Weather on July 21 in Ottawa
Historical weather data for July 21 in Ottawa, Canada
Avg High27°C (80°F)
Avg Low16°C (61°F)
Warmest201129°C
Coldest199213°C
Based on 55 years of data from OTTAWA CDA
About This Date
July 21st in Ottawa, Canada typically brings warm summer weather, with average highs around 27°C and lows near 16°C. Over 55 years of records, the warmest July 21st was in 2011 (29°C average), while the coldest was 1992 (13°C) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 24% of July 21st dates historically, with the wettest July 21st recording 0.94" of rain. The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.4°F warmer on this date compared to 20-30 years ago.
Planning for July 21st in Ottawa? Stay hydrated and seek shade during peak afternoon hours.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 26°C (78°F) | 13°C (55°F) | 5 mm |
| 2024 | 28°C (82°F) | 13°C (56°F) | 3 mm |
| 2023 | 23°C (74°F) | 18°C (64°F) | 23 mm |
| 2022 | 29°C (84°F) | 22°C (72°F) | 14 mm |
| 2021 | 25°C (77°F) | 16°C (60°F) | 0 mm |
| 2020 | 26°C (78°F) | 17°C (62°F) | 0 mm |
| 2019 | 29°C (84°F) | 18°C (65°F) | 0 mm |
| 2018 | 31°C (88°F) | 18°C (64°F) | 0 mm |
| 2017 | 28°C (82°F) | 17°C (62°F) | 0 mm |
| 2016 | 32°C (89°F) | 14°C (57°F) | 0 mm |
| 2015 | 26°C (79°F) | 15°C (59°F) | 3 mm |
| 2014 | 28°C (83°F) | 17°C (62°F) | 0 mm |
| 2013 | 23°C (73°F) | 13°C (55°F) | 0 mm |
| 2012 | 29°C (85°F) | 10°C (50°F) | 0 mm |
| 2011 | 36°C (97°F) | 23°C (74°F) | 0 mm |
| 2010 | 26°C (78°F) | 17°C (63°F) | 0 mm |
| 2009 | 26°C (78°F) | 13°C (56°F) | 9 mm |
| 2008 | 24°C (76°F) | 16°C (61°F) | 0 mm |
| 2007 | 25°C (77°F) | 13°C (55°F) | 0 mm |
| 2006 | 26°C (78°F) | 17°C (63°F) | 0 mm |
| 2005 | 32°C (89°F) | 18°C (64°F) | 0 mm |
| 2004 | 29°C (85°F) | 16°C (60°F) | 0 mm |
| 2003 | 23°C (73°F) | 16°C (60°F) | 0 mm |
| 2002 | 29°C (85°F) | 14°C (58°F) | 0 mm |
| 2001 | 30°C (86°F) | 18°C (64°F) | 0 mm |
| 2000 | 20°C (68°F) | 14°C (57°F) | 24 mm |
| 1999 | 28°C (83°F) | 13°C (56°F) | 0 mm |
| 1998 | 32°C (89°F) | 16°C (60°F) | 0 mm |
| 1997 | 24°C (76°F) | 16°C (60°F) | 0 mm |
| 1996 | 26°C (79°F) | 14°C (58°F) | 0 mm |
| 1995 | 27°C (80°F) | 16°C (61°F) | 0 mm |
| 1994 | 31°C (88°F) | 22°C (71°F) | 13 mm |
| 1993 | 23°C (74°F) | 13°C (56°F) | 0 mm |
| 1992 | 18°C (65°F) | 8°C (46°F) | 0 mm |
| 1991 | 28°C (82°F) | 19°C (66°F) | 1 mm |
| 1990 | 28°C (82°F) | 15°C (59°F) | 9 mm |
| 1989 | 28°C (82°F) | 12°C (53°F) | 0 mm |
| 1988 | 26°C (79°F) | 18°C (64°F) | 0 mm |
| 1987 | 29°C (85°F) | 19°C (66°F) | 0 mm |
| 1986 | 22°C (72°F) | 13°C (55°F) | 0 mm |
| 1985 | 28°C (83°F) | 13°C (56°F) | 0 mm |
| 1984 | 28°C (83°F) | 15°C (59°F) | 0 mm |
| 1983 | 23°C (73°F) | 18°C (64°F) | 24 mm |
| 1982 | 27°C (81°F) | 12°C (54°F) | 0 mm |
| 1981 | 22°C (72°F) | 19°C (67°F) | 0 mm |
| 1980 | 23°C (74°F) | 17°C (62°F) | 4 mm |
| 1979 | 31°C (87°F) | 14°C (58°F) | 0 mm |
| 1978 | 28°C (82°F) | 22°C (71°F) | 0 mm |
| 1977 | 28°C (83°F) | 24°C (75°F) | 0 mm |
| 1976 | 24°C (75°F) | 16°C (61°F) | 0 mm |
| 1975 | 26°C (78°F) | 18°C (65°F) | 3 mm |
| 1974 | 25°C (77°F) | 13°C (56°F) | 0 mm |
| 1973 | 27°C (80°F) | 16°C (60°F) | 0 mm |
| 1972 | 30°C (86°F) | 22°C (71°F) | 0 mm |
| 1971 | 26°C (79°F) | 12°C (53°F) | 0 mm |