October is one of the cooler months of the year in Horsham, with average highs near 21.5°C and lows around 7.2°C (mean 14.4°C). It is about average for rainfall, averaging 42 mm of rainfall and 66% relative humidity across the period.
October is one of the cooler months of the year in Horsham. Across 45 years of records, the warmest October in Horsham was 2015 — when the month averaged 19.5°C — while the coldest was 1986 at 11.9°C. Typical October days reach 21.5°C with nights near 7.2°C. The long-term trend is warming, about 0.4°C per decade.
October is about average for rainfall in Horsham, averaging 42 mm of rainfall. The wettest October on record was 2022 with 169 mm, while the driest was 2006 at 3 mm.
Relative humidity in Horsham during October averages 66%. The most humid October was 2022 at 80%, and the least humid was 2015 at 49%.
October receives about 5.9 kWh/m²/day of solar energy in Horsham. The sunniest October was 2006 at 7 kWh/m²/day, and the cloudiest was 2022 at 4.8.
Average wind speed in Horsham during October is 3.1 m/s. The windiest October was 1988 at 3.9 m/s, while the calmest was 1983 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.6°C | 14.1°C | 14.4°C | 15.3°C | 14.4°C | +0.8°C |
| Avg High | 20.6°C | 21.2°C | 21.7°C | 22.9°C | 21.0°C | +0.4°C |
| Avg Low | 6.6°C | 7.1°C | 7.0°C | 7.8°C | 7.7°C | +1.1°C |
| Avg Rain | 42 mm | 43 mm | 30 mm | 30 mm | 78 mm | +36 mm |
October temperatures in Horsham have risen by about 0.5°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 0.8°C (1986) to a record high of 35.9°C (2015).
Rainfall in October is about average for rainfall, averaging 42 mm, with a wettest year of 169 mm.
A good time to visit Horsham
October is a good time to visit Horsham, with days averaging 21.5°C and nights around 7.2°C (mean 14.4°C, cooler than Horsham's yearly average) and moderate rainfall. February and January 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 | 21.7°C | 14.8°C | 8.0°C | 32.7°C | 3.3°C | 68 mm | 67% | 3.1 m/s | 5.7 |
| 2024 | 23.9°C | 16.2°C | 8.6°C | 29.8°C | 3.2°C | 38 mm | 62% | 3 m/s | 6.2 |
| 2023 | 21.6°C | 14.3°C | 6.9°C | 31.3°C | 3.4°C | 41 mm | 63% | 3.2 m/s | 6.2 |
| 2022 🌧️ | 19.0°C | 13.8°C | 8.6°C | 24.1°C | 3.2°C | 169 mm | 80% | 2.9 m/s | 4.8 |
| 2021 | 19.8°C | 13.2°C | 6.6°C | 29.7°C | 2.5°C | 67 mm | 72% | 2.8 m/s | 5.9 |
| 2020 | 20.2°C | 13.9°C | 7.5°C | 28.1°C | 4.3°C | 85 mm | 75% | 2.8 m/s | 5.2 |
| 2019 | 23.3°C | 15.4°C | 7.6°C | 34.5°C | 2.6°C | 24 mm | 61% | 2.8 m/s | 6.2 |
| 2018 | 23.4°C | 15.9°C | 8.3°C | 30.2°C | 4.2°C | 34 mm | 62% | 2.9 m/s | 5.9 |
| 2017 | 22.9°C | 15.3°C | 7.7°C | 31.5°C | 3.8°C | 37 mm | 66% | 2.9 m/s | 6.1 |
| 2016 | 19.6°C | 12.7°C | 5.8°C | 28.1°C | 1.9°C | 39 mm | 67% | 3.7 m/s | 5.8 |
| 2015 🔥 | 28.4°C | 19.5°C | 10.7°C | 35.9°C | 5.6°C | 5 mm | 49% | 2.8 m/s | 6.3 |
| 2014 | 25.4°C | 17.0°C | 8.7°C | 35.5°C | 3.5°C | 12 mm | 58% | 3 m/s | 6.3 |
| 2013 | 20.9°C | 13.8°C | 6.7°C | 32.3°C | 3.0°C | 37 mm | 68% | 3.4 m/s | 5.6 |
| 2012 | 22.1°C | 14.6°C | 7.0°C | 32.6°C | 3.2°C | 20 mm | 63% | 2.8 m/s | 6 |
| 2011 | 22.1°C | 15.1°C | 8.1°C | 31.2°C | 2.8°C | 30 mm | 67% | 2.8 m/s | 5.5 |
| 2010 | 20.5°C | 13.7°C | 7.0°C | 29.4°C | 2.6°C | 61 mm | 73% | 2.8 m/s | 5.8 |
| 2009 | 21.3°C | 14.3°C | 7.2°C | 35.0°C | 2.6°C | 21 mm | 67% | 3 m/s | 5.9 |
| 2008 | 24.2°C | 16.0°C | 7.8°C | 34.6°C | 2.2°C | 9 mm | 57% | 2.8 m/s | 6.2 |
