July is one of the cooler months of the year in Grafton, with average highs near 18.5°C and lows around 11.1°C (mean 14.8°C). It is one of the drier months, averaging 57 mm of rainfall and 73% relative humidity across the period.
July is one of the cooler months of the year in Grafton. Across 45 years of records, the warmest July in Grafton was 2023 — when the month averaged 16.7°C — while the coldest was 1989 at 13.4°C. Typical July days reach 18.5°C with nights near 11.1°C. The long-term trend is warming, about 0.3°C per decade.
July is one of the drier months in Grafton, averaging 57 mm of rainfall. The wettest July on record was 1999 with 203 mm, while the driest was 2007 at 2 mm.
Relative humidity in Grafton during July averages 73%. The most humid July was 1993 at 82%, and the least humid was 2002 at 61%.
July receives about 3.3 kWh/m²/day of solar energy in Grafton. The sunniest Julys were 2002, 2007 and 2017 at 3.8 kWh/m²/day, and the cloudiest was 1984 at 2.2.
Average wind speed in Grafton during July is 2.5 m/s. The windiest Julys were 1983 and 2012 at 2.9 m/s, while the calmest were 2016 and 2017 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.1°C | 14.7°C | 15.0°C | 15.2°C | 15.2°C | +1.1°C |
| Avg High | 17.6°C | 18.2°C | 18.9°C | 19.0°C | 18.8°C | +1.2°C |
| Avg Low | 10.5°C | 11.2°C | 11.1°C | 11.4°C | 11.6°C | +1.1°C |
| Avg Rain | 86 mm | 72 mm | 36 mm | 36 mm | 56 mm | -30 mm |
July temperatures in Grafton have risen by about 1.3°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 5.3°C (1995) to a record high of 25.5°C (2023).
Rainfall in July is one of the drier months, averaging 57 mm, with a wettest year of 203 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, July — with days averaging 18.5°C and nights around 11.1°C (mean 14.8°C) and moderate rainfall (57 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 | 18.1°C | 14.7°C | 11.3°C | 21.1°C | 7.5°C | 52 mm | 76% | 2.5 m/s | 3.2 |
| 2024 | 18.8°C | 15.2°C | 11.7°C | 23.1°C | 7.1°C | 66 mm | 73% | 2.7 m/s | 3.3 |
| 2023 🔥 | 21.0°C | 16.7°C | 12.4°C | 25.5°C | 9.6°C | 22 mm | 66% | 2.2 m/s | 3.4 |
| 2022 | 17.6°C | 14.7°C | 11.7°C | 21.9°C | 8.5°C | 60 mm | 79% | 2.6 m/s | 3 |
| 2021 | 18.5°C | 14.8°C | 11.0°C | 22.5°C | 7.8°C | 46 mm | 75% | 2.6 m/s | 3.3 |
| 2020 | 18.7°C | 15.1°C | 11.6°C | 22.9°C | 7.5°C | 88 mm | 77% | 2.7 m/s | 3.2 |
| 2019 | 20.5°C | 16.4°C | 12.3°C | 24.3°C | 8.2°C | 43 mm | 68% | 2.2 m/s | 3.5 |
| 2018 | 20.6°C | 16.0°C | 11.3°C | 25.2°C | 5.5°C | 25 mm | 68% | 2.3 m/s | 3.5 |
| 2017 | 18.8°C | 14.5°C | 10.2°C | 22.5°C | 6.7°C | 13 mm | 76% | 2.1 m/s | 3.8 |
| 2016 | 19.8°C | 15.8°C | 11.8°C | 25.1°C | 8.4°C | 11 mm | 72% | 2.1 m/s | 3.3 |
| 2015 | 18.1°C | 14.4°C | 10.7°C | 22.3°C | 6.3°C | 37 mm | 74% | 2.3 m/s | 3.2 |
| 2014 | 19.5°C | 14.9°C | 10.3°C | 23.3°C | 7.2°C | 19 mm | 65% | 2.4 m/s | 3.7 |
| 2013 | 18.3°C | 15.3°C | 12.3°C | 22.0°C | 8.3°C | 67 mm | 81% | 2.4 m/s | 3.2 |
| 2012 | 17.7°C | 14.7°C | 11.7°C | 23.0°C | 7.7°C | 43 mm | 78% | 2.9 m/s | 3.3 |
| 2011 | 17.8°C | 14.3°C | 10.9°C | 20.6°C | 7.0°C | 24 mm | 72% | 2.4 m/s | 3.5 |
| 2010 | 18.9°C | 15.6°C | 12.4°C | 23.7°C | 9.0°C | 83 mm | 77% | 2.8 m/s | 2.9 |
| 2009 | 17.6°C | 14.1°C | 10.6°C | 21.3°C | 7.5°C | 34 mm | 76% | 2.5 m/s | 3.6 |
| 2008 | 18.3°C | 14.7°C | 11.2°C | 22.9°C | 7.5°C | 89 mm | 71% | 2.7 m/s | 3.2 |
