March is one of the cooler months of the year in Penzance, with average highs near 9.8°C and lows around 8.3°C (mean 9.1°C). It is about average for rainfall, averaging 79 mm of rainfall and 84% relative humidity across the period.
March is one of the cooler months of the year in Penzance. Across 45 years of records, the warmest March in Penzance was 2017 — when the month averaged 10.1°C — while the coldest was 2013 at 6.9°C. Typical March days reach 9.8°C with nights near 8.3°C. The long-term March temperature trend is broadly flat.
March is about average for rainfall in Penzance, averaging 79 mm of rainfall. The wettest March on record was 2018 with 156 mm, while the driest was 1990 at 23 mm.
Relative humidity in Penzance during March averages 84%. The most humid March was 1997 at 89%, and the least humid was 2016 at 80%.
March receives about 2.8 kWh/m²/day of solar energy in Penzance. 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 Penzance during March is 6.8 m/s. The windiest March was 2008 at 8.4 m/s, while the calmest was 2011 at 5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.6°C | 9.2°C | 9.2°C | 8.8°C | 9.7°C | +1.1°C |
| Avg High | 9.4°C | 9.9°C | 9.9°C | 9.6°C | 10.4°C | +1°C |
| Avg Low | 7.8°C | 8.4°C | 8.4°C | 8.0°C | 8.9°C | +1.1°C |
| Avg Rain | 98 mm | 63 mm | 75 mm | 82 mm | 77 mm | -20 mm |
March temperatures in Penzance have risen by about 1.2°C between 1981–1985 and 2021–2025.
March has ranged from a record low of 0.3°C (2018) to a record high of 12.9°C (2012).
Rainfall in March is about average for rainfall, averaging 79 mm, with a wettest year of 156 mm.
A quieter season to visit Penzance
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Penzance. That said, March — with days averaging 9.8°C and nights around 8.3°C (mean 9.1°C) and moderate rainfall (79 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 | 10.6°C | 9.9°C | 9.3°C | 12.1°C | 6.8°C | 33 mm | 84% | 5.6 m/s | 3.2 |
| 2024 | 10.8°C | 10.0°C | 9.3°C | 12.2°C | 7.1°C | 127 mm | 86% | 6.9 m/s | 2.7 |
| 2023 | 10.5°C | 9.8°C | 9.0°C | 12.5°C | 4.7°C | 144 mm | 86% | 7.5 m/s | 2.4 |
| 2022 | 10.7°C | 9.9°C | 9.2°C | 12.8°C | 6.2°C | 49 mm | 84% | 6.6 m/s | 3.2 |
| 2021 | 10.1°C | 9.5°C | 8.8°C | 12.1°C | 5.8°C | 41 mm | 83% | 6.4 m/s | 2.9 |
| 2020 | 9.9°C | 8.9°C | 8.0°C | 11.1°C | 5.7°C | 70 mm | 83% | 7.8 m/s | 3.2 |
| 2019 | 10.8°C | 9.9°C | 9.0°C | 12.4°C | 6.9°C | 106 mm | 85% | 7.3 m/s | 2.9 |
| 2018 🌧️ | 8.6°C | 7.7°C | 6.8°C | 10.8°C | 0.3°C | 156 mm | 84% | 7.1 m/s | 2.5 |
| 2017 🔥 | 10.8°C | 10.1°C | 9.4°C | 12.3°C | 7.2°C | 108 mm | 87% | 7.3 m/s | 2.5 |
| 2016 | 9.3°C | 8.5°C | 7.6°C | 11.2°C | 6.1°C | 83 mm | 80% | 6.9 m/s | 3 |
| 2015 | 9.5°C | 8.7°C | 7.9°C | 11.3°C | 5.8°C | 62 mm | 83% | 6.8 m/s | 2.9 |
| 2014 | 9.7°C | 8.9°C | 8.2°C | 10.9°C | 5.9°C | 56 mm | 88% | 6.1 m/s | 2.6 |
| 2013 ❄️ | 7.7°C | 6.9°C | 6.1°C | 10.6°C | 1.6°C | 109 mm | 83% | 7.3 m/s | 2.5 |
| 2012 | 10.6°C | 9.9°C | 9.1°C | 12.9°C | 7.3°C | 25 mm | 86% | 5.4 m/s | 3.1 |
| 2011 | 9.8°C | 9.0°C | 8.3°C | 12.0°C | 5.4°C | 36 mm | 85% | 5 m/s | 3.1 |
| 2010 | 8.9°C | 8.2°C | 7.4°C | 10.9°C | 4.4°C | 76 mm | 83% | 6.6 m/s | 2.9 |
| 2009 | 9.8°C | 9.1°C | 8.4°C | 10.8°C | 5.7°C | 49 mm | 84% | 6.5 m/s | 3.3 |
| 2008 | 10.0°C | 9.2°C | 8.4°C | 11.9°C | 6.3°C | 95 mm | 81% | 8.4 m/s | 2.9 |
