June is one of the cooler months of the year in Grafton, with average highs near 18.9°C and lows around 12.4°C (mean 15.7°C). It is one of the drier months, averaging 93 mm of rainfall and 75% relative humidity across the period.
June is one of the cooler months of the year in Grafton. Across 45 years of records, the warmest June in Grafton was 2019 — when the month averaged 17.1°C — while the coldest was 1985 at 14°C. Typical June days reach 18.9°C with nights near 12.4°C. The long-term trend is warming, about 0.2°C per decade.
June is one of the drier months in Grafton, averaging 93 mm of rainfall. The wettest June on record was 2005 with 272 mm, while the driest was 2023 at 8 mm.
Relative humidity in Grafton during June averages 75%. The most humid June was 2017 at 82%, and the least humid was 2023 at 63%.
June receives about 3 kWh/m²/day of solar energy in Grafton. The sunniest Junes were 2004 and 2022 at 3.4 kWh/m²/day, and the cloudiest were 2005, 2013 and 2016 at 2.7.
Average wind speed in Grafton during June is 2.5 m/s. The windiest June was 2017 at 3.1 m/s, while the calmest was 2023 at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.0°C | 15.6°C | 16.1°C | 16.0°C | 15.6°C | +0.6°C |
| Avg High | 18.1°C | 18.7°C | 19.5°C | 19.2°C | 19.1°C | +1°C |
| Avg Low | 11.8°C | 12.4°C | 12.7°C | 12.9°C | 12.2°C | +0.4°C |
| Avg Rain | 96 mm | 84 mm | 99 mm | 128 mm | 34 mm | -63 mm |
June temperatures in Grafton have risen by about 0.8°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 4.9°C (1990) to a record high of 26°C (2002).
Rainfall in June is one of the drier months, averaging 93 mm, with a wettest year of 272 mm.
A quieter season to visit Grafton
If your dates are flexible, the more temperate months of November and October tend to be the most comfortable for visiting Grafton. That said, June — with days averaging 18.9°C and nights around 12.4°C (mean 15.7°C) and higher rainfall (93 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 | 18.4°C | 15.5°C | 12.5°C | 22.0°C | 8.8°C | 65 mm | 78% | 2.4 m/s | 3.1 |
| 2024 | 19.4°C | 15.8°C | 12.2°C | 25.3°C | 8.9°C | 24 mm | 74% | 2.2 m/s | 3 |
| 2023 | 21.0°C | 16.7°C | 12.5°C | 24.2°C | 8.1°C | 8 mm | 63% | 1.9 m/s | 3.3 |
| 2022 | 18.1°C | 14.4°C | 10.8°C | 20.5°C | 7.0°C | 15 mm | 75% | 2.1 m/s | 3.4 |
| 2021 | 18.4°C | 15.1°C | 11.9°C | 20.7°C | 8.4°C | 34 mm | 78% | 2.4 m/s | 3 |
| 2020 | 19.1°C | 16.1°C | 13.1°C | 23.3°C | 8.6°C | 56 mm | 77% | 2.4 m/s | 3.2 |
| 2019 🔥 | 20.3°C | 17.1°C | 14.0°C | 24.0°C | 9.5°C | 85 mm | 75% | 2.6 m/s | 2.8 |
| 2018 | 19.9°C | 16.3°C | 12.8°C | 23.7°C | 8.6°C | 68 mm | 71% | 2.6 m/s | 3.2 |
| 2017 | 19.0°C | 16.4°C | 13.8°C | 21.2°C | 9.7°C | 241 mm | 82% | 3.1 m/s | 2.9 |
| 2016 | 19.3°C | 16.1°C | 13.0°C | 24.8°C | 7.3°C | 190 mm | 74% | 2.7 m/s | 2.7 |
| 2015 | 18.9°C | 15.9°C | 12.9°C | 21.4°C | 8.4°C | 43 mm | 79% | 2.2 m/s | 3 |
| 2014 | 20.4°C | 16.7°C | 13.0°C | 23.5°C | 8.8°C | 35 mm | 72% | 2.5 m/s | 3.3 |
| 2013 | 18.4°C | 15.6°C | 12.8°C | 22.3°C | 8.4°C | 109 mm | 79% | 2.5 m/s | 2.7 |
| 2012 | 18.2°C | 15.3°C | 12.4°C | 21.2°C | 8.8°C | 194 mm | 79% | 2.8 m/s | 2.9 |
| 2011 | 18.5°C | 15.2°C | 11.9°C | 21.6°C | 7.0°C | 215 mm | 74% | 2.6 m/s | 2.9 |
| 2010 | 18.7°C | 15.6°C | 12.5°C | 20.8°C | 7.6°C | 95 mm | 74% | 2.6 m/s | 3 |
| 2009 | 18.3°C | 15.1°C | 11.9°C | 20.5°C | 6.3°C | 181 mm | 80% | 2.3 m/s | 2.9 |
| 2008 | 20.1°C | 16.8°C | 13.6°C | 22.8°C | 9.0°C | 85 mm | 77% | 2.6 m/s | 3.2 |
