July is one of the warmer months of the year in Brentwood, with average highs near 31.6°C and lows around 20.9°C (mean 26.3°C). It is about average for rainfall, averaging 117 mm of rainfall and 73% relative humidity across the period.
July is one of the warmer months of the year in Brentwood. Across 45 years of records, the warmest July in Brentwood was 1986 — when the month averaged 29°C — while the coldest was 2009 at 23.4°C. Typical July days reach 31.6°C with nights near 20.9°C. The long-term July temperature trend is broadly flat.
July is about average for rainfall in Brentwood, averaging 117 mm of rainfall. The wettest July on record was 2013 with 193 mm, while the driest was 1997 at 40 mm.
Relative humidity in Brentwood during July averages 73%. The most humid July was 1989 at 84%, and the least humid was 2000 at 58%.
July receives about 6 kWh/m²/day of solar energy in Brentwood. The sunniest July was 2025 at 6.7 kWh/m²/day, and the cloudiest was 1998 at 5.2.
Average wind speed in Brentwood during July is 1.2 m/s. The windiest Julys were 2000 and 2005 at 1.5 m/s, while the calmest were 2017, 2020 and 2025, among others at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.2°C | 26.1°C | 26.0°C | 26.2°C | 27.0°C | +0.8°C |
| Avg High | 31.7°C | 31.4°C | 31.7°C | 31.2°C | 32.4°C | +0.7°C |
| Avg Low | 20.7°C | 20.8°C | 20.4°C | 21.2°C | 21.7°C | +1°C |
| Avg Rain | 114 mm | 103 mm | 108 mm | 131 mm | 133 mm | +19 mm |
July temperatures in Brentwood have risen by about 1.5°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 12.1°C (2009) to a record high of 41.5°C (1988).
Rainfall in July is about average for rainfall, averaging 117 mm, with a wettest year of 193 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Brentwood
July is a good time to visit Brentwood, with days averaging 31.6°C and nights around 20.9°C (mean 26.3°C, warmer than Brentwood's yearly average) and higher rainfall. September and June are marginally more temperate, but July still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 32.6°C | 27.5°C | 22.4°C | 36.7°C | 19.6°C | 82 mm | 76% | 1 m/s | 6.7 |
| 2024 | 33.3°C | 27.4°C | 21.5°C | 37.9°C | 16.9°C | 118 mm | 69% | 1.2 m/s | 5.6 |
| 2023 | 31.9°C | 26.5°C | 21.1°C | 36.4°C | 16.8°C | 147 mm | 73% | 1.2 m/s | 6.1 |
| 2022 | 34.5°C | 28.6°C | 22.7°C | 38.7°C | 20.4°C | 166 mm | 68% | 1.2 m/s | 6.2 |
| 2021 | 30.8°C | 25.7°C | 20.7°C | 35.5°C | 15.3°C | 131 mm | 77% | 1.3 m/s | 5.8 |
| 2020 | 31.4°C | 26.5°C | 21.5°C | 33.7°C | 18.9°C | 154 mm | 77% | 1 m/s | 6.6 |
| 2019 | 30.7°C | 25.9°C | 21.2°C | 33.0°C | 15.1°C | 134 mm | 79% | 1.1 m/s | 6.2 |
| 2018 | 30.7°C | 25.8°C | 20.9°C | 33.4°C | 17.0°C | 69 mm | 78% | 1.1 m/s | 6.3 |
| 2017 | 32.0°C | 26.7°C | 21.4°C | 36.5°C | 16.1°C | 149 mm | 74% | 1 m/s | 6.5 |
| 2016 | 32.0°C | 27.2°C | 22.3°C | 35.8°C | 19.0°C | 169 mm | 76% | 1.2 m/s | 6.1 |
| 2015 | 30.1°C | 25.9°C | 21.7°C | 33.7°C | 18.3°C | 163 mm | 83% | 1.2 m/s | 6 |
| 2014 | 29.9°C | 24.1°C | 18.4°C | 34.1°C | 13.2°C | 78 mm | 71% | 1.3 m/s | 6.5 |
| 2013 🌧️ | 28.2°C | 23.8°C | 19.3°C | 31.7°C | 13.4°C | 193 mm | 83% | 1.1 m/s | 5.7 |
| 2012 | 33.9°C | 28.2°C | 22.6°C | 41.4°C | 18.8°C | 174 mm | 68% | 1.1 m/s | 6.1 |
| 2011 | 32.4°C | 27.3°C | 22.2°C | 36.3°C | 16.2°C | 81 mm | 77% | 1 m/s | 6.2 |
| 2010 | 31.9°C | 26.9°C | 21.9°C | 36.1°C | 13.9°C | 105 mm | 75% | 1.1 m/s | 6.5 |
| 2009 ❄️ | 28.2°C | 23.4°C | 18.6°C | 31.0°C | 12.1°C | 170 mm | 79% | 1.4 m/s | 5.8 |
