October is one of the warmer months of the year in Sudbury, with average highs near 11.5°C and lows around 2°C (mean 6.8°C). It is a relatively wet time of year, averaging 82 mm of rainfall and 81% relative humidity across the period.
October is one of the warmer months of the year in Sudbury. Across 45 years of records, the warmest October in Sudbury was 2021 — when the month averaged 11.5°C — while the coldest were 1981 and 1993 at 3.9°C. Typical October days reach 11.5°C with nights near 2°C. The long-term trend is warming, about 0.6°C per decade.
October is a relatively wet time of year in Sudbury, averaging 82 mm of rainfall. The wettest October on record was 2014 with 164 mm, while the driest was 2005 at 35 mm.
Relative humidity in Sudbury during October averages 81%. The most humid October was 2014 at 88%, and the least humid was 2024 at 75%.
October receives about 2.3 kWh/m²/day of solar energy in Sudbury. The sunniest Octobers were 2010, 2024 and 2025 at 2.7 kWh/m²/day, and the cloudiest were 1995, 2014 and 2018, among others at 1.8.
Average wind speed in Sudbury during October is 0.6 m/s. The windiest Octobers were 2001, 2012 and 2019, among others at 0.7 m/s, while the calmest were 1984 and 2021 at 0.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.9°C | 6.3°C | 6.6°C | 7.2°C | 8.5°C | +2.6°C |
| Avg High | 10.7°C | 11.1°C | 11.2°C | 11.9°C | 13.4°C | +2.7°C |
| Avg Low | 1.1°C | 1.5°C | 2.0°C | 2.5°C | 3.7°C | +2.6°C |
| Avg Rain | 88 mm | 67 mm | 83 mm | 92 mm | 81 mm | -8 mm |
October temperatures in Sudbury have risen by about 3°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -7.6°C (2020) to a record high of 28°C (2023).
Rainfall in October is a relatively wet time of year, averaging 82 mm, with a wettest year of 164 mm.
A good time to visit Sudbury
October is a good time to visit Sudbury, with days averaging 11.5°C and nights around 2°C (mean 6.8°C, warmer than Sudbury's yearly average) and higher rainfall. July and August are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 14.6°C | 9.3°C | 4.0°C | 26.5°C | -3.6°C | 95 mm | 78% | 0.6 m/s | 2.7 |
| 2024 | 15.0°C | 9.5°C | 4.0°C | 23.5°C | -1.5°C | 72 mm | 75% | 0.6 m/s | 2.7 |
| 2023 | 13.1°C | 9.0°C | 4.8°C | 28.0°C | -3.8°C | 121 mm | 84% | 0.6 m/s | 2 |
| 2022 | 13.0°C | 7.8°C | 2.6°C | 22.6°C | -2.6°C | 57 mm | 81% | 0.6 m/s | 2.5 |
| 2021 🔥 | 16.3°C | 11.5°C | 6.6°C | 23.0°C | -3.5°C | 61 mm | 82% | 0.5 m/s | 2.2 |
| 2020 | 8.6°C | 4.2°C | -0.1°C | 15.5°C | -7.6°C | 79 mm | 81% | 0.6 m/s | 2.1 |
| 2019 | 11.3°C | 6.9°C | 2.5°C | 21.7°C | -3.0°C | 109 mm | 84% | 0.7 m/s | 2.3 |
| 2018 | 9.1°C | 4.7°C | 0.3°C | 23.2°C | -5.3°C | 117 mm | 83% | 0.6 m/s | 1.8 |
| 2017 | 14.5°C | 9.6°C | 4.7°C | 22.6°C | -2.3°C | 107 mm | 83% | 0.6 m/s | 2.6 |
| 2016 | 13.1°C | 8.3°C | 3.5°C | 23.7°C | -5.6°C | 72 mm | 78% | 0.6 m/s | 2.3 |
| 2015 | 10.7°C | 5.8°C | 1.0°C | 19.6°C | -4.5°C | 80 mm | 79% | 0.6 m/s | 2.3 |
| 2014 🌧️ | 10.6°C | 6.3°C | 2.1°C | 19.6°C | -4.1°C | 164 mm | 88% | 0.6 m/s | 1.8 |
| 2013 | 12.7°C | 7.8°C | 2.9°C | 21.8°C | -5.1°C | 78 mm | 80% | 0.6 m/s | 2.4 |
| 2012 | 11.7°C | 7.3°C | 2.8°C | 21.8°C | -4.0°C | 85 mm | 79% | 0.7 m/s | 2.1 |
| 2011 | 13.5°C | 8.5°C | 3.5°C | 25.7°C | -4.1°C | 74 mm | 78% | 0.6 m/s | 2.6 |
| 2010 | 12.2°C | 7.0°C | 1.8°C | 21.8°C | -5.2°C | 36 mm | 76% | 0.6 m/s | 2.7 |
| 2009 | 8.3°C | 4.4°C | 0.5°C | 14.8°C | -5.4°C | 121 mm | 86% | 0.6 m/s | 2 |
| 2008 | 11.0°C | 6.0°C | 1.1°C | 21.1°C | -5.5°C | 42 mm | 80% | 0.6 m/s | 2.6 |
