Weather on September 5 in Ottawa
Historical weather data for September 5 in Ottawa, Canada
Based on 54 years of data from OTTAWA CDA
About This Date
September 5th in Ottawa, Canada typically brings pleasant fall weather, with average highs around 24°C and lows near 12°C. Over 54 years of records, the warmest September 5th was in 1973 (25°C average), while the coldest was 2000 (11°C) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 37% of September 5th dates historically, with the wettest September 5th recording 3.42" of rain. The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
Planning for September 5th 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 (74°F) | 8°C (47°F) | -- |
| 2023 | 33°C (91°F) | 17°C (63°F) | 0 mm |
| 2022 | 22°C (71°F) | 11°C (51°F) | 0 mm |
| 2021 | 24°C (76°F) | 16°C (60°F) | 7 mm |
| 2020 | 21°C (70°F) | 9°C (49°F) | 5 mm |
| 2019 | 22°C (72°F) | 7°C (44°F) | 0 mm |
| 2018 | 32°C (90°F) | 18°C (64°F) | 9 mm |
| 2017 | 21°C (70°F) | 13°C (55°F) | 4 mm |
| 2016 | 28°C (82°F) | 8°C (47°F) | 0 mm |
| 2015 | 28°C (83°F) | 13°C (55°F) | 0 mm |
| 2014 | 29°C (84°F) | 19°C (67°F) | 87 mm |
| 2013 | 17°C (63°F) | 8°C (47°F) | 0 mm |
| 2012 | 28°C (82°F) | 17°C (62°F) | 5 mm |
| 2011 | 19°C (67°F) | 13°C (56°F) | 6 mm |
| 2010 | 18°C (64°F) | 9°C (49°F) | 0 mm |
| 2009 | 22°C (71°F) | 13°C (55°F) | 0 mm |
| 2008 | 31°C (87°F) | 15°C (59°F) | 23 mm |
| 2007 | 19°C (67°F) | 7°C (45°F) | 2 mm |
| 2006 | 23°C (73°F) | 13°C (55°F) | 0 mm |
| 2005 | 24°C (76°F) | 8°C (47°F) | 0 mm |
| 2004 | 23°C (74°F) | 11°C (52°F) | 0 mm |
| 2003 | 20°C (68°F) | 12°C (54°F) | 0 mm |
| 2002 | 22°C (72°F) | 9°C (49°F) | 0 mm |
| 2001 | 21°C (69°F) | 9°C (48°F) | 0 mm |
| 2000 | 16°C (60°F) | 6°C (42°F) | 0 mm |
| 1999 | 31°C (88°F) | 19°C (66°F) | 57 mm |
| 1998 | 24°C (76°F) | 12°C (54°F) | 0 mm |
| 1997 | 24°C (76°F) | 8°C (47°F) | 2 mm |
| 1996 | 29°C (84°F) | 15°C (59°F) | 0 mm |
| 1995 | 26°C (78°F) | 12°C (53°F) | 0 mm |
| 1994 | 21°C (70°F) | 6°C (43°F) | 0 mm |
| 1993 | 22°C (72°F) | 13°C (55°F) | 0 mm |
| 1992 | 23°C (74°F) | 7°C (45°F) | 0 mm |
| 1991 | 23°C (74°F) | 11°C (52°F) | 0 mm |
| 1990 | 21°C (70°F) | 17°C (62°F) | 0 mm |
| 1989 | 23°C (73°F) | 13°C (56°F) | 0 mm |
| 1988 | 14°C (57°F) | 9°C (49°F) | 0 mm |
| 1987 | 26°C (78°F) | 7°C (44°F) | 0 mm |
| 1986 | 23°C (74°F) | 17°C (62°F) | 23 mm |
| 1985 | 22°C (72°F) | 16°C (60°F) | 10 mm |
| 1984 | -- | 8°C (47°F) | 1 mm |
| 1983 | 33°C (92°F) | 17°C (62°F) | 0 mm |
| 1982 | 23°C (74°F) | 7°C (45°F) | 25 mm |
| 1981 | 22°C (71°F) | 16°C (61°F) | 1 mm |
| 1980 | 27°C (81°F) | 15°C (59°F) | 0 mm |
| 1979 | 27°C (81°F) | 9°C (49°F) | 3 mm |
| 1978 | 20°C (68°F) | 13°C (56°F) | 1 mm |
| 1977 | 21°C (70°F) | 14°C (58°F) | 0 mm |
| 1976 | 17°C (63°F) | 13°C (55°F) | 3 mm |
| 1975 | 22°C (71°F) | 11°C (52°F) | 0 mm |
| 1974 | 22°C (72°F) | 5°C (41°F) | 0 mm |
| 1973 | 31°C (88°F) | 19°C (66°F) | 43 mm |
| 1972 | 22°C (71°F) | 9°C (49°F) | 0 mm |
| 1971 | 29°C (84°F) | 20°C (68°F) | 0 mm |