| 2007 | 22.7°C | 14.9°C | 7.1°C | 35.7°C | 2.5°C | 11 mm | 60% | 3.2 m/s | 6 |
| 2006 | 24.3°C | 15.4°C | 6.4°C | 35.6°C | 2.2°C | 3 mm | 50% | 3 m/s | 7 |
| 2005 | 21.2°C | 14.5°C | 7.8°C | 27.6°C | 3.0°C | 70 mm | 68% | 2.8 m/s | 5.6 |
| 2004 | 23.4°C | 15.5°C | 7.5°C | 35.3°C | 3.5°C | 11 mm | 62% | 2.9 m/s | 6.3 |
| 2003 | 18.5°C | 12.0°C | 5.5°C | 29.8°C | 1.0°C | 58 mm | 72% | 2.9 m/s | 5.6 |
| 2002 | 22.6°C | 14.9°C | 7.2°C | 32.3°C | 2.7°C | 20 mm | 60% | 3.4 m/s | 5.9 |
| 2001 | 18.6°C | 12.6°C | 6.5°C | 26.1°C | 1.7°C | 50 mm | 72% | 3.3 m/s | 5 |
| 2000 | 20.3°C | 13.5°C | 6.7°C | 28.5°C | 2.5°C | 52 mm | 70% | 3 m/s | 5.7 |
| 1999 | 22.8°C | 15.4°C | 8.1°C | 29.8°C | 3.6°C | 46 mm | 65% | 2.8 m/s | 5.9 |
| 1998 | 20.1°C | 13.5°C | 6.9°C | 33.2°C | 2.0°C | 53 mm | 67% | 3.1 m/s | 5.6 |
| 1997 | 22.6°C | 14.9°C | 7.2°C | 32.9°C | 2.2°C | 40 mm | 63% | 3.1 m/s | 5.9 |
| 1996 | 20.5°C | 13.5°C | 6.5°C | 29.5°C | 1.3°C | 19 mm | 71% | 3 m/s | 6.3 |
| 1995 | 19.4°C | 12.9°C | 6.3°C | 31.2°C | 1.7°C | 64 mm | 72% | 3.1 m/s | 5.6 |
| 1994 | 22.5°C | 14.7°C | 6.8°C | 33.0°C | 3.5°C | 36 mm | 61% | 3.1 m/s | 6.1 |
| 1993 | 19.7°C | 13.0°C | 6.2°C | 25.2°C | 1.1°C | 59 mm | 69% | 3.1 m/s | 5.9 |
| 1992 | 19.7°C | 13.6°C | 7.6°C | 27.1°C | 2.2°C | 78 mm | 77% | 2.8 m/s | 5.7 |
| 1991 | 22.3°C | 15.0°C | 7.8°C | 30.7°C | 2.9°C | 4 mm | 68% | 3 m/s | 6.4 |
| 1990 | 22.4°C | 14.9°C | 7.4°C | 35.6°C | 1.5°C | 28 mm | 65% | 3.1 m/s | 6 |
| 1989 | 19.3°C | 12.9°C | 6.4°C | 26.3°C | 1.4°C | 50 mm | 72% | 3.5 m/s | 5.8 |
| 1988 | 21.3°C | 14.4°C | 7.4°C | 31.5°C | 4.4°C | 26 mm | 67% | 3.9 m/s | 6 |
| 1987 | 20.7°C | 13.5°C | 6.3°C | 33.6°C | 1.0°C | 52 mm | 67% | 3.1 m/s | 6 |
| 1986 ❄️ | 17.8°C | 11.9°C | 5.9°C | 25.0°C | 0.8°C | 84 mm | 74% | 3.4 m/s | 5.3 |
| 1985 | 21.8°C | 14.5°C | 7.2°C | 28.3°C | 2.3°C | 61 mm | 65% | 3.3 m/s | 5.9 |
| 1984 | 21.7°C | 14.0°C | 6.3°C | 29.1°C | 1.6°C | 13 mm | 64% | 3.1 m/s | 6.3 |
| 1983 | 19.7°C | 13.4°C | 7.1°C | 25.6°C | 2.3°C | 41 mm | 74% | 2.6 m/s | — |
| 1982 | 22.7°C | 14.6°C | 6.6°C | 33.5°C | 1.7°C | 10 mm | 53% | 3.3 m/s | — |
| 1981 | 20.4°C | 13.4°C | 6.3°C | 28.2°C | 3.0°C | 44 mm | 71% | 2.9 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 21.5°C with lows near 7.2°C (mean 14.4°C), based on 45 years of NASA POWER data.
October averages 42 mm of rainfall in Horsham, about average for rainfall. The wettest on record was 169 mm in 2022.
The hottest October reached 35.9°C in 2015. The coldest dipped to 0.8°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 0.5°C — but days and nights have moved in opposite directions. Overnight lows rose from 6.7°C to 7.7°C while daytime highs eased from 21.3°C to 21.2°C, narrowing the gap between day and night.
October is one of the cooler months of the year in Horsham and about average for rainfall, so plan for around 21.5°C daytime highs and 7.2°C at night.
Not quite — October is the 6th coolest month in Horsham, averaging 14.4°C.
For October in Horsham, pack warm layers and a jacket for chilly mornings, with typical highs of 21.5°C and lows of 7.2°C.
Relative humidity in October averages 66% — moderately humid.
Average wind speed in October is 3.1 m/s. The windiest October on record averaged 3.9 m/s (1988).
The wettest October on record was 2022 with 169 mm. On average, October sees 42 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 Horsham 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.