| 2007 | 14.6°C | 9.8°C | 5.0°C | 25.8°C | -2.3°C | 97 mm | 84% | 0.6 m/s | 2 |
| 2006 | 9.4°C | 5.0°C | 0.7°C | 23.0°C | -5.0°C | 90 mm | 84% | 0.6 m/s | 2.1 |
| 2005 | 13.3°C | 8.6°C | 3.9°C | 26.3°C | -4.2°C | 35 mm | 81% | 0.6 m/s | 2.4 |
| 2004 | 12.8°C | 8.0°C | 3.1°C | 23.9°C | -4.1°C | 102 mm | 80% | 0.6 m/s | 2.4 |
| 2003 | 10.0°C | 5.7°C | 1.4°C | 21.7°C | -3.9°C | 69 mm | 86% | 0.6 m/s | 2.2 |
| 2002 | 9.2°C | 4.5°C | -0.3°C | 25.2°C | -5.4°C | 74 mm | 80% | 0.6 m/s | 2.3 |
| 2001 | 10.9°C | 6.7°C | 2.5°C | 20.0°C | -5.2°C | 137 mm | 86% | 0.7 m/s | 2 |
| 2000 | 12.7°C | 7.4°C | 2.1°C | 20.5°C | -6.0°C | 62 mm | 79% | 0.6 m/s | 2.3 |
| 1999 | 10.5°C | 5.5°C | 0.6°C | 17.5°C | -5.2°C | 60 mm | 79% | 0.6 m/s | 2.2 |
| 1998 | 13.0°C | 7.7°C | 2.3°C | 18.4°C | -2.9°C | 59 mm | 78% | 0.6 m/s | 2.5 |
| 1997 | 11.4°C | 6.6°C | 1.8°C | 22.2°C | -5.8°C | 40 mm | 80% | 0.6 m/s | 2.4 |
| 1996 | 10.8°C | 6.0°C | 1.2°C | 20.4°C | -5.1°C | 62 mm | 82% | 0.6 m/s | 2.1 |
| 1995 | 12.1°C | 7.8°C | 3.5°C | 23.6°C | -5.4°C | 68 mm | 81% | 0.7 m/s | 1.8 |
| 1994 | 13.3°C | 8.2°C | 3.1°C | 19.7°C | -1.5°C | 47 mm | 78% | 0.6 m/s | 2.5 |
| 1993 | 8.2°C | 3.9°C | -0.5°C | 14.6°C | -6.5°C | 83 mm | 81% | 0.7 m/s | 1.8 |
| 1992 | 10.0°C | 5.2°C | 0.5°C | 21.5°C | -6.0°C | 53 mm | 81% | 0.6 m/s | 2.1 |
| 1991 | 10.8°C | 6.2°C | 1.5°C | 17.5°C | -5.2°C | 110 mm | 82% | 0.6 m/s | 2.2 |
| 1990 | 10.6°C | 5.8°C | 1.0°C | 18.7°C | -5.5°C | 92 mm | 81% | 0.6 m/s | 2.1 |
| 1989 | 11.7°C | 6.8°C | 2.0°C | 21.1°C | -5.1°C | 54 mm | 80% | 0.6 m/s | 2.2 |
| 1988 | 8.6°C | 4.5°C | 0.3°C | 19.2°C | -7.3°C | 134 mm | 82% | 0.6 m/s | 2.3 |
| 1987 | 9.1°C | 4.4°C | -0.4°C | 16.3°C | -6.2°C | 78 mm | 81% | 0.6 m/s | 2.2 |
| 1986 | 10.7°C | 5.5°C | 0.2°C | 18.4°C | -5.5°C | 65 mm | 80% | 0.6 m/s | 2.3 |
| 1985 | 12.0°C | 6.7°C | 1.3°C | 15.4°C | -5.4°C | 68 mm | 80% | 0.6 m/s | 2.6 |
| 1984 | 12.9°C | 7.7°C | 2.4°C | 20.2°C | -6.4°C | 77 mm | 83% | 0.5 m/s | 2.6 |
| 1983 | 10.9°C | 5.9°C | 0.9°C | 21.9°C | -5.0°C | 119 mm | 83% | 0.6 m/s | — |
| 1982 | 12.2°C | 7.7°C | 3.2°C | 19.1°C | -5.1°C | 96 mm | 86% | 0.6 m/s | — |
| 1981 ❄️ | 8.2°C | 3.9°C | -0.4°C | 13.2°C | -5.0°C | 104 mm | 84% | 0.6 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 11.5°C with lows near 2°C (mean 6.8°C), based on 45 years of NASA POWER data.
October averages 82 mm of rainfall in Sudbury, a relatively wet time of year. The wettest on record was 164 mm in 2014.
The hottest October reached 28°C in 2023. The coldest dipped to -7.6°C in 2020.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 3°C. Daytime highs moved from 11.2°C to 14.4°C and overnight lows from 1.5°C to 4.4°C over the same span.
October is one of the warmer months of the year in Sudbury and a relatively wet time of year, so plan for around 11.5°C daytime highs and 2°C at night.
Not quite — October is the 7th coolest month in Sudbury, averaging 6.8°C.
For October in Sudbury, pack warm layers and a jacket for chilly mornings, with typical highs of 11.5°C and lows of 2°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 81% — quite humid.
Average wind speed in October is 0.6 m/s. The windiest October on record averaged 0.7 m/s (1993).
The wettest October on record was 2014 with 164 mm. On average, October sees 82 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 October, 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 October specifically, along with year-by-year records and how the month has changed over the decades.
