Weather on August 17 in Ottawa
Historical weather data for August 17 in Ottawa, Canada
Based on 55 years of data from OTTAWA CDA
About This Date
August 17th in Ottawa, Canada typically brings pleasant summer weather, with average highs around 26°C and lows near 14°C. Over 55 years of records, the warmest August 17th was in 1987 (27°C average), while the coldest was 1979 (14°C) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 42% of August 17th dates historically, with the wettest August 17th recording 2.78" of rain. The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for August 17th in Ottawa? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 33°C (91°F) | 13°C (56°F) | 5 mm |
| 2024 | 30°C (86°F) | 18°C (64°F) | 11 mm |
| 2023 | 27°C (80°F) | 16°C (60°F) | 18 mm |
| 2022 | 28°C (82°F) | 17°C (63°F) | 10 mm |
| 2021 | 23°C (74°F) | 14°C (57°F) | 0 mm |
| 2020 | 25°C (77°F) | 16°C (60°F) | 71 mm |
| 2019 | 24°C (75°F) | 17°C (63°F) | 8 mm |
| 2018 | 25°C (77°F) | 17°C (62°F) | 2 mm |
| 2017 | 26°C (78°F) | 13°C (55°F) | 60 mm |
| 2016 | 28°C (82°F) | 16°C (61°F) | 0 mm |
| 2015 | 32°C (89°F) | 19°C (66°F) | 0 mm |
| 2014 | 21°C (70°F) | 12°C (53°F) | 11 mm |
| 2013 | 26°C (78°F) | 9°C (49°F) | 0 mm |
| 2012 | 26°C (79°F) | 16°C (61°F) | 0 mm |
| 2011 | -- | 10°C (50°F) | -- |
| 2010 | 26°C (79°F) | 13°C (55°F) | 0 mm |
| 2009 | 32°C (90°F) | 19°C (66°F) | 5 mm |
| 2008 | 26°C (78°F) | 16°C (61°F) | 0 mm |
| 2007 | 23°C (73°F) | 8°C (47°F) | 4 mm |
| 2006 | 27°C (81°F) | 11°C (52°F) | 0 mm |
| 2005 | 23°C (73°F) | 9°C (49°F) | 0 mm |
| 2004 | 24°C (76°F) | 12°C (53°F) | 0 mm |
| 2003 | 25°C (77°F) | 15°C (59°F) | 0 mm |
| 2002 | 29°C (85°F) | 16°C (61°F) | 0 mm |
| 2001 | 29°C (85°F) | 18°C (64°F) | 12 mm |
| 2000 | 18°C (65°F) | 11°C (52°F) | 0 mm |
| 1999 | 28°C (82°F) | 14°C (57°F) | 0 mm |
| 1998 | 31°C (87°F) | 14°C (58°F) | 1 mm |
| 1997 | 21°C (70°F) | 12°C (54°F) | 0 mm |
| 1996 | 25°C (77°F) | 16°C (60°F) | 0 mm |
| 1995 | 31°C (88°F) | 18°C (65°F) | 0 mm |
| 1994 | 26°C (79°F) | 12°C (53°F) | 0 mm |
| 1993 | 29°C (84°F) | 16°C (61°F) | 0 mm |
| 1992 | 24°C (76°F) | 17°C (62°F) | 0 mm |
| 1991 | 31°C (88°F) | 16°C (61°F) | 19 mm |
| 1990 | 29°C (85°F) | 15°C (59°F) | 0 mm |
| 1989 | 21°C (70°F) | 13°C (55°F) | 0 mm |
| 1988 | 23°C (73°F) | 17°C (63°F) | 0 mm |
| 1987 | 33°C (91°F) | 21°C (70°F) | 3 mm |
| 1986 | 29°C (84°F) | 16°C (61°F) | 35 mm |
| 1985 | 26°C (78°F) | 12°C (53°F) | 0 mm |
| 1984 | 18°C (65°F) | 11°C (52°F) | 0 mm |
| 1983 | 26°C (78°F) | 16°C (61°F) | 4 mm |
| 1982 | 24°C (75°F) | 18°C (65°F) | 0 mm |
| 1981 | 22°C (72°F) | 11°C (51°F) | 0 mm |
| 1980 | 25°C (77°F) | 12°C (53°F) | 0 mm |
| 1979 | 23°C (73°F) | 5°C (41°F) | 4 mm |
| 1978 | 28°C (82°F) | 21°C (69°F) | 1 mm |
| 1977 | 22°C (71°F) | 13°C (56°F) | 1 mm |
| 1976 | 25°C (77°F) | 13°C (55°F) | 0 mm |
| 1975 | 28°C (82°F) | 16°C (61°F) | 3 mm |
| 1974 | 23°C (73°F) | 17°C (62°F) | 1 mm |
| 1973 | 29°C (85°F) | 16°C (61°F) | 0 mm |
| 1972 | 21°C (70°F) | 13°C (55°F) | 15 mm |
| 1971 | 28°C (83°F) | 14°C (58°F) | 0 mm |