March is one of the cooler months of the year in Neath, with average highs near 9.1°C and lows around 4.6°C (mean 6.9°C). It is about average for rainfall, averaging 80 mm of rainfall and 89% relative humidity across the period.
March is one of the cooler months of the year in Neath. Across 45 years of records, the warmest March in Neath was 2012 — when the month averaged 8.4°C — while the coldest was 2013 at 3.7°C. Typical March days reach 9.1°C with nights near 4.6°C. The long-term trend is warming, about 0.2°C per decade.
March is about average for rainfall in Neath, averaging 80 mm of rainfall. The wettest March on record was 2023 with 162 mm, while the driest was 2025 at 19 mm.
Relative humidity in Neath during March averages 89%. The most humid March was 2024 at 91%, and the least humid was 1995 at 86%.
March receives about 2.5 kWh/m²/day of solar energy in Neath. The sunniest March was 2025 at 3.2 kWh/m²/day, and the cloudiest was 1996 at 1.8.
Average wind speed in Neath during March is 4.7 m/s. The windiest March was 1994 at 6 m/s, while the calmest was 2012 at 3.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.2°C | 7.2°C | 6.9°C | 6.6°C | 7.5°C | +1.3°C |
| Avg High | 8.4°C | 9.5°C | 9.2°C | 9.0°C | 9.8°C | +1.4°C |
| Avg Low | 4.1°C | 5.0°C | 4.6°C | 4.3°C | 5.1°C | +1°C |
| Avg Rain | 95 mm | 69 mm | 76 mm | 78 mm | 88 mm | -7 mm |
March temperatures in Neath have risen by about 1.5°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -4.4°C (2018) to a record high of 16.4°C (2012).
Rainfall in March is about average for rainfall, averaging 80 mm, with a wettest year of 162 mm.
A quieter season to visit Neath
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Neath. That said, March — with days averaging 9.1°C and nights around 4.6°C (mean 6.9°C) and higher rainfall (80 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 | 10.5°C | 7.7°C | 4.8°C | 14.7°C | 1.1°C | 19 mm | 88% | 3.4 m/s | 3.2 |
| 2024 | 9.9°C | 8.0°C | 6.0°C | 12.8°C | 2.8°C | 134 mm | 91% | 4.6 m/s | 2.5 |
| 2023 🌧️ | 9.4°C | 7.5°C | 5.5°C | 12.6°C | 0.6°C | 162 mm | 90% | 4.9 m/s | 2.2 |
| 2022 | 10.7°C | 7.9°C | 5.1°C | 15.5°C | 2.0°C | 48 mm | 87% | 4.3 m/s | 3 |
| 2021 | 9.4°C | 7.2°C | 4.9°C | 16.2°C | 1.0°C | 67 mm | 88% | 4.5 m/s | 2.7 |
| 2020 | 9.1°C | 6.7°C | 4.3°C | 13.4°C | 1.3°C | 98 mm | 88% | 5.5 m/s | 3 |
| 2019 | 10.0°C | 7.9°C | 5.9°C | 12.0°C | 3.6°C | 132 mm | 89% | 5.1 m/s | 2.7 |
| 2018 | 7.2°C | 5.1°C | 3.0°C | 10.4°C | -4.4°C | 137 mm | 90% | 4.9 m/s | 2.2 |
| 2017 | 10.4°C | 8.3°C | 6.2°C | 14.1°C | 2.5°C | 109 mm | 90% | 4.8 m/s | 2.5 |
| 2016 | 8.5°C | 6.1°C | 3.8°C | 11.4°C | 1.0°C | 97 mm | 87% | 4.5 m/s | 2.8 |
| 2015 | 8.8°C | 6.4°C | 4.0°C | 11.0°C | 1.4°C | 68 mm | 88% | 4.8 m/s | 2.7 |
| 2014 | 9.7°C | 7.4°C | 5.2°C | 14.2°C | 2.1°C | 37 mm | 90% | 4.3 m/s | 2.8 |
| 2013 ❄️ | 5.9°C | 3.7°C | 1.6°C | 11.0°C | -1.7°C | 74 mm | 87% | 4.8 m/s | 2.2 |
| 2012 🔥 | 11.0°C | 8.4°C | 5.7°C | 16.4°C | 3.0°C | 25 mm | 88% | 3.3 m/s | 3.1 |
| 2011 | 9.8°C | 7.0°C | 4.3°C | 14.8°C | -0.4°C | 27 mm | 89% | 3.4 m/s | 3 |
| 2010 | 8.2°C | 5.8°C | 3.4°C | 10.4°C | -1.0°C | 78 mm | 90% | 4 m/s | 2.7 |
| 2009 | 9.2°C | 6.9°C | 4.7°C | 12.0°C | 1.2°C | 51 mm | 89% | 4.4 m/s | 3 |
| 2008 | 8.8°C | 6.8°C | 4.7°C | 11.4°C | 1.3°C | 116 mm | 86% | 5.9 m/s | 2.7 |
