March is one of the cooler months of the year in Sudbury, with average highs near -0.8°C and lows around -11.1°C (mean -5.9°C). It is one of the drier months, averaging 51 mm of rainfall and 91% relative humidity across the period.
March is one of the cooler months of the year in Sudbury. Across 45 years of records, the warmest March in Sudbury was 2012 — when the month averaged 0.7°C — while the coldest was 2014 at -12.4°C. Typical March days reach -0.8°C with nights near -11.1°C. The long-term trend is warming, about 0.5°C per decade.
March is one of the drier months in Sudbury, averaging 51 mm of rainfall. The wettest March on record was 2025 with 100 mm, while the driest was 2010 at 3 mm.
Relative humidity in Sudbury during March averages 91%. The most humid March was 2001 at 98%, and the least humid was 2021 at 77%.
March receives about 3.6 kWh/m²/day of solar energy in Sudbury. The sunniest Marchs were 1999 and 2010 at 4.3 kWh/m²/day, and the cloudiest was 2024 at 3.
Average wind speed in Sudbury during March is 1.3 m/s. The windiest March was 2021 at 1.6 m/s, while the calmest were 2001 and 2014 at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -7.2°C | -5.8°C | -6.4°C | -5.8°C | -3.8°C | +3.4°C |
| Avg High | -2.2°C | -0.6°C | -1.3°C | -0.7°C | 1.3°C | +3.5°C |
| Avg Low | -12.1°C | -11.0°C | -11.5°C | -11.0°C | -9.0°C | +3.1°C |
| Avg Rain | 65 mm | 40 mm | 52 mm | 45 mm | 58 mm | -7 mm |
March temperatures in Sudbury have risen by about 3.4°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -39.5°C (2003) to a record high of 20.9°C (2012).
Rainfall in March is one of the drier months, averaging 51 mm, with a wettest year of 100 mm.
A quieter season to visit Sudbury
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Sudbury. That said, March — with days averaging -0.8°C and nights around -11.1°C (mean -5.9°C) and moderate rainfall (51 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 🌧️ | 0.1°C | -4.6°C | -9.4°C | 8.1°C | -28.2°C | 100 mm | 90% | 1.4 m/s | 3.2 |
| 2024 | 3.7°C | -1.0°C | -5.7°C | 13.2°C | -15.1°C | 54 mm | 81% | 1.4 m/s | 3 |
| 2023 | -0.1°C | -5.2°C | -10.3°C | 4.7°C | -18.7°C | 43 mm | 86% | 1.4 m/s | 3.5 |
| 2022 | -1.2°C | -6.2°C | -11.1°C | 7.8°C | -26.8°C | 59 mm | 91% | 1.3 m/s | 3.1 |
| 2021 | 4.3°C | -1.7°C | -7.8°C | 13.7°C | -20.6°C | 33 mm | 77% | 1.6 m/s | 3.6 |
| 2020 | 1.1°C | -4.4°C | -9.9°C | 10.6°C | -20.1°C | 60 mm | 91% | 1.2 m/s | 3.3 |
| 2019 | -3.5°C | -8.2°C | -12.9°C | 2.2°C | -28.1°C | 43 mm | 96% | 1.3 m/s | 3.6 |
| 2018 | -0.5°C | -5.4°C | -10.3°C | 6.5°C | -16.6°C | 24 mm | 85% | 1.3 m/s | 3.9 |
| 2017 | -1.9°C | -7.3°C | -12.7°C | 7.8°C | -28.9°C | 52 mm | 86% | 1.4 m/s | 3.8 |
| 2016 | -0.1°C | -4.5°C | -8.8°C | 5.4°C | -28.5°C | 94 mm | 92% | 1.2 m/s | 3.3 |
| 2015 | -3.2°C | -8.7°C | -14.1°C | 1.7°C | -27.3°C | 34 mm | 94% | 1.3 m/s | 3.8 |
| 2014 ❄️ | -6.2°C | -12.4°C | -18.5°C | 0.3°C | -31.9°C | 44 mm | 98% | 1.1 m/s | 3.7 |
| 2013 | -1.4°C | -5.6°C | -9.7°C | 8.5°C | -20.7°C | 49 mm | 92% | 1.3 m/s | 3.3 |
| 2012 🔥 | 6.3°C | 0.7°C | -4.9°C | 20.9°C | -30.9°C | 57 mm | 87% | 1.3 m/s | 3.1 |
| 2011 | -1.4°C | -6.7°C | -12.1°C | 8.0°C | -24.2°C | 52 mm | 86% | 1.3 m/s | 3.9 |
| 2010 | 5.3°C | -0.4°C | -6.0°C | 14.8°C | -18.2°C | 3 mm | 82% | 1.2 m/s | 4.3 |
| 2009 | -1.5°C | -6.6°C | -11.7°C | 4.0°C | -30.9°C | 58 mm | 93% | 1.3 m/s | 3.7 |
| 2008 | -3.6°C | -8.7°C | -13.9°C | 1.6°C | -21.6°C | 46 mm | 93% | 1.3 m/s | 3.8 |
