June is one of the warmer months of the year in Brentwood, with average highs near 28.8°C and lows around 18.5°C (mean 23.7°C). It is about average for rainfall, averaging 106 mm of rainfall and 77% relative humidity across the period.
June is one of the warmer months of the year in Brentwood. Across 45 years of records, the warmest June in Brentwood was 2007 — when the month averaged 25.8°C — while the coldest were 1982 and 1992 at 21.3°C. Typical June days reach 28.8°C with nights near 18.5°C. The long-term trend is warming, about 0.3°C per decade.
June is about average for rainfall in Brentwood, averaging 106 mm of rainfall. The wettest June on record was 1989 with 240 mm, while the driest was 1988 at 11 mm.
Relative humidity in Brentwood during June averages 77%. The most humid June was 1997 at 86%, and the least humid was 1988 at 48%.
June receives about 6.2 kWh/m²/day of solar energy in Brentwood. The sunniest June was 2012 at 7.2 kWh/m²/day, and the cloudiest was 1997 at 4.8.
Average wind speed in Brentwood during June is 1.3 m/s. The windiest June was 1998 at 1.6 m/s, while the calmest was 1991 at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.4°C | 23.2°C | 23.6°C | 24.3°C | 24.1°C | +0.7°C |
| Avg High | 28.8°C | 27.9°C | 28.9°C | 29.2°C | 29.4°C | +0.6°C |
| Avg Low | 18.0°C | 18.4°C | 18.3°C | 19.4°C | 18.7°C | +0.7°C |
| Avg Rain | 106 mm | 123 mm | 86 mm | 113 mm | 97 mm | -9 mm |
June temperatures in Brentwood have risen by about 1.4°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 8.1°C (1993) to a record high of 42.7°C (2012).
Rainfall in June is about average for rainfall, averaging 106 mm, with a wettest year of 240 mm.
One of the best times to visit Brentwood
June is one of the best times to visit Brentwood. Expect days averaging 28.8°C and nights around 18.5°C (mean 23.7°C) — warmer than Brentwood's yearly average — with higher rainfall (106 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 29.5°C | 24.7°C | 19.9°C | 35.4°C | 14.6°C | 155 mm | 81% | 1.2 m/s | 6 |
| 2024 | 30.1°C | 24.6°C | 19.1°C | 35.3°C | 11.9°C | 71 mm | 75% | 1.3 m/s | 6.7 |
| 2023 | 29.2°C | 23.2°C | 17.2°C | 35.1°C | 12.6°C | 72 mm | 71% | 1.3 m/s | 6.3 |
| 2022 | 30.7°C | 24.6°C | 18.5°C | 35.7°C | 12.8°C | 56 mm | 71% | 1.3 m/s | 7.1 |
| 2021 | 28.7°C | 24.0°C | 19.2°C | 32.9°C | 12.4°C | 119 mm | 81% | 1.5 m/s | 6.2 |
| 2020 | 28.3°C | 23.3°C | 18.4°C | 31.5°C | 10.7°C | 110 mm | 80% | 1.5 m/s | 6.3 |
| 2019 | 28.1°C | 23.3°C | 18.6°C | 31.5°C | 11.9°C | 177 mm | 81% | 1.4 m/s | 6.2 |
| 2018 | 29.4°C | 25.0°C | 20.6°C | 32.7°C | 14.7°C | 117 mm | 82% | 1.2 m/s | 6.4 |
| 2017 | 27.9°C | 23.0°C | 18.0°C | 30.9°C | 12.3°C | 121 mm | 78% | 1.4 m/s | 6.3 |
| 2016 | 30.1°C | 24.9°C | 19.8°C | 35.1°C | 12.7°C | 110 mm | 75% | 1.2 m/s | 7 |
| 2015 | 28.7°C | 24.2°C | 19.8°C | 31.7°C | 13.4°C | 95 mm | 81% | 1.3 m/s | 6.5 |
| 2014 | 28.0°C | 23.9°C | 19.8°C | 31.6°C | 13.2°C | 144 mm | 83% | 1.3 m/s | 5.7 |
| 2013 | 28.0°C | 23.4°C | 18.8°C | 31.5°C | 13.5°C | 113 mm | 82% | 1.4 m/s | 6.2 |
| 2012 | 32.1°C | 24.9°C | 17.7°C | 42.7°C | 10.5°C | 32 mm | 60% | 1.4 m/s | 7.2 |
| 2011 | 29.8°C | 24.8°C | 19.8°C | 33.1°C | 15.7°C | 132 mm | 81% | 1.3 m/s | 6.3 |
| 2010 | 30.3°C | 25.7°C | 21.2°C | 33.4°C | 15.0°C | 90 mm | 82% | 1.2 m/s | 6.6 |
| 2009 | 29.0°C | 24.2°C | 19.4°C | 32.4°C | 10.0°C | 79 mm | 82% | 1.3 m/s | 6.7 |
| 2008 | 29.2°C | 24.2°C | 19.1°C | 32.5°C | 12.9°C | 52 mm | 76% | 1.5 m/s | 6.9 |
