March is one of the cooler months of the year in Oakville, with average highs near 3.6°C and lows around -2.5°C (mean 0.6°C). It is one of the drier months, averaging 44 mm of rainfall and 80% relative humidity across the period.
March is one of the cooler months of the year in Oakville. Across 45 years of records, the warmest March in Oakville was 2012 — when the month averaged 6°C — while the coldest was 2014 at -3.9°C. Typical March days reach 3.6°C with nights near -2.5°C. The long-term trend is warming, about 0.6°C per decade.
March is one of the drier months in Oakville, averaging 44 mm of rainfall. The wettest March on record was 2011 with 86 mm, while the driest was 1981 at 11 mm.
Relative humidity in Oakville during March averages 80%. The most humid March was 2003 at 85%, and the least humid was 2021 at 72%.
March receives about 3.3 kWh/m²/day of solar energy in Oakville. The sunniest Marchs were 1999, 2009 and 2021 at 4 kWh/m²/day, and the cloudiest was 2004 at 2.7.
Average wind speed in Oakville during March is 4.6 m/s. The windiest March was 2017 at 5.6 m/s, while the calmest was 1995 at 3.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -0.3°C | -0.2°C | 0.8°C | 0.7°C | 2.7°C | +3°C |
| Avg High | 3.0°C | 3.2°C | 3.5°C | 3.6°C | 5.7°C | +2.7°C |
| Avg Low | -3.7°C | -3.5°C | -2.0°C | -2.1°C | -0.4°C | +3.3°C |
| Avg Rain | 41 mm | 30 mm | 54 mm | 51 mm | 41 mm | 0 mm |
March temperatures in Oakville have risen by about 3.2°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -21.4°C (2003) to a record high of 19.9°C (2012).
Rainfall in March is one of the drier months, averaging 44 mm, with a wettest year of 86 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.7°C per decade, narrowing the gap between day and night.
A quieter season to visit Oakville
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Oakville. That said, March — with days averaging 3.6°C and nights around -2.5°C (mean 0.6°C) and moderate rainfall (44 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 | 6.1°C | 2.6°C | -0.9°C | 14.6°C | -10.1°C | 46 mm | 78% | 5.3 m/s | 3.5 |
| 2024 | 6.5°C | 3.7°C | 0.9°C | 15.0°C | -4.2°C | 39 mm | 78% | 4.6 m/s | 3.5 |
| 2023 | 4.2°C | 1.8°C | -0.7°C | 9.4°C | -4.6°C | 52 mm | 79% | 5.2 m/s | 3.4 |
| 2022 | 4.5°C | 1.7°C | -1.0°C | 13.2°C | -7.2°C | 42 mm | 80% | 5 m/s | 3.2 |
| 2021 | 7.0°C | 3.2°C | -0.7°C | 14.1°C | -6.8°C | 28 mm | 72% | 4.9 m/s | 4 |
| 2020 | 5.7°C | 2.9°C | 0.1°C | 14.6°C | -6.0°C | 37 mm | 82% | 4.6 m/s | 3.1 |
| 2019 | 2.8°C | 0.0°C | -2.8°C | 10.2°C | -10.2°C | 46 mm | 78% | 4.8 m/s | 3.2 |
| 2018 | 2.6°C | 0.4°C | -1.8°C | 6.5°C | -5.3°C | 42 mm | 78% | 5.1 m/s | 3.7 |
| 2017 | 3.0°C | 0.4°C | -2.2°C | 11.6°C | -8.7°C | 70 mm | 80% | 5.6 m/s | 3.3 |
| 2016 | 4.8°C | 2.1°C | -0.6°C | 12.1°C | -8.3°C | 84 mm | 83% | 4 m/s | 3.1 |
| 2015 | 1.0°C | -2.6°C | -6.3°C | 6.5°C | -18.8°C | 27 mm | 80% | 4 m/s | 3.8 |
| 2014 ❄️ | -0.2°C | -3.9°C | -7.5°C | 8.2°C | -15.4°C | 38 mm | 81% | 4.6 m/s | 3.3 |
| 2013 | 3.0°C | 0.6°C | -1.7°C | 10.4°C | -6.8°C | 25 mm | 80% | 5 m/s | 3.3 |
| 2012 🔥 | 9.4°C | 6.0°C | 2.6°C | 19.9°C | -8.8°C | 38 mm | 81% | 4.5 m/s | 3.7 |
| 2011 🌧️ | 3.1°C | 0.5°C | -2.0°C | 10.5°C | -7.3°C | 86 mm | 80% | 4.8 m/s | 3.3 |
| 2010 | 6.8°C | 3.8°C | 0.9°C | 13.5°C | -4.1°C | 58 mm | 78% | 4.2 m/s | 3.6 |
| 2009 | 4.1°C | 1.4°C | -1.4°C | 10.8°C | -11.1°C | 76 mm | 79% | 4.3 m/s | 4 |
