October is one of the warmer months of the year in Belleville, with average highs near 20.8°C and lows around 8°C (mean 14.4°C). It is about average for rainfall, averaging 86 mm of rainfall and 70% relative humidity across the period.
October is one of the warmer months of the year in Belleville. Across 45 years of records, the warmest October in Belleville was 2025 — when the month averaged 17.4°C — while the coldest was 1988 at 11°C. Typical October days reach 20.8°C with nights near 8°C. The long-term trend is warming, about 0.4°C per decade.
October is about average for rainfall in Belleville, averaging 86 mm of rainfall. The wettest October on record was 2009 with 289 mm, while the driest was 2024 at 19 mm.
Relative humidity in Belleville during October averages 70%. The most humid October was 1984 at 83%, and the least humid was 2024 at 59%.
October receives about 3.5 kWh/m²/day of solar energy in Belleville. The sunniest Octobers were 2010 and 2024 at 4.3 kWh/m²/day, and the cloudiest was 1984 at 2.5.
Average wind speed in Belleville during October is 2.2 m/s. The windiest Octobers were 1991, 2001 and 2012 at 2.5 m/s, while the calmest was 2000 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.8°C | 14.3°C | 14.2°C | 14.7°C | 15.5°C | +1.7°C |
| Avg High | 19.9°C | 21.1°C | 20.5°C | 20.9°C | 22.2°C | +2.3°C |
| Avg Low | 7.6°C | 7.5°C | 8.0°C | 8.4°C | 8.8°C | +1.2°C |
| Avg Rain | 97 mm | 73 mm | 106 mm | 73 mm | 83 mm | -14 mm |
October temperatures in Belleville have risen by about 1.3°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -5.4°C (1981) to a record high of 34.1°C (2006).
Rainfall in October is about average for rainfall, averaging 86 mm, with a wettest year of 289 mm.
A good time to visit Belleville
October is a good time to visit Belleville, with days averaging 20.8°C and nights around 8°C (mean 14.4°C, warmer than Belleville's yearly average) and higher rainfall. September and June 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 🔥 | 23.7°C | 17.4°C | 11.1°C | 33.0°C | 2.3°C | 97 mm | 65% | 1.9 m/s | 3.6 |
| 2024 | 23.9°C | 16.0°C | 8.1°C | 30.8°C | 0.5°C | 19 mm | 59% | 2 m/s | 4.3 |
| 2023 | 22.3°C | 15.6°C | 9.0°C | 32.4°C | -4.3°C | 52 mm | 64% | 2.3 m/s | 3.5 |
| 2022 | 21.4°C | 13.9°C | 6.4°C | 27.8°C | -3.1°C | 70 mm | 59% | 2.3 m/s | 4 |
| 2021 | 22.6°C | 17.0°C | 11.5°C | 30.6°C | 3.9°C | 112 mm | 77% | 2.3 m/s | 3 |
| 2020 | 19.3°C | 13.0°C | 6.6°C | 30.7°C | 0.3°C | 145 mm | 71% | 2.2 m/s | 3.1 |
| 2019 | 19.3°C | 13.3°C | 7.4°C | 33.7°C | -3.4°C | 131 mm | 73% | 2.3 m/s | 3.2 |
| 2018 | 20.2°C | 14.4°C | 8.5°C | 31.3°C | -1.7°C | 61 mm | 75% | 2.1 m/s | 3.4 |
| 2017 | 22.6°C | 16.2°C | 9.8°C | 31.0°C | -3.9°C | 89 mm | 66% | 2.3 m/s | 3.1 |
| 2016 | 22.7°C | 16.7°C | 10.7°C | 29.2°C | 3.2°C | 61 mm | 79% | 2.1 m/s | 3.5 |
| 2015 | 20.9°C | 14.8°C | 8.6°C | 28.3°C | 1.4°C | 21 mm | 69% | 2.2 m/s | 3.6 |
| 2014 | 19.8°C | 14.2°C | 8.6°C | 31.4°C | -0.3°C | 130 mm | 78% | 2.3 m/s | 3.3 |
| 2013 | 20.8°C | 14.4°C | 7.9°C | 31.2°C | -3.4°C | 88 mm | 72% | 2 m/s | 3.4 |
| 2012 | 18.8°C | 12.6°C | 6.3°C | 27.8°C | -0.8°C | 86 mm | 72% | 2.5 m/s | 3.5 |
| 2011 | 21.1°C | 14.5°C | 7.9°C | 28.5°C | 0.2°C | 46 mm | 64% | 2.1 m/s | 3.9 |
| 2010 | 22.7°C | 15.5°C | 8.3°C | 30.3°C | -1.3°C | 20 mm | 62% | 2.1 m/s | 4.3 |
| 2009 🌧️ | 16.6°C | 11.4°C | 6.2°C | 23.2°C | 0.3°C | 289 mm | 81% | 2.3 m/s | 2.7 |
| 2008 | 19.8°C | 13.6°C | 7.5°C | 27.1°C | -2.8°C | 52 mm | 76% | 2 m/s | 3.8 |
