July is one of the cooler months of the year in Port Denison, with average highs near 18.9°C and lows around 11.9°C (mean 15.4°C). It is a relatively wet time of year, averaging 86 mm of rainfall and 72% relative humidity across the period.
July is one of the cooler months of the year in Port Denison. Across 45 years of records, the warmest July in Port Denison was 2007 — when the month averaged 17.1°C — while the coldest was 1986 at 13.5°C. Typical July days reach 18.9°C with nights near 11.9°C. The long-term trend is warming, about 0.3°C per decade.
July is a relatively wet time of year in Port Denison, averaging 86 mm of rainfall. The wettest Julys on record were 1996 and 2008 with 147 mm, while the driest was 2020 at 20 mm.
Relative humidity in Port Denison during July averages 72%. The most humid July was 1998 at 78%, and the least humid was 2022 at 66%.
July receives about 3.2 kWh/m²/day of solar energy in Port Denison. The sunniest Julys were 2012, 2019 and 2020, among others at 3.5 kWh/m²/day, and the cloudiest were 1984, 1996 and 2007 at 2.8.
Average wind speed in Port Denison during July is 3.8 m/s. The windiest July was 1996 at 4.9 m/s, while the calmest was 1994 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.8°C | 15.2°C | 15.6°C | 15.4°C | 16.1°C | +1.3°C |
| Avg High | 18.4°C | 18.5°C | 19.1°C | 19.1°C | 19.8°C | +1.4°C |
| Avg Low | 11.3°C | 11.9°C | 12.0°C | 11.8°C | 12.5°C | +1.2°C |
| Avg Rain | 96 mm | 97 mm | 91 mm | 76 mm | 65 mm | -31 mm |
July temperatures in Port Denison have risen by about 1.2°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 5.6°C (1990) to a record high of 25.6°C (2020).
Rainfall in July is a relatively wet time of year, averaging 86 mm, with a wettest year of 147 mm.
A quieter season to visit Port Denison
If your dates are flexible, the more temperate months of November and April tend to be the most comfortable for visiting Port Denison. That said, July — with days averaging 18.9°C and nights around 11.9°C (mean 15.4°C) and higher rainfall (86 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 | 18.6°C | 15.2°C | 11.7°C | 23.6°C | 7.1°C | 85 mm | 72% | 4 m/s | 3.1 |
| 2024 | 19.9°C | 16.5°C | 13.0°C | 23.4°C | 9.5°C | 119 mm | 71% | 3.8 m/s | 3.2 |
| 2023 | 19.6°C | 15.6°C | 11.7°C | 22.4°C | 7.9°C | 30 mm | 67% | 3.5 m/s | 3.4 |
| 2022 | 20.4°C | 16.4°C | 12.4°C | 24.5°C | 9.5°C | 51 mm | 66% | 3.5 m/s | 3.3 |
| 2021 | 18.8°C | 16.2°C | 13.7°C | 20.8°C | 9.9°C | 84 mm | 73% | 4.3 m/s | 3 |
| 2020 | 21.2°C | 16.7°C | 12.2°C | 25.6°C | 8.6°C | 20 mm | 66% | 3.8 m/s | 3.5 |
| 2019 | 19.6°C | 15.5°C | 11.4°C | 22.7°C | 9.5°C | 48 mm | 74% | 3.3 m/s | 3.5 |
| 2018 | 19.1°C | 16.0°C | 12.9°C | 22.2°C | 9.2°C | 111 mm | 74% | 3.8 m/s | 3 |
| 2017 | 19.2°C | 16.3°C | 13.4°C | 24.1°C | 9.7°C | 60 mm | 70% | 3.7 m/s | 3.1 |
| 2016 | 17.9°C | 14.3°C | 10.8°C | 21.7°C | 6.6°C | 91 mm | 75% | 4.1 m/s | 3.3 |
| 2015 | 20.0°C | 16.0°C | 12.1°C | 23.7°C | 7.2°C | 83 mm | 70% | 3.5 m/s | 3.1 |
| 2014 | 19.1°C | 15.8°C | 12.5°C | 23.8°C | 8.2°C | 75 mm | 73% | 3.5 m/s | 3.1 |
| 2013 | 19.1°C | 15.2°C | 11.3°C | 22.2°C | 7.1°C | 65 mm | 70% | 3.8 m/s | 3.3 |
| 2012 | 19.6°C | 15.0°C | 10.3°C | 23.7°C | 7.2°C | 69 mm | 67% | 3.7 m/s | 3.5 |
| 2011 | 18.8°C | 15.7°C | 12.6°C | 22.1°C | 8.3°C | 85 mm | 75% | 4 m/s | 3.1 |
| 2010 | 18.6°C | 14.6°C | 10.6°C | 20.8°C | 7.0°C | 70 mm | 69% | 3.6 m/s | 3.5 |
| 2009 | 18.1°C | 14.7°C | 11.3°C | 21.4°C | 7.1°C | 104 mm | 73% | 4 m/s | 3.3 |
