Weather on October 18 in Ottawa
Historical weather data for October 18 in Ottawa, Canada
Based on 54 years of data from OTTAWA CDA
About This Date
October 18th in Ottawa, Canada typically brings cool fall weather, with average highs around 13°C and lows near 3°C. Over 54 years of records, the warmest October 18th was in 1998 (16°C average), while the coldest was 2015 (-2°C) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 39% of October 18th dates historically, with the wettest October 18th recording 1.69" of rain. The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.3°F warmer on this date compared to 20-30 years ago.
Planning for October 18th in Ottawa? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 18°C (65°F) | 8°C (46°F) | -- |
| 2023 | 16°C (60°F) | 3°C (37°F) | 0 mm |
| 2022 | 11°C (52°F) | 4°C (39°F) | 2 mm |
| 2021 | 12°C (53°F) | 6°C (43°F) | 1 mm |
| 2020 | 14°C (57°F) | 4°C (40°F) | 0 mm |
| 2019 | 9°C (48°F) | 2°C (36°F) | 0 mm |
| 2018 | 5°C (41°F) | -2°C (29°F) | 0 mm |
| 2017 | 22°C (71°F) | 6°C (43°F) | 4 mm |
| 2016 | 24°C (75°F) | 8°C (46°F) | 0 mm |
| 2015 | 2°C (36°F) | -6°C (22°F) | 1 mm |
| 2014 | 14°C (58°F) | 9°C (48°F) | 1 mm |
| 2013 | 14°C (57°F) | 8°C (46°F) | 4 mm |
| 2012 | 22°C (71°F) | 6°C (43°F) | 4 mm |
| 2011 | 16°C (60°F) | 7°C (45°F) | 1 mm |
| 2010 | 11°C (52°F) | 3°C (38°F) | 0 mm |
| 2009 | 10°C (50°F) | -4°C (25°F) | 0 mm |
| 2008 | 12°C (53°F) | -4°C (25°F) | 0 mm |
| 2007 | 17°C (63°F) | 7°C (45°F) | 0 mm |
| 2006 | 15°C (59°F) | 7°C (45°F) | 1 mm |
| 2005 | 12°C (54°F) | 4°C (39°F) | 5 mm |
| 2004 | 8°C (47°F) | 3°C (37°F) | 0 mm |
| 2003 | 7°C (44°F) | 3°C (38°F) | 0 mm |
| 2002 | 11°C (52°F) | 1°C (34°F) | 43 mm |
| 2001 | 9°C (49°F) | 1°C (33°F) | 0 mm |
| 2000 | 14°C (58°F) | 8°C (46°F) | 7 mm |
| 1999 | 8°C (46°F) | 5°C (41°F) | 0 mm |
| 1998 | 22°C (71°F) | 10°C (50°F) | 0 mm |
| 1997 | 13°C (56°F) | -3°C (27°F) | 0 mm |
| 1996 | 12°C (53°F) | 3°C (37°F) | 0 mm |
| 1995 | 19°C (67°F) | 5°C (41°F) | 0 mm |
| 1994 | 10°C (50°F) | 7°C (45°F) | 4 mm |
| 1993 | 12°C (53°F) | 8°C (46°F) | 0 mm |
| 1992 | 8°C (47°F) | -1°C (30°F) | 6 mm |
| 1991 | 18°C (65°F) | 2°C (35°F) | 8 mm |
| 1990 | 21°C (69°F) | 7°C (45°F) | 42 mm |
| 1989 | 4°C (39°F) | 1°C (33°F) | 0 mm |
| 1988 | 17°C (62°F) | 9°C (49°F) | 1 mm |
| 1987 | 13°C (56°F) | 8°C (47°F) | 0 mm |
| 1986 | 10°C (50°F) | -1°C (31°F) | 1 mm |
| 1985 | 18°C (65°F) | 6°C (42°F) | 16 mm |
| 1984 | 14°C (57°F) | 6°C (42°F) | 0 mm |
| 1983 | 13°C (55°F) | 4°C (39°F) | 0 mm |
| 1982 | 11°C (52°F) | -1°C (31°F) | 0 mm |
| 1981 | 12°C (54°F) | 3°C (37°F) | 18 mm |
| 1980 | 20°C (68°F) | 10°C (50°F) | 0 mm |
| 1979 | 11°C (52°F) | 2°C (36°F) | 0 mm |
| 1978 | 10°C (50°F) | -1°C (30°F) | 5 mm |
| 1977 | 7°C (45°F) | 1°C (33°F) | 0 mm |
| 1976 | 4°C (40°F) | -1°C (30°F) | 0 mm |
| 1975 | 9°C (49°F) | 3°C (38°F) | 0 mm |
| 1974 | 4°C (40°F) | -3°C (26°F) | 0 mm |
| 1973 | 8°C (47°F) | 2°C (35°F) | 0 mm |
| 1972 | 4°C (40°F) | -4°C (24°F) | 0 mm |
| 1971 | 20°C (68°F) | 4°C (39°F) | 0 mm |