| 2007 | 18.5°C | 14.2°C | 9.8°C | 23.8°C | 5.5°C | 2 mm | 64% | 2.5 m/s | 3.8 |
| 2006 | 19.2°C | 15.5°C | 11.7°C | 22.8°C | 6.3°C | 83 mm | 73% | 2.5 m/s | 3.3 |
| 2005 | 18.8°C | 15.3°C | 11.7°C | 21.5°C | 8.8°C | 21 mm | 77% | 2.4 m/s | 3.5 |
| 2004 | 19.9°C | 15.9°C | 12.0°C | 24.8°C | 7.4°C | 25 mm | 66% | 2.7 m/s | 3.4 |
| 2003 | 18.2°C | 14.7°C | 11.2°C | 20.6°C | 6.6°C | 25 mm | 72% | 2.4 m/s | 3.4 |
| 2002 | 19.8°C | 15.0°C | 10.2°C | 23.2°C | 5.4°C | 3 mm | 61% | 2.3 m/s | 3.8 |
| 2001 | 18.7°C | 15.2°C | 11.7°C | 23.0°C | 7.6°C | 63 mm | 75% | 2.5 m/s | 3.1 |
| 2000 | 19.5°C | 15.3°C | 11.1°C | 24.3°C | 7.3°C | 18 mm | 68% | 2.8 m/s | 3.4 |
| 1999 🌧️ | 17.9°C | 15.4°C | 12.8°C | 20.7°C | 7.6°C | 203 mm | 81% | 2.8 m/s | 3 |
| 1998 | 19.2°C | 15.7°C | 12.2°C | 24.4°C | 6.6°C | 67 mm | 76% | 2.7 m/s | 2.9 |
| 1997 | 17.7°C | 15.0°C | 12.2°C | 22.5°C | 9.1°C | 58 mm | 78% | 2.7 m/s | 3.2 |
| 1996 | 17.1°C | 13.5°C | 10.0°C | 20.1°C | 6.5°C | 67 mm | 75% | 2.5 m/s | 3.4 |
| 1995 | 18.9°C | 14.3°C | 9.7°C | 22.6°C | 5.3°C | 5 mm | 65% | 2.5 m/s | 3.5 |
| 1994 | 18.5°C | 14.8°C | 11.1°C | 20.9°C | 7.8°C | 43 mm | 69% | 2.4 m/s | 3.7 |
| 1993 | 19.2°C | 16.4°C | 13.6°C | 23.1°C | 10.9°C | 138 mm | 82% | 2.2 m/s | 3 |
| 1992 | 18.9°C | 14.7°C | 10.4°C | 23.5°C | 8.2°C | 38 mm | 71% | 2.4 m/s | 3.6 |
| 1991 | 17.7°C | 13.7°C | 9.7°C | 21.8°C | 6.2°C | 49 mm | 71% | 2.2 m/s | 3.5 |
| 1990 | 17.4°C | 13.9°C | 10.3°C | 23.2°C | 5.5°C | 56 mm | 79% | 2.4 m/s | 3.3 |
| 1989 ❄️ | 16.7°C | 13.4°C | 10.1°C | 21.0°C | 6.1°C | 35 mm | 77% | 2.5 m/s | 3.3 |
| 1988 | 18.4°C | 15.1°C | 11.8°C | 20.8°C | 7.5°C | 178 mm | 79% | 2.5 m/s | 3.3 |
| 1987 | 17.2°C | 13.7°C | 10.2°C | 20.4°C | 7.6°C | 64 mm | 75% | 2.4 m/s | 3.6 |
| 1986 | 18.7°C | 14.8°C | 10.9°C | 23.8°C | 5.8°C | 37 mm | 71% | 2.6 m/s | 3.2 |
| 1985 | 17.2°C | 13.7°C | 10.2°C | 21.0°C | 6.3°C | 188 mm | 76% | 2.4 m/s | 3.5 |
| 1984 | 16.6°C | 13.7°C | 10.7°C | 19.5°C | 6.0°C | 108 mm | 78% | 2.5 m/s | 2.2 |
| 1983 | 16.9°C | 13.9°C | 10.8°C | 21.9°C | 6.9°C | 70 mm | 80% | 2.9 m/s | — |
| 1982 | 18.1°C | 14.0°C | 9.9°C | 20.7°C | 6.2°C | 50 mm | 67% | 2.6 m/s | — |
| 1981 | 18.5°C | 14.3°C | 10.2°C | 24.8°C | 6.8°C | 43 mm | 71% | 2.4 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 18.5°C with lows near 11.1°C (mean 14.8°C), based on 45 years of NASA POWER data.
July averages 57 mm of rainfall in Grafton, one of the drier months. The wettest on record was 203 mm in 1999.
The hottest July reached 25.5°C in 2023. The coldest dipped to 5.3°C in 1995.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.3°C. Daytime highs moved from 17.5°C to 18.8°C and overnight lows from 10.4°C to 11.6°C over the same span.
July is one of the cooler months of the year in Grafton and one of the drier months, so plan for around 18.5°C daytime highs and 11.1°C at night.
Yes — July is the coldest month of the year in Grafton, averaging 14.8°C.
For July in Grafton, pack light layers you can adjust through the day, with typical highs of 18.5°C and lows of 11.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 73% — moderately humid.
Average wind speed in July is 2.5 m/s. The windiest July on record averaged 2.9 m/s (1983).
The wettest July on record was 1999 with 203 mm. On average, July sees 57 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 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.
