October is one of the warmer months of the year in Brentwood, with average highs near 22.5°C and lows around 9.6°C (mean 16.1°C). It is one of the drier months, averaging 87 mm of rainfall and 70% relative humidity across the period.
October is one of the warmer months of the year in Brentwood. Across 45 years of records, the warmest October in Brentwood was 2016 — when the month averaged 19.9°C — while the coldest was 1988 at 12°C. Typical October days reach 22.5°C with nights near 9.6°C. The long-term trend is warming, about 0.3°C per decade.
October is one of the drier months in Brentwood, averaging 87 mm of rainfall. The wettest October on record was 1984 with 206 mm, while the driest was 2005 at 3 mm.
Relative humidity in Brentwood during October averages 70%. The most humid October was 2002 at 84%, and the least humid was 2010 at 55%.
October receives about 3.7 kWh/m²/day of solar energy in Brentwood. The sunniest October was 2010 at 4.6 kWh/m²/day, and the cloudiest was 2002 at 2.6.
Average wind speed in Brentwood during October is 1.6 m/s. The windiest October was 2001 at 2 m/s, while the calmest were 2008, 2013 and 2024, among others at 1.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.5°C | 15.5°C | 16.0°C | 16.4°C | 16.8°C | +1.3°C |
| Avg High | 21.9°C | 22.2°C | 22.3°C | 22.8°C | 23.4°C | +1.5°C |
| Avg Low | 9.2°C | 8.8°C | 9.7°C | 9.9°C | 10.3°C | +1.1°C |
| Avg Rain | 84 mm | 81 mm | 92 mm | 97 mm | 77 mm | -8 mm |
October temperatures in Brentwood have stayed relatively stable across the record.
October has ranged from a record low of -4.3°C (1981) to a record high of 37.8°C (2019).
Rainfall in October is one of the drier months, averaging 87 mm, with a wettest year of 206 mm.
A good time to visit Brentwood
October is a good time to visit Brentwood, with days averaging 22.5°C and nights around 9.6°C (mean 16.1°C, warmer than Brentwood's yearly average) and higher rainfall. September and June are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 23.8°C | 17.4°C | 10.9°C | 30.4°C | 3.8°C | 99 mm | 68% | 1.5 m/s | 3.9 |
| 2024 | 25.1°C | 17.7°C | 10.3°C | 30.7°C | 2.2°C | 13 mm | 64% | 1.4 m/s | 4.4 |
| 2023 | 24.3°C | 17.5°C | 10.7°C | 31.9°C | -2.2°C | 26 mm | 63% | 1.6 m/s | 3.7 |
| 2022 | 22.7°C | 15.1°C | 7.5°C | 28.6°C | -1.0°C | 47 mm | 59% | 1.7 m/s | 4.3 |
| 2021 | 22.6°C | 17.5°C | 12.5°C | 27.7°C | 4.7°C | 135 mm | 82% | 1.5 m/s | 3.6 |
| 2020 | 21.8°C | 15.9°C | 10.0°C | 27.7°C | 3.1°C | 140 mm | 78% | 1.5 m/s | 3.7 |
| 2019 | 24.1°C | 17.4°C | 10.7°C | 37.8°C | -1.5°C | 191 mm | 69% | 1.5 m/s | 3.5 |
| 2018 | 21.8°C | 16.2°C | 10.6°C | 30.8°C | 0.5°C | 91 mm | 78% | 1.5 m/s | 3.6 |
| 2017 | 22.7°C | 16.1°C | 9.6°C | 30.0°C | -0.8°C | 119 mm | 73% | 1.6 m/s | 4 |
| 2016 🔥 | 27.2°C | 19.9°C | 12.7°C | 32.6°C | 5.0°C | 11 mm | 62% | 1.6 m/s | 4.3 |
| 2015 | 22.7°C | 16.5°C | 10.2°C | 30.1°C | 1.9°C | 105 mm | 72% | 1.7 m/s | 3.6 |
| 2014 | 22.0°C | 16.1°C | 10.3°C | 32.0°C | 2.7°C | 199 mm | 78% | 1.7 m/s | 3.7 |
| 2013 | 22.0°C | 16.1°C | 10.3°C | 30.6°C | -2.9°C | 58 mm | 75% | 1.4 m/s | 3.5 |
| 2012 | 19.5°C | 13.7°C | 7.9°C | 26.2°C | -0.6°C | 95 mm | 76% | 1.8 m/s | 3.7 |
| 2011 | 21.8°C | 14.9°C | 7.9°C | 28.7°C | 0.5°C | 39 mm | 66% | 1.5 m/s | 4.1 |
| 2010 | 24.7°C | 16.9°C | 9.1°C | 31.4°C | 1.3°C | 62 mm | 55% | 1.6 m/s | 4.6 |
| 2009 | 18.8°C | 13.5°C | 8.3°C | 26.4°C | 0.5°C | 177 mm | 83% | 1.8 m/s | 2.9 |
| 2008 | 22.4°C | 15.8°C | 9.1°C | 30.3°C | -1.1°C | 108 mm | 65% | 1.4 m/s | 4.2 |
| 2007 | 24.9°C | 18.4°C | 12.0°C | 33.1°C | 1.7°C | 127 mm | 68% | 1.7 m/s | 3.8 |
