January is one of the cooler months of the year in Granby, with average highs near -6.8°C and lows around -16.8°C (mean -11.8°C). It is one of the drier months, averaging 68 mm of rainfall and 95% relative humidity across the period.
January is one of the cooler months of the year in Granby. Across 45 years of records, the warmest Januarys in Granby were 2006 and 2017 — when the month averaged -6.7°C — while the coldest were 1994 and 2004 at -19°C. Typical January days reach -6.8°C with nights near -16.8°C. The long-term trend is warming, about 1°C per decade.
January is one of the drier months in Granby, averaging 68 mm of rainfall. The wettest January on record was 1999 with 137 mm, while the driest was 2025 at 29 mm.
Relative humidity in Granby during January averages 95%. The most humid Januarys were 1981 and 2001 at 98%, and the least humid was 2025 at 89%.
January receives about 1.4 kWh/m²/day of solar energy in Granby. The sunniest January was 2004 at 1.8 kWh/m²/day, and the cloudiest were 1986 and 2023 at 1.1.
Average wind speed in Granby during January is 1.5 m/s. The windiest January was 1997 at 1.9 m/s, while the calmest was 2001 at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -13.9°C | -12.0°C | -11.9°C | -10.6°C | -9.8°C | +4.1°C |
| Avg High | -8.6°C | -6.7°C | -7.1°C | -5.8°C | -5.1°C | +3.5°C |
| Avg Low | -19.3°C | -17.2°C | -16.6°C | -15.5°C | -14.5°C | +4.8°C |
| Avg Rain | 51 mm | 100 mm | 73 mm | 57 mm | 55 mm | +4 mm |
January temperatures in Granby have risen by about 5.5°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -44.2°C (1981) to a record high of 12.3°C (1995).
Rainfall in January is one of the drier months, averaging 68 mm, with a wettest year of 137 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.8°C per decade while lows rose 1.2°C per decade, narrowing the gap between day and night.
A quieter season to visit Granby
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Granby. That said, January — with days averaging -6.8°C and nights around -16.8°C (mean -11.8°C) and moderate rainfall (68 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 | -6.4°C | -10.0°C | -13.7°C | 2.6°C | -24.5°C | 29 mm | 89% | 1.8 m/s | 1.4 |
| 2024 | -3.9°C | -8.0°C | -12.1°C | 3.5°C | -23.2°C | 68 mm | 92% | 1.4 m/s | 1.3 |
| 2023 | -2.9°C | -7.5°C | -12.2°C | 4.3°C | -23.2°C | 75 mm | 96% | 1.2 m/s | 1.1 |
| 2022 | -8.6°C | -15.3°C | -22.1°C | 2.2°C | -31.8°C | 30 mm | 93% | 1.5 m/s | 1.6 |
| 2021 | -5.1°C | -9.6°C | -14.0°C | 2.2°C | -25.1°C | 33 mm | 96% | 1.2 m/s | 1.4 |
| 2020 | -3.9°C | -8.5°C | -13.1°C | 6.7°C | -30.1°C | 96 mm | 97% | 1.3 m/s | 1.2 |
| 2019 | -8.2°C | -13.3°C | -18.4°C | 1.9°C | -30.7°C | 86 mm | 95% | 1.6 m/s | 1.3 |
| 2018 | -6.1°C | -11.6°C | -17.1°C | 11.7°C | -34.7°C | 78 mm | 94% | 1.7 m/s | 1.4 |
| 2017 | -2.7°C | -6.7°C | -10.7°C | 4.2°C | -30.2°C | 60 mm | 92% | 1.6 m/s | 1.4 |
| 2016 | -4.3°C | -9.0°C | -13.6°C | 3.1°C | -28.0°C | 33 mm | 94% | 1.6 m/s | 1.3 |
| 2015 | -7.6°C | -13.2°C | -18.9°C | 3.1°C | -28.8°C | 56 mm | 91% | 1.7 m/s | 1.7 |
| 2014 | -6.9°C | -11.5°C | -16.0°C | 4.6°C | -33.7°C | 56 mm | 91% | 1.8 m/s | 1.6 |
| 2013 | -5.1°C | -10.2°C | -15.3°C | 10.4°C | -31.2°C | 42 mm | 91% | 1.8 m/s | 1.5 |
| 2012 | -3.7°C | -9.4°C | -15.1°C | 2.9°C | -31.0°C | 64 mm | 94% | 1.6 m/s | 1.3 |
| 2011 | -7.6°C | -12.0°C | -16.3°C | 4.4°C | -38.3°C | 30 mm | 94% | 1.2 m/s | 1.4 |
| 2010 | -5.4°C | -9.4°C | -13.5°C | 6.4°C | -27.2°C | 62 mm | 97% | 1.5 m/s | 1.4 |
| 2009 | -9.4°C | -14.8°C | -20.1°C | -0.2°C | -32.3°C | 64 mm | 96% | 1.4 m/s | 1.5 |
| 2008 | -3.9°C | -8.0°C | -12.1°C | 10.6°C | -29.0°C | 71 mm | 93% | 1.6 m/s | 1.4 |
