Weather on May 15 in Ottawa
Historical weather data for May 15 in Ottawa, Canada
Based on 56 years of data from OTTAWA CDA
About This Date
May 15th in Ottawa, Canada typically brings mild spring weather, with average highs around 19°C and lows near 8°C. Over 56 years of records, the warmest May 15th was in 2014 (23°C average), while the coldest was 2016 (7°C) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 45% of May 15th dates historically, with the wettest May 15th recording 2.83" of rain. The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.0°F warmer on this date compared to 20-30 years ago.
Planning for May 15th in Ottawa? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2026 | 18°C (64°F) | 8°C (47°F) | -- |
| 2025 | 24°C (76°F) | 12°C (54°F) | 2 mm |
| 2024 | 22°C (71°F) | 11°C (52°F) | 1 mm |
| 2023 | 23°C (74°F) | 8°C (46°F) | 0 mm |
| 2022 | 26°C (78°F) | 16°C (61°F) | 72 mm |
| 2021 | 24°C (75°F) | 11°C (52°F) | 0 mm |
| 2020 | 13°C (55°F) | 9°C (49°F) | 46 mm |
| 2019 | 13°C (56°F) | 3°C (37°F) | 1 mm |
| 2018 | 20°C (68°F) | 13°C (55°F) | 0 mm |
| 2017 | 19°C (67°F) | 8°C (47°F) | 0 mm |
| 2016 | 9°C (49°F) | 4°C (39°F) | 1 mm |
| 2015 | 21°C (69°F) | 5°C (41°F) | 0 mm |
| 2014 | 29°C (84°F) | 18°C (64°F) | 11 mm |
| 2013 | 17°C (62°F) | 2°C (35°F) | 4 mm |
| 2012 | 24°C (75°F) | 12°C (53°F) | 0 mm |
| 2011 | 13°C (56°F) | 8°C (47°F) | 6 mm |
| 2010 | 17°C (62°F) | 10°C (50°F) | 0 mm |
| 2009 | 19°C (66°F) | 7°C (45°F) | 0 mm |
| 2008 | 19°C (66°F) | 12°C (53°F) | 0 mm |
| 2007 | 17°C (63°F) | 10°C (50°F) | 38 mm |
| 2006 | 19°C (66°F) | 11°C (52°F) | 3 mm |
| 2005 | 19°C (67°F) | 7°C (45°F) | 0 mm |
| 2004 | 20°C (68°F) | 16°C (61°F) | 0 mm |
| 2003 | 20°C (68°F) | 10°C (50°F) | 0 mm |
| 2002 | 16°C (61°F) | 3°C (37°F) | 0 mm |
| 2001 | 21°C (70°F) | 5°C (41°F) | 0 mm |
| 2000 | 14°C (58°F) | 5°C (41°F) | 0 mm |
| 1999 | 25°C (77°F) | 6°C (43°F) | 0 mm |
| 1998 | 29°C (85°F) | 13°C (55°F) | 0 mm |
| 1997 | 15°C (59°F) | 8°C (46°F) | 8 mm |
| 1996 | 19°C (67°F) | 3°C (37°F) | 0 mm |
| 1995 | 16°C (61°F) | 11°C (52°F) | 0 mm |
| 1994 | 17°C (62°F) | 4°C (40°F) | 32 mm |
| 1993 | 21°C (69°F) | 9°C (48°F) | 8 mm |
| 1992 | 19°C (67°F) | 3°C (37°F) | 0 mm |
| 1991 | 25°C (77°F) | 4°C (39°F) | 0 mm |
| 1990 | 19°C (67°F) | 8°C (47°F) | 2 mm |
| 1989 | 22°C (71°F) | 6°C (42°F) | 0 mm |
| 1988 | 19°C (67°F) | 3°C (38°F) | 13 mm |
| 1987 | 11°C (52°F) | 6°C (43°F) | 0 mm |
| 1986 | 21°C (70°F) | 12°C (54°F) | 2 mm |
| 1985 | 22°C (72°F) | 6°C (43°F) | 3 mm |
| 1984 | 12°C (53°F) | 4°C (39°F) | 2 mm |
| 1983 | 16°C (61°F) | 14°C (57°F) | 0 mm |
| 1982 | 21°C (70°F) | 7°C (45°F) | 0 mm |
| 1981 | 17°C (62°F) | 9°C (49°F) | 69 mm |
| 1980 | 15°C (59°F) | 6°C (42°F) | 5 mm |
| 1979 | 19°C (67°F) | 8°C (46°F) | 7 mm |
| 1978 | 15°C (59°F) | 10°C (50°F) | 7 mm |
| 1977 | 21°C (70°F) | 4°C (39°F) | 0 mm |
| 1976 | 22°C (72°F) | 7°C (44°F) | 0 mm |
| 1975 | 24°C (75°F) | 11°C (52°F) | 21 mm |
| 1974 | 22°C (71°F) | 14°C (58°F) | 12 mm |
| 1973 | 13°C (55°F) | 2°C (36°F) | 0 mm |
| 1972 | 20°C (68°F) | 12°C (54°F) | 0 mm |
| 1971 | 21°C (70°F) | 1°C (33°F) | 0 mm |