October is one of the warmer months of the year in Granby, with average highs near 12.4°C and lows around 3.1°C (mean 7.8°C). It is a relatively wet time of year, averaging 106 mm of rainfall and 84% relative humidity across the period.
October is one of the warmer months of the year in Granby. Across 45 years of records, the warmest October in Granby was 2017 — when the month averaged 12.2°C — while the coldest was 1981 at 4.9°C. Typical October days reach 12.4°C with nights near 3.1°C. The long-term trend is warming, about 0.7°C per decade.
October is a relatively wet time of year in Granby, averaging 106 mm of rainfall. The wettest October on record was 2025 with 336 mm, while the driest was 1994 at 26 mm.
Relative humidity in Granby during October averages 84%. The most humid October was 2005 at 89%, and the least humid was 2022 at 77%.
October receives about 2.4 kWh/m²/day of solar energy in Granby. The sunniest Octobers were 1984, 1997 and 2024 at 2.9 kWh/m²/day, and the cloudiest were 1988, 2006 and 2018 at 2.
Average wind speed in Granby during October is 0.3 m/s. The windiest Octobers were 2013, 2015 and 2017, among others at 0.4 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.6°C | 7.1°C | 7.5°C | 8.6°C | 9.7°C | +3.1°C |
| Avg High | 11.4°C | 11.9°C | 11.9°C | 13.1°C | 14.6°C | +3.2°C |
| Avg Low | 1.7°C | 2.4°C | 3.1°C | 4.0°C | 4.8°C | +3.1°C |
| Avg Rain | 84 mm | 104 mm | 123 mm | 105 mm | 119 mm | +36 mm |
October temperatures in Granby have risen by about 3.3°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -6.1°C (2015) to a record high of 26.5°C (2018).
Rainfall in October is a relatively wet time of year, averaging 106 mm, with a wettest year of 336 mm.
A good time to visit Granby
October is a good time to visit Granby, with days averaging 12.4°C and nights around 3.1°C (mean 7.8°C, warmer than Granby'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 🌧️ | 14.1°C | 9.2°C | 4.2°C | 25.6°C | -1.4°C | 336 mm | 86% | 0.3 m/s | 2.8 |
| 2024 | 14.5°C | 9.4°C | 4.3°C | 22.7°C | -5.9°C | 38 mm | 80% | 0.3 m/s | 2.9 |
| 2023 | 15.3°C | 11.1°C | 6.8°C | 26.2°C | -4.4°C | 93 mm | 86% | 0.3 m/s | 2.1 |
| 2022 | 15.4°C | 9.4°C | 3.4°C | 22.5°C | -3.1°C | 64 mm | 77% | 0.3 m/s | 2.8 |
| 2021 | 16.4°C | 11.7°C | 6.9°C | 24.8°C | -1.6°C | 86 mm | 82% | 0.3 m/s | 2.2 |
| 2020 | 11.8°C | 7.4°C | 2.9°C | 21.7°C | -5.5°C | 100 mm | 83% | 0.3 m/s | 2.3 |
| 2019 | 13.6°C | 9.0°C | 4.5°C | 19.0°C | -0.6°C | 183 mm | 85% | 0.3 m/s | 2.4 |
| 2018 | 10.3°C | 6.1°C | 1.9°C | 26.5°C | -5.4°C | 81 mm | 82% | 0.3 m/s | 2 |
| 2017 🔥 | 17.1°C | 12.2°C | 7.3°C | 23.3°C | -1.7°C | 101 mm | 82% | 0.4 m/s | 2.6 |
| 2016 | 13.2°C | 8.7°C | 4.3°C | 23.4°C | -4.0°C | 117 mm | 82% | 0.3 m/s | 2.3 |
| 2015 | 11.3°C | 6.0°C | 0.8°C | 21.3°C | -6.1°C | 64 mm | 79% | 0.4 m/s | 2.6 |
| 2014 | 13.7°C | 9.6°C | 5.6°C | 23.2°C | -1.2°C | 98 mm | 85% | 0.3 m/s | 2.2 |
| 2013 | 13.8°C | 8.9°C | 3.9°C | 22.6°C | -5.2°C | 63 mm | 82% | 0.4 m/s | 2.5 |
| 2012 | 14.2°C | 9.7°C | 5.1°C | 20.9°C | -3.0°C | 87 mm | 86% | 0.3 m/s | 2.1 |
| 2011 | 13.0°C | 8.8°C | 4.5°C | 22.2°C | -3.4°C | 109 mm | 86% | 0.3 m/s | 2.4 |
| 2010 | 10.9°C | 6.6°C | 2.3°C | 19.0°C | -4.2°C | 145 mm | 85% | 0.3 m/s | 2.3 |
| 2009 | 10.0°C | 5.6°C | 1.3°C | 18.4°C | -4.2°C | 109 mm | 86% | 0.3 m/s | 2.2 |
| 2008 | 11.3°C | 6.8°C | 2.3°C | 19.4°C | -5.2°C | 101 mm | 84% | 0.4 m/s | 2.5 |
