March is one of the cooler months of the year in Mount Vernon, with average highs near 7.9°C and lows around -1.6°C (mean 3.2°C). It is about average for rainfall, averaging 103 mm of rainfall and 82% relative humidity across the period.
March is one of the cooler months of the year in Mount Vernon. Across 45 years of records, the warmest March in Mount Vernon was 2012 — when the month averaged 7.8°C — while the coldest was 1984 at -1°C. Typical March days reach 7.9°C with nights near -1.6°C. The long-term trend is warming, about 0.4°C per decade.
March is about average for rainfall in Mount Vernon, averaging 103 mm of rainfall. The wettest March on record was 2024 with 231 mm, while the driest was 2006 at 22 mm.
Relative humidity in Mount Vernon during March averages 82%. The most humid March was 1993 at 89%, and the least humid was 1985 at 74%.
March receives about 3.9 kWh/m²/day of solar energy in Mount Vernon. The sunniest March was 1988 at 4.7 kWh/m²/day, and the cloudiest was 1984 at 3.3.
Average wind speed in Mount Vernon during March is 2 m/s. The windiest March was 1999 at 2.5 m/s, while the calmest was 1995 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 2.6°C | 2.6°C | 3.2°C | 2.9°C | 5.0°C | +2.4°C |
| Avg High | 7.4°C | 7.3°C | 8.0°C | 7.5°C | 9.9°C | +2.5°C |
| Avg Low | -2.2°C | -2.0°C | -1.6°C | -1.6°C | 0.1°C | +2.3°C |
| Avg Rain | 91 mm | 110 mm | 95 mm | 106 mm | 114 mm | +23 mm |
March temperatures in Mount Vernon have risen by about 2.5°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -20°C (2015) to a record high of 24.2°C (1998).
Rainfall in March is about average for rainfall, averaging 103 mm, with a wettest year of 231 mm.
A quieter season to visit Mount Vernon
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Mount Vernon. That said, March — with days averaging 7.9°C and nights around -1.6°C (mean 3.2°C) and higher rainfall (103 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 | 11.2°C | 5.7°C | 0.3°C | 23.0°C | -7.1°C | 105 mm | 78% | 2.1 m/s | 4.1 |
| 2024 🌧️ | 10.3°C | 5.7°C | 1.2°C | 19.6°C | -4.6°C | 231 mm | 84% | 2 m/s | 3.9 |
| 2023 | 8.6°C | 3.9°C | -0.7°C | 14.0°C | -3.8°C | 92 mm | 81% | 2.1 m/s | 3.9 |
| 2022 | 9.2°C | 4.4°C | -0.5°C | 20.8°C | -7.1°C | 82 mm | 81% | 2 m/s | 3.8 |
| 2021 | 9.6°C | 4.4°C | -0.8°C | 22.2°C | -7.9°C | 78 mm | 80% | 2 m/s | 4.4 |
| 2020 | 10.6°C | 5.8°C | 1.0°C | 18.2°C | -6.2°C | 97 mm | 82% | 1.9 m/s | 3.8 |
| 2019 | 6.3°C | 1.8°C | -2.6°C | 16.3°C | -13.4°C | 93 mm | 84% | 1.9 m/s | 4.1 |
| 2018 | 5.8°C | 2.0°C | -1.8°C | 13.0°C | -5.8°C | 109 mm | 84% | 2.4 m/s | 3.8 |
| 2017 | 5.6°C | 1.1°C | -3.4°C | 17.0°C | -12.5°C | 135 mm | 80% | 2.4 m/s | 3.7 |
| 2016 | 11.2°C | 6.0°C | 0.9°C | 21.2°C | -5.2°C | 46 mm | 80% | 1.9 m/s | 4.2 |
| 2015 | 4.2°C | -0.3°C | -4.7°C | 12.6°C | -20.0°C | 113 mm | 84% | 1.8 m/s | 3.6 |
| 2014 | 5.0°C | 0.2°C | -4.7°C | 14.3°C | -14.4°C | 91 mm | 78% | 2.1 m/s | 3.7 |
| 2013 | 5.9°C | 2.0°C | -1.9°C | 12.2°C | -5.2°C | 65 mm | 82% | 2.1 m/s | 3.7 |
| 2012 🔥 | 12.7°C | 7.8°C | 2.8°C | 22.1°C | -5.5°C | 29 mm | 83% | 1.8 m/s | 3.9 |
| 2011 | 7.6°C | 3.0°C | -1.6°C | 18.6°C | -8.2°C | 153 mm | 82% | 2.1 m/s | 4.3 |
| 2010 | 10.4°C | 5.8°C | 1.3°C | 19.6°C | -4.4°C | 230 mm | 85% | 2.2 m/s | 3.5 |
| 2009 | 8.2°C | 3.3°C | -1.5°C | 17.9°C | -12.5°C | 48 mm | 82% | 1.8 m/s | 3.8 |
| 2008 | 8.0°C | 3.3°C | -1.4°C | 14.3°C | -4.6°C | 136 mm | 82% | 2.1 m/s | 4 |
| 2007 | 7.3°C | 2.1°C | -3.1°C | 20.1°C | -13.8°C | 116 mm | 84% | 2.1 m/s | 4.2 |
| 2006 | 8.0°C | 3.1°C | -1.8°C | 18.5°C | -8.1°C | 22 mm | 80% | 2 m/s | 4.4 |
| 2005 | 5.6°C | 1.1°C | -3.3°C | 15.6°C | -9.2°C | 96 mm | 84% | 2 m/s | 3.8 |
| 2004 | 8.1°C | 3.6°C | -0.9°C | 18.8°C | -6.2°C | 79 mm | 85% | 1.9 m/s | 3.5 |
| 2003 | 8.3°C | 3.0°C | -2.3°C | 18.1°C | -13.6°C | 101 mm | 86% | 1.8 m/s | 4 |
| 2002 | 9.8°C | 4.8°C | -0.3°C | 19.1°C | -6.3°C | 96 mm | 76% | 2.1 m/s | 3.6 |
| 2001 | 5.9°C | 1.9°C | -2.0°C | 12.2°C | -5.6°C | 156 mm | 83% | 2.1 m/s | 3.4 |
| 2000 | 10.9°C | 5.6°C | 0.3°C | 18.7°C | -7.5°C | 96 mm | 81% | 2 m/s | 4.1 |
| 1999 | 8.1°C | 2.9°C | -2.2°C | 18.2°C | -9.7°C | 110 mm | 79% | 2.5 m/s | 4.3 |
| 1998 | 8.6°C | 4.4°C | 0.2°C | 24.2°C | -8.8°C | 119 mm | 85% | 2 m/s | 3.8 |
| 1997 | 7.2°C | 2.8°C | -1.5°C | 17.0°C | -6.3°C | 140 mm | 83% | 2.2 m/s | 3.6 |
| 1996 | 5.0°C | 0.4°C | -4.2°C | 13.4°C | -16.4°C | 90 mm | 83% | 2 m/s | 3.7 |
| 1995 | 9.0°C | 4.0°C | -1.0°C | 17.6°C | -9.7°C | 49 mm | 83% | 1.7 m/s | 4.3 |
| 1994 | 5.7°C | 1.4°C | -2.9°C | 17.2°C | -11.5°C | 145 mm | 88% | 2 m/s | 3.6 |
| 1993 | 5.1°C | 0.7°C | -3.7°C | 16.2°C | -16.3°C | 162 mm | 89% | 2 m/s | 3.4 |
| 1992 | 6.4°C | 1.8°C | -2.8°C | 14.7°C | -9.0°C | 96 mm | 81% | 2.2 m/s | 3.6 |
| 1991 | 8.7°C | 4.0°C | -0.8°C | 18.6°C | -7.1°C | 115 mm | 84% | 2.2 m/s | 3.5 |
| 1990 | 9.0°C | 4.0°C | -1.0°C | 21.7°C | -13.3°C | 76 mm | 83% | 1.8 m/s | 3.9 |
| 1989 | 6.8°C | 2.0°C | -2.8°C | 21.8°C | -13.3°C | 103 mm | 83% | 2 m/s | 3.4 |
| 1988 | 8.2°C | 3.0°C | -2.2°C | 17.4°C | -9.9°C | 60 mm | 81% | 1.9 m/s | 4.7 |
| 1987 | 9.0°C | 4.0°C | -0.9°C | 20.1°C | -11.0°C | 99 mm | 84% | 1.9 m/s | 4.2 |
| 1986 | 8.3°C | 3.0°C | -2.3°C | 18.5°C | -13.2°C | 65 mm | 84% | 2 m/s | 4.6 |
| 1985 | 9.2°C | 4.1°C | -1.0°C | 19.6°C | -6.0°C | 56 mm | 74% | 2.1 m/s | 4.3 |
| 1984 ❄️ | 3.2°C | -1.0°C | -5.1°C | 12.2°C | -16.3°C | 142 mm | 86% | 2.3 m/s | 3.3 |
| 1983 | 8.2°C | 3.9°C | -0.5°C | 14.8°C | -6.4°C | 204 mm | 84% | 2.4 m/s | — |
| 1982 | 7.0°C | 2.1°C | -2.8°C | 13.0°C | -11.5°C | 69 mm | 83% | 1.9 m/s | — |
| 1981 | 7.0°C | 2.3°C | -2.3°C | 19.8°C | -8.7°C | 25 mm | 79% | 2.1 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 7.9°C with lows near -1.6°C (mean 3.2°C), based on 45 years of NASA POWER data.
March averages 103 mm of rainfall in Mount Vernon, about average for rainfall. The wettest on record was 231 mm in 2024.
The hottest March reached 24.2°C in 1998. The coldest dipped to -20°C in 2015.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 2.5°C. Daytime highs moved from 6.9°C to 9.8°C and overnight lows from -2.3°C to -0.1°C over the same span.
March is one of the cooler months of the year in Mount Vernon and about average for rainfall, so plan for around 7.9°C daytime highs and -1.6°C at night.
Not quite — March is the 4th coolest month in Mount Vernon, averaging 3.2°C.
For March in Mount Vernon, pack warm layers and a jacket for chilly mornings, with typical highs of 7.9°C and lows of -1.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 82% — quite humid.
Average wind speed in March is 2 m/s. The windiest March on record averaged 2.5 m/s (1999).
The wettest March on record was 2024 with 231 mm. On average, March sees 103 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 Mount Vernon 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.
