March is one of the cooler months of the year in Truro, with average highs near 2.4°C and lows around -6°C (mean -1.8°C). It is one of the drier months, averaging 66 mm of rainfall and 84% relative humidity across the period.
March is one of the cooler months of the year in Truro. Across 45 years of records, the warmest March in Truro was 1999 — when the month averaged 1.5°C — while the coldest was 2015 at -6.7°C. Typical March days reach 2.4°C with nights near -6°C. The long-term trend is warming, about 0.2°C per decade.
March is one of the drier months in Truro, averaging 66 mm of rainfall. The wettest March on record was 2003 with 143 mm, while the driest was 1988 at 25 mm.
Relative humidity in Truro during March averages 84%. The most humid March was 2015 at 97%, and the least humid was 1990 at 77%.
March receives about 3.4 kWh/m²/day of solar energy in Truro. The sunniest Marchs were 1992 and 2021 at 4 kWh/m²/day, and the cloudiest was 1995 at 3.
Average wind speed in Truro during March is 0.6 m/s. The windiest March was 2011 at 0.8 m/s, while the calmest were 2019, 2022 and 2023, among others at 0.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -2.2°C | -1.7°C | -2.0°C | -2.2°C | -0.4°C | +1.8°C |
| Avg High | 2.2°C | 2.6°C | 2.0°C | 1.9°C | 3.7°C | +1.5°C |
| Avg Low | -6.5°C | -6.0°C | -6.1°C | -6.2°C | -4.3°C | +2.2°C |
| Avg Rain | 63 mm | 63 mm | 80 mm | 61 mm | 59 mm | -4 mm |
March temperatures in Truro have risen by about 1.6°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -21.4°C (1982) to a record high of 20.1°C (2012).
Rainfall in March is one of the drier months, averaging 66 mm, with a wettest year of 143 mm.
A quieter season to visit Truro
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Truro. That said, March — with days averaging 2.4°C and nights around -6°C (mean -1.8°C) and moderate rainfall (66 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 | 5.0°C | 0.6°C | -3.8°C | 12.1°C | -13.2°C | 63 mm | 81% | 0.6 m/s | 3.6 |
| 2024 | 4.5°C | 1.3°C | -1.9°C | 14.6°C | -10.1°C | 99 mm | 85% | 0.7 m/s | 3.2 |
| 2023 | 2.0°C | -1.4°C | -4.7°C | 5.8°C | -12.5°C | 35 mm | 85% | 0.5 m/s | 3.3 |
| 2022 | 3.5°C | -0.5°C | -4.6°C | 11.9°C | -17.4°C | 70 mm | 85% | 0.5 m/s | 3.2 |
| 2021 | 4.2°C | -0.9°C | -6.0°C | 14.8°C | -14.9°C | 51 mm | 79% | 0.6 m/s | 4 |
| 2020 | 2.7°C | -1.2°C | -5.1°C | 9.9°C | -10.7°C | 37 mm | 80% | 0.6 m/s | 3.4 |
| 2019 | 1.6°C | -2.9°C | -7.3°C | 10.7°C | -20.8°C | 52 mm | 86% | 0.5 m/s | 3.8 |
| 2018 | 2.3°C | -0.9°C | -4.2°C | 9.4°C | -11.6°C | 48 mm | 86% | 0.6 m/s | 3.1 |
| 2017 | -0.2°C | -4.2°C | -8.1°C | 8.7°C | -18.2°C | 60 mm | 81% | 0.7 m/s | 3.2 |
| 2016 | 2.2°C | -2.1°C | -6.4°C | 9.8°C | -15.1°C | 77 mm | 84% | 0.7 m/s | 3.3 |
| 2015 ❄️ | -2.3°C | -6.7°C | -11.0°C | 2.0°C | -18.9°C | 94 mm | 97% | 0.6 m/s | 3.2 |
| 2014 | -0.1°C | -4.7°C | -9.4°C | 6.9°C | -18.9°C | 90 mm | 82% | 0.6 m/s | 3.5 |
| 2013 | 3.1°C | -0.3°C | -3.8°C | 11.8°C | -12.0°C | 47 mm | 83% | 0.6 m/s | 3.1 |
| 2012 | 4.8°C | 0.6°C | -3.6°C | 20.1°C | -11.5°C | 40 mm | 83% | 0.6 m/s | 3.4 |
| 2011 | 3.0°C | -1.2°C | -5.4°C | 9.5°C | -16.1°C | 27 mm | 80% | 0.8 m/s | 3.7 |
| 2010 | 4.3°C | 0.6°C | -3.1°C | 13.9°C | -10.2°C | 75 mm | 84% | 0.7 m/s | 3.6 |
| 2009 | 1.6°C | -2.6°C | -6.7°C | 11.2°C | -13.8°C | 101 mm | 85% | 0.6 m/s | 3.4 |
| 2008 | 0.6°C | -4.0°C | -8.5°C | 9.9°C | -16.8°C | 117 mm | 84% | 0.7 m/s | 3.4 |
