3 |
| 2000 | 24.3°C | 21.3°C | 18.2°C | 25.7°C | 16.5°C | 0 mm | 59% | 4.7 m/s | 4.3 |
| 1999 | 25.7°C | 22.6°C | 19.5°C | 27.3°C | 17.9°C | 0 mm | 60% | 4 m/s | 4.2 |
| 1998 | 24.5°C | 22.0°C | 19.4°C | 28.8°C | 15.6°C | 79 mm | 68% | 4.7 m/s | 3.7 |
| 1997 | 25.4°C | 22.6°C | 19.8°C | 27.0°C | 16.5°C | 4 mm | 58% | 4.7 m/s | 3.7 |
| 1996 | 25.6°C | 23.6°C | 21.7°C | 29.5°C | 17.4°C | 104 mm | 71% | 3.3 m/s | 3.2 |
| 1995 | 24.3°C | 21.6°C | 18.8°C | 27.0°C | 15.8°C | 43 mm | 63% | 5.3 m/s | 3.5 |
| 1994 | 25.2°C | 22.2°C | 19.1°C | 27.4°C | 16.8°C | 13 mm | 54% | 4.4 m/s | 4.2 |
| 1993 | 24.8°C | 21.9°C | 19.1°C | 26.9°C | 15.9°C | 59 mm | 63% | 4.7 m/s | 3.8 |
| 1992 🌧️ | 24.6°C | 22.5°C | 20.4°C | 27.0°C | 16.9°C | 122 mm | 71% | 4.1 m/s | 3.5 |
| 1991 | 24.9°C | 22.6°C | 20.4°C | 27.3°C | 16.9°C | 79 mm | 67% | 4 m/s | 3.5 |
| 1990 | 24.9°C | 22.2°C | 19.5°C | 27.0°C | 16.4°C | 9 mm | 57% | 4.6 m/s | 3.9 |
| 1989 | 24.5°C | 22.2°C | 20.0°C | 27.2°C | 16.2°C | 99 mm | 65% | 4.7 m/s | 3.7 |
| 1988 | 26.1°C | 23.3°C | 20.4°C | 28.4°C | 17.4°C | 11 mm | 59% | 3.8 m/s | 4.1 |
| 1987 | 24.7°C | 22.1°C | 19.4°C | 26.6°C | 16.3°C | 53 mm | 63% | 3.9 m/s | 3.6 |
| 1986 | 24.5°C | 22.3°C | 20.2°C | 27.6°C | 18.3°C | 93 mm | 67% | 4.1 m/s | 3.5 |
| 1985 | 26.1°C | 23.2°C | 20.3°C | 27.3°C | 18.2°C | 6 mm | 53% | 3.9 m/s | 3.8 |
| 1984 | 26.5°C | 23.4°C | 20.2°C | 29.7°C | 17.9°C | 0 mm | 57% | 3.9 m/s | 4.2 |
| 1983 | 26.1°C | 23.6°C | 21.1°C | 28.1°C | 17.9°C | 27 mm | 61% | 3.8 m/s | — |
| 1982 | 24.3°C | 21.3°C | 18.3°C | 26.3°C | 15.3°C | 23 mm | 57% | 4.4 m/s | — |
| 1981 | 24.1°C | 21.4°C | 18.7°C | 26.1°C | 15.5°C | 32 mm | 61% | 4.5 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 25°C with lows near 19.5°C (mean 22.3°C), based on 45 years of NASA POWER data.
June averages 40 mm of rainfall in Onslow, a relatively wet time of year. The wettest on record was 122 mm in 1992.
The hottest June reached 29.7°C in 1984. The coldest dipped to 13.4°C in 2021.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have fallen by about 0.7°C. Daytime highs moved from 25.4°C to 24.6°C and overnight lows from 19.7°C to 19.1°C over the same span.
June is one of the cooler months of the year in Onslow and a relatively wet time of year, so plan for around 25°C daytime highs and 19.5°C at night.
Not quite — June is the 3rd coolest month in Onslow, averaging 22.3°C.
For June in Onslow, pack light layers you can adjust through the day, with typical highs of 25°C and lows of 19.5°C.
Relative humidity in June averages 61% — moderately humid.
Average wind speed in June is 4.2 m/s. The windiest June on record averaged 5.3 m/s (1995).
The wettest June on record was 1992 with 122 mm. On average, June sees 40 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 Onslow behaves each June, 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 June specifically, along with year-by-year records and how the month has changed over the decades.
