March is one of the cooler months of the year in Plymouth, with average highs near 9.5°C and lows around 5°C (mean 7.3°C). It is about average for rainfall, averaging 88 mm of rainfall and 89% relative humidity across the period.
March is one of the cooler months of the year in Plymouth. Across 45 years of records, the warmest Marchs in Plymouth were 2012 and 2017 — when the month averaged 8.7°C — while the coldest was 2013 at 4.4°C. Typical March days reach 9.5°C with nights near 5°C. The long-term trend is warming, about 0.2°C per decade.
March is about average for rainfall in Plymouth, averaging 88 mm of rainfall. The wettest March on record was 2023 with 176 mm, while the driest was 2025 at 17 mm.
Relative humidity in Plymouth during March averages 89%. The most humid March was 2001 at 91%, and the least humid was 1995 at 86%.
March receives about 2.8 kWh/m²/day of solar energy in Plymouth. The sunniest March was 2009 at 3.3 kWh/m²/day, and the cloudiest were 2001, 2006 and 2023, among others at 2.4.
Average wind speed in Plymouth during March is 4.9 m/s. The windiest Marchs were 1981 and 2008 at 6 m/s, while the calmest was 2011 at 3.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.6°C | 7.5°C | 7.3°C | 7.1°C | 8.0°C | +1.4°C |
| Avg High | 8.8°C | 9.7°C | 9.5°C | 9.4°C | 10.2°C | +1.4°C |
| Avg Low | 4.5°C | 5.3°C | 5.1°C | 4.8°C | 5.7°C | +1.2°C |
| Avg Rain | 107 mm | 73 mm | 82 mm | 88 mm | 95 mm | -12 mm |
March temperatures in Plymouth have risen by about 1.5°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -4.1°C (2018) to a record high of 16.7°C (2021).
Rainfall in March is about average for rainfall, averaging 88 mm, with a wettest year of 176 mm.
A quieter season to visit Plymouth
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Plymouth. That said, March — with days averaging 9.5°C and nights around 5°C (mean 7.3°C) and higher rainfall (88 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 | 10.8°C | 8.2°C | 5.5°C | 14.1°C | 1.2°C | 17 mm | 88% | 3.8 m/s | 3.2 |
| 2024 | 10.3°C | 8.4°C | 6.6°C | 12.9°C | 3.2°C | 165 mm | 90% | 4.8 m/s | 2.7 |
| 2023 🌧️ | 10.0°C | 8.1°C | 6.2°C | 12.6°C | 1.1°C | 176 mm | 90% | 5.3 m/s | 2.4 |
| 2022 | 10.7°C | 8.3°C | 5.8°C | 14.8°C | 2.3°C | 63 mm | 87% | 4.7 m/s | 3.2 |
| 2021 | 10.0°C | 7.7°C | 5.4°C | 16.7°C | 0.6°C | 53 mm | 87% | 4.7 m/s | 2.9 |
| 2020 | 9.5°C | 7.2°C | 4.8°C | 13.4°C | 1.1°C | 95 mm | 88% | 5.6 m/s | 3.2 |
| 2019 | 10.7°C | 8.5°C | 6.3°C | 13.1°C | 4.2°C | 131 mm | 88% | 5.4 m/s | 2.9 |
| 2018 | 7.6°C | 5.6°C | 3.7°C | 10.6°C | -4.1°C | 171 mm | 90% | 5.2 m/s | 2.5 |
| 2017 | 10.7°C | 8.7°C | 6.7°C | 13.5°C | 2.6°C | 113 mm | 90% | 5.3 m/s | 2.5 |
| 2016 | 9.0°C | 6.5°C | 4.1°C | 11.3°C | 1.1°C | 105 mm | 86% | 4.8 m/s | 3 |
| 2015 | 9.1°C | 6.7°C | 4.3°C | 11.6°C | 1.6°C | 64 mm | 88% | 4.9 m/s | 2.9 |
| 2014 | 9.9°C | 7.8°C | 5.6°C | 13.5°C | 2.0°C | 44 mm | 90% | 4.3 m/s | 2.6 |
| 2013 ❄️ | 6.6°C | 4.4°C | 2.3°C | 11.6°C | -2.3°C | 103 mm | 87% | 4.9 m/s | 2.5 |
| 2012 🔥 | 11.4°C | 8.7°C | 6.0°C | 15.9°C | 3.3°C | 30 mm | 88% | 3.7 m/s | 3.1 |
| 2011 | 10.2°C | 7.4°C | 4.7°C | 14.8°C | -0.6°C | 34 mm | 89% | 3.5 m/s | 3.1 |
| 2010 | 8.5°C | 6.2°C | 3.9°C | 11.1°C | -0.9°C | 86 mm | 89% | 4.6 m/s | 2.9 |
| 2009 | 9.7°C | 7.3°C | 4.9°C | 12.3°C | 1.5°C | 55 mm | 88% | 4.7 m/s | 3.3 |