| 2007 | 9.9°C | 7.5°C | 5.1°C | 13.7°C | 0.6°C | 73 mm | 87% | 4.9 m/s | 3 |
| 2006 | 7.5°C | 5.6°C | 3.7°C | 12.0°C | 0.2°C | 100 mm | 87% | 5.6 m/s | 2.3 |
| 2005 | 9.6°C | 7.2°C | 4.8°C | 15.0°C | -0.9°C | 70 mm | 89% | 4.1 m/s | 2.3 |
| 2004 | 9.0°C | 6.7°C | 4.3°C | 13.7°C | 0.0°C | 69 mm | 88% | 4.5 m/s | 2.5 |
| 2003 | 10.6°C | 7.7°C | 4.8°C | 13.7°C | 1.6°C | 48 mm | 89% | 4.4 m/s | 3.1 |
| 2002 | 9.9°C | 7.7°C | 5.5°C | 12.9°C | 0.6°C | 63 mm | 90% | 4.6 m/s | 2.5 |
| 2001 | 7.6°C | 5.8°C | 3.9°C | 11.7°C | -0.4°C | 122 mm | 91% | 4.6 m/s | 2 |
| 2000 | 9.7°C | 7.3°C | 4.9°C | 13.1°C | 1.8°C | 47 mm | 88% | 4.2 m/s | 2.7 |
| 1999 | 9.3°C | 7.2°C | 5.1°C | 13.9°C | 2.0°C | 66 mm | 90% | 4.4 m/s | 2.5 |
| 1998 | 10.3°C | 8.2°C | 6.2°C | 13.8°C | 3.1°C | 118 mm | 90% | 4.6 m/s | 2.2 |
| 1997 | 10.5°C | 8.1°C | 5.7°C | 13.5°C | 3.3°C | 47 mm | 90% | 4.2 m/s | 2.7 |
| 1996 | 8.0°C | 5.4°C | 2.8°C | 14.1°C | -0.3°C | 79 mm | 88% | 4.3 m/s | 1.8 |
| 1995 | 8.1°C | 5.9°C | 3.6°C | 12.6°C | 0.6°C | 71 mm | 86% | 5.3 m/s | 2.6 |
| 1994 | 9.3°C | 7.4°C | 5.5°C | 12.1°C | 2.3°C | 114 mm | 89% | 6 m/s | 2.4 |
| 1993 | 9.1°C | 6.7°C | 4.3°C | 12.8°C | 0.5°C | 29 mm | 87% | 4.2 m/s | 2.4 |
| 1992 | 9.4°C | 7.3°C | 5.2°C | 11.3°C | 2.1°C | 63 mm | 88% | 5.5 m/s | 2.2 |
| 1991 | 10.3°C | 7.8°C | 5.3°C | 14.3°C | 1.0°C | 83 mm | 89% | 4.1 m/s | 2 |
| 1990 | 10.4°C | 8.1°C | 5.9°C | 15.0°C | 1.4°C | 22 mm | 87% | 4.9 m/s | 2.6 |
| 1989 | 9.8°C | 7.6°C | 5.4°C | 13.4°C | 1.4°C | 114 mm | 88% | 5.4 m/s | 2.1 |
| 1988 | 8.7°C | 6.9°C | 5.0°C | 11.0°C | 0.2°C | 108 mm | 90% | 5.3 m/s | 2.1 |
| 1987 | 7.3°C | 5.2°C | 3.0°C | 11.3°C | -1.1°C | 91 mm | 88% | 5.2 m/s | 2.3 |
| 1986 | 7.4°C | 5.1°C | 2.8°C | 9.4°C | -2.9°C | 89 mm | 90% | 5.1 m/s | 2.5 |
| 1985 | 7.5°C | 5.3°C | 3.1°C | 11.3°C | -1.3°C | 71 mm | 87% | 4.5 m/s | 2.2 |
| 1984 | 7.6°C | 5.1°C | 2.6°C | 11.4°C | -0.2°C | 36 mm | 87% | 4 m/s | 2.2 |
| 1983 | 8.4°C | 6.4°C | 4.4°C | 10.6°C | 0.5°C | 58 mm | 90% | 4.3 m/s | — |
| 1982 | 8.8°C | 6.4°C | 4.0°C | 12.5°C | 1.4°C | 130 mm | 87% | 5.1 m/s | — |
| 1981 | 9.7°C | 8.0°C | 6.2°C | 12.2°C | 0.1°C | 160 mm | 90% | 5.5 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 9.1°C with lows near 4.6°C (mean 6.9°C), based on 45 years of NASA POWER data.
March averages 80 mm of rainfall in Neath, about average for rainfall. The wettest on record was 162 mm in 2023.
The hottest March reached 16.4°C in 2012. The coldest dipped to -4.4°C in 2018.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 1.5°C. Daytime highs moved from 8.4°C to 10°C and overnight lows from 4.1°C to 5.3°C over the same span.
March is one of the cooler months of the year in Neath and about average for rainfall, so plan for around 9.1°C daytime highs and 4.6°C at night.
Not quite — March is the 4th coolest month in Neath, averaging 6.9°C.
For March in Neath, pack warm layers and a jacket for chilly mornings, with typical highs of 9.1°C and lows of 4.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 89% — quite humid.
Average wind speed in March is 4.7 m/s. The windiest March on record averaged 6 m/s (1994).
The wettest March on record was 2023 with 162 mm. On average, March sees 80 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 Neath 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.