| 2007 | 0.7°C | -4.9°C | -10.4°C | 16.3°C | -39.1°C | 57 mm | 88% | 1.4 m/s | 3.6 |
| 2006 | -1.5°C | -6.1°C | -10.7°C | 11.4°C | -26.4°C | 42 mm | 96% | 1.2 m/s | 3.8 |
| 2005 | -2.4°C | -7.6°C | -12.8°C | 11.0°C | -25.1°C | 25 mm | 93% | 1.2 m/s | 4.2 |
| 2004 | 0.1°C | -5.0°C | -10.0°C | 11.6°C | -21.0°C | 61 mm | 93% | 1.3 m/s | 3.3 |
| 2003 | -2.3°C | -7.8°C | -13.2°C | 9.4°C | -39.5°C | 65 mm | 93% | 1.2 m/s | 3.5 |
| 2002 | -3.8°C | -8.9°C | -14.0°C | 2.8°C | -26.4°C | 85 mm | 96% | 1.3 m/s | 3.4 |
| 2001 | -3.2°C | -7.7°C | -12.3°C | 2.0°C | -24.4°C | 36 mm | 98% | 1.1 m/s | 3.7 |
| 2000 | 4.6°C | -0.5°C | -5.6°C | 15.4°C | -15.5°C | 43 mm | 84% | 1.3 m/s | 3.2 |
| 1999 | 0.8°C | -4.5°C | -9.9°C | 16.1°C | -24.6°C | 13 mm | 85% | 1.4 m/s | 4.3 |
| 1998 | 0.5°C | -4.3°C | -9.2°C | 18.6°C | -27.1°C | 93 mm | 90% | 1.5 m/s | 3.4 |
| 1997 | -4.2°C | -9.3°C | -14.3°C | 3.0°C | -24.5°C | 31 mm | 97% | 1.3 m/s | 3.8 |
| 1996 | -4.0°C | -9.1°C | -14.2°C | 4.5°C | -26.4°C | 25 mm | 91% | 1.4 m/s | 3.9 |
| 1995 | 1.7°C | -3.4°C | -8.5°C | 15.0°C | -26.9°C | 35 mm | 86% | 1.4 m/s | 3.2 |
| 1994 | 1.6°C | -3.5°C | -8.6°C | 8.2°C | -15.5°C | 27 mm | 84% | 1.3 m/s | 3.6 |
| 1993 | 0.4°C | -4.9°C | -10.2°C | 17.5°C | -25.4°C | 16 mm | 88% | 1.2 m/s | 3.6 |
| 1992 | -4.1°C | -9.3°C | -14.6°C | 3.5°C | -24.5°C | 52 mm | 94% | 1.3 m/s | 4.1 |
| 1991 | 0.6°C | -4.8°C | -10.2°C | 12.5°C | -24.8°C | 85 mm | 89% | 1.5 m/s | 3.5 |
| 1990 | 0.5°C | -4.7°C | -10.0°C | 8.1°C | -25.7°C | 25 mm | 85% | 1.2 m/s | 3.6 |
| 1989 | -4.7°C | -10.0°C | -15.4°C | 6.0°C | -31.7°C | 65 mm | 96% | 1.2 m/s | 3.6 |
| 1988 | -3.0°C | -8.5°C | -14.0°C | 7.4°C | -32.2°C | 78 mm | 94% | 1.3 m/s | 3.5 |
| 1987 | 1.3°C | -4.0°C | -9.2°C | 15.7°C | -27.1°C | 41 mm | 91% | 1.2 m/s | 3.6 |
| 1986 | -1.8°C | -6.7°C | -11.5°C | 9.2°C | -30.4°C | 87 mm | 96% | 1.3 m/s | 3.2 |
| 1985 | -3.7°C | -8.3°C | -12.9°C | 0.4°C | -24.6°C | 90 mm | 98% | 1.4 m/s | 3.2 |
| 1984 | -5.3°C | -10.6°C | -15.9°C | 2.3°C | -32.2°C | 35 mm | 97% | 1.3 m/s | 3.8 |
| 1983 | -0.6°C | -4.9°C | -9.2°C | 7.6°C | -23.2°C | 89 mm | 92% | 1.4 m/s | — |
| 1982 | -3.8°C | -8.7°C | -13.6°C | 3.6°C | -31.5°C | 63 mm | 98% | 1.4 m/s | — |
| 1981 | 1.7°C | -2.9°C | -7.6°C | 11.1°C | -19.6°C | 36 mm | 85% | 1.2 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around -0.8°C with lows near -11.1°C (mean -5.9°C), based on 45 years of NASA POWER data.
March averages 51 mm of rainfall in Sudbury, one of the drier months. The wettest on record was 100 mm in 2025.
The hottest March reached 20.9°C in 2012. The coldest dipped to -39.5°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 3.4°C. Daytime highs moved from -2.3°C to 1.4°C and overnight lows from -11.8°C to -8.9°C over the same span.
March is one of the cooler months of the year in Sudbury and one of the drier months, so plan for around -0.8°C daytime highs and -11.1°C at night.
Not quite — March is the 4th coolest month in Sudbury, averaging -5.9°C.
For March in Sudbury, pack warm layers and a jacket for chilly mornings, with typical highs of -0.8°C and lows of -11.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 91% — quite humid.
Average wind speed in March is 1.3 m/s. The windiest March on record averaged 1.6 m/s (2021).
The wettest March on record was 2025 with 100 mm. On average, March sees 51 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 Sudbury 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.