| 2007 | 18.6°C | 15.3°C | 12.0°C | 22.8°C | 7.3°C | 110 mm | 74% | 2.7 m/s | 2.9 |
| 2006 | 19.0°C | 16.0°C | 13.0°C | 21.6°C | 9.0°C | 97 mm | 73% | 2.6 m/s | 3.1 |
| 2005 🌧️ | 19.8°C | 16.9°C | 14.0°C | 23.7°C | 8.4°C | 272 mm | 75% | 2.5 m/s | 2.7 |
| 2004 | 20.6°C | 16.3°C | 11.9°C | 25.1°C | 7.7°C | 17 mm | 66% | 2.3 m/s | 3.4 |
| 2003 | 19.4°C | 16.0°C | 12.5°C | 23.3°C | 8.6°C | 74 mm | 78% | 2.2 m/s | 3 |
| 2002 | 20.3°C | 16.6°C | 12.9°C | 26.0°C | 7.7°C | 78 mm | 68% | 2.8 m/s | 3 |
| 2001 | 19.8°C | 16.7°C | 13.6°C | 23.2°C | 7.9°C | 21 mm | 77% | 2.1 m/s | 3 |
| 2000 | 18.9°C | 15.2°C | 11.6°C | 23.6°C | 6.8°C | 58 mm | 72% | 2.6 m/s | 3 |
| 1999 | 18.2°C | 15.5°C | 12.7°C | 20.5°C | 7.3°C | 204 mm | 78% | 3 m/s | 3 |
| 1998 | 20.1°C | 16.7°C | 13.2°C | 24.7°C | 7.0°C | 49 mm | 74% | 2.6 m/s | 2.8 |
| 1997 | 19.1°C | 16.0°C | 12.9°C | 23.2°C | 9.7°C | 68 mm | 77% | 2.7 m/s | 3.1 |
| 1996 | 18.7°C | 16.2°C | 13.6°C | 21.3°C | 8.5°C | 93 mm | 81% | 2.3 m/s | 2.8 |
| 1995 | 18.4°C | 15.2°C | 12.0°C | 23.2°C | 8.0°C | 48 mm | 75% | 2.8 m/s | 2.8 |
| 1994 | 18.9°C | 15.2°C | 11.5°C | 22.7°C | 8.4°C | 28 mm | 70% | 2.3 m/s | 3.3 |
| 1993 | 19.4°C | 15.8°C | 12.1°C | 23.8°C | 7.6°C | 42 mm | 71% | 2.5 m/s | 3.1 |
| 1992 | 17.8°C | 14.4°C | 11.1°C | 20.1°C | 7.3°C | 38 mm | 75% | 2.2 m/s | 3.3 |
| 1991 | 19.7°C | 16.3°C | 12.8°C | 22.9°C | 8.9°C | 184 mm | 80% | 2.3 m/s | 3.1 |
| 1990 | 17.2°C | 14.5°C | 11.7°C | 19.0°C | 4.9°C | 84 mm | 79% | 2.8 m/s | 3.1 |
| 1989 | 17.9°C | 15.0°C | 12.2°C | 21.5°C | 7.4°C | 182 mm | 80% | 2.7 m/s | 2.9 |
| 1988 | 18.4°C | 15.3°C | 12.2°C | 23.2°C | 8.5°C | 122 mm | 78% | 2.5 m/s | 3.3 |
| 1987 | 18.6°C | 15.8°C | 13.0°C | 21.4°C | 7.2°C | 119 mm | 79% | 2.4 m/s | 2.9 |
| 1986 | 18.7°C | 15.2°C | 11.7°C | 23.8°C | 5.5°C | 41 mm | 70% | 2.1 m/s | 3.3 |
| 1985 ❄️ | 17.2°C | 14.0°C | 10.7°C | 22.4°C | 5.7°C | 31 mm | 76% | 2.2 m/s | 3.3 |
| 1984 | 18.7°C | 15.8°C | 12.9°C | 21.0°C | 8.4°C | 132 mm | 79% | 2.6 m/s | 3.3 |
| 1983 | 17.5°C | 14.8°C | 12.1°C | 20.6°C | 7.0°C | 194 mm | 77% | 2.7 m/s | — |
| 1982 | 18.2°C | 14.6°C | 10.9°C | 20.1°C | 7.8°C | 24 mm | 68% | 2.8 m/s | — |
| 1981 | 17.8°C | 14.2°C | 10.5°C | 22.4°C | 6.5°C | 23 mm | 75% | 2.5 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 18.9°C with lows near 12.4°C (mean 15.7°C), based on 45 years of NASA POWER data.
June averages 93 mm of rainfall in Grafton, one of the drier months. The wettest on record was 272 mm in 2005.
The hottest June reached 26°C in 2002. The coldest dipped to 4.9°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 0.8°C. Daytime highs moved from 17.9°C to 19.1°C and overnight lows from 11.4°C to 12°C over the same span.
June is one of the cooler months of the year in Grafton and one of the drier months, so plan for around 18.9°C daytime highs and 12.4°C at night.
Not quite — June is the 2nd coolest month in Grafton, averaging 15.7°C.
For June in Grafton, pack light layers you can adjust through the day, with typical highs of 18.9°C and lows of 12.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 75% — quite humid.
Average wind speed in June is 2.5 m/s. The windiest June on record averaged 3.1 m/s (2017).
The wettest June on record was 2005 with 272 mm. On average, June sees 93 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 Grafton 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.