| 2007 | -5.8°C | -10.4°C | -15.0°C | 10.4°C | -33.2°C | 87 mm | 94% | 1.5 m/s | 1.5 |
| 2006 🔥 | -2.6°C | -6.7°C | -10.7°C | 6.1°C | -22.3°C | 129 mm | 97% | 1.6 m/s | 1.3 |
| 2005 | -7.2°C | -12.4°C | -17.7°C | 10.5°C | -29.5°C | 71 mm | 91% | 1.5 m/s | 1.6 |
| 2004 | -13.8°C | -19.0°C | -24.2°C | 0.7°C | -41.0°C | 48 mm | 98% | 1.6 m/s | 1.8 |
| 2003 | -10.7°C | -15.6°C | -20.6°C | 0.3°C | -33.9°C | 43 mm | 97% | 1.4 m/s | 1.7 |
| 2002 | -3.3°C | -7.7°C | -12.0°C | 1.2°C | -24.5°C | 72 mm | 98% | 1.3 m/s | 1.3 |
| 2001 | -6.9°C | -12.3°C | -17.6°C | -0.9°C | -25.8°C | 51 mm | 98% | 1.1 m/s | 1.5 |
| 2000 | -7.4°C | -11.8°C | -16.1°C | 7.1°C | -28.7°C | 89 mm | 91% | 1.8 m/s | 1.4 |
| 1999 🌧️ | -6.2°C | -11.6°C | -17.0°C | 4.1°C | -37.5°C | 137 mm | 94% | 1.7 m/s | 1.5 |
| 1998 | -5.2°C | -10.5°C | -15.7°C | 0.5°C | -33.4°C | 129 mm | 98% | 1.2 m/s | 1.5 |
| 1997 | -6.8°C | -12.2°C | -17.6°C | 3.6°C | -33.9°C | 106 mm | 94% | 1.9 m/s | 1.4 |
| 1996 | -8.5°C | -13.5°C | -18.4°C | 9.6°C | -35.2°C | 78 mm | 94% | 1.7 m/s | 1.3 |
| 1995 | -3.1°C | -7.7°C | -12.3°C | 12.3°C | -33.6°C | 114 mm | 96% | 1.5 m/s | 1.4 |
| 1994 ❄️ | -13.0°C | -19.0°C | -25.0°C | 0.6°C | -36.7°C | 93 mm | 97% | 1.6 m/s | 1.4 |
| 1993 | -6.3°C | -11.1°C | -16.0°C | 3.9°C | -30.7°C | 98 mm | 94% | 1.5 m/s | 1.3 |
| 1992 | -8.0°C | -13.4°C | -18.8°C | 0.9°C | -36.1°C | 78 mm | 98% | 1.4 m/s | 1.5 |
| 1991 | -7.7°C | -13.7°C | -19.7°C | 0.4°C | -34.8°C | 63 mm | 97% | 1.5 m/s | 1.5 |
| 1990 | -2.0°C | -6.9°C | -11.8°C | 2.9°C | -26.6°C | 102 mm | 96% | 1.7 m/s | 1.2 |
| 1989 | -4.8°C | -10.8°C | -16.7°C | 1.0°C | -36.2°C | 66 mm | 96% | 1.7 m/s | 1.4 |
| 1988 | -6.5°C | -11.4°C | -16.3°C | 3.3°C | -34.5°C | 40 mm | 96% | 1.7 m/s | 1.3 |
| 1987 | -7.6°C | -12.6°C | -17.7°C | 0.0°C | -28.8°C | 37 mm | 98% | 1.3 m/s | 1.2 |
| 1986 | -7.4°C | -12.8°C | -18.3°C | 3.2°C | -35.1°C | 76 mm | 97% | 1.7 m/s | 1.1 |
| 1985 | -11.2°C | -16.0°C | -20.9°C | 0.8°C | -30.7°C | 42 mm | 97% | 1.5 m/s | 1.5 |
| 1984 | -9.0°C | -14.3°C | -19.6°C | 0.3°C | -35.7°C | 36 mm | 98% | 1.3 m/s | 1.4 |
| 1983 | -5.8°C | -10.4°C | -15.0°C | 4.2°C | -27.9°C | 69 mm | 92% | 1.5 m/s | — |
| 1982 | -11.9°C | -18.6°C | -25.2°C | 0.4°C | -40.0°C | 60 mm | 98% | 1.6 m/s | — |
| 1981 | -13.4°C | -18.6°C | -23.7°C | 0.6°C | -44.2°C | 31 mm | 98% | 1.4 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around -6.8°C with lows near -16.8°C (mean -11.8°C), based on 45 years of NASA POWER data.
January averages 68 mm of rainfall in Granby, one of the drier months. The wettest on record was 137 mm in 1999.
The hottest January reached 12.3°C in 1995. The coldest dipped to -44.2°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 5.5°C. Daytime highs moved from -10.3°C to -5.4°C and overnight lows from -20.9°C to -14.8°C over the same span.
January is one of the cooler months of the year in Granby and one of the drier months, so plan for around -6.8°C daytime highs and -16.8°C at night.
Yes — January is the coldest month of the year in Granby, averaging -11.8°C.
For January in Granby, pack warm layers and a jacket for chilly mornings, with typical highs of -6.8°C and lows of -16.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 95% — quite humid.
Average wind speed in January is 1.5 m/s. The windiest January on record averaged 1.9 m/s (1997).
The wettest January on record was 1999 with 137 mm. On average, January sees 68 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 January, 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 January specifically, along with year-by-year records and how the month has changed over the decades.