| 2007 | 10.5°C | 9.6°C | 8.7°C | 12.2°C | 5.7°C | 75 mm | 81% | 7.1 m/s | 3 |
| 2006 | 8.9°C | 8.1°C | 7.4°C | 11.3°C | 4.2°C | 105 mm | 85% | 8.2 m/s | 2.4 |
| 2005 | 9.5°C | 8.8°C | 8.1°C | 11.7°C | 3.9°C | 60 mm | 86% | 6.2 m/s | 2.5 |
| 2004 | 9.5°C | 8.8°C | 8.2°C | 11.4°C | 5.4°C | 74 mm | 83% | 7 m/s | 2.9 |
| 2003 | 10.4°C | 9.8°C | 9.1°C | 11.4°C | 7.5°C | 52 mm | 85% | 6.8 m/s | 3 |
| 2002 | 10.4°C | 9.8°C | 9.2°C | 11.9°C | 6.0°C | 79 mm | 87% | 6.4 m/s | 2.5 |
| 2001 | 10.0°C | 9.2°C | 8.4°C | 12.2°C | 4.3°C | 139 mm | 86% | 7.2 m/s | 2.4 |
| 2000 | 9.9°C | 9.1°C | 8.4°C | 11.2°C | 5.9°C | 27 mm | 84% | 5.7 m/s | 3 |
| 1999 | 9.7°C | 9.1°C | 8.4°C | 12.4°C | 6.0°C | 46 mm | 84% | 6.2 m/s | 2.9 |
| 1998 | 10.7°C | 10.0°C | 9.3°C | 12.5°C | 7.9°C | 84 mm | 85% | 6.5 m/s | 2.5 |
| 1997 | 10.6°C | 9.9°C | 9.2°C | 11.5°C | 7.3°C | 46 mm | 89% | 5.3 m/s | 2.9 |
| 1996 | 9.0°C | 8.2°C | 7.4°C | 11.3°C | 3.9°C | 78 mm | 84% | 6.2 m/s | 2.4 |
| 1995 | 9.5°C | 8.5°C | 7.6°C | 11.0°C | 5.5°C | 71 mm | 81% | 7.8 m/s | 2.7 |
| 1994 | 10.1°C | 9.4°C | 8.6°C | 11.2°C | 6.9°C | 87 mm | 87% | 7.8 m/s | 2.4 |
| 1993 | 9.4°C | 8.7°C | 8.0°C | 11.1°C | 3.9°C | 34 mm | 85% | 5.8 m/s | 2.4 |
| 1992 | 9.7°C | 9.0°C | 8.4°C | 10.7°C | 5.1°C | 51 mm | 86% | 7.5 m/s | 2.5 |
| 1991 | 10.0°C | 9.2°C | 8.4°C | 11.1°C | 6.2°C | 112 mm | 88% | 6.4 m/s | 2.5 |
| 1990 | 10.3°C | 9.6°C | 8.9°C | 11.8°C | 5.7°C | 23 mm | 84% | 5.9 m/s | 2.7 |
| 1989 | 10.5°C | 9.7°C | 8.9°C | 12.0°C | 6.9°C | 100 mm | 85% | 7.3 m/s | 2.4 |
| 1988 | 9.6°C | 8.9°C | 8.2°C | 11.1°C | 5.4°C | 130 mm | 86% | 7.4 m/s | 2.7 |
| 1987 | 8.8°C | 8.0°C | 7.2°C | 11.5°C | 4.8°C | 76 mm | 83% | 7.3 m/s | 2.7 |
| 1986 | 9.0°C | 8.0°C | 7.0°C | 11.2°C | 1.9°C | 91 mm | 85% | 7.4 m/s | 2.9 |
| 1985 | 8.9°C | 8.1°C | 7.2°C | 11.6°C | 5.2°C | 96 mm | 81% | 6.6 m/s | 2.7 |
| 1984 | 8.4°C | 7.5°C | 6.6°C | 10.2°C | 4.7°C | 65 mm | 81% | 5.8 m/s | 2.7 |
| 1983 | 9.4°C | 8.7°C | 7.9°C | 10.5°C | 6.3°C | 57 mm | 85% | 6.3 m/s | — |
| 1982 | 9.9°C | 8.8°C | 7.7°C | 11.6°C | 6.0°C | 114 mm | 81% | 7.5 m/s | — |
| 1981 | 10.4°C | 9.7°C | 9.1°C | 11.8°C | 6.7°C | 149 mm | 88% | 8.3 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 9.8°C with lows near 8.3°C (mean 9.1°C), based on 45 years of NASA POWER data.
March averages 79 mm of rainfall in Penzance, about average for rainfall. The wettest on record was 156 mm in 2018.
The hottest March reached 12.9°C in 2012. The coldest dipped to 0.3°C in 2018.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 1.2°C. Daytime highs moved from 9.4°C to 10.5°C and overnight lows from 7.7°C to 9.1°C over the same span.
March is one of the cooler months of the year in Penzance and about average for rainfall, so plan for around 9.8°C daytime highs and 8.3°C at night.
Not quite — March is the 2nd coolest month in Penzance, averaging 9.1°C.
For March in Penzance, pack light layers you can adjust through the day, with typical highs of 9.8°C and lows of 8.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 84% — quite humid.
Average wind speed in March is 6.8 m/s. The windiest March on record averaged 8.4 m/s (2008).
The wettest March on record was 2018 with 156 mm. On average, March sees 79 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 Penzance 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.