| 2008 | 9.0°C | 7.1°C | 5.1°C | 12.4°C | 1.9°C | 114 mm | 86% | 6 m/s | 2.9 |
| 2007 | 10.0°C | 7.6°C | 5.2°C | 12.9°C | 0.5°C | 84 mm | 87% | 5 m/s | 3 |
| 2006 | 7.6°C | 5.8°C | 4.0°C | 12.2°C | -0.4°C | 107 mm | 88% | 5.9 m/s | 2.4 |
| 2005 | 9.5°C | 7.2°C | 5.0°C | 14.1°C | -0.9°C | 59 mm | 89% | 4.4 m/s | 2.5 |
| 2004 | 8.9°C | 6.9°C | 4.8°C | 12.8°C | 0.2°C | 88 mm | 88% | 4.8 m/s | 2.9 |
| 2003 | 10.7°C | 8.3°C | 5.8°C | 14.0°C | 2.9°C | 47 mm | 89% | 4.8 m/s | 3 |
| 2002 | 10.3°C | 8.2°C | 6.1°C | 13.0°C | 1.8°C | 85 mm | 90% | 4.6 m/s | 2.5 |
| 2001 | 8.8°C | 7.1°C | 5.3°C | 12.2°C | -0.4°C | 146 mm | 91% | 5 m/s | 2.4 |
| 2000 | 10.1°C | 7.5°C | 4.9°C | 13.2°C | 1.6°C | 34 mm | 88% | 4.2 m/s | 3 |
| 1999 | 9.4°C | 7.3°C | 5.2°C | 15.9°C | 2.1°C | 69 mm | 89% | 4.5 m/s | 2.9 |
| 1998 | 10.7°C | 8.5°C | 6.4°C | 13.4°C | 3.9°C | 110 mm | 89% | 4.8 m/s | 2.5 |
| 1997 | 10.9°C | 8.6°C | 6.2°C | 13.3°C | 3.1°C | 46 mm | 91% | 4.1 m/s | 2.9 |
| 1996 | 8.3°C | 6.1°C | 3.8°C | 14.0°C | 0.6°C | 85 mm | 89% | 4.6 m/s | 2.4 |
| 1995 | 8.6°C | 6.3°C | 3.9°C | 13.5°C | 1.0°C | 79 mm | 86% | 5.5 m/s | 2.7 |
| 1994 | 9.8°C | 7.8°C | 5.7°C | 12.4°C | 1.6°C | 112 mm | 89% | 5.8 m/s | 2.4 |
| 1993 | 9.3°C | 7.0°C | 4.7°C | 13.6°C | -0.2°C | 35 mm | 88% | 4.1 m/s | 2.4 |
| 1992 | 9.5°C | 7.4°C | 5.3°C | 12.1°C | 2.0°C | 64 mm | 89% | 5.6 m/s | 2.5 |
| 1991 | 10.3°C | 8.0°C | 5.7°C | 13.8°C | 2.4°C | 108 mm | 91% | 4.5 m/s | 2.5 |
| 1990 | 10.5°C | 8.2°C | 5.8°C | 14.3°C | 1.4°C | 28 mm | 87% | 4.5 m/s | 2.7 |
| 1989 | 10.3°C | 7.9°C | 5.6°C | 13.6°C | 1.1°C | 113 mm | 89% | 5.4 m/s | 2.4 |
| 1988 | 8.9°C | 7.1°C | 5.4°C | 10.7°C | -0.2°C | 130 mm | 90% | 5.5 m/s | 2.7 |
| 1987 | 7.9°C | 5.8°C | 3.7°C | 11.3°C | 0.0°C | 87 mm | 87% | 5.4 m/s | 2.7 |
| 1986 | 8.1°C | 5.7°C | 3.4°C | 10.5°C | -2.6°C | 97 mm | 90% | 5.2 m/s | 2.9 |
| 1985 | 7.6°C | 5.5°C | 3.4°C | 11.7°C | -0.5°C | 101 mm | 88% | 4.5 m/s | 2.7 |
| 1984 | 7.7°C | 5.4°C | 3.1°C | 11.5°C | 0.5°C | 62 mm | 87% | 4.1 m/s | 2.7 |
| 1983 | 9.0°C | 6.9°C | 4.8°C | 11.8°C | 1.7°C | 61 mm | 89% | 4.5 m/s | — |
| 1982 | 9.2°C | 6.7°C | 4.2°C | 12.6°C | 1.6°C | 139 mm | 87% | 5.4 m/s | — |
| 1981 | 10.2°C | 8.5°C | 6.8°C | 13.0°C | 0.8°C | 171 mm | 90% | 6 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 9.5°C with lows near 5°C (mean 7.3°C), based on 45 years of NASA POWER data.
March averages 88 mm of rainfall in Plymouth, about average for rainfall. The wettest on record was 176 mm in 2023.
The hottest March reached 16.7°C in 2021. The coldest dipped to -4.1°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 8.7°C to 10.4°C and overnight lows from 4.5°C to 5.9°C over the same span.
March is one of the cooler months of the year in Plymouth and about average for rainfall, so plan for around 9.5°C daytime highs and 5°C at night.
Not quite — March is the 3rd coolest month in Plymouth, averaging 7.3°C.
For March in Plymouth, pack warm layers and a jacket for chilly mornings, with typical highs of 9.5°C and lows of 5°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 89% — quite humid.
Average wind speed in March is 4.9 m/s. The windiest March on record averaged 6 m/s (1981).
The wettest March on record was 2023 with 176 mm. On average, March sees 88 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 Plymouth 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.
