March is one of the warmer months of the year in Westport, with average highs near 16.5°C and lows around 9°C (mean 12.8°C). It is one of the drier months, averaging 130 mm of rainfall and 86% relative humidity across the period.
March is one of the warmer months of the year in Westport. Across 45 years of records, the warmest March in Westport was 2019 — when the month averaged 15.4°C — while the coldest was 1992 at 10.4°C. Typical March days reach 16.5°C with nights near 9°C. The long-term trend is warming, about 0.2°C per decade.
March is one of the drier months in Westport, averaging 130 mm of rainfall. The wettest March on record was 1984 with 271 mm, while the driest was 1982 at 28 mm.
Relative humidity in Westport during March averages 86%. The most humid March was 2007 at 89%, and the least humid were 1982 and 2001 at 81%.
March receives about 4.3 kWh/m²/day of solar energy in Westport. The sunniest March was 2001 at 4.9 kWh/m²/day, and the cloudiest was 1992 at 3.8.
Average wind speed in Westport during March is 0.4 m/s. The windiest Marchs were 2023, 2024 and 2025, among others at 0.4 m/s, while the calmest were 2016, 2017 and 2020, among others at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.6°C | 12.4°C | 12.8°C | 13.2°C | 12.9°C | +0.3°C |
| Avg High | 16.4°C | 16.1°C | 16.5°C | 17.0°C | 16.7°C | +0.3°C |
| Avg Low | 8.9°C | 8.7°C | 9.0°C | 9.4°C | 9.1°C | +0.2°C |
| Avg Rain | 156 mm | 132 mm | 118 mm | 122 mm | 119 mm | -37 mm |
March temperatures in Westport have stayed relatively stable across the record.
March has ranged from a record low of -0.3°C (1983) to a record high of 23.8°C (2013).
Rainfall in March is one of the drier months, averaging 130 mm, with a wettest year of 271 mm.
One of the best times to visit Westport
March is one of the best times to visit Westport. Expect days averaging 16.5°C and nights around 9°C (mean 12.8°C) — warmer than Westport's yearly average — with higher rainfall (130 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 | 17.6°C | 13.6°C | 9.6°C | 21.0°C | 3.9°C | 78 mm | 85% | 0.4 m/s | 4.7 |
| 2024 | 14.8°C | 11.2°C | 7.7°C | 18.7°C | 1.8°C | 93 mm | 86% | 0.4 m/s | 4.2 |
| 2023 | 16.1°C | 12.5°C | 8.8°C | 20.5°C | 2.4°C | 189 mm | 87% | 0.4 m/s | 4.4 |
| 2022 | 18.8°C | 14.6°C | 10.4°C | 21.4°C | 5.8°C | 61 mm | 85% | 0.4 m/s | 4.7 |
| 2021 | 16.6°C | 13.1°C | 9.6°C | 18.7°C | 7.1°C | 177 mm | 88% | 0.4 m/s | 4.3 |
| 2020 | 16.2°C | 12.3°C | 8.4°C | 19.5°C | 4.3°C | 117 mm | 84% | 0.3 m/s | 4.4 |
| 2019 🔥 | 19.2°C | 15.4°C | 11.5°C | 22.4°C | 6.5°C | 152 mm | 85% | 0.4 m/s | 4.1 |
| 2018 | 17.0°C | 13.6°C | 10.2°C | 21.5°C | 5.7°C | 148 mm | 88% | 0.4 m/s | 4 |
| 2017 | 16.9°C | 13.1°C | 9.3°C | 21.1°C | 4.5°C | 135 mm | 87% | 0.3 m/s | 4 |
| 2016 | 17.3°C | 13.6°C | 10.0°C | 20.7°C | 3.6°C | 161 mm | 87% | 0.3 m/s | 4.3 |
| 2015 | 17.0°C | 13.5°C | 10.0°C | 20.8°C | 3.6°C | 187 mm | 87% | 0.4 m/s | 4.4 |
| 2014 | 16.8°C | 12.7°C | 8.7°C | 20.7°C | 3.4°C | 58 mm | 84% | 0.3 m/s | 4.5 |
| 2013 | 18.5°C | 14.3°C | 10.1°C | 23.8°C | 5.2°C | 55 mm | 82% | 0.3 m/s | 4.4 |
| 2012 | 15.5°C | 11.7°C | 7.9°C | 21.0°C | 3.2°C | 92 mm | 85% | 0.4 m/s | 4.2 |
| 2011 | 16.4°C | 12.3°C | 8.2°C | 19.2°C | 2.9°C | 141 mm | 85% | 0.4 m/s | 4.5 |
| 2010 | 15.9°C | 12.2°C | 8.5°C | 20.9°C | 3.7°C | 89 mm | 87% | 0.4 m/s | 4.2 |
| 2009 | 15.9°C | 12.1°C | 8.4°C | 19.9°C | 3.1°C | 93 mm | 86% | 0.4 m/s | 4.3 |
| 2008 | 17.4°C | 13.7°C | 10.0°C | 21.4°C | 6.7°C | 117 mm | 87% | 0.4 m/s | 4.1 |
| 2007 | 16.5°C | 13.0°C | 9.6°C | 19.8°C | 5.3°C | 168 mm | 89% | 0.4 m/s | 4.2 |
| 2006 | 15.1°C | 11.4°C | 7.6°C | 19.2°C | 4.2°C | 96 mm | 84% | 0.4 m/s | 4.4 |
| 2005 | 16.4°C | 12.9°C | 9.4°C | 20.2°C | 5.3°C | 145 mm | 87% | 0.4 m/s | 4.2 |
| 2004 | 14.7°C | 11.3°C | 8.0°C | 18.6°C | 1.4°C | 125 mm | 88% | 0.4 m/s | 4.1 |
| 2003 | 18.1°C | 14.2°C | 10.2°C | 22.3°C | 7.1°C | 88 mm | 85% | 0.4 m/s | 4.7 |
| 2002 | 16.1°C | 12.9°C | 9.6°C | 20.3°C | 5.0°C | 152 mm | 88% | 0.4 m/s | 4.2 |
| 2001 | 17.8°C | 13.6°C | 9.3°C | 22.1°C | 3.1°C | 127 mm | 81% | 0.4 m/s | 4.9 |
| 2000 | 16.9°C | 12.6°C | 8.3°C | 22.1°C | 2.8°C | 74 mm | 83% | 0.3 m/s | 4.5 |
| 1999 | 18.1°C | 14.5°C | 10.9°C | 21.5°C | 7.8°C | 97 mm | 84% | 0.4 m/s | 4.2 |
| 1998 | 16.5°C | 13.2°C | 10.0°C | 20.8°C | 5.7°C | 143 mm | 87% | 0.4 m/s | 3.9 |
| 1997 | 15.9°C | 12.1°C | 8.4°C | 19.7°C | 3.6°C | 103 mm | 84% | 0.4 m/s | 4.3 |
| 1996 | 15.5°C | 11.8°C | 8.2°C | 18.4°C | 3.9°C | 230 mm | 86% | 0.4 m/s | 4 |
| 1995 | 15.6°C | 12.1°C | 8.6°C | 20.1°C | 4.0°C | 179 mm | 87% | 0.4 m/s | 4.4 |
| 1994 | 15.5°C | 11.4°C | 7.4°C | 18.7°C | 0.8°C | 141 mm | 86% | 0.4 m/s | 4.1 |
| 1993 | 15.3°C | 11.6°C | 7.8°C | 20.1°C | 0.9°C | 180 mm | 85% | 0.4 m/s | 4.1 |
| 1992 ❄️ | 13.9°C | 10.4°C | 6.9°C | 19.0°C | 0.2°C | 125 mm | 86% | 0.4 m/s | 3.8 |
| 1991 | 16.9°C | 13.1°C | 9.3°C | 19.7°C | 4.6°C | 48 mm | 84% | 0.3 m/s | 4.5 |
| 1990 | 17.6°C | 13.7°C | 9.8°C | 20.4°C | 2.2°C | 74 mm | 84% | 0.4 m/s | 4.4 |
| 1989 | 16.4°C | 12.6°C | 8.8°C | 22.2°C | 3.0°C | 249 mm | 85% | 0.4 m/s | 4 |
| 1988 | 15.3°C | 11.7°C | 8.2°C | 21.6°C | 4.4°C | 158 mm | 85% | 0.4 m/s | 4.1 |
| 1987 | 15.3°C | 11.6°C | 8.0°C | 18.6°C | 2.3°C | 153 mm | 86% | 0.4 m/s | 4.2 |
| 1986 | 16.8°C | 12.8°C | 8.7°C | 19.5°C | 3.2°C | 132 mm | 86% | 0.4 m/s | 4.4 |
| 1985 | 17.2°C | 12.7°C | 8.3°C | 20.8°C | 3.5°C | 58 mm | 82% | 0.4 m/s | 4.6 |
| 1984 🌧️ | 16.9°C | 13.4°C | 9.9°C | 19.2°C | 4.5°C | 271 mm | 88% | 0.4 m/s | 3.9 |
| 1983 | 15.0°C | 11.2°C | 7.5°C | 19.3°C | -0.3°C | 128 mm | 87% | 0.4 m/s | — |
| 1982 | 17.5°C | 13.6°C | 9.7°C | 19.5°C | 4.1°C | 28 mm | 81% | 0.4 m/s | — |
| 1981 | 17.5°C | 14.1°C | 10.7°C | 23.3°C | 5.5°C | 232 mm | 86% | 0.3 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 16.5°C with lows near 9°C (mean 12.8°C), based on 45 years of NASA POWER data.
March averages 130 mm of rainfall in Westport, one of the drier months. The wettest on record was 271 mm in 1984.
The hottest March reached 23.8°C in 2013. The coldest dipped to -0.3°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have held steady by about 0°C. Daytime highs moved from 16.8°C to 16.8°C and overnight lows from 9.2°C to 9.2°C over the same span.
March is one of the warmer months of the year in Westport and one of the drier months, so plan for around 16.5°C daytime highs and 9°C at night.
Not quite — March is the 10th coolest month in Westport, averaging 12.8°C.
For March in Westport, pack light layers you can adjust through the day, with typical highs of 16.5°C and lows of 9°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 86% — quite humid.
Average wind speed in March is 0.4 m/s. The windiest March on record averaged 0.4 m/s (1982).
The wettest March on record was 1984 with 271 mm. On average, March sees 130 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 Westport 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.
