Weather on July 31 in Ottawa
Historical weather data for July 31 in Ottawa, Canada
Based on 55 years of data from OTTAWA CDA
About This Date
July 31st in Ottawa, Canada typically brings warm summer weather, with average highs around 27°C and lows near 15°C. Over 55 years of records, the warmest July 31st was in 1975 (26°C average), while the coldest was 1992 (15°C) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 42% of July 31st dates historically, with the wettest July 31st recording 2.78" of rain. The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.4°F cooler on this date compared to 20-30 years ago.
Planning for July 31st in Ottawa? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 23°C (74°F) | 16°C (60°F) | -- |
| 2024 | 30°C (86°F) | 15°C (59°F) | 0 mm |
| 2023 | 21°C (70°F) | 11°C (51°F) | 0 mm |
| 2022 | 28°C (83°F) | 12°C (54°F) | 0 mm |
| 2021 | 23°C (73°F) | 12°C (54°F) | 0 mm |
| 2020 | 29°C (84°F) | 16°C (60°F) | 0 mm |
| 2019 | 28°C (82°F) | 16°C (60°F) | 0 mm |
| 2018 | 28°C (83°F) | 18°C (64°F) | 0 mm |
| 2017 | 27°C (81°F) | 15°C (59°F) | 0 mm |
| 2016 | 29°C (84°F) | 14°C (57°F) | 0 mm |
| 2015 | 28°C (82°F) | 16°C (61°F) | 2 mm |
| 2014 | 23°C (73°F) | 12°C (53°F) | 9 mm |
| 2013 | 26°C (79°F) | 12°C (54°F) | 0 mm |
| 2012 | 33°C (92°F) | 14°C (58°F) | 10 mm |
| 2011 | 29°C (85°F) | 13°C (55°F) | 0 mm |
| 2010 | 24°C (75°F) | 7°C (44°F) | 0 mm |
| 2009 | 26°C (79°F) | 17°C (62°F) | 0 mm |
| 2008 | 27°C (80°F) | 16°C (61°F) | 1 mm |
| 2007 | 29°C (85°F) | 17°C (63°F) | 0 mm |
| 2006 | 31°C (87°F) | 17°C (63°F) | 52 mm |
| 2005 | 25°C (77°F) | 11°C (51°F) | 0 mm |
| 2004 | 24°C (76°F) | 19°C (67°F) | 22 mm |
| 2003 | 29°C (84°F) | 13°C (56°F) | 0 mm |
| 2002 | 31°C (88°F) | 21°C (69°F) | 0 mm |
| 2001 | 31°C (87°F) | 14°C (58°F) | 0 mm |
| 2000 | 26°C (78°F) | 19°C (66°F) | 0 mm |
| 1999 | 29°C (85°F) | 21°C (69°F) | 3 mm |
| 1998 | 24°C (75°F) | 12°C (54°F) | 0 mm |
| 1997 | 32°C (89°F) | 16°C (60°F) | 0 mm |
| 1996 | 24°C (75°F) | 17°C (62°F) | 71 mm |
| 1995 | 31°C (88°F) | 14°C (58°F) | 0 mm |
| 1994 | 27°C (81°F) | 14°C (57°F) | 1 mm |
| 1993 | 28°C (83°F) | 17°C (62°F) | 0 mm |
| 1992 | 18°C (65°F) | 12°C (53°F) | 69 mm |
| 1991 | 28°C (82°F) | 16°C (61°F) | 2 mm |
| 1990 | 23°C (73°F) | 13°C (56°F) | 0 mm |
| 1989 | 28°C (82°F) | 14°C (57°F) | 0 mm |
| 1988 | 28°C (82°F) | 20°C (68°F) | 0 mm |
| 1987 | 24°C (75°F) | 9°C (49°F) | 0 mm |
| 1986 | 18°C (65°F) | 15°C (59°F) | 1 mm |
| 1985 | 21°C (69°F) | 13°C (55°F) | 0 mm |
| 1984 | 29°C (85°F) | 15°C (59°F) | 3 mm |
| 1983 | 23°C (73°F) | 16°C (60°F) | 44 mm |
| 1982 | 22°C (72°F) | 17°C (63°F) | 4 mm |
| 1981 | 28°C (83°F) | 12°C (54°F) | 0 mm |
| 1980 | 29°C (84°F) | 15°C (59°F) | 0 mm |
| 1979 | 28°C (83°F) | 21°C (69°F) | 16 mm |
| 1978 | 24°C (76°F) | 8°C (47°F) | 4 mm |
| 1977 | 27°C (81°F) | 9°C (49°F) | 10 mm |
| 1976 | 21°C (70°F) | 16°C (60°F) | 3 mm |
| 1975 | 33°C (92°F) | 19°C (67°F) | 0 mm |
| 1974 | 23°C (74°F) | 13°C (55°F) | 19 mm |
| 1973 | 29°C (84°F) | 18°C (64°F) | 28 mm |
| 1972 | 27°C (81°F) | 13°C (56°F) | 5 mm |
| 1971 | 21°C (69°F) | 14°C (58°F) | 27 mm |