January is one of the cooler months of the year in Mississauga, with average highs near -0.7°C and lows around -5.7°C (mean -3.2°C). It is one of the drier months, averaging 43 mm of rainfall and 85% relative humidity across the period.
January is one of the cooler months of the year in Mississauga. Across 45 years of records, the warmest January in Mississauga was 2006 — when the month averaged 1.1°C — while the coldest was 1994 at -8.7°C. Typical January days reach -0.7°C with nights near -5.7°C. The long-term trend is warming, about 0.7°C per decade.
January is one of the drier months in Mississauga, averaging 43 mm of rainfall. The wettest January on record was 2020 with 90 mm, while the driest was 1988 at 11 mm.
Relative humidity in Mississauga during January averages 85%. The most humid January was 1984 at 91%, and the least humid was 2021 at 81%.
January receives about 1.4 kWh/m²/day of solar energy in Mississauga. The sunniest Januarys were 2009, 2015 and 2025, among others at 1.6 kWh/m²/day, and the cloudiest was 2023 at 1.1.
Average wind speed in Mississauga during January is 5.5 m/s. The windiest January was 2025 at 6.8 m/s, while the calmest was 2001 at 4.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -4.6°C | -3.8°C | -2.8°C | -2.9°C | -1.4°C | +3.2°C |
| Avg High | -1.8°C | -1.0°C | -0.4°C | -0.5°C | 0.7°C | +2.5°C |
| Avg Low | -7.4°C | -6.6°C | -5.2°C | -5.3°C | -3.5°C | +3.9°C |
| Avg Rain | 29 mm | 36 mm | 50 mm | 52 mm | 51 mm | +23 mm |
January temperatures in Mississauga have risen by about 4°C between 1981–1985 and 2021–2025.
January has ranged from a record low of -21.1°C (1982) to a record high of 11.4°C (2005).
Rainfall in January is one of the drier months, averaging 43 mm, with a wettest year of 90 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.6°C per decade while lows rose 0.9°C per decade, narrowing the gap between day and night.
A quieter season to visit Mississauga
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Mississauga. That said, January — with days averaging -0.7°C and nights around -5.7°C (mean -3.2°C) and moderate rainfall (43 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 | -0.8°C | -2.9°C | -5.1°C | 3.9°C | -12.3°C | 21 mm | 81% | 6.8 m/s | 1.6 |
| 2024 | 1.1°C | -0.7°C | -2.4°C | 4.9°C | -9.8°C | 75 mm | 85% | 5.6 m/s | 1.2 |
| 2023 | 2.0°C | 0.3°C | -1.5°C | 5.2°C | -7.9°C | 54 mm | 84% | 4.5 m/s | 1.1 |
| 2022 | -1.5°C | -4.4°C | -7.4°C | 5.5°C | -13.8°C | 38 mm | 82% | 5.8 m/s | 1.5 |
| 2021 | 1.0°C | -0.7°C | -2.4°C | 4.6°C | -8.5°C | 31 mm | 81% | 4.8 m/s | 1.3 |
| 2020 🌧️ | 2.3°C | 0.0°C | -2.2°C | 9.8°C | -9.4°C | 90 mm | 84% | 5.2 m/s | 1.2 |
| 2019 | -0.9°C | -4.0°C | -7.0°C | 7.7°C | -16.7°C | 59 mm | 85% | 6.3 m/s | 1.5 |
| 2018 | -0.8°C | -3.4°C | -5.9°C | 8.8°C | -14.4°C | 62 mm | 87% | 6.3 m/s | 1.5 |
| 2017 | 1.6°C | -0.1°C | -1.9°C | 8.3°C | -8.2°C | 61 mm | 84% | 5.4 m/s | 1.3 |
| 2016 | 0.6°C | -1.8°C | -4.2°C | 7.6°C | -10.6°C | 45 mm | 83% | 5.7 m/s | 1.4 |
| 2015 | -2.4°C | -5.5°C | -8.5°C | 3.8°C | -16.2°C | 46 mm | 83% | 6.1 m/s | 1.6 |
| 2014 | -3.4°C | -6.4°C | -9.4°C | 4.9°C | -19.2°C | 41 mm | 88% | 6.4 m/s | 1.3 |
| 2013 | 1.5°C | -0.7°C | -2.9°C | 10.4°C | -11.1°C | 61 mm | 83% | 5.4 m/s | 1.5 |
| 2012 | 1.8°C | -0.4°C | -2.6°C | 7.7°C | -11.1°C | 65 mm | 83% | 5.7 m/s | 1.3 |
| 2011 | -2.0°C | -4.0°C | -6.1°C | 6.9°C | -14.9°C | 41 mm | 85% | 4.8 m/s | 1.4 |
| 2010 | -1.0°C | -2.9°C | -4.7°C | 4.4°C | -12.8°C | 43 mm | 87% | 5.6 m/s | 1.5 |
| 2009 | -2.8°C | -5.1°C | -7.5°C | 2.6°C | -13.9°C | 57 mm | 86% | 5.6 m/s | 1.6 |