| 2007 🔥 | 32.4°C | 25.8°C | 19.2°C | 36.3°C | 15.5°C | 72 mm | 60% | 1.3 m/s | 6.6 |
| 2006 | 28.8°C | 23.2°C | 17.7°C | 34.0°C | 12.7°C | 70 mm | 74% | 1.2 m/s | 6.7 |
| 2005 | 28.8°C | 23.6°C | 18.5°C | 35.2°C | 14.2°C | 97 mm | 77% | 1.3 m/s | 5.9 |
| 2004 | 27.5°C | 23.0°C | 18.6°C | 30.0°C | 12.9°C | 129 mm | 83% | 1.2 m/s | 5.4 |
| 2003 | 26.2°C | 21.4°C | 16.5°C | 30.4°C | 10.3°C | 145 mm | 81% | 1.3 m/s | 5.9 |
| 2002 | 29.4°C | 23.9°C | 18.4°C | 33.4°C | 13.9°C | 59 mm | 74% | 1.3 m/s | 6.6 |
| 2001 | 28.3°C | 22.4°C | 16.6°C | 32.5°C | 11.0°C | 98 mm | 73% | 1.3 m/s | 6.1 |
| 2000 | 29.6°C | 24.1°C | 18.5°C | 34.4°C | 8.3°C | 63 mm | 70% | 1.5 m/s | 6 |
| 1999 | 29.3°C | 24.0°C | 18.8°C | 33.2°C | 12.3°C | 122 mm | 73% | 1.5 m/s | 6 |
| 1998 | 28.9°C | 24.2°C | 19.5°C | 32.9°C | 9.7°C | 224 mm | 82% | 1.6 m/s | 6.6 |
| 1997 | 26.3°C | 22.2°C | 18.1°C | 31.6°C | 12.5°C | 174 mm | 86% | 1.4 m/s | 4.8 |
| 1996 | 28.0°C | 23.0°C | 17.9°C | 33.9°C | 13.6°C | 94 mm | 78% | 1.3 m/s | 6.1 |
| 1995 | 27.6°C | 22.7°C | 17.7°C | 30.4°C | 11.1°C | 97 mm | 79% | 1.2 m/s | 6.2 |
| 1994 | 28.6°C | 24.1°C | 19.6°C | 31.8°C | 16.1°C | 131 mm | 82% | 1.2 m/s | 5.9 |
| 1993 | 28.5°C | 23.5°C | 18.5°C | 31.1°C | 8.1°C | 82 mm | 79% | 1.3 m/s | 6.1 |
| 1992 | 26.1°C | 21.3°C | 16.5°C | 30.2°C | 9.0°C | 146 mm | 81% | 1.3 m/s | 5.4 |
| 1991 | 27.3°C | 23.3°C | 19.3°C | 30.9°C | 13.6°C | 89 mm | 84% | 1.1 m/s | 5.8 |
| 1990 | 28.8°C | 23.2°C | 17.6°C | 34.1°C | 9.1°C | 70 mm | 77% | 1.5 m/s | 6.9 |
| 1989 🌧️ | 26.5°C | 22.3°C | 18.2°C | 31.3°C | 12.3°C | 240 mm | 85% | 1.3 m/s | 5.1 |
| 1988 | 33.6°C | 25.6°C | 17.7°C | 40.1°C | 8.8°C | 11 mm | 48% | 1.3 m/s | 6.7 |
| 1987 | 29.7°C | 24.3°C | 19.0°C | 33.1°C | 11.8°C | 98 mm | 73% | 1.3 m/s | 6.2 |
| 1986 | 29.7°C | 24.3°C | 18.9°C | 35.1°C | 12.8°C | 102 mm | 75% | 1.2 m/s | 6 |
| 1985 | 28.7°C | 23.3°C | 17.8°C | 32.4°C | 8.2°C | 108 mm | 74% | 1.3 m/s | 6.1 |
| 1984 | 28.8°C | 23.8°C | 18.8°C | 32.6°C | 9.1°C | 67 mm | 79% | 1.2 m/s | 6.3 |
| 1983 | 26.5°C | 21.6°C | 16.7°C | 30.3°C | 10.8°C | 118 mm | 81% | 1.3 m/s | — |
| 1982 ❄️ | 26.7°C | 21.3°C | 15.8°C | 30.8°C | 11.1°C | 55 mm | 79% | 1.3 m/s | — |
| 1981 | 29.3°C | 24.1°C | 18.9°C | 34.6°C | 14.5°C | 154 mm | 79% | 1.5 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 28.8°C with lows near 18.5°C (mean 23.7°C), based on 45 years of NASA POWER data.
June averages 106 mm of rainfall in Brentwood, about average for rainfall. The wettest on record was 240 mm in 1989.
The hottest June reached 42.7°C in 2012. The coldest dipped to 8.1°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 1.4°C. Daytime highs moved from 28°C to 29.6°C and overnight lows from 17.6°C to 18.8°C over the same span.
June is one of the warmer months of the year in Brentwood and about average for rainfall, so plan for around 28.8°C daytime highs and 18.5°C at night.
Not quite — June is the 10th coolest month in Brentwood, averaging 23.7°C.
For June in Brentwood, pack light layers you can adjust through the day, with typical highs of 28.8°C and lows of 18.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 77% — quite humid.
Average wind speed in June is 1.3 m/s. The windiest June on record averaged 1.6 m/s (1998).
The wettest June on record was 1989 with 240 mm. On average, June sees 106 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 June, 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 June specifically, along with year-by-year records and how the month has changed over the decades.
