July is one of the cooler months of the year in Sunbury, with average highs near 11.3°C and lows around 3.7°C (mean 7.5°C). It is about average for rainfall, averaging 67 mm of rainfall and 88% relative humidity across the period.
July is one of the cooler months of the year in Sunbury. Across 45 years of records, the warmest Julys in Sunbury were 2001 and 2023 — when the month averaged 8.8°C — while the coldest were 1982 and 1995 at 6°C. Typical July days reach 11.3°C with nights near 3.7°C. The long-term trend is warming, about 0.4°C per decade.
July is about average for rainfall in Sunbury, averaging 67 mm of rainfall. The wettest July on record was 1981 with 128 mm, while the driest was 2023 at 21 mm.
Relative humidity in Sunbury during July averages 88%. The most humid July was 1995 at 93%, and the least humid was 2018 at 81%.
July receives about 2 kWh/m²/day of solar energy in Sunbury. The sunniest Julys were 1985, 1994 and 2017 at 2.3 kWh/m²/day, and the cloudiest was 1984 at 1.4.
Average wind speed in Sunbury during July is 2.2 m/s. The windiest July was 2018 at 2.8 m/s, while the calmest were 1982 and 2001 at 1.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.7°C | 7.2°C | 7.8°C | 7.9°C | 8.0°C | +1.3°C |
| Avg High | 10.3°C | 11.0°C | 11.7°C | 11.7°C | 11.9°C | +1.6°C |
| Avg Low | 3.0°C | 3.5°C | 3.8°C | 4.1°C | 4.1°C | +1.1°C |
| Avg Rain | 87 mm | 72 mm | 64 mm | 59 mm | 50 mm | -37 mm |
July temperatures in Sunbury have risen by about 1.5°C between 1981–1985 and 2021–2025.
July has ranged from a record low of -2.6°C (1982) to a record high of 18.3°C (2013).
Rainfall in July is about average for rainfall, averaging 67 mm, with a wettest year of 128 mm.
A quieter season to visit Sunbury
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Sunbury. That said, July — with days averaging 11.3°C and nights around 3.7°C (mean 7.5°C) and moderate rainfall (67 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 | 12.2°C | 8.1°C | 4.0°C | 16.1°C | 1.2°C | 64 mm | 86% | 2.3 m/s | 2 |
| 2024 | 11.8°C | 7.9°C | 3.9°C | 15.3°C | 0.3°C | 78 mm | 88% | 2.2 m/s | 2 |
| 2023 | 12.9°C | 8.8°C | 4.6°C | 16.0°C | 0.7°C | 21 mm | 87% | 2.2 m/s | 2.2 |
| 2022 | 11.9°C | 7.7°C | 3.5°C | 15.2°C | -1.3°C | 39 mm | 87% | 2 m/s | 2.2 |
| 2021 | 10.8°C | 7.4°C | 4.0°C | 14.8°C | 0.2°C | 61 mm | 88% | 2.6 m/s | 2 |
| 2020 | 11.7°C | 8.1°C | 4.5°C | 14.2°C | 1.0°C | 34 mm | 91% | 1.8 m/s | 2.1 |
| 2019 | 12.7°C | 8.5°C | 4.3°C | 16.5°C | 1.3°C | 47 mm | 85% | 2.4 m/s | 2.1 |
| 2018 | 12.4°C | 8.0°C | 3.6°C | 16.6°C | 0.5°C | 34 mm | 81% | 2.8 m/s | 2.2 |
| 2017 | 12.1°C | 7.4°C | 2.7°C | 16.7°C | -1.9°C | 41 mm | 82% | 2.4 m/s | 2.3 |
| 2016 | 11.6°C | 8.2°C | 4.8°C | 14.8°C | -0.3°C | 56 mm | 89% | 2.6 m/s | 1.8 |
| 2015 | 11.0°C | 6.9°C | 2.8°C | 14.0°C | -1.5°C | 60 mm | 85% | 2.4 m/s | 1.9 |
| 2014 | 11.2°C | 8.0°C | 4.7°C | 15.1°C | 1.2°C | 71 mm | 90% | 2.5 m/s | 1.9 |
| 2013 | 12.2°C | 8.6°C | 5.0°C | 18.3°C | 0.4°C | 85 mm | 88% | 2.3 m/s | 2 |
| 2012 | 11.2°C | 7.9°C | 4.6°C | 13.6°C | -1.1°C | 80 mm | 91% | 2 m/s | 2 |
| 2011 | 11.3°C | 7.7°C | 4.1°C | 15.6°C | 0.2°C | 64 mm | 89% | 2.4 m/s | 2 |
| 2010 | 11.7°C | 8.0°C | 4.3°C | 14.3°C | 0.5°C | 59 mm | 90% | 1.7 m/s | 1.9 |
| 2009 | 12.0°C | 8.0°C | 4.1°C | 15.2°C | -0.2°C | 63 mm | 85% | 2.5 m/s | 2.1 |
| 2008 | 11.3°C | 7.3°C | 3.4°C | 15.5°C | 0.5°C | 74 mm | 85% | 2.3 m/s | 2.1 |
