Weather on August 20 in Ottawa
Historical weather data for August 20 in Ottawa, Canada
Based on 55 years of data from OTTAWA CDA
About This Date
August 20th in Ottawa, Canada typically brings pleasant summer weather, with average highs around 24°C and lows near 14°C. Over 55 years of records, the warmest August 20th was in 2021 (25°C average), while the coldest was 2007 (13°C) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 40% of August 20th dates historically, with the wettest August 20th recording 2" of rain. The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.8°F warmer on this date compared to 20-30 years ago.
Planning for August 20th in Ottawa? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 23°C (73°F) | 15°C (59°F) | -- |
| 2024 | 20°C (68°F) | 11°C (52°F) | 1 mm |
| 2023 | 27°C (81°F) | 14°C (58°F) | 0 mm |
| 2022 | 30°C (86°F) | 17°C (62°F) | 3 mm |
| 2021 | 33°C (91°F) | 17°C (63°F) | 0 mm |
| 2020 | 19°C (67°F) | 9°C (49°F) | 1 mm |
| 2019 | 28°C (83°F) | 19°C (66°F) | 3 mm |
| 2018 | 28°C (82°F) | 13°C (55°F) | 0 mm |
| 2017 | 26°C (79°F) | 16°C (61°F) | 0 mm |
| 2016 | 30°C (86°F) | 16°C (61°F) | 16 mm |
| 2015 | 28°C (83°F) | 20°C (68°F) | 51 mm |
| 2014 | 25°C (77°F) | 13°C (56°F) | 40 mm |
| 2013 | 31°C (87°F) | 16°C (60°F) | 0 mm |
| 2012 | 23°C (74°F) | -- | -- |
| 2011 | 28°C (83°F) | 14°C (57°F) | 13 mm |
| 2010 | 23°C (73°F) | 11°C (51°F) | 0 mm |
| 2009 | 22°C (71°F) | 13°C (55°F) | 21 mm |
| 2008 | 22°C (72°F) | 7°C (45°F) | 0 mm |
| 2007 | 21°C (69°F) | 6°C (43°F) | 0 mm |
| 2006 | 18°C (64°F) | 17°C (62°F) | 8 mm |
| 2005 | 22°C (71°F) | 18°C (64°F) | 16 mm |
| 2004 | 21°C (70°F) | 8°C (46°F) | 0 mm |
| 2003 | 31°C (87°F) | 18°C (65°F) | 0 mm |
| 2002 | 26°C (78°F) | 12°C (54°F) | 1 mm |
| 2001 | 24°C (76°F) | 18°C (64°F) | 3 mm |
| 2000 | 19°C (67°F) | 9°C (49°F) | 0 mm |
| 1999 | 27°C (81°F) | 13°C (56°F) | 0 mm |
| 1998 | 24°C (76°F) | 7°C (45°F) | 12 mm |
| 1997 | 24°C (76°F) | 8°C (46°F) | 2 mm |
| 1996 | 26°C (78°F) | 13°C (55°F) | 6 mm |
| 1995 | 31°C (87°F) | 14°C (57°F) | 0 mm |
| 1994 | 28°C (83°F) | 17°C (63°F) | 48 mm |
| 1993 | 22°C (72°F) | 18°C (65°F) | 9 mm |
| 1992 | 19°C (66°F) | 11°C (51°F) | 0 mm |
| 1991 | 25°C (77°F) | 13°C (56°F) | 0 mm |
| 1990 | 22°C (72°F) | 11°C (51°F) | 0 mm |
| 1989 | 24°C (75°F) | 18°C (64°F) | 33 mm |
| 1988 | 22°C (72°F) | 13°C (55°F) | 20 mm |
| 1987 | 24°C (75°F) | 13°C (56°F) | 0 mm |
| 1986 | 26°C (78°F) | 14°C (57°F) | 0 mm |
| 1985 | 22°C (72°F) | 13°C (56°F) | 1 mm |
| 1984 | 19°C (67°F) | 8°C (47°F) | 0 mm |
| 1983 | 26°C (79°F) | 20°C (68°F) | 0 mm |
| 1982 | 23°C (73°F) | 17°C (63°F) | 0 mm |
| 1981 | 27°C (81°F) | 12°C (54°F) | 0 mm |
| 1980 | 24°C (76°F) | 18°C (64°F) | 0 mm |
| 1979 | 23°C (74°F) | 12°C (53°F) | 0 mm |
| 1978 | 22°C (72°F) | 17°C (62°F) | 0 mm |
| 1977 | 18°C (65°F) | 9°C (49°F) | 0 mm |
| 1976 | 29°C (84°F) | 17°C (62°F) | 0 mm |
| 1975 | 24°C (75°F) | 10°C (50°F) | 0 mm |
| 1974 | 28°C (83°F) | 13°C (56°F) | 0 mm |
| 1973 | 27°C (81°F) | 17°C (62°F) | 0 mm |
| 1972 | 24°C (75°F) | 9°C (48°F) | 0 mm |
| 1971 | 27°C (80°F) | 18°C (65°F) | 2 mm |