| 2008 | 19.1°C | 15.6°C | 12.0°C | 23.5°C | 7.7°C | 147 mm | 73% | 4 m/s | 2.9 |
| 2007 🔥 | 20.4°C | 17.1°C | 13.7°C | 25.0°C | 9.7°C | 93 mm | 67% | 4.4 m/s | 2.8 |
| 2006 | 19.7°C | 15.4°C | 11.1°C | 24.4°C | 6.8°C | 65 mm | 67% | 3.6 m/s | 3.4 |
| 2005 | 19.0°C | 15.2°C | 11.3°C | 22.9°C | 6.2°C | 27 mm | 72% | 3.2 m/s | 3.5 |
| 2004 | 18.5°C | 15.0°C | 11.4°C | 20.8°C | 7.1°C | 66 mm | 72% | 3.8 m/s | 3.3 |
| 2003 | 18.1°C | 14.8°C | 11.4°C | 20.5°C | 7.5°C | 81 mm | 77% | 3.6 m/s | 3.2 |
| 2002 | 19.8°C | 16.5°C | 13.1°C | 24.1°C | 7.0°C | 76 mm | 71% | 3.9 m/s | 3.1 |
| 2001 | 19.7°C | 15.7°C | 11.6°C | 23.4°C | 7.6°C | 143 mm | 71% | 4 m/s | 3.3 |
| 2000 | 18.6°C | 16.0°C | 13.4°C | 20.2°C | 7.6°C | 108 mm | 72% | 4.1 m/s | 3.2 |
| 1999 | 18.7°C | 15.1°C | 11.6°C | 21.9°C | 8.3°C | 116 mm | 76% | 3.9 m/s | 3.2 |
| 1998 | 17.7°C | 14.2°C | 10.7°C | 20.5°C | 6.2°C | 114 mm | 78% | 3.8 m/s | 3 |
| 1997 | 19.0°C | 14.7°C | 10.5°C | 23.1°C | 5.8°C | 84 mm | 67% | 4.1 m/s | 3.3 |
| 1996 🌧️ | 19.1°C | 16.4°C | 13.7°C | 22.0°C | 9.2°C | 147 mm | 73% | 4.9 m/s | 2.8 |
| 1995 | 18.5°C | 15.8°C | 13.0°C | 21.6°C | 10.1°C | 146 mm | 73% | 4.2 m/s | 3.1 |
| 1994 | 19.2°C | 15.8°C | 12.5°C | 23.4°C | 7.5°C | 52 mm | 76% | 3.1 m/s | 3.4 |
| 1993 | 18.0°C | 14.5°C | 11.0°C | 21.6°C | 5.6°C | 76 mm | 74% | 4.2 m/s | 3.1 |
| 1992 | 19.6°C | 16.1°C | 12.6°C | 23.9°C | 8.1°C | 35 mm | 75% | 3.5 m/s | 3.1 |
| 1991 | 18.1°C | 15.2°C | 12.3°C | 21.2°C | 7.0°C | 123 mm | 77% | 4 m/s | 3 |
| 1990 | 17.5°C | 14.3°C | 11.1°C | 20.6°C | 5.6°C | 82 mm | 71% | 4.5 m/s | 3.3 |
| 1989 | 18.0°C | 14.7°C | 11.5°C | 20.0°C | 6.9°C | 72 mm | 73% | 3.4 m/s | 3 |
| 1988 | 18.8°C | 15.3°C | 11.8°C | 23.2°C | 7.1°C | 112 mm | 74% | 4.1 m/s | 3.1 |
| 1987 | 19.2°C | 15.7°C | 12.3°C | 23.9°C | 7.9°C | 108 mm | 75% | 3.6 m/s | 3.1 |
| 1986 ❄️ | 16.6°C | 13.5°C | 10.3°C | 19.0°C | 6.8°C | 132 mm | 75% | 4.1 m/s | 3.3 |
| 1985 | 19.8°C | 15.9°C | 12.1°C | 23.0°C | 7.4°C | 85 mm | 69% | 3.9 m/s | 3.2 |
| 1984 | 18.1°C | 14.6°C | 11.1°C | 21.5°C | 6.9°C | 61 mm | 74% | 4.1 m/s | 2.8 |
| 1983 | 18.5°C | 14.5°C | 10.5°C | 20.9°C | 6.2°C | 108 mm | 71% | 3.8 m/s | — |
| 1982 | 18.2°C | 14.4°C | 10.6°C | 21.7°C | 6.5°C | 63 mm | 72% | 3.4 m/s | — |
| 1981 | 18.1°C | 14.7°C | 11.4°C | 21.0°C | 7.6°C | 120 mm | 76% | 3.4 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 18.9°C with lows near 11.9°C (mean 15.4°C), based on 45 years of NASA POWER data.
July averages 86 mm of rainfall in Port Denison, a relatively wet time of year. The wettest on record was 147 mm in 1996.
The hottest July reached 25.6°C in 2020. The coldest dipped to 5.6°C in 1990.
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 18.5°C to 19.5°C and overnight lows from 11.1°C to 12.5°C over the same span.
July is one of the cooler months of the year in Port Denison and a relatively wet time of year, so plan for around 18.9°C daytime highs and 11.9°C at night.
Yes — July is the coldest month of the year in Port Denison, averaging 15.4°C.
For July in Port Denison, pack light layers you can adjust through the day, with typical highs of 18.9°C and lows of 11.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 72% — moderately humid.
Average wind speed in July is 3.8 m/s. The windiest July on record averaged 4.9 m/s (1996).
The wettest July on record was 1996 with 147 mm. On average, July sees 86 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 Port Denison 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.