| 2008 | 1.5°C | -0.6°C | -2.6°C | 10.4°C | -11.1°C | 52 mm | 84% | 6 m/s | 1.3 |
| 2007 | 1.4°C | -0.7°C | -2.8°C | 9.7°C | -12.5°C | 61 mm | 85% | 5.7 m/s | 1.4 |
| 2006 🔥 | 3.4°C | 1.1°C | -1.3°C | 7.9°C | -9.2°C | 75 mm | 86% | 5.5 m/s | 1.5 |
| 2005 | -1.1°C | -3.5°C | -5.9°C | 11.4°C | -15.5°C | 64 mm | 85% | 5.3 m/s | 1.6 |
| 2004 | -2.8°C | -5.1°C | -7.5°C | 8.4°C | -15.0°C | 53 mm | 90% | 6.6 m/s | 1.5 |
| 2003 | -3.7°C | -6.6°C | -9.4°C | 2.8°C | -19.1°C | 30 mm | 87% | 5.5 m/s | 1.5 |
| 2002 | 1.5°C | -1.0°C | -3.4°C | 5.8°C | -8.4°C | 45 mm | 87% | 5.4 m/s | 1.5 |
| 2001 | -1.3°C | -3.8°C | -6.4°C | 1.9°C | -14.4°C | 30 mm | 91% | 4.2 m/s | 1.3 |
| 2000 | -0.4°C | -3.0°C | -5.6°C | 10.2°C | -14.6°C | 29 mm | 84% | 6 m/s | 1.4 |
| 1999 | -2.2°C | -5.0°C | -7.9°C | 5.5°C | -18.2°C | 85 mm | 90% | 5.6 m/s | 1.5 |
| 1998 | 0.7°C | -1.7°C | -4.1°C | 8.2°C | -10.1°C | 54 mm | 87% | 5 m/s | 1.4 |
| 1997 | -0.8°C | -4.1°C | -7.5°C | 8.3°C | -17.5°C | 23 mm | 84% | 6.5 m/s | 1.4 |
| 1996 | -2.0°C | -5.1°C | -8.2°C | 8.5°C | -14.7°C | 35 mm | 83% | 5.4 m/s | 1.4 |
| 1995 | 0.5°C | -1.8°C | -4.1°C | 10.2°C | -12.9°C | 42 mm | 86% | 4.9 m/s | 1.4 |
| 1994 ❄️ | -5.7°C | -8.7°C | -11.8°C | 4.2°C | -20.1°C | 25 mm | 89% | 6 m/s | 1.3 |
| 1993 | -0.1°C | -2.7°C | -5.3°C | 7.0°C | -9.6°C | 35 mm | 84% | 5.2 m/s | 1.3 |
| 1992 | -0.3°C | -3.0°C | -5.6°C | 5.3°C | -13.6°C | 20 mm | 86% | 4.8 m/s | 1.4 |
| 1991 | -1.7°C | -4.4°C | -7.0°C | 3.4°C | -15.6°C | 17 mm | 85% | 5.6 m/s | 1.4 |
| 1990 | 1.6°C | -1.4°C | -4.3°C | 6.4°C | -11.9°C | 21 mm | 86% | 5.4 m/s | 1.3 |
| 1989 | 1.0°C | -2.2°C | -5.4°C | 5.8°C | -17.5°C | 15 mm | 83% | 5.7 m/s | 1.4 |
| 1988 | -0.9°C | -3.6°C | -6.3°C | 8.1°C | -15.3°C | 11 mm | 82% | 6 m/s | 1.3 |
| 1987 | -0.5°C | -2.9°C | -5.3°C | 4.0°C | -14.6°C | 17 mm | 83% | 4.7 m/s | 1.2 |
| 1986 | -1.2°C | -4.2°C | -7.2°C | 5.1°C | -15.4°C | 17 mm | 86% | 5.6 m/s | 1.3 |
| 1985 | -3.1°C | -5.6°C | -8.1°C | 6.8°C | -15.8°C | 53 mm | 88% | 5.7 m/s | 1.3 |
| 1984 | -3.7°C | -6.6°C | -9.5°C | 1.9°C | -17.4°C | 30 mm | 91% | 5.1 m/s | 1.4 |
| 1983 | -0.1°C | -2.5°C | -4.9°C | 5.1°C | -14.5°C | 34 mm | 85% | 4.8 m/s | — |
| 1982 | -4.5°C | -7.6°C | -10.7°C | 6.5°C | -21.1°C | 62 mm | 90% | 6.5 m/s | — |
| 1981 | -3.6°C | -6.2°C | -8.8°C | 5.6°C | -19.1°C | 16 mm | 89% | 4.9 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around -0.7°C with lows near -5.7°C (mean -3.2°C), based on 45 years of NASA POWER data.
January averages 43 mm of rainfall in Mississauga, one of the drier months. The wettest on record was 90 mm in 2020.
The hottest January reached 11.4°C in 2005. The coldest dipped to -21.1°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have risen by about 4°C. Daytime highs moved from -3°C to 0.4°C and overnight lows from -8.4°C to -3.8°C over the same span.
January is one of the cooler months of the year in Mississauga and one of the drier months, so plan for around -0.7°C daytime highs and -5.7°C at night.
Yes — January is the coldest month of the year in Mississauga, averaging -3.2°C.
For January in Mississauga, pack warm layers and a jacket for chilly mornings, with typical highs of -0.7°C and lows of -5.7°C.
Relative humidity in January averages 85% — quite humid.
Average wind speed in January is 5.5 m/s. The windiest January on record averaged 6.8 m/s (2025).
The wettest January on record was 2020 with 90 mm. On average, January sees 43 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 Mississauga 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.