| 2008 | 32.2°C | 26.1°C | 20.0°C | 36.5°C | 15.4°C | 120 mm | 67% | 1.1 m/s | 6.1 |
| 2007 | 32.5°C | 26.3°C | 20.2°C | 35.1°C | 14.4°C | 72 mm | 65% | 1.3 m/s | 5.7 |
| 2006 | 33.7°C | 27.3°C | 20.9°C | 38.8°C | 14.3°C | 91 mm | 64% | 1.3 m/s | 6 |
| 2005 | 32.3°C | 26.9°C | 21.5°C | 36.7°C | 18.2°C | 116 mm | 71% | 1.5 m/s | 5.5 |
| 2004 | 29.0°C | 24.4°C | 19.9°C | 31.5°C | 13.4°C | 124 mm | 82% | 1.2 m/s | 5.9 |
| 2003 | 29.3°C | 24.7°C | 20.2°C | 33.2°C | 15.6°C | 122 mm | 81% | 1.3 m/s | 6 |
| 2002 | 32.6°C | 27.1°C | 21.6°C | 35.5°C | 16.9°C | 115 mm | 71% | 1.1 m/s | 5.9 |
| 2001 | 33.1°C | 26.9°C | 20.7°C | 36.0°C | 14.4°C | 85 mm | 65% | 1.3 m/s | 6 |
| 2000 | 34.2°C | 27.2°C | 20.1°C | 38.2°C | 15.9°C | 61 mm | 58% | 1.5 m/s | 6.3 |
| 1999 | 33.5°C | 27.6°C | 21.7°C | 40.3°C | 17.6°C | 82 mm | 68% | 1.1 m/s | 6.4 |
| 1998 | 29.7°C | 25.5°C | 21.3°C | 33.0°C | 19.1°C | 165 mm | 83% | 1.2 m/s | 5.2 |
| 1997 | 31.0°C | 25.6°C | 20.1°C | 36.7°C | 13.0°C | 40 mm | 73% | 1 m/s | 6.5 |
| 1996 | 30.8°C | 25.1°C | 19.4°C | 35.0°C | 14.6°C | 178 mm | 72% | 1.4 m/s | 5.5 |
| 1995 | 33.1°C | 27.1°C | 21.1°C | 37.2°C | 16.0°C | 88 mm | 68% | 1.3 m/s | 6.3 |
| 1994 | 28.6°C | 24.5°C | 20.4°C | 31.3°C | 14.6°C | 97 mm | 80% | 1.2 m/s | 5.5 |
| 1993 | 34.7°C | 28.6°C | 22.5°C | 39.2°C | 17.1°C | 61 mm | 66% | 1.2 m/s | 6.5 |
| 1992 | 30.4°C | 25.4°C | 20.4°C | 33.8°C | 17.4°C | 125 mm | 79% | 1.4 m/s | 5.7 |
| 1991 | 29.8°C | 25.3°C | 20.9°C | 32.2°C | 15.7°C | 93 mm | 81% | 1.1 m/s | 6.4 |
| 1990 | 32.0°C | 25.8°C | 19.7°C | 37.6°C | 14.2°C | 106 mm | 67% | 1.2 m/s | 5.9 |
| 1989 | 28.5°C | 24.5°C | 20.5°C | 31.7°C | 17.1°C | 162 mm | 84% | 1.2 m/s | 5.7 |
| 1988 | 33.9°C | 27.7°C | 21.6°C | 41.5°C | 18.4°C | 117 mm | 60% | 1.3 m/s | 5.6 |
| 1987 | 32.6°C | 26.7°C | 20.8°C | 37.3°C | 14.3°C | 102 mm | 69% | 1.1 m/s | 5.9 |
| 1986 🔥 | 35.8°C | 29.0°C | 22.2°C | 41.4°C | 16.3°C | 73 mm | 59% | 1.3 m/s | 6.4 |
| 1985 | 32.4°C | 26.3°C | 20.1°C | 36.7°C | 15.4°C | 86 mm | 67% | 1.3 m/s | 5.8 |
| 1984 | 29.3°C | 23.9°C | 18.5°C | 33.6°C | 14.2°C | 160 mm | 75% | 1.2 m/s | 5.6 |
| 1983 | 30.4°C | 25.6°C | 20.7°C | 34.1°C | 12.5°C | 46 mm | 75% | 1.1 m/s | — |
| 1982 | 30.7°C | 25.8°C | 20.9°C | 32.7°C | 16.8°C | 138 mm | 77% | 1.1 m/s | — |
| 1981 | 31.8°C | 26.5°C | 21.1°C | 35.5°C | 15.4°C | 142 mm | 74% | 1.2 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 31.6°C with lows near 20.9°C (mean 26.3°C), based on 45 years of NASA POWER data.
July averages 117 mm of rainfall in Brentwood, about average for rainfall. The wettest on record was 193 mm in 2013.
The hottest July reached 41.5°C in 1988. The coldest dipped to 12.1°C in 2009.
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 30.9°C to 32.6°C and overnight lows from 20.3°C to 21.7°C over the same span.
July is one of the warmer months of the year in Brentwood and about average for rainfall, so plan for around 31.6°C daytime highs and 20.9°C at night.
Not quite — July is the 12th coolest month in Brentwood, averaging 26.3°C.
For July in Brentwood, pack light, breathable clothing and sun protection, with typical highs of 31.6°C and lows of 20.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 73% — moderately humid.
Average wind speed in July is 1.2 m/s. The windiest July on record averaged 1.5 m/s (2000).
The wettest July on record was 2013 with 193 mm. On average, July sees 117 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 Brentwood 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.