| 2007 | 23.6°C | 17.2°C | 10.7°C | 33.5°C | 0.7°C | 78 mm | 68% | 2.4 m/s | 3.5 |
| 2006 | 18.7°C | 12.3°C | 5.9°C | 34.1°C | -3.3°C | 114 mm | 70% | 2.3 m/s | 3.4 |
| 2005 | 20.7°C | 14.6°C | 8.5°C | 30.2°C | 0.8°C | 60 mm | 72% | 1.9 m/s | 3.6 |
| 2004 | 21.2°C | 15.4°C | 9.5°C | 27.8°C | 2.1°C | 125 mm | 73% | 2.2 m/s | 2.9 |
| 2003 | 21.6°C | 14.7°C | 7.9°C | 29.3°C | 0.2°C | 55 mm | 70% | 2.1 m/s | 3.8 |
| 2002 | 19.0°C | 12.9°C | 6.9°C | 32.9°C | 0.4°C | 103 mm | 71% | 2 m/s | 3.2 |
| 2001 | 20.4°C | 13.8°C | 7.2°C | 29.7°C | -2.3°C | 127 mm | 69% | 2.5 m/s | 3.5 |
| 2000 | 23.0°C | 16.2°C | 9.4°C | 32.7°C | -2.1°C | 55 mm | 68% | 1.8 m/s | 3.5 |
| 1999 | 22.5°C | 14.9°C | 7.3°C | 29.3°C | -1.9°C | 46 mm | 60% | 2.1 m/s | 3.9 |
| 1998 | 22.1°C | 15.5°C | 8.9°C | 27.4°C | 0.8°C | 75 mm | 72% | 2 m/s | 3.7 |
| 1997 | 21.7°C | 14.8°C | 7.9°C | 33.3°C | -2.3°C | 62 mm | 65% | 2.2 m/s | 3.6 |
| 1996 | 21.2°C | 14.3°C | 7.5°C | 29.0°C | -0.8°C | 63 mm | 72% | 2.2 m/s | 3.5 |
| 1995 | 22.4°C | 15.1°C | 7.9°C | 29.7°C | 1.4°C | 63 mm | 62% | 2.4 m/s | 3.8 |
| 1994 | 21.4°C | 14.8°C | 8.2°C | 30.8°C | -1.0°C | 65 mm | 72% | 1.9 m/s | 3.3 |
| 1993 | 17.2°C | 11.3°C | 5.4°C | 26.0°C | -3.6°C | 57 mm | 81% | 1.9 m/s | 3.1 |
| 1992 | 21.2°C | 14.1°C | 7.0°C | 30.6°C | -3.7°C | 37 mm | 66% | 1.9 m/s | 3.5 |
| 1991 | 21.2°C | 14.9°C | 8.6°C | 29.1°C | 0.0°C | 144 mm | 70% | 2.5 m/s | 3.6 |
| 1990 | 20.3°C | 13.1°C | 5.9°C | 30.4°C | -0.2°C | 114 mm | 69% | 2.3 m/s | 3.6 |
| 1989 | 21.7°C | 14.8°C | 7.9°C | 30.8°C | -0.6°C | 57 mm | 67% | 2.2 m/s | 3.6 |
| 1988 ❄️ | 17.5°C | 11.0°C | 4.4°C | 27.3°C | -2.6°C | 61 mm | 61% | 2.2 m/s | 3.7 |
| 1987 | 18.1°C | 11.3°C | 4.5°C | 26.0°C | -1.1°C | 53 mm | 62% | 2.2 m/s | 3.5 |
| 1986 | 19.2°C | 13.7°C | 8.2°C | 26.3°C | -0.1°C | 127 mm | 82% | 1.9 m/s | 3.1 |
| 1985 | 21.9°C | 16.0°C | 10.1°C | 28.5°C | 2.2°C | 77 mm | 72% | 2.2 m/s | 3 |
| 1984 | 21.0°C | 15.7°C | 10.3°C | 26.0°C | 2.3°C | 141 mm | 83% | 2 m/s | 2.5 |
| 1983 | 21.2°C | 15.3°C | 9.3°C | 31.5°C | 1.1°C | 170 mm | 72% | 2.1 m/s | — |
| 1982 | 20.4°C | 13.9°C | 7.4°C | 29.4°C | -3.2°C | 83 mm | 74% | 2 m/s | — |
| 1981 | 18.4°C | 12.4°C | 6.4°C | 30.8°C | -5.4°C | 101 mm | 72% | 2.2 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 20.8°C with lows near 8°C (mean 14.4°C), based on 45 years of NASA POWER data.
October averages 86 mm of rainfall in Belleville, about average for rainfall. The wettest on record was 289 mm in 2009.
The hottest October reached 34.1°C in 2006. The coldest dipped to -5.4°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.3°C. Daytime highs moved from 20.6°C to 22.8°C and overnight lows from 8.7°C to 9.2°C over the same span.
October is one of the warmer months of the year in Belleville and about average for rainfall, so plan for around 20.8°C daytime highs and 8°C at night.
Not quite — October is the 7th coolest month in Belleville, averaging 14.4°C.
For October in Belleville, pack light layers you can adjust through the day, with typical highs of 20.8°C and lows of 8°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 70% — moderately humid.
Average wind speed in October is 2.2 m/s. The windiest October on record averaged 2.5 m/s (1991).
The wettest October on record was 2009 with 289 mm. On average, October sees 86 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 Belleville 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.