| 2007 | 14.9°C | 10.2°C | 5.6°C | 22.1°C | -4.4°C | 133 mm | 85% | 0.3 m/s | 2.6 |
| 2006 | 11.0°C | 6.8°C | 2.6°C | 19.2°C | -3.5°C | 188 mm | 87% | 0.4 m/s | 2 |
| 2005 | 12.6°C | 8.7°C | 4.8°C | 24.3°C | -3.7°C | 211 mm | 89% | 0.3 m/s | 2.2 |
| 2004 | 13.0°C | 8.1°C | 3.2°C | 22.3°C | -3.3°C | 60 mm | 85% | 0.3 m/s | 2.6 |
| 2003 | 11.0°C | 6.7°C | 2.4°C | 24.0°C | -4.1°C | 185 mm | 86% | 0.4 m/s | 2.3 |
| 2002 | 10.0°C | 5.7°C | 1.3°C | 24.7°C | -5.0°C | 97 mm | 83% | 0.3 m/s | 2.5 |
| 2001 | 13.4°C | 8.9°C | 4.4°C | 22.1°C | -4.1°C | 85 mm | 82% | 0.4 m/s | 2.4 |
| 2000 | 11.8°C | 7.3°C | 2.9°C | 20.0°C | -4.4°C | 60 mm | 86% | 0.3 m/s | 2.3 |
| 1999 | 11.1°C | 6.0°C | 0.9°C | 18.9°C | -5.7°C | 121 mm | 81% | 0.4 m/s | 2.5 |
| 1998 | 12.7°C | 8.2°C | 3.7°C | 21.5°C | -2.7°C | 81 mm | 82% | 0.4 m/s | 2.5 |
| 1997 | 11.4°C | 6.5°C | 1.7°C | 21.9°C | -5.5°C | 36 mm | 80% | 0.3 m/s | 2.9 |
| 1996 | 11.9°C | 6.9°C | 1.9°C | 19.0°C | -3.9°C | 89 mm | 80% | 0.4 m/s | 2.4 |
| 1995 | 13.9°C | 9.6°C | 5.4°C | 23.2°C | -4.8°C | 167 mm | 83% | 0.4 m/s | 2.4 |
| 1994 | 13.0°C | 8.0°C | 3.0°C | 21.3°C | -3.7°C | 26 mm | 83% | 0.3 m/s | 2.7 |
| 1993 | 9.8°C | 5.2°C | 0.5°C | 18.7°C | -5.8°C | 140 mm | 83% | 0.4 m/s | 2.3 |
| 1992 | 9.6°C | 5.0°C | 0.4°C | 18.5°C | -4.8°C | 89 mm | 84% | 0.3 m/s | 2.2 |
| 1991 | 13.3°C | 8.1°C | 3.0°C | 21.8°C | -4.7°C | 121 mm | 86% | 0.3 m/s | 2.3 |
| 1990 | 11.9°C | 7.7°C | 3.4°C | 22.4°C | -5.8°C | 170 mm | 87% | 0.3 m/s | 2.3 |
| 1989 | 12.6°C | 7.7°C | 2.8°C | 20.8°C | -4.1°C | 97 mm | 85% | 0.3 m/s | 2.5 |
| 1988 | 9.6°C | 5.3°C | 1.0°C | 23.5°C | -5.8°C | 87 mm | 84% | 0.3 m/s | 2 |
| 1987 | 10.8°C | 5.8°C | 0.7°C | 18.6°C | -4.9°C | 98 mm | 82% | 0.4 m/s | 2.5 |
| 1986 | 10.8°C | 5.9°C | 1.0°C | 17.5°C | -5.8°C | 87 mm | 84% | 0.3 m/s | 2.4 |
| 1985 | 11.9°C | 7.1°C | 2.3°C | 19.8°C | -4.5°C | 106 mm | 81% | 0.4 m/s | 2.4 |
| 1984 | 13.1°C | 8.0°C | 2.8°C | 20.7°C | -5.0°C | 50 mm | 83% | 0.3 m/s | 2.9 |
| 1983 | 11.9°C | 7.1°C | 2.3°C | 23.3°C | -5.1°C | 86 mm | 82% | 0.3 m/s | — |
| 1982 | 12.5°C | 7.6°C | 2.6°C | 18.5°C | -3.6°C | 41 mm | 83% | 0.3 m/s | — |
| 1981 ❄️ | 9.6°C | 4.9°C | 0.2°C | 16.0°C | -5.5°C | 101 mm | 85% | 0.3 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 12.4°C with lows near 3.1°C (mean 7.8°C), based on 45 years of NASA POWER data.
October averages 106 mm of rainfall in Granby, a relatively wet time of year. The wettest on record was 336 mm in 2025.
The hottest October reached 26.5°C in 2018. The coldest dipped to -6.1°C in 2015.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 3.3°C. Daytime highs moved from 11.8°C to 15.1°C and overnight lows from 2°C to 5.1°C over the same span.
October is one of the warmer months of the year in Granby and a relatively wet time of year, so plan for around 12.4°C daytime highs and 3.1°C at night.
Not quite — October is the 7th coolest month in Granby, averaging 7.8°C.
For October in Granby, pack warm layers and a jacket for chilly mornings, with typical highs of 12.4°C and lows of 3.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 84% — quite humid.
Average wind speed in October is 0.3 m/s. The windiest October on record averaged 0.4 m/s (1985).
The wettest October on record was 2025 with 336 mm. On average, October sees 106 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 Granby 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.