| 2008 | 2.3°C | 0.0°C | -2.3°C | 9.2°C | -7.9°C | 79 mm | 79% | 5.1 m/s | 3.2 |
| 2007 | 3.9°C | 1.1°C | -1.7°C | 16.8°C | -16.1°C | 49 mm | 81% | 5.2 m/s | 3.2 |
| 2006 | 4.4°C | 1.6°C | -1.1°C | 15.2°C | -7.4°C | 48 mm | 77% | 4.6 m/s | 3.9 |
| 2005 | 2.0°C | -0.3°C | -2.6°C | 11.0°C | -9.9°C | 26 mm | 82% | 4.5 m/s | 3.3 |
| 2004 | 4.5°C | 2.2°C | -0.2°C | 12.9°C | -7.9°C | 64 mm | 84% | 4.5 m/s | 2.7 |
| 2003 | 2.4°C | -1.4°C | -5.2°C | 14.1°C | -21.4°C | 57 mm | 85% | 3.7 m/s | 3.2 |
| 2002 | 3.1°C | -0.1°C | -3.4°C | 11.8°C | -9.7°C | 69 mm | 81% | 5 m/s | 3.3 |
| 2001 | 2.0°C | -0.7°C | -3.4°C | 6.8°C | -8.6°C | 41 mm | 83% | 4 m/s | 2.8 |
| 2000 | 6.5°C | 3.7°C | 0.8°C | 14.0°C | -3.1°C | 25 mm | 79% | 4.4 m/s | 2.9 |
| 1999 | 2.9°C | -0.7°C | -4.3°C | 12.1°C | -14.4°C | 28 mm | 79% | 4.7 m/s | 4 |
| 1998 | 4.1°C | 1.3°C | -1.5°C | 16.7°C | -10.6°C | 51 mm | 83% | 4.8 m/s | 3.2 |
| 1997 | 2.7°C | -0.6°C | -4.0°C | 13.0°C | -8.9°C | 47 mm | 80% | 4.7 m/s | 3.2 |
| 1996 | 1.3°C | -2.1°C | -5.4°C | 10.6°C | -12.6°C | 14 mm | 75% | 4.6 m/s | 3.7 |
| 1995 | 5.2°C | 1.3°C | -2.7°C | 14.9°C | -11.6°C | 35 mm | 78% | 3.6 m/s | 3.2 |
| 1994 | 2.9°C | -0.5°C | -4.0°C | 11.9°C | -9.6°C | 24 mm | 81% | 3.9 m/s | 3.4 |
| 1993 | 1.8°C | -1.2°C | -4.3°C | 13.2°C | -13.6°C | 16 mm | 84% | 4.3 m/s | 3 |
| 1992 | 2.2°C | -1.0°C | -4.2°C | 9.3°C | -11.0°C | 21 mm | 76% | 4.6 m/s | 3.5 |
| 1991 | 4.4°C | 1.0°C | -2.4°C | 11.8°C | -9.4°C | 47 mm | 81% | 4.5 m/s | 3.1 |
| 1990 | 4.0°C | 0.7°C | -2.5°C | 13.9°C | -9.9°C | 16 mm | 79% | 4.1 m/s | 3 |
| 1989 | 2.2°C | -1.0°C | -4.2°C | 13.4°C | -14.4°C | 28 mm | 79% | 4.4 m/s | 3 |
| 1988 | 3.2°C | -0.5°C | -4.2°C | 11.5°C | -12.8°C | 18 mm | 77% | 4.3 m/s | 3.4 |
| 1987 | 4.9°C | 1.4°C | -2.1°C | 11.3°C | -13.5°C | 21 mm | 80% | 3.7 m/s | 3.5 |
| 1986 | 3.7°C | 0.0°C | -3.7°C | 13.5°C | -16.3°C | 24 mm | 84% | 4.7 m/s | 3.4 |
| 1985 | 3.3°C | -0.4°C | -4.1°C | 10.1°C | -11.8°C | 75 mm | 81% | 5 m/s | 3.3 |
| 1984 | -0.2°C | -3.4°C | -6.5°C | 6.9°C | -15.5°C | 53 mm | 84% | 4.8 m/s | 3.2 |
| 1983 | 3.6°C | 0.8°C | -2.1°C | 9.5°C | -11.3°C | 67 mm | 85% | 4 m/s | — |
| 1982 | 2.3°C | -0.8°C | -3.9°C | 11.3°C | -13.7°C | 74 mm | 85% | 4.8 m/s | — |
| 1981 | 4.2°C | 0.9°C | -2.5°C | 13.4°C | -8.5°C | 11 mm | 77% | 4.4 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 3.6°C with lows near -2.5°C (mean 0.6°C), based on 45 years of NASA POWER data.
March averages 44 mm of rainfall in Oakville, one of the drier months. The wettest on record was 86 mm in 2011.
The hottest March reached 19.9°C in 2012. The coldest dipped to -21.4°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 3.2°C. Daytime highs moved from 2.6°C to 5.7°C and overnight lows from -3.8°C to -0.5°C over the same span.
March is one of the cooler months of the year in Oakville and one of the drier months, so plan for around 3.6°C daytime highs and -2.5°C at night.
Not quite — March is the 4th coolest month in Oakville, averaging 0.6°C.
For March in Oakville, pack warm layers and a jacket for chilly mornings, with typical highs of 3.6°C and lows of -2.5°C.
Relative humidity in March averages 80% — quite humid.
Average wind speed in March is 4.6 m/s. The windiest March on record averaged 5.6 m/s (2017).
The wettest March on record was 2011 with 86 mm. On average, March sees 44 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 Oakville 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.
