Weather on September 4 in Ottawa
Historical weather data for September 4 in Ottawa, Canada
Based on 55 years of data from OTTAWA CDA
About This Date
September 4th in Ottawa, Canada typically brings pleasant fall weather, with average highs around 23°C and lows near 13°C. Over 55 years of records, the warmest September 4th was in 1999 (25°C average), while the coldest was 1974 (11°C) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 22% of September 4th dates historically, with the wettest September 4th recording 0.93" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 4th in Ottawa? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2026 | 23°C (73°F) | 16°C (61°F) | -- |
| 2025 | 26°C (78°F) | 14°C (58°F) | -- |
| 2023 | 31°C (87°F) | 18°C (64°F) | 0 mm |
| 2022 | 20°C (68°F) | 13°C (55°F) | 0 mm |
| 2021 | 25°C (77°F) | 11°C (51°F) | 0 mm |
| 2020 | 21°C (70°F) | 12°C (54°F) | 1 mm |
| 2019 | 23°C (73°F) | 14°C (57°F) | 0 mm |
| 2018 | 26°C (79°F) | 17°C (62°F) | 0 mm |
| 2017 | 23°C (73°F) | 10°C (50°F) | 24 mm |
| 2016 | 26°C (79°F) | 8°C (46°F) | 0 mm |
| 2015 | 26°C (79°F) | 13°C (55°F) | 0 mm |
| 2014 | 28°C (82°F) | 13°C (56°F) | 1 mm |
| 2013 | 19°C (67°F) | 12°C (54°F) | 0 mm |
| 2012 | 26°C (78°F) | 17°C (63°F) | 13 mm |
| 2011 | 28°C (82°F) | 19°C (66°F) | 6 mm |
| 2010 | 21°C (69°F) | 14°C (58°F) | 0 mm |
| 2009 | 26°C (78°F) | 12°C (54°F) | 0 mm |
| 2008 | 26°C (78°F) | 18°C (65°F) | 0 mm |
| 2007 | 22°C (71°F) | 13°C (55°F) | 0 mm |
| 2006 | 19°C (67°F) | 14°C (57°F) | 1 mm |
| 2005 | 21°C (69°F) | 9°C (49°F) | 0 mm |
| 2004 | 24°C (76°F) | 17°C (62°F) | 0 mm |
| 2003 | 23°C (74°F) | 17°C (62°F) | 0 mm |
| 2002 | 24°C (76°F) | 13°C (56°F) | 0 mm |
| 2001 | 23°C (73°F) | 17°C (63°F) | 1 mm |
| 2000 | 17°C (63°F) | 11°C (52°F) | 0 mm |
| 1999 | 33°C (92°F) | 16°C (61°F) | 0 mm |
| 1998 | 22°C (71°F) | 9°C (48°F) | 0 mm |
| 1997 | 20°C (68°F) | 5°C (41°F) | 0 mm |
| 1996 | 29°C (84°F) | 14°C (58°F) | 0 mm |
| 1995 | 25°C (77°F) | 11°C (51°F) | 0 mm |
| 1994 | 19°C (66°F) | 6°C (43°F) | 0 mm |
| 1993 | 21°C (70°F) | 12°C (54°F) | 0 mm |
| 1992 | 22°C (71°F) | 12°C (54°F) | 0 mm |
| 1991 | 23°C (73°F) | 16°C (61°F) | 0 mm |
| 1990 | 23°C (74°F) | 8°C (46°F) | 2 mm |
| 1989 | 23°C (73°F) | 7°C (44°F) | 0 mm |
| 1988 | 20°C (68°F) | 16°C (60°F) | 9 mm |
| 1987 | 22°C (72°F) | 6°C (42°F) | 0 mm |
| 1986 | 21°C (70°F) | 13°C (55°F) | 4 mm |
| 1985 | 28°C (83°F) | 15°C (59°F) | 0 mm |
| 1984 | 19°C (66°F) | 8°C (46°F) | 0 mm |
| 1983 | 32°C (90°F) | 17°C (62°F) | 0 mm |
| 1982 | 20°C (68°F) | 11°C (52°F) | 0 mm |
| 1981 | 22°C (72°F) | 17°C (63°F) | 9 mm |
| 1980 | 24°C (76°F) | 11°C (52°F) | 0 mm |
| 1979 | 21°C (70°F) | 9°C (49°F) | 0 mm |
| 1978 | 23°C (73°F) | 9°C (48°F) | 0 mm |
| 1977 | 23°C (73°F) | 8°C (46°F) | 1 mm |
| 1976 | 23°C (73°F) | 14°C (57°F) | 0 mm |
| 1975 | 22°C (72°F) | 9°C (48°F) | 0 mm |
| 1974 | 20°C (68°F) | 2°C (36°F) | 0 mm |
| 1973 | 29°C (85°F) | 20°C (68°F) | 0 mm |
| 1972 | 20°C (68°F) | 12°C (54°F) | 0 mm |
| 1971 | 28°C (82°F) | 19°C (67°F) | 0 mm |