| 2007 | 2.0°C | -1.9°C | -5.9°C | 10.5°C | -17.5°C | 34 mm | 80% | 0.7 m/s | 3.4 |
| 2006 | 2.6°C | -1.0°C | -4.7°C | 11.4°C | -17.2°C | 33 mm | 83% | 0.5 m/s | 3.4 |
| 2005 | 1.3°C | -2.2°C | -5.8°C | 9.3°C | -11.1°C | 96 mm | 84% | 0.7 m/s | 3.1 |
| 2004 | 1.6°C | -2.5°C | -6.6°C | 10.0°C | -13.6°C | 58 mm | 86% | 0.6 m/s | 3.3 |
| 2003 🌧️ | 1.9°C | -2.9°C | -7.8°C | 11.3°C | -17.0°C | 143 mm | 84% | 0.6 m/s | 3.1 |
| 2002 | 2.9°C | -1.3°C | -5.4°C | 11.7°C | -11.0°C | 68 mm | 78% | 0.6 m/s | 3.5 |
| 2001 | 1.0°C | -2.3°C | -5.6°C | 8.9°C | -18.6°C | 65 mm | 90% | 0.6 m/s | 3.4 |
| 2000 | 4.6°C | 0.4°C | -3.8°C | 15.3°C | -10.3°C | 87 mm | 87% | 0.6 m/s | 3.4 |
| 1999 🔥 | 5.7°C | 1.5°C | -2.6°C | 14.8°C | -7.6°C | 119 mm | 84% | 0.6 m/s | 3.3 |
| 1998 | 3.8°C | -0.1°C | -4.0°C | 16.5°C | -11.2°C | 76 mm | 86% | 0.6 m/s | 3.1 |
| 1997 | -0.2°C | -4.3°C | -8.4°C | 11.0°C | -17.0°C | 46 mm | 81% | 0.6 m/s | 3.6 |
| 1996 | 2.9°C | -1.7°C | -6.2°C | 10.7°C | -16.0°C | 54 mm | 79% | 0.6 m/s | 3.5 |
| 1995 | 2.1°C | -2.2°C | -6.4°C | 11.9°C | -17.9°C | 33 mm | 85% | 0.6 m/s | 3 |
| 1994 | 2.8°C | -1.3°C | -5.4°C | 9.4°C | -16.5°C | 97 mm | 86% | 0.6 m/s | 3.3 |
| 1993 | 2.6°C | -2.5°C | -7.6°C | 17.1°C | -16.5°C | 62 mm | 85% | 0.7 m/s | 3.4 |
| 1992 | 0.1°C | -4.4°C | -8.9°C | 9.7°C | -20.5°C | 52 mm | 82% | 0.6 m/s | 4 |
| 1991 | 3.7°C | -0.3°C | -4.2°C | 9.5°C | -10.0°C | 57 mm | 84% | 0.6 m/s | 3.4 |
| 1990 | 2.4°C | -2.0°C | -6.5°C | 12.7°C | -16.1°C | 34 mm | 77% | 0.5 m/s | 3.5 |
| 1989 | 1.2°C | -3.8°C | -8.7°C | 14.1°C | -20.2°C | 42 mm | 84% | 0.6 m/s | 3.3 |
| 1988 | 2.6°C | -1.9°C | -6.4°C | 11.8°C | -16.9°C | 25 mm | 82% | 0.6 m/s | 3.3 |
| 1987 | 2.7°C | -2.0°C | -6.7°C | 13.8°C | -16.2°C | 34 mm | 84% | 0.5 m/s | 3.3 |
| 1986 | 2.7°C | -2.5°C | -7.8°C | 17.1°C | -16.5°C | 45 mm | 84% | 0.6 m/s | 3.6 |
| 1985 | 1.1°C | -3.5°C | -8.1°C | 9.5°C | -17.9°C | 81 mm | 82% | 0.7 m/s | 3.3 |
| 1984 | 0.6°C | -2.8°C | -6.2°C | 14.1°C | -20.0°C | 121 mm | 86% | 0.7 m/s | 3.4 |
| 1983 | 3.0°C | -0.8°C | -4.5°C | 12.2°C | -13.0°C | 122 mm | 88% | 0.6 m/s | — |
| 1982 | 2.2°C | -2.3°C | -6.9°C | 11.2°C | -21.4°C | 58 mm | 83% | 0.6 m/s | — |
| 1981 | 3.8°C | 0.2°C | -3.4°C | 9.1°C | -7.5°C | 40 mm | 82% | 0.6 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 2.4°C with lows near -6°C (mean -1.8°C), based on 45 years of NASA POWER data.
March averages 66 mm of rainfall in Truro, one of the drier months. The wettest on record was 143 mm in 2003.
The hottest March reached 20.1°C in 2012. The coldest dipped to -21.4°C in 1982.
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 2.1°C to 3.8°C and overnight lows from -5.8°C to -4.2°C over the same span.
March is one of the cooler months of the year in Truro and one of the drier months, so plan for around 2.4°C daytime highs and -6°C at night.
Not quite — March is the 4th coolest month in Truro, averaging -1.8°C.
For March in Truro, pack warm layers and a jacket for chilly mornings, with typical highs of 2.4°C and lows of -6°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 84% — quite humid.
Average wind speed in March is 0.6 m/s. The windiest March on record averaged 0.8 m/s (2011).
The wettest March on record was 2003 with 143 mm. On average, March sees 66 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 Truro 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.