| 2007 | 10.4°C | 7.0°C | 3.6°C | 15.0°C | -0.2°C | 93 mm | 90% | 2.2 m/s | 2.1 |
| 2006 | 11.9°C | 8.0°C | 4.2°C | 14.0°C | -0.1°C | 61 mm | 87% | 2 m/s | 2 |
| 2005 | 12.5°C | 8.4°C | 4.4°C | 15.4°C | 0.3°C | 50 mm | 88% | 2 m/s | 2 |
| 2004 | 11.0°C | 7.2°C | 3.3°C | 13.2°C | -0.2°C | 55 mm | 87% | 2.3 m/s | 2 |
| 2003 | 12.0°C | 7.9°C | 3.7°C | 14.5°C | 1.5°C | 94 mm | 86% | 2.3 m/s | 2.1 |
| 2002 | 12.3°C | 7.6°C | 2.9°C | 15.5°C | -2.1°C | 41 mm | 81% | 2.5 m/s | 2.2 |
| 2001 🔥 | 12.6°C | 8.8°C | 5.0°C | 15.2°C | 1.1°C | 30 mm | 90% | 1.6 m/s | 1.8 |
| 2000 | 11.1°C | 7.4°C | 3.7°C | 13.9°C | 0.2°C | 74 mm | 89% | 2.2 m/s | 2 |
| 1999 | 12.3°C | 8.2°C | 4.0°C | 15.6°C | 0.1°C | 36 mm | 87% | 2 m/s | 2 |
| 1998 | 10.9°C | 7.1°C | 3.3°C | 13.4°C | 0.2°C | 79 mm | 88% | 1.9 m/s | 2 |
| 1997 | 11.3°C | 7.0°C | 2.7°C | 15.2°C | -1.1°C | 28 mm | 85% | 1.8 m/s | 2.1 |
| 1996 | 10.0°C | 6.6°C | 3.3°C | 13.5°C | -0.8°C | 108 mm | 92% | 2.1 m/s | 1.8 |
| 1995 | 9.0°C | 6.0°C | 3.0°C | 11.8°C | 0.8°C | 94 mm | 93% | 2.3 m/s | 1.7 |
| 1994 | 12.2°C | 7.5°C | 2.8°C | 17.8°C | -1.9°C | 28 mm | 84% | 2.1 m/s | 2.3 |
| 1993 | 11.7°C | 7.8°C | 3.9°C | 14.7°C | 0.6°C | 92 mm | 88% | 2.1 m/s | 2 |
| 1992 | 10.9°C | 7.2°C | 3.5°C | 14.2°C | 0.1°C | 46 mm | 88% | 2.3 m/s | 2.2 |
| 1991 | 10.5°C | 7.3°C | 4.0°C | 13.9°C | 0.8°C | 94 mm | 91% | 2 m/s | 2 |
| 1990 | 10.9°C | 7.6°C | 4.2°C | 14.6°C | 0.6°C | 115 mm | 91% | 2.5 m/s | 1.9 |
| 1989 | 9.7°C | 6.3°C | 2.9°C | 15.4°C | -1.3°C | 88 mm | 92% | 2.1 m/s | 2 |
| 1988 | 11.9°C | 8.1°C | 4.4°C | 14.2°C | 1.6°C | 84 mm | 91% | 2.2 m/s | 1.9 |
| 1987 | 10.9°C | 6.9°C | 2.9°C | 14.9°C | 0.2°C | 98 mm | 89% | 2.1 m/s | 2.1 |
| 1986 | 9.5°C | 6.4°C | 3.2°C | 12.5°C | -0.8°C | 119 mm | 93% | 2.3 m/s | 2 |
| 1985 | 10.8°C | 6.8°C | 2.8°C | 16.2°C | -1.4°C | 66 mm | 87% | 2.3 m/s | 2.3 |
| 1984 | 9.8°C | 6.4°C | 3.1°C | 14.2°C | -2.1°C | 72 mm | 90% | 2 m/s | 1.4 |
| 1983 | 9.8°C | 6.5°C | 3.1°C | 13.3°C | -1.4°C | 105 mm | 92% | 2.1 m/s | — |
| 1982 ❄️ | 10.7°C | 6.0°C | 1.3°C | 14.4°C | -2.6°C | 25 mm | 86% | 1.6 m/s | — |
| 1981 🌧️ | 9.9°C | 6.6°C | 3.2°C | 13.5°C | 0.3°C | 128 mm | 91% | 2.6 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 11.3°C with lows near 3.7°C (mean 7.5°C), based on 45 years of NASA POWER data.
July averages 67 mm of rainfall in Sunbury, about average for rainfall. The wettest on record was 128 mm in 1981.
The hottest July reached 18.3°C in 2013. The coldest dipped to -2.6°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.5°C. Daytime highs moved from 10.2°C to 11.9°C and overnight lows from 2.7°C to 4°C over the same span.
July is one of the cooler months of the year in Sunbury and about average for rainfall, so plan for around 11.3°C daytime highs and 3.7°C at night.
Yes — July is the coldest month of the year in Sunbury, averaging 7.5°C.
For July in Sunbury, pack warm layers and a jacket for chilly mornings, with typical highs of 11.3°C and lows of 3.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 88% — quite humid.
Average wind speed in July is 2.2 m/s. The windiest July on record averaged 2.8 m/s (2018).
The wettest July on record was 1981 with 128 mm. On average, July sees 67 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 Sunbury 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.
