Weather on September 16 in Ottawa
Historical weather data for September 16 in Ottawa, Canada
Based on 55 years of data from OTTAWA CDA
About This Date
September 16th in Ottawa, Canada typically brings mild fall weather, with average highs around 20°C and lows near 9°C. Over 55 years of records, the warmest September 16th was in 2018 (23°C average), while the coldest was 1986 (9°C) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 29% of September 16th dates historically, with the wettest September 16th recording 1.58" of rain. The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.
Planning for September 16th in Ottawa? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 25°C (77°F) | 8°C (47°F) | -- |
| 2024 | 29°C (84°F) | 13°C (55°F) | 0" |
| 2023 | 23°C (74°F) | 7°C (44°F) | 0" |
| 2022 | 18°C (64°F) | 11°C (51°F) | 0" |
| 2021 | 23°C (74°F) | 8°C (47°F) | 0" |
| 2020 | 23°C (73°F) | 8°C (46°F) | 0" |
| 2019 | 22°C (71°F) | 5°C (41°F) | 0" |
| 2018 | 30°C (86°F) | 17°C (62°F) | 0" |
| 2017 | 27°C (81°F) | 15°C (59°F) | 0" |
| 2016 | 22°C (72°F) | 4°C (40°F) | 0" |
| 2015 | 29°C (85°F) | 13°C (56°F) | 0" |
| 2014 | 18°C (64°F) | 9°C (49°F) | 0" |
| 2013 | 12°C (54°F) | 6°C (43°F) | 0" |
| 2012 | 18°C (64°F) | 4°C (39°F) | 0" |
| 2011 | 14°C (57°F) | 4°C (40°F) | 0" |
| 2010 | 13°C (55°F) | 7°C (44°F) | 1.58" |
| 2009 | 16°C (60°F) | 6°C (42°F) | 0" |
| 2008 | 18°C (64°F) | 3°C (38°F) | 0" |
| 2007 | 17°C (63°F) | 3°C (37°F) | 0" |
| 2006 | 24°C (75°F) | 9°C (49°F) | 0" |
| 2005 | 19°C (67°F) | 15°C (59°F) | 1.4" |
| 2004 | 26°C (78°F) | 13°C (56°F) | 0" |
| 2003 | 23°C (74°F) | 14°C (57°F) | 0" |
| 2002 | 22°C (71°F) | 11°C (51°F) | 0" |
| 2001 | 22°C (72°F) | 7°C (45°F) | 0" |
| 2000 | 12°C (54°F) | 9°C (48°F) | 0.04" |
| 1999 | 18°C (64°F) | 12°C (54°F) | 0.1" |
| 1998 | 20°C (68°F) | 9°C (49°F) | 0" |
| 1997 | 18°C (65°F) | 11°C (52°F) | 0" |
| 1996 | 15°C (59°F) | 12°C (53°F) | 0" |
| 1995 | 20°C (68°F) | 3°C (38°F) | 0.02" |
| 1994 | 28°C (83°F) | 13°C (55°F) | 0.53" |
| 1993 | 16°C (60°F) | 5°C (41°F) | 0" |
| 1992 | 24°C (76°F) | 13°C (56°F) | 0" |
| 1991 | 29°C (84°F) | 16°C (60°F) | 1.36" |
| 1990 | 14°C (57°F) | 6°C (42°F) | 0" |
| 1989 | 17°C (63°F) | 7°C (44°F) | 0.32" |
| 1988 | 18°C (64°F) | 2°C (36°F) | 0" |
| 1987 | 24°C (75°F) | 11°C (51°F) | 0" |
| 1986 | 13°C (55°F) | 6°C (42°F) | 0.02" |
| 1985 | 21°C (70°F) | 7°C (44°F) | 0" |
| 1984 | 16°C (60°F) | 6°C (43°F) | 0.12" |
| 1983 | 17°C (62°F) | 8°C (46°F) | 0.8" |
| 1982 | 17°C (63°F) | 10°C (50°F) | 0.1" |
| 1981 | 17°C (63°F) | 6°C (43°F) | 0" |
| 1980 | 21°C (69°F) | 5°C (41°F) | 0" |
| 1979 | 19°C (67°F) | 9°C (48°F) | 0" |
| 1978 | 17°C (63°F) | 13°C (55°F) | 0" |
| 1977 | 15°C (59°F) | 11°C (51°F) | 0.3" |
| 1976 | 23°C (73°F) | 15°C (59°F) | 0" |
| 1975 | 19°C (67°F) | 11°C (52°F) | 0.03" |
| 1974 | 15°C (59°F) | 7°C (45°F) | 0" |
| 1973 | 13°C (56°F) | 8°C (47°F) | 0" |
| 1972 | 22°C (71°F) | 13°C (56°F) | 0.13" |
| 1971 | 20°C (68°F) | 10°C (50°F) | 0.08" |