| 2006 | 20.7°C | 14.1°C | 7.6°C | 31.5°C | -1.7°C | 79 mm | 71% | 1.7 m/s | 3.7 |
| 2005 | 23.7°C | 16.7°C | 9.7°C | 32.3°C | 0.2°C | 3 mm | 67% | 1.5 m/s | 3.8 |
| 2004 | 23.5°C | 17.9°C | 12.4°C | 28.7°C | 5.2°C | 131 mm | 77% | 1.6 m/s | 3.2 |
| 2003 | 21.6°C | 15.4°C | 9.2°C | 26.0°C | 2.9°C | 42 mm | 73% | 1.4 m/s | 3.8 |
| 2002 | 20.5°C | 15.7°C | 11.0°C | 29.4°C | 4.4°C | 118 mm | 84% | 1.5 m/s | 2.6 |
| 2001 | 21.4°C | 14.4°C | 7.4°C | 28.5°C | -1.8°C | 124 mm | 67% | 2 m/s | 4.4 |
| 2000 | 25.7°C | 18.3°C | 10.8°C | 32.3°C | -0.5°C | 10 mm | 59% | 1.4 m/s | 4 |
| 1999 | 23.5°C | 16.0°C | 8.5°C | 29.2°C | 0.1°C | 56 mm | 62% | 1.6 m/s | 4.2 |
| 1998 | 25.1°C | 18.0°C | 10.9°C | 31.3°C | 1.6°C | 58 mm | 62% | 1.5 m/s | 4 |
| 1997 | 21.7°C | 15.0°C | 8.3°C | 30.0°C | -2.0°C | 66 mm | 70% | 1.5 m/s | 4 |
| 1996 | 21.5°C | 15.2°C | 9.0°C | 26.5°C | 1.6°C | 71 mm | 74% | 1.6 m/s | 3.7 |
| 1995 | 20.8°C | 14.5°C | 8.3°C | 28.3°C | 1.6°C | 148 mm | 76% | 1.6 m/s | 3.9 |
| 1994 | 21.6°C | 15.5°C | 9.4°C | 28.2°C | -0.2°C | 91 mm | 75% | 1.5 m/s | 3.3 |
| 1993 | 21.4°C | 14.8°C | 8.2°C | 30.4°C | -2.5°C | 56 mm | 70% | 1.7 m/s | 3.1 |
| 1992 | 21.7°C | 14.9°C | 8.0°C | 27.5°C | -1.3°C | 51 mm | 72% | 1.5 m/s | 3.4 |
| 1991 | 22.4°C | 16.0°C | 9.7°C | 29.1°C | 0.1°C | 103 mm | 69% | 1.6 m/s | 4 |
| 1990 | 22.5°C | 15.3°C | 8.0°C | 29.9°C | 0.1°C | 111 mm | 68% | 1.7 m/s | 3.9 |
| 1989 | 20.6°C | 14.3°C | 8.0°C | 26.9°C | -0.4°C | 81 mm | 79% | 1.5 m/s | 3.8 |
| 1988 ❄️ | 18.5°C | 12.0°C | 5.6°C | 24.0°C | -0.5°C | 56 mm | 68% | 1.7 m/s | 3.4 |
| 1987 | 20.4°C | 12.8°C | 5.3°C | 27.3°C | -1.9°C | 13 mm | 56% | 1.6 m/s | 4.1 |
| 1986 | 22.6°C | 16.5°C | 10.3°C | 31.2°C | 3.3°C | 83 mm | 73% | 1.4 m/s | 3.4 |
| 1985 | 23.3°C | 17.6°C | 11.9°C | 29.2°C | 4.1°C | 71 mm | 76% | 1.6 m/s | 2.9 |
| 1984 🌧️ | 24.4°C | 19.1°C | 13.9°C | 28.8°C | 4.7°C | 206 mm | 76% | 1.5 m/s | 2.9 |
| 1983 | 23.6°C | 17.0°C | 10.4°C | 31.2°C | 3.0°C | 98 mm | 68% | 1.5 m/s | — |
| 1982 | 22.1°C | 15.7°C | 9.2°C | 30.1°C | -0.9°C | 52 mm | 71% | 1.5 m/s | — |
| 1981 | 21.2°C | 14.8°C | 8.4°C | 31.1°C | -4.3°C | 100 mm | 69% | 1.6 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 22.5°C with lows near 9.6°C (mean 16.1°C), based on 45 years of NASA POWER data.
October averages 87 mm of rainfall in Brentwood, one of the drier months. The wettest on record was 206 mm in 1984.
The hottest October reached 37.8°C in 2019. The coldest dipped to -4.3°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 0.2°C — but days and nights have moved in opposite directions. Daytime highs rose from 22.9°C to 23.7°C while overnight lows fell from 10.8°C to 10.4°C, widening the gap between day and night.
October is one of the warmer months of the year in Brentwood and one of the drier months, so plan for around 22.5°C daytime highs and 9.6°C at night.
Not quite — October is the 7th coolest month in Brentwood, averaging 16.1°C.
For October in Brentwood, pack light layers you can adjust through the day, with typical highs of 22.5°C and lows of 9.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 70% — moderately humid.
Average wind speed in October is 1.6 m/s. The windiest October on record averaged 2 m/s (2001).
The wettest October on record was 1984 with 206 mm. On average, October sees 87 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 October, 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 October specifically, along with year-by-year records and how the month has changed over the decades.
