Weather on December 31 in Ottawa
Historical weather data for December 31 in Ottawa, Canada
Based on 55 years of data from OTTAWA CDA
About This Date
December 31st in Ottawa, Canada typically brings very cold winter weather, with average highs around -4°C and lows near -12°C. Over 55 years of records, the warmest December 31st was in 2024 (5°C average), while the coldest was 1998 (-22°C) — a 49°F range across recorded history. Precipitation has occurred on 55% of recorded December 31st dates, with snow falling 33% of the time (heaviest snowfall: 4.5"). The last decade has been 8.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 8.7°F warmer on this date compared to 20-30 years ago.
Planning for December 31st in Ottawa? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella. Check road conditions if traveling, as snow is possible.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | -8°C (17°F) | -15°C (5°F) | -- |
| 2024 | 7°C (45°F) | 2°C (36°F) | 0.15" |
| 2023 | -4°C (24°F) | -6°C (21°F) | 0" |
| 2022 | 7°C (44°F) | 2°C (36°F) | 2.44" |
| 2021 | -1°C (30°F) | -6°C (22°F) | 0" |
| 2020 | 3°C (38°F) | -4°C (24°F) | 0" |
| 2019 | 1°C (33°F) | -2°C (28°F) | 0.83" |
| 2018 | 1°C (34°F) | -9°C (16°F) | 0.68" |
| 2017 | -20°C (-4°F) | -24°C (-12°F) | 0" |
| 2016 | -8°C (18°F) | -18°C (-1°F) | 0.71" |
| 2015 | -1°C (30°F) | -7°C (20°F) | 0.21" |
| 2014 | -6°C (21°F) | -14°C (7°F) | 0" |
| 2013 | -16°C (4°F) | -22°C (-7°F) | 0.09" |
| 2012 | 0°C (32°F) | -13°C (9°F) | 0" |
| 2011 | -2°C (28°F) | -8°C (18°F) | 0.21" |
| 2010 | 7°C (44°F) | 1°C (33°F) | 0.08" |
| 2009 | -4°C (24°F) | -12°C (11°F) | 0.94" |
| 2008 | -14°C (7°F) | -18°C (0°F) | 0" |
| 2007 | -2°C (29°F) | -4°C (24°F) | 0" |
| 2006 | -2°C (29°F) | -13°C (9°F) | 0.17" |
| 2005 | -9°C (15°F) | -15°C (5°F) | 0" |
| 2004 | 8°C (46°F) | -7°C (19°F) | 0.1" |
| 2003 | 4°C (40°F) | -2°C (29°F) | 0" |
| 2002 | 2°C (35°F) | -8°C (18°F) | 0.75" |
| 2001 | -4°C (25°F) | -11°C (13°F) | 0" |
| 2000 | -4°C (24°F) | -7°C (19°F) | 0.24" |
| 1999 | -9°C (15°F) | -25°C (-13°F) | 0.06" |
| 1998 | -18°C (-1°F) | -26°C (-14°F) | 0.08" |
| 1997 | -17°C (2°F) | -19°C (-3°F) | 0" |
| 1996 | -16°C (3°F) | -18°C (0°F) | 0.02" |
| 1995 | 1°C (34°F) | -3°C (27°F) | 0.1" |
| 1994 | -6°C (22°F) | -16°C (4°F) | 0.46" |
| 1993 | -2°C (29°F) | -20°C (-4°F) | 0.64" |
| 1992 | -2°C (28°F) | -6°C (21°F) | 0.08" |
| 1991 | -6°C (21°F) | -19°C (-3°F) | 0" |
| 1990 | -14°C (7°F) | -19°C (-2°F) | 0" |
| 1989 | 3°C (38°F) | -18°C (-1°F) | 0.46" |
| 1988 | -4°C (25°F) | -7°C (19°F) | 0" |
| 1987 | 3°C (37°F) | -20°C (-4°F) | 0" |
| 1986 | -2°C (28°F) | -6°C (22°F) | 0" |
| 1985 | 3°C (37°F) | -10°C (14°F) | 0" |
| 1984 | -7°C (19°F) | -12°C (11°F) | 0.43" |
| 1983 | -4°C (24°F) | -14°C (7°F) | 0" |
| 1982 | -2°C (28°F) | -8°C (17°F) | 0.06" |
| 1981 | 1°C (34°F) | -14°C (6°F) | 0.62" |
| 1980 | -17°C (2°F) | -24°C (-12°F) | 0" |
| 1979 | -2°C (28°F) | -12°C (11°F) | 0" |
| 1978 | 7°C (44°F) | -8°C (17°F) | 1.98" |
| 1977 | -11°C (12°F) | -21°C (-5°F) | 0" |
| 1976 | -14°C (6°F) | -22°C (-8°F) | 0.36" |
| 1975 | 1°C (34°F) | -11°C (12°F) | 0" |
| 1974 | -2°C (29°F) | -13°C (9°F) | 0.03" |
| 1973 | -6°C (21°F) | -9°C (16°F) | 0.76" |
| 1972 | 3°C (38°F) | -11°C (13°F) | 1.65" |
| 1971 | -13°C (9°F) | -22°C (-7°F) | 0" |