March is one of the cooler months of the year in Horsham, with average highs near 9.9°C and lows around 3.5°C (mean 6.7°C). It is about average for rainfall, averaging 56 mm of rainfall and 88% relative humidity across the period.
March is one of the cooler months of the year in Horsham. Across 45 years of records, the warmest March in Horsham was 2017 — when the month averaged 8.9°C — while the coldest was 2013 at 3.4°C. Typical March days reach 9.9°C with nights near 3.5°C. The long-term trend is warming, about 0.3°C per decade.
March is about average for rainfall in Horsham, averaging 56 mm of rainfall. The wettest March on record was 2001 with 127 mm, while the driest were 1990 and 2025 at 11 mm.
Relative humidity in Horsham during March averages 88%. The most humid March was 2001 at 93%, and the least humid was 2006 at 85%.
March receives about 2.6 kWh/m²/day of solar energy in Horsham. The sunniest March was 2025 at 3.3 kWh/m²/day, and the cloudiest was 2001 at 2.
Average wind speed in Horsham during March is 4.1 m/s. The windiest Marchs were 1981, 1994 and 2008 at 5.1 m/s, while the calmest was 2012 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.9°C | 7.0°C | 6.7°C | 6.7°C | 7.4°C | +1.5°C |
| Avg High | 9.0°C | 10.2°C | 9.9°C | 9.9°C | 10.6°C | +1.6°C |
| Avg Low | 2.8°C | 3.8°C | 3.5°C | 3.4°C | 4.2°C | +1.4°C |
| Avg Rain | 74 mm | 43 mm | 54 mm | 53 mm | 59 mm | -15 mm |
March temperatures in Horsham have risen by about 1.6°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -4.8°C (1986) to a record high of 18.3°C (2012).
Rainfall in March is about average for rainfall, averaging 56 mm, with a wettest year of 127 mm.
A quieter season to visit Horsham
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Horsham. That said, March — with days averaging 9.9°C and nights around 3.5°C (mean 6.7°C) and moderate rainfall (56 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 | 11.5°C | 7.6°C | 3.8°C | 15.7°C | -0.7°C | 11 mm | 87% | 3 m/s | 3.3 |
| 2024 | 10.9°C | 8.3°C | 5.7°C | 15.2°C | 1.3°C | 91 mm | 91% | 3.9 m/s | 2.5 |
| 2023 | 10.0°C | 7.4°C | 4.8°C | 13.2°C | 0.0°C | 108 mm | 90% | 4.5 m/s | 2.3 |
| 2022 | 11.5°C | 8.0°C | 4.5°C | 16.6°C | 0.4°C | 51 mm | 87% | 3.8 m/s | 2.9 |
| 2021 | 10.2°C | 6.7°C | 3.2°C | 17.9°C | -1.7°C | 40 mm | 88% | 4 m/s | 2.6 |
| 2020 | 9.7°C | 6.6°C | 3.4°C | 12.7°C | 0.2°C | 55 mm | 88% | 4.9 m/s | 3.1 |
| 2019 | 11.4°C | 8.2°C | 5.1°C | 16.5°C | 1.6°C | 65 mm | 88% | 4.7 m/s | 2.8 |
| 2018 | 8.3°C | 5.4°C | 2.6°C | 12.3°C | -4.0°C | 105 mm | 90% | 4.1 m/s | 2.1 |
| 2017 🔥 | 11.9°C | 8.9°C | 6.0°C | 16.8°C | 2.4°C | 46 mm | 87% | 4.4 m/s | 2.7 |
| 2016 | 9.3°C | 6.0°C | 2.7°C | 12.4°C | -1.0°C | 81 mm | 87% | 4.1 m/s | 2.7 |
| 2015 | 9.5°C | 6.2°C | 2.8°C | 12.7°C | -0.9°C | 25 mm | 88% | 4.2 m/s | 2.8 |
| 2014 | 11.1°C | 7.7°C | 4.3°C | 15.3°C | -0.1°C | 31 mm | 89% | 3.6 m/s | 2.9 |
| 2013 ❄️ | 5.9°C | 3.4°C | 0.8°C | 11.6°C | -2.1°C | 78 mm | 89% | 4.1 m/s | 2.1 |
| 2012 | 12.6°C | 8.3°C | 4.1°C | 18.3°C | -0.2°C | 29 mm | 86% | 2.9 m/s | 3 |
| 2011 | 10.6°C | 6.8°C | 3.0°C | 16.6°C | -1.6°C | 21 mm | 89% | 3.3 m/s | 2.8 |
| 2010 | 8.7°C | 5.7°C | 2.8°C | 12.1°C | -2.5°C | 54 mm | 89% | 3.9 m/s | 2.7 |
| 2009 | 10.6°C | 6.9°C | 3.2°C | 13.5°C | -1.0°C | 37 mm | 87% | 3.7 m/s | 3 |
| 2008 | 9.4°C | 6.2°C | 3.1°C | 13.0°C | -2.5°C | 81 mm | 86% | 5.1 m/s | 2.6 |
