Weather on May 21 in Montreal
Historical weather data for May 21 in Montreal, Canada
Based on 51 years of data from MCTAVISH
About This Date
May 21st in Montreal, Canada typically brings mild spring weather, with average highs around 21°C and lows near 12°C. Over 51 years of records, the warmest May 21st was in 2021 (27°C average), while the coldest was 1990 (8°C) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 31% of May 21st dates historically, with the wettest May 21st recording 3.25" of rain. The last decade has been 8.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 8.3°F warmer on this date compared to 20-30 years ago.
Planning for May 21st in Montreal? 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) | 6°C (43°F) | -- |
| 2025 | 17°C (63°F) | 9°C (48°F) | -- |
| 2023 | 23°C (73°F) | 9°C (49°F) | 1 mm |
| 2022 | 32°C (89°F) | 19°C (66°F) | 1 mm |
| 2021 | 32°C (89°F) | 21°C (70°F) | 0 mm |
| 2020 | 25°C (77°F) | 14°C (58°F) | 0 mm |
| 2019 | 16°C (61°F) | 8°C (46°F) | 0 mm |
| 2018 | 25°C (77°F) | 11°C (52°F) | 0 mm |
| 2017 | 21°C (69°F) | 10°C (50°F) | 2 mm |
| 2016 | 24°C (76°F) | 15°C (59°F) | 0 mm |
| 2015 | 20°C (68°F) | 9°C (49°F) | 0 mm |
| 2014 | 23°C (74°F) | 12°C (54°F) | 0 mm |
| 2013 | 19°C (66°F) | 13°C (55°F) | 10 mm |
| 2012 | 28°C (83°F) | 19°C (67°F) | 0 mm |
| 2011 | 23°C (74°F) | 12°C (53°F) | 0 mm |
| 2010 | 22°C (71°F) | 12°C (53°F) | -- |
| 2009 | 29°C (85°F) | 14°C (57°F) | 3 mm |
| 2008 | 13°C (55°F) | 7°C (45°F) | 4 mm |
| 2007 | 18°C (64°F) | 6°C (43°F) | 0 mm |
| 2006 | 13°C (55°F) | 7°C (45°F) | 23 mm |
| 2005 | 13°C (55°F) | 8°C (47°F) | 0 mm |
| 2004 | 17°C (63°F) | 12°C (53°F) | 0 mm |
| 2003 | 17°C (62°F) | 8°C (47°F) | 8 mm |
| 2002 | 14°C (57°F) | 6°C (42°F) | 0 mm |
| 2001 | 25°C (77°F) | 15°C (59°F) | 0 mm |
| 2000 | 16°C (61°F) | 9°C (49°F) | 0 mm |
| 1999 | 21°C (69°F) | 8°C (47°F) | 0 mm |
| 1998 | 18°C (64°F) | 8°C (46°F) | 0 mm |
| 1997 | 15°C (59°F) | 7°C (45°F) | 3 mm |
| 1992 | 29°C (85°F) | 16°C (61°F) | 0 mm |
| 1991 | 25°C (77°F) | 13°C (56°F) | 0 mm |
| 1990 | 11°C (52°F) | 4°C (39°F) | 0 mm |
| 1989 | 22°C (71°F) | 16°C (61°F) | 9 mm |
| 1988 | 23°C (73°F) | 16°C (60°F) | 3 mm |
| 1987 | 20°C (68°F) | 11°C (52°F) | 0 mm |
| 1986 | 17°C (63°F) | 11°C (51°F) | 4 mm |
| 1985 | 20°C (68°F) | 14°C (57°F) | 0 mm |
| 1984 | 20°C (68°F) | 10°C (50°F) | 0 mm |
| 1983 | 19°C (67°F) | 12°C (54°F) | 0 mm |
| 1982 | 17°C (62°F) | 8°C (46°F) | 0 mm |
| 1981 | 23°C (73°F) | 12°C (54°F) | 3 mm |
| 1980 | 26°C (79°F) | 12°C (54°F) | 0 mm |
| 1979 | 23°C (74°F) | 13°C (56°F) | 83 mm |
| 1978 | 20°C (68°F) | 11°C (52°F) | 0 mm |
| 1977 | 31°C (87°F) | 17°C (63°F) | 0 mm |
| 1976 | 13°C (55°F) | 7°C (44°F) | 15 mm |
| 1975 | 28°C (82°F) | 16°C (61°F) | 0 mm |
| 1974 | 17°C (63°F) | 12°C (53°F) | 0 mm |
| 1973 | 12°C (54°F) | 10°C (50°F) | 16 mm |
| 1972 | 28°C (83°F) | 15°C (59°F) | 0 mm |
| 1971 | 21°C (69°F) | 14°C (57°F) | 0 mm |