July is one of the cooler months of the year in Tumby Bay, with average highs near 14.7°C and lows around 11.5°C (mean 13.1°C). It is a relatively wet time of year, averaging 60 mm of rainfall and 76% relative humidity across the period.
July is one of the cooler months of the year in Tumby Bay. Across 45 years of records, the warmest July in Tumby Bay was 2017 — when the month averaged 13.9°C — while the coldest was 1982 at 11.8°C. Typical July days reach 14.7°C with nights near 11.5°C. The long-term trend is warming, about 0.2°C per decade.
July is a relatively wet time of year in Tumby Bay, averaging 60 mm of rainfall. The wettest July on record was 1995 with 133 mm, while the driest was 2019 at 10 mm.
Relative humidity in Tumby Bay during July averages 76%. The most humid July was 1996 at 79%, and the least humid was 2018 at 70%.
July receives about 2.6 kWh/m²/day of solar energy in Tumby Bay. The sunniest July was 1994 at 2.9 kWh/m²/day, and the cloudiest was 1984 at 2.
Average wind speed in Tumby Bay during July is 5.7 m/s. The windiest Julys were 1995 and 2021 at 6.7 m/s, while the calmest was 2001 at 4.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.6°C | 13.0°C | 13.2°C | 13.3°C | 13.3°C | +0.7°C |
| Avg High | 14.2°C | 14.6°C | 14.8°C | 14.9°C | 14.9°C | +0.7°C |
| Avg Low | 11.1°C | 11.4°C | 11.6°C | 11.7°C | 11.6°C | +0.5°C |
| Avg Rain | 82 mm | 72 mm | 63 mm | 42 mm | 33 mm | -49 mm |
July temperatures in Tumby Bay have risen by about 0.9°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 7.3°C (1989) to a record high of 20.6°C (2016).
Rainfall in July is a relatively wet time of year, averaging 60 mm, with a wettest year of 133 mm.
A quieter season to visit Tumby Bay
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Tumby Bay. That said, July — with days averaging 14.7°C and nights around 11.5°C (mean 13.1°C) and moderate rainfall (60 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 | 14.8°C | 13.3°C | 11.7°C | 17.6°C | 9.7°C | 48 mm | 73% | 6.2 m/s | 2.5 |
| 2024 | 14.9°C | 13.2°C | 11.6°C | 19.8°C | 8.9°C | 20 mm | 74% | 5.9 m/s | 2.7 |
| 2023 | 15.5°C | 13.7°C | 12.0°C | 19.0°C | 10.0°C | 14 mm | 75% | 5.4 m/s | 2.6 |
| 2022 | 14.5°C | 13.1°C | 11.7°C | 18.1°C | 9.7°C | 20 mm | 75% | 5.2 m/s | 2.4 |
| 2021 | 14.9°C | 13.1°C | 11.3°C | 18.3°C | 8.8°C | 74 mm | 76% | 6.7 m/s | 2.5 |
| 2020 | 14.7°C | 13.1°C | 11.5°C | 18.3°C | 9.1°C | 20 mm | 77% | 4.5 m/s | 2.7 |
| 2019 | 15.4°C | 13.7°C | 12.0°C | 20.1°C | 10.0°C | 10 mm | 77% | 5.4 m/s | 2.6 |
| 2018 | 15.7°C | 13.8°C | 11.9°C | 18.4°C | 9.6°C | 18 mm | 70% | 6.2 m/s | 2.6 |
| 2017 🔥 | 15.7°C | 13.9°C | 12.1°C | 18.6°C | 9.7°C | 23 mm | 72% | 6.3 m/s | 2.7 |
| 2016 | 14.8°C | 13.1°C | 11.3°C | 20.6°C | 8.6°C | 34 mm | 75% | 6.2 m/s | 2.4 |
| 2015 | 14.3°C | 12.7°C | 11.1°C | 16.6°C | 8.6°C | 19 mm | 74% | 5.7 m/s | 2.5 |
| 2014 | 14.6°C | 13.1°C | 11.5°C | 17.2°C | 9.6°C | 65 mm | 78% | 6.3 m/s | 2.4 |
| 2013 | 15.4°C | 13.7°C | 12.0°C | 18.0°C | 9.6°C | 89 mm | 77% | 6 m/s | 2.5 |
| 2012 | 14.0°C | 12.7°C | 11.4°C | 16.2°C | 8.5°C | 44 mm | 77% | 4.7 m/s | 2.6 |
| 2011 | 14.6°C | 13.2°C | 11.8°C | 18.7°C | 9.5°C | 61 mm | 75% | 5.4 m/s | 2.5 |
| 2010 | 14.5°C | 13.0°C | 11.5°C | 16.5°C | 9.7°C | 51 mm | 77% | 4.8 m/s | 2.6 |
| 2009 | 15.3°C | 13.7°C | 12.2°C | 17.2°C | 9.0°C | 81 mm | 77% | 6.4 m/s | 2.7 |
| 2008 | 14.5°C | 13.0°C | 11.5°C | 17.6°C | 8.0°C | 77 mm | 75% | 6.5 m/s | 2.4 |
| 2007 | 14.8°C | 13.2°C | 11.5°C | 18.6°C | 9.1°C | 49 mm | 75% | 5.8 m/s | 2.5 |
| 2006 | 14.3°C | 12.8°C | 11.3°C | 16.9°C | 9.4°C | 61 mm | 77% | 5.8 m/s | 2.4 |
| 2005 | 14.8°C | 13.2°C | 11.7°C | 18.0°C | 9.4°C | 59 mm | 77% | 5 m/s | 2.5 |
| 2004 | 14.2°C | 12.9°C | 11.5°C | 17.6°C | 10.2°C | 91 mm | 77% | 5.8 m/s | 2.4 |
| 2003 | 14.6°C | 12.8°C | 11.0°C | 18.2°C | 8.8°C | 44 mm | 75% | 5.7 m/s | 2.7 |
| 2002 | 15.9°C | 13.8°C | 11.7°C | 19.0°C | 8.6°C | 44 mm | 74% | 6.3 m/s | 2.7 |
| 2001 | 15.0°C | 13.7°C | 12.4°C | 18.6°C | 10.9°C | 52 mm | 77% | 4.3 m/s | 2.6 |
| 2000 | 15.0°C | 13.2°C | 11.4°C | 18.5°C | 9.6°C | 73 mm | 77% | 6.2 m/s | 2.7 |
| 1999 | 15.3°C | 13.7°C | 12.0°C | 19.1°C | 9.1°C | 34 mm | 75% | 5 m/s | 2.6 |
| 1998 | 13.7°C | 12.4°C | 11.0°C | 16.6°C | 9.2°C | 77 mm | 76% | 5.3 m/s | 2.5 |
| 1997 | 13.7°C | 12.5°C | 11.2°C | 18.0°C | 9.5°C | 36 mm | 72% | 4.6 m/s | 2.7 |
| 1996 | 14.6°C | 13.0°C | 11.5°C | 17.5°C | 9.1°C | 117 mm | 79% | 6.1 m/s | 2.5 |
| 1995 🌧️ | 14.1°C | 12.6°C | 11.2°C | 15.9°C | 8.9°C | 133 mm | 77% | 6.7 m/s | 2.5 |
| 1994 | 15.7°C | 13.4°C | 11.1°C | 18.6°C | 9.2°C | 37 mm | 73% | 5 m/s | 2.9 |
| 1993 | 14.7°C | 13.0°C | 11.3°C | 18.7°C | 9.4°C | 56 mm | 77% | 5.9 m/s | 2.5 |
| 1992 | 15.1°C | 13.4°C | 11.7°C | 17.8°C | 9.4°C | 50 mm | 77% | 5.7 m/s | 2.7 |
| 1991 | 14.5°C | 13.1°C | 11.7°C | 17.2°C | 9.6°C | 71 mm | 76% | 5.3 m/s | 2.6 |
| 1990 | 14.4°C | 12.9°C | 11.3°C | 18.3°C | 9.1°C | 112 mm | 77% | 6.4 m/s | 2.6 |
| 1989 | 13.6°C | 12.2°C | 10.8°C | 16.3°C | 7.3°C | 118 mm | 77% | 6 m/s | 2.6 |
| 1988 | 15.1°C | 13.6°C | 12.0°C | 17.3°C | 10.1°C | 61 mm | 75% | 6.1 m/s | 2.7 |
| 1987 | 14.5°C | 12.9°C | 11.2°C | 18.1°C | 9.0°C | 74 mm | 76% | 5.7 m/s | 2.5 |
| 1986 | 14.0°C | 12.6°C | 11.2°C | 16.9°C | 8.8°C | 126 mm | 76% | 6 m/s | 2.6 |
| 1985 | 14.8°C | 13.4°C | 12.0°C | 18.9°C | 10.3°C | 30 mm | 72% | 5.5 m/s | 2.6 |
| 1984 | 13.6°C | 12.1°C | 10.7°C | 17.0°C | 8.5°C | 103 mm | 78% | 5.6 m/s | 2 |
| 1983 | 13.7°C | 12.1°C | 10.6°C | 15.9°C | 7.5°C | 112 mm | 78% | 6.2 m/s | — |
| 1982 ❄️ | 13.5°C | 11.8°C | 10.1°C | 16.0°C | 7.6°C | 43 mm | 74% | 4.7 m/s | — |
| 1981 | 14.7°C | 12.8°C | 11.0°C | 17.4°C | 8.7°C | 70 mm | 75% | 6.4 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 14.7°C with lows near 11.5°C (mean 13.1°C), based on 45 years of NASA POWER data.
July averages 60 mm of rainfall in Tumby Bay, a relatively wet time of year. The wettest on record was 133 mm in 1995.
The hottest July reached 20.6°C in 2016. The coldest dipped to 7.3°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 0.9°C. Daytime highs moved from 14.1°C to 14.9°C and overnight lows from 10.9°C to 11.7°C over the same span.
July is one of the cooler months of the year in Tumby Bay and a relatively wet time of year, so plan for around 14.7°C daytime highs and 11.5°C at night.
Yes — July is the coldest month of the year in Tumby Bay, averaging 13.1°C.
For July in Tumby Bay, pack light layers you can adjust through the day, with typical highs of 14.7°C and lows of 11.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 76% — quite humid.
Average wind speed in July is 5.7 m/s. The windiest July on record averaged 6.7 m/s (1995).
The wettest July on record was 1995 with 133 mm. On average, July sees 60 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 Tumby Bay 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.
