Weather on September 14 in Ottawa
Historical weather data for September 14 in Ottawa, Canada
Based on 54 years of data from OTTAWA CDA RCS
About This Date
September 14th in Ottawa, Canada typically brings mild fall weather, with average highs around 21°C and lows near 11°C. Over 54 years of records, the warmest September 14th was in 2003 (23°C average), while the coldest was 1986 (8°C) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 52% of September 14th dates historically, with the wettest September 14th recording 3.28" of rain. The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
Planning for September 14th 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) | 12°C (53°F) | -- |
| 2023 | 27°C (80°F) | 12°C (53°F) | 0 mm |
| 2022 | 21°C (70°F) | 9°C (49°F) | 7 mm |
| 2021 | 23°C (73°F) | 8°C (46°F) | 52 mm |
| 2020 | 14°C (58°F) | 4°C (40°F) | 0 mm |
| 2019 | 23°C (73°F) | 14°C (57°F) | 9 mm |
| 2018 | 28°C (83°F) | 13°C (55°F) | 0 mm |
| 2017 | 27°C (81°F) | 13°C (55°F) | 0 mm |
| 2016 | 18°C (65°F) | 16°C (60°F) | 0 mm |
| 2015 | 23°C (74°F) | 14°C (57°F) | 2 mm |
| 2014 | 13°C (55°F) | 6°C (43°F) | 0 mm |
| 2013 | 17°C (63°F) | 6°C (43°F) | 0 mm |
| 2012 | 20°C (68°F) | 16°C (60°F) | 38 mm |
| 2011 | 21°C (69°F) | 12°C (53°F) | 0 mm |
| 2010 | 18°C (64°F) | 11°C (52°F) | 9 mm |
| 2009 | 23°C (73°F) | 8°C (47°F) | 28 mm |
| 2008 | 27°C (80°F) | 16°C (61°F) | 55 mm |
| 2007 | 26°C (78°F) | 8°C (46°F) | 18 mm |
| 2006 | 18°C (64°F) | 13°C (55°F) | 5 mm |
| 2005 | 30°C (86°F) | 17°C (63°F) | 9 mm |
| 2004 | 27°C (80°F) | 9°C (49°F) | 0 mm |
| 2003 | 28°C (83°F) | 18°C (65°F) | 0 mm |
| 2002 | 27°C (80°F) | 12°C (53°F) | 8 mm |
| 2001 | 18°C (64°F) | 7°C (44°F) | 0 mm |
| 2000 | 17°C (62°F) | 14°C (58°F) | 83 mm |
| 1999 | 23°C (73°F) | 15°C (59°F) | 3 mm |
| 1998 | 17°C (63°F) | 8°C (46°F) | 15 mm |
| 1997 | 23°C (74°F) | 13°C (55°F) | 0 mm |
| 1996 | 18°C (65°F) | 12°C (54°F) | 14 mm |
| 1995 | 14°C (58°F) | 11°C (51°F) | 0 mm |
| 1994 | 21°C (69°F) | 13°C (55°F) | 0 mm |
| 1993 | 28°C (82°F) | 18°C (64°F) | 4 mm |
| 1992 | 24°C (75°F) | 7°C (45°F) | 0 mm |
| 1991 | 22°C (71°F) | 11°C (52°F) | 12 mm |
| 1990 | 24°C (76°F) | 12°C (54°F) | 9 mm |
| 1989 | 16°C (60°F) | 11°C (51°F) | 10 mm |
| 1988 | 19°C (66°F) | 7°C (44°F) | 3 mm |
| 1987 | 21°C (69°F) | 13°C (56°F) | 0 mm |
| 1986 | 13°C (55°F) | 3°C (38°F) | 0 mm |
| 1985 | 19°C (67°F) | 7°C (44°F) | 0 mm |
| 1984 | 16°C (61°F) | 12°C (54°F) | 1 mm |
| 1983 | 18°C (65°F) | 3°C (37°F) | 0 mm |
| 1982 | 25°C (77°F) | 16°C (60°F) | 12 mm |
| 1981 | 21°C (69°F) | 14°C (58°F) | 1 mm |
| 1980 | 14°C (57°F) | 12°C (53°F) | 1 mm |
| 1979 | 17°C (63°F) | 14°C (58°F) | 77 mm |
| 1978 | 20°C (68°F) | 5°C (41°F) | 5 mm |
| 1977 | 17°C (62°F) | 13°C (55°F) | 16 mm |
| 1976 | 28°C (82°F) | 13°C (56°F) | 0 mm |
| 1975 | 14°C (57°F) | 5°C (41°F) | 0 mm |
| 1974 | 17°C (63°F) | 9°C (49°F) | 0 mm |
| 1973 | 20°C (68°F) | 9°C (49°F) | 0 mm |
| 1972 | 19°C (66°F) | 14°C (58°F) | 0 mm |
| 1971 | 21°C (70°F) | 16°C (60°F) | 0 mm |