Longueuil, Quebec, Canada climate
Average temperatures, precipitation and all-time records for Longueuil, Quebec, Canada, with every day graded against ~45 years of local climate history (1981–2026). Its warmest month is July, averaging a high of 26°C, and its coldest is January, with an average low of -18°C.
Longueuil is a city in the province of Quebec, Canada. It is the seat of the Montérégie administrative region and the central city of the urban agglomeration of Longueuil. It sits on the south shore of the Saint Lawrence River directly across from Montreal. via Wikipedia
How today compares
Latest recorded day: 2026-07-21. Each reading placed on Longueuil, Quebec, Canada's own ±7-day seasonal distribution.
Longueuil average temperatures by month
Typical daily high and low, and average precipitation, for each month in Longueuil, Quebec, Canada, based on 1981–2026 records. The wettest month is January (3 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | -7°C | -18°C | 3 mm |
| February | -5°C | -16°C | 3 mm |
| March | 1°C | -8°C | 3 mm |
| April | 10°C | 0°C | 3 mm |
| May | 18°C | 7°C | 3 mm |
| June | 23°C | 13°C | 3 mm |
| July | 26°C | 16°C | 3 mm |
| August | 26°C | 16°C | 3 mm |
| September | 22°C | 11°C | 3 mm |
| October | 14°C | 4°C | 3 mm |
| November | 5°C | -2°C | 3 mm |
| December | -3°C | -12°C | 3 mm |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -23°C to 46°C scale, so the whole year's rhythm reads at a glance.
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Record extremes
- Hottest day on record: 37°C on 2020-07-10
- Coldest day on record: -45°C on 1981-01-04
Percentiles compare each day to Longueuil, Quebec, Canada's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →