January is one of the cooler months of the year in Longueuil, with average highs near -6.9°C and lows around -17.5°C (mean -12.2°C). It is one of the drier months, averaging 68 mm of rainfall and 92% relative humidity across the period.
January is one of the cooler months of the year in Longueuil. Across 45 years of records, the warmest January in Longueuil was 1990 — when the month averaged -6.6°C — while the coldest were 1994 and 2004 at -19.1°C. Typical January days reach -6.9°C with nights near -17.5°C. The long-term trend is warming, about 0.9°C per decade.
January is one of the drier months in Longueuil, averaging 68 mm of rainfall. The wettest January on record was 2006 with 144 mm, while the driest was 1981 at 25 mm.
Relative humidity in Longueuil during January averages 92%. The most humid Januarys were 1985 and 1992 at 95%, and the least humid were 2000 and 2025 at 86%.
January receives about 1.4 kWh/m²/day of solar energy in Longueuil. 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 Longueuil during January is 3.3 m/s. The windiest January was 1997 at 4.1 m/s, while the calmest was 2001 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -14.1°C | -12.4°C | -12.0°C | -11.5°C | -10.5°C | +3.6°C |
| Avg High | -8.6°C | -7.0°C | -6.9°C | -6.2°C | -5.4°C | +3.2°C |
| Avg Low | -19.6°C | -17.8°C | -17.0°C | -16.9°C | -15.5°C | +4.1°C |
| Avg Rain | 48 mm | 85 mm | 71 mm | 70 mm | 63 mm | +15 mm |
January temperatures in Longueuil have risen by about 5.3°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -45.1°C (1981) to a record high of 9.5°C (1995).
Rainfall in January is one of the drier months, averaging 68 mm, with a wettest year of 144 mm.
A quieter season to visit Longueuil
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Longueuil. That said, January — with days averaging -6.9°C and nights around -17.5°C (mean -12.2°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 | -6.0°C | -10.0°C | -13.9°C | 1.7°C | -25.6°C | 35 mm | 86% | 3.9 m/s | 1.4 |
| 2024 | -4.2°C | -8.9°C | -13.5°C | 2.1°C | -24.2°C | 76 mm | 92% | 3.2 m/s | 1.3 |
| 2023 | -3.0°C | -7.6°C | -12.3°C | 4.1°C | -21.3°C | 81 mm | 93% | 2.9 m/s | 1.1 |
| 2022 | -9.2°C | -16.7°C | -24.1°C | 1.4°C | -35.8°C | 38 mm | 91% | 3 m/s | 1.6 |
| 2021 | -5.3°C | -10.1°C | -14.9°C | 1.1°C | -27.9°C | 49 mm | 94% | 2.6 m/s | 1.4 |
| 2020 | -4.6°C | -9.4°C | -14.2°C | 5.6°C | -28.6°C | 99 mm | 94% | 3 m/s | 1.2 |
| 2019 | -8.5°C | -14.0°C | -19.6°C | 1.4°C | -29.8°C | 103 mm | 91% | 3.5 m/s | 1.3 |
| 2018 | -6.7°C | -12.0°C | -17.3°C | 6.0°C | -33.6°C | 103 mm | 92% | 3.6 m/s | 1.4 |
| 2017 | -3.7°C | -7.9°C | -12.0°C | 2.2°C | -29.6°C | 68 mm | 93% | 3.5 m/s | 1.4 |
| 2016 | -4.5°C | -9.9°C | -15.2°C | 2.9°C | -30.4°C | 47 mm | 93% | 3.3 m/s | 1.3 |
| 2015 | -7.7°C | -14.1°C | -20.5°C | 2.1°C | -30.2°C | 56 mm | 90% | 3.5 m/s | 1.7 |
| 2014 | -7.5°C | -12.7°C | -17.8°C | 3.0°C | -33.6°C | 55 mm | 92% | 3.5 m/s | 1.6 |
| 2013 | -5.7°C | -11.4°C | -17.2°C | 4.9°C | -35.7°C | 53 mm | 91% | 3.4 m/s | 1.5 |
| 2012 | -4.6°C | -11.0°C | -17.5°C | 2.3°C | -33.8°C | 93 mm | 94% | 3.5 m/s | 1.3 |
| 2011 | -8.1°C | -12.9°C | -17.8°C | 3.3°C | -38.8°C | 39 mm | 92% | 2.7 m/s | 1.4 |
| 2010 | -5.1°C | -9.6°C | -14.1°C | 3.3°C | -26.1°C | 80 mm | 94% | 3.4 m/s | 1.4 |
| 2009 | -9.7°C | -15.0°C | -20.2°C | 0.3°C | -33.6°C | 65 mm | 93% | 3.2 m/s | 1.5 |
| 2008 | -4.0°C | -8.6°C | -13.2°C | 5.1°C | -31.7°C | 90 mm | 92% | 3.4 m/s | 1.4 |
