Weather on July 21 in Ottawa
Historical weather data for July 21 in Ottawa, Canada
Based on 56 years of data from OTTAWA CDA RCS
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 56 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 27% of July 21st dates historically, with the wettest July 21st recording 1.27" 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) |
|---|---|---|---|
| 2026 | 24°C (76°F) | 17°C (62°F) | -- |
| 2025 | 26°C (78°F) | 13°C (55°F) | 2 mm |
| 2024 | 28°C (82°F) | 13°C (56°F) | 1 mm |
| 2023 | 23°C (73°F) | 17°C (63°F) | 32 mm |
| 2022 | 29°C (84°F) | 22°C (72°F) | 6 mm |
| 2021 | 25°C (77°F) | 16°C (60°F) | 0 mm |
| 2020 | 26°C (79°F) | 16°C (61°F) | 0 mm |
| 2019 | 29°C (85°F) | 23°C (73°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 | 31°C (88°F) | 14°C (57°F) | 0 mm |
| 2015 | 26°C (79°F) | 15°C (59°F) | 1 mm |
| 2014 | 28°C (83°F) | 17°C (62°F) | 0 mm |
| 2013 | 22°C (72°F) | 12°C (53°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 | 24°C (76°F) | 13°C (56°F) | 2 mm |
| 2008 | 25°C (77°F) | 16°C (60°F) | 0 mm |
| 2007 | 25°C (77°F) | 12°C (54°F) | 0 mm |
| 2006 | 26°C (78°F) | 17°C (63°F) | 0 mm |
| 2005 | 31°C (88°F) | 18°C (64°F) | 0 mm |
| 2004 | 29°C (84°F) | 16°C (60°F) | 0 mm |
| 2003 | 23°C (73°F) | 16°C (61°F) | 0 mm |
| 2002 | 29°C (85°F) | 14°C (58°F) | 1 mm |
| 2001 | 30°C (86°F) | 18°C (64°F) | 1 mm |
| 2000 | 20°C (68°F) | 14°C (57°F) | 9 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) | 5 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) | 0 mm |
| 1990 | 28°C (82°F) | 15°C (59°F) | 4 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) | 9 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) | 2 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) | 1 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 |