| 2007 | 10.8°C | 7.3°C | 3.8°C | 15.8°C | -1.3°C | 53 mm | 88% | 4.3 m/s | 3 |
| 2006 | 7.8°C | 5.0°C | 2.1°C | 13.0°C | -2.7°C | 50 mm | 85% | 4.8 m/s | 2.4 |
| 2005 | 10.1°C | 6.8°C | 3.5°C | 16.4°C | -3.0°C | 45 mm | 89% | 3.5 m/s | 2.3 |
| 2004 | 9.1°C | 6.3°C | 3.4°C | 14.9°C | -2.0°C | 40 mm | 88% | 3.9 m/s | 2.3 |
| 2003 | 11.3°C | 7.7°C | 4.0°C | 15.8°C | 0.9°C | 27 mm | 88% | 3.7 m/s | 3.1 |
| 2002 | 11.0°C | 7.8°C | 4.6°C | 13.8°C | 0.9°C | 55 mm | 89% | 3.9 m/s | 2.6 |
| 2001 🌧️ | 8.3°C | 5.9°C | 3.4°C | 12.3°C | -2.0°C | 127 mm | 93% | 4 m/s | 2 |
| 2000 | 10.6°C | 7.0°C | 3.4°C | 14.3°C | -1.4°C | 21 mm | 89% | 3.8 m/s | 2.7 |
| 1999 | 10.5°C | 7.4°C | 4.3°C | 17.0°C | -0.3°C | 47 mm | 89% | 3.5 m/s | 2.6 |
| 1998 | 10.6°C | 7.7°C | 4.9°C | 15.2°C | 0.1°C | 59 mm | 89% | 4.1 m/s | 2.2 |
| 1997 | 11.7°C | 8.3°C | 4.8°C | 14.6°C | 1.4°C | 24 mm | 89% | 3.5 m/s | 2.9 |
| 1996 | 8.1°C | 4.8°C | 1.6°C | 14.7°C | -2.1°C | 43 mm | 87% | 3.6 m/s | 2.1 |
| 1995 | 9.0°C | 5.6°C | 2.2°C | 15.0°C | -1.5°C | 54 mm | 88% | 4.6 m/s | 2.8 |
| 1994 | 10.3°C | 7.3°C | 4.3°C | 13.8°C | -0.9°C | 56 mm | 89% | 5.1 m/s | 2.5 |
| 1993 | 9.6°C | 6.0°C | 2.5°C | 14.7°C | -2.3°C | 26 mm | 88% | 3.4 m/s | 2.7 |
| 1992 | 10.1°C | 7.2°C | 4.2°C | 14.0°C | 0.9°C | 51 mm | 88% | 4.6 m/s | 2.3 |
| 1991 | 10.8°C | 7.8°C | 4.7°C | 15.2°C | 0.0°C | 61 mm | 89% | 3.9 m/s | 2.2 |
| 1990 | 11.3°C | 7.9°C | 4.6°C | 15.6°C | -1.8°C | 11 mm | 87% | 4.1 m/s | 2.8 |
| 1989 | 11.3°C | 7.9°C | 4.6°C | 16.9°C | -0.4°C | 74 mm | 88% | 4.5 m/s | 2.2 |
| 1988 | 9.2°C | 6.4°C | 3.6°C | 12.6°C | -2.6°C | 78 mm | 89% | 4.6 m/s | 2.3 |
| 1987 | 7.1°C | 4.1°C | 1.0°C | 11.2°C | -3.0°C | 76 mm | 87% | 4.4 m/s | 2.4 |
| 1986 | 8.0°C | 4.9°C | 1.8°C | 11.6°C | -4.8°C | 71 mm | 90% | 4.3 m/s | 2.6 |
| 1985 | 7.7°C | 4.7°C | 1.7°C | 12.7°C | -2.6°C | 52 mm | 90% | 3.5 m/s | 2.2 |
| 1984 | 8.3°C | 5.0°C | 1.6°C | 11.7°C | -1.9°C | 77 mm | 88% | 3.7 m/s | 2.2 |
| 1983 | 9.3°C | 6.0°C | 2.8°C | 13.5°C | -1.6°C | 43 mm | 90% | 3.8 m/s | — |
| 1982 | 9.2°C | 6.0°C | 2.7°C | 14.6°C | -0.1°C | 83 mm | 87% | 4.6 m/s | — |
| 1981 | 10.6°C | 8.1°C | 5.6°C | 14.3°C | -0.3°C | 114 mm | 90% | 5.1 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 9.9°C with lows near 3.5°C (mean 6.7°C), based on 45 years of NASA POWER data.
March averages 56 mm of rainfall in Horsham, about average for rainfall. The wettest on record was 127 mm in 2001.
The hottest March reached 18.3°C in 2012. The coldest dipped to -4.8°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 1.6°C. Daytime highs moved from 9°C to 10.8°C and overnight lows from 2.9°C to 4.4°C over the same span.
March is one of the cooler months of the year in Horsham and about average for rainfall, so plan for around 9.9°C daytime highs and 3.5°C at night.
Not quite — March is the 4th coolest month in Horsham, averaging 6.7°C.
For March in Horsham, pack warm layers and a jacket for chilly mornings, with typical highs of 9.9°C and lows of 3.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 88% — quite humid.
Average wind speed in March is 4.1 m/s. The windiest March on record averaged 5.1 m/s (1981).
The wettest March on record was 2001 with 127 mm. On average, March sees 56 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 March, 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 March specifically, along with year-by-year records and how the month has changed over the decades.