| 2007 | -5.4°C | -10.3°C | -15.1°C | 7.8°C | -33.1°C | 114 mm | 91% | 3.2 m/s | 1.5 |
| 2006 🌧️ | -3.2°C | -7.6°C | -11.9°C | 3.0°C | -24.4°C | 144 mm | 94% | 3.2 m/s | 1.3 |
| 2005 | -7.3°C | -13.1°C | -18.9°C | 6.0°C | -30.9°C | 63 mm | 88% | 3.3 m/s | 1.6 |
| 2004 | -13.9°C | -19.1°C | -24.2°C | 1.5°C | -41.4°C | 58 mm | 93% | 3.9 m/s | 1.8 |
| 2003 | -9.6°C | -15.1°C | -20.7°C | 0.2°C | -33.6°C | 29 mm | 90% | 3.1 m/s | 1.7 |
| 2002 | -2.9°C | -7.6°C | -12.3°C | 2.0°C | -22.8°C | 43 mm | 93% | 3.1 m/s | 1.3 |
| 2001 | -6.6°C | -12.4°C | -18.2°C | -0.2°C | -27.0°C | 47 mm | 94% | 2.4 m/s | 1.5 |
| 2000 | -6.4°C | -11.1°C | -15.8°C | 7.5°C | -27.1°C | 57 mm | 86% | 3.9 m/s | 1.4 |
| 1999 | -7.3°C | -12.9°C | -18.5°C | 2.4°C | -34.5°C | 131 mm | 92% | 3.8 m/s | 1.5 |
| 1998 | -6.1°C | -10.9°C | -15.7°C | 2.8°C | -34.9°C | 100 mm | 94% | 3.4 m/s | 1.5 |
| 1997 | -6.5°C | -12.6°C | -18.6°C | 3.2°C | -35.5°C | 83 mm | 90% | 4.1 m/s | 1.4 |
| 1996 | -8.5°C | -13.8°C | -19.2°C | 4.6°C | -34.7°C | 67 mm | 92% | 3.2 m/s | 1.3 |
| 1995 | -3.4°C | -7.8°C | -12.2°C | 9.5°C | -32.7°C | 98 mm | 93% | 3.3 m/s | 1.4 |
| 1994 ❄️ | -12.8°C | -19.1°C | -25.4°C | 1.8°C | -39.4°C | 78 mm | 93% | 3.7 m/s | 1.4 |
| 1993 | -7.0°C | -11.8°C | -16.6°C | 3.8°C | -28.5°C | 83 mm | 92% | 3.2 m/s | 1.3 |
| 1992 | -9.5°C | -14.7°C | -19.9°C | 1.3°C | -37.3°C | 80 mm | 95% | 3.1 m/s | 1.5 |
| 1991 | -7.5°C | -13.8°C | -20.2°C | 1.1°C | -36.2°C | 56 mm | 93% | 3.2 m/s | 1.5 |
| 1990 🔥 | -1.5°C | -6.6°C | -11.7°C | 3.2°C | -27.9°C | 74 mm | 93% | 3.7 m/s | 1.2 |
| 1989 | -4.4°C | -10.8°C | -17.1°C | 2.8°C | -38.4°C | 59 mm | 93% | 3.5 m/s | 1.4 |
| 1988 | -5.4°C | -10.7°C | -15.9°C | 6.8°C | -35.0°C | 28 mm | 91% | 3.5 m/s | 1.3 |
| 1987 | -7.7°C | -13.0°C | -18.3°C | -0.1°C | -31.1°C | 45 mm | 95% | 2.8 m/s | 1.2 |
| 1986 | -6.9°C | -12.6°C | -18.2°C | 2.5°C | -36.2°C | 85 mm | 93% | 3.6 m/s | 1.1 |
| 1985 | -11.1°C | -16.2°C | -21.2°C | 1.7°C | -30.3°C | 45 mm | 95% | 3.6 m/s | 1.5 |
| 1984 | -9.7°C | -15.0°C | -20.3°C | 1.0°C | -35.1°C | 31 mm | 94% | 2.7 m/s | 1.4 |
| 1983 | -6.3°C | -10.9°C | -15.5°C | 3.1°C | -28.8°C | 55 mm | 92% | 3.2 m/s | — |
| 1982 | -12.3°C | -18.9°C | -25.6°C | 1.2°C | -41.5°C | 60 mm | 93% | 3.6 m/s | — |
| 1981 | -13.3°C | -18.8°C | -24.2°C | 1.5°C | -45.1°C | 25 mm | 95% | 3.1 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around -6.9°C with lows near -17.5°C (mean -12.2°C), based on 45 years of NASA POWER data.
January averages 68 mm of rainfall in Longueuil, one of the drier months. The wettest on record was 144 mm in 2006.
The hottest January reached 9.5°C in 1995. The coldest dipped to -45.1°C in 1981.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 5.3°C. Daytime highs moved from -10.5°C to -5.5°C and overnight lows from -21.4°C to -15.7°C over the same span.
January is one of the cooler months of the year in Longueuil and one of the drier months, so plan for around -6.9°C daytime highs and -17.5°C at night.
Yes — January is the coldest month of the year in Longueuil, averaging -12.2°C.
For January in Longueuil, pack warm layers and a jacket for chilly mornings, with typical highs of -6.9°C and lows of -17.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 92% — quite humid.
Average wind speed in January is 3.3 m/s. The windiest January on record averaged 4.1 m/s (1997).
The wettest January on record was 2006 with 144 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 Longueuil 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.
