Weather on May 1 in Ottawa
Historical weather data for May 1 in Ottawa, Canada
Based on 53 years of data from OTTAWA CDA
About This Date
May 1st in Ottawa, Canada typically brings mild spring weather, with average highs around 16°C and lows near 6°C. Over 53 years of records, the warmest May 1st was in 2004 (20°C average), while the coldest was 1978 (0°C) — a 36°F range across recorded history. Rain or other precipitation has occurred on about 57% of May 1st dates historically, with the wettest May 1st recording 5.54" of rain. The last decade has been 9.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 9.6°F cooler on this date compared to 20-30 years ago.
Planning for May 1st in Ottawa? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 16°C (60°F) | -1°C (31°F) | 0" |
| 2023 | 11°C (52°F) | 7°C (44°F) | 0.76" |
| 2022 | 19°C (67°F) | 2°C (36°F) | 0.08" |
| 2021 | 12°C (54°F) | -1°C (30°F) | 0.2" |
| 2019 | 6°C (43°F) | 3°C (38°F) | 0.9" |
| 2018 | -- | 1°C (34°F) | -- |
| 2017 | 9°C (49°F) | 4°C (40°F) | 5.54" |
| 2016 | 10°C (50°F) | 7°C (45°F) | 0.3" |
| 2015 | 21°C (69°F) | 8°C (46°F) | -- |
| 2014 | 18°C (64°F) | 6°C (43°F) | 0.02" |
| 2013 | 24°C (76°F) | 8°C (46°F) | 0" |
| 2012 | 11°C (51°F) | 6°C (43°F) | 0.02" |
| 2011 | 20°C (68°F) | 4°C (40°F) | 0" |
| 2010 | 19°C (67°F) | 9°C (48°F) | 0.07" |
| 2009 | 22°C (71°F) | 10°C (50°F) | 0" |
| 2008 | 12°C (54°F) | -2°C (29°F) | 0" |
| 2007 | 14°C (58°F) | 3°C (37°F) | 0" |
| 2006 | 24°C (75°F) | 7°C (45°F) | 0" |
| 2005 | 12°C (54°F) | 4°C (40°F) | 0.06" |
| 2004 | 24°C (76°F) | 15°C (59°F) | 0.06" |
| 2003 | 12°C (53°F) | 6°C (43°F) | 2.63" |
| 2002 | 12°C (54°F) | 4°C (39°F) | 0.04" |
| 2001 | 29°C (84°F) | 7°C (45°F) | 0" |
| 2000 | 14°C (57°F) | 6°C (43°F) | 0" |
| 1999 | 24°C (76°F) | 4°C (40°F) | 0" |
| 1998 | 26°C (78°F) | 5°C (41°F) | 0.32" |
| 1997 | 20°C (68°F) | 11°C (51°F) | 0" |
| 1996 | 16°C (61°F) | 4°C (39°F) | 0.38" |
| 1995 | 17°C (62°F) | 6°C (43°F) | 0.02" |
| 1994 | 7°C (44°F) | 4°C (40°F) | 0.06" |
| 1993 | 18°C (65°F) | 8°C (46°F) | 0" |
| 1992 | 11°C (52°F) | 1°C (33°F) | 0.96" |
| 1991 | 19°C (67°F) | 8°C (47°F) | 1.24" |
| 1990 | 23°C (73°F) | 12°C (53°F) | 0" |
| 1989 | 18°C (65°F) | 8°C (46°F) | 0.7" |
| 1988 | 12°C (53°F) | 4°C (39°F) | 0.02" |
| 1987 | 11°C (52°F) | 3°C (38°F) | 0" |
| 1986 | 19°C (67°F) | 11°C (52°F) | 0.68" |
| 1985 | 16°C (60°F) | 6°C (42°F) | 0" |
| 1984 | 10°C (50°F) | 3°C (37°F) | 0.03" |
| 1983 | 17°C (63°F) | 10°C (50°F) | 1.08" |
| 1982 | 21°C (70°F) | 7°C (44°F) | 0" |
| 1981 | 13°C (55°F) | 3°C (37°F) | 0" |
| 1980 | 22°C (72°F) | 8°C (46°F) | 0" |
| 1979 | 9°C (49°F) | 4°C (39°F) | 0.3" |
| 1978 | 3°C (37°F) | -3°C (27°F) | 0" |
| 1977 | 22°C (72°F) | 5°C (41°F) | 1.08" |
| 1976 | 17°C (62°F) | 4°C (40°F) | 0.69" |
| 1975 | 18°C (64°F) | 6°C (42°F) | 0.03" |
| 1974 | 11°C (52°F) | 5°C (41°F) | 0" |
| 1973 | 13°C (56°F) | 4°C (39°F) | 1.12" |
| 1972 | 20°C (68°F) | 10°C (50°F) | 0.18" |
| 1971 | 14°C (57°F) | 4°C (40°F) | 0" |