Les Cedres is a weather station located 47 m above sea level, 9 km from Salaberry-de-Valleyfield. Its records go back to 1914: 94 years of temperature are available up to 2019, along with rainfall and a comparison with two reference normals. Closed series: the records of this station end in 2019. Over 1991–2020 the annual mean temperature there is 6.7 °C, clearly higher than over 1961–1990 (5.9 °C): a difference of 0.9 °C. The warmest year of the series is 2012 (8.1 °C) and the coldest 1917 (3.0 °C). The last complete year, 2019, ranks 70 out of 94, from warmest to coldest. Over 1961–2019, the annual mean temperature changes by +0.21 °C per decade. The station ranks 162 out of 240 stations, from the fastest rise to the slowest.
Annual mean temperature since 1914
The first ten years of the series (1914–1925) average 5.1 °C; the last ten (2006–2019) average 6.8 °C, a difference of +1.8 °C. Of the ten warmest years in the series, 5 fall after 1999. The warmest is 2012 (8.1 °C). The ten-year running mean peaks at 6.7 °C (2012) and bottoms out at 5.0 °C (1923).
Annual rainfall since 1914
On average 1039 mm of rain falls per year over the 80 documented years. The wettest year, 1945, received 1378 mm; the driest, 1914, only 579 mm, which is 2.4 times less. The 1991–2020 normal (1068 mm per year) is 49 mm (4.8 %) above the 1961–1990 one (1019 mm). Over 1991–2020, July is on average the wettest month (109 mm) and February the driest (64 mm). Between 1985 and 2011, 11 years out of 20 exceeded the series average.
Monthly normals: 1961–1990 against 1991–2020
The table compares, month by month, the mean temperature and the rainfall total of two thirty-year reference periods. The difference column shows what the recent period changes compared with the earlier one.
| Month | Temp. 1961–1990 | Temp. 1991–2020 | Difference | Rain 1961–1990 | Rain 1991–2020 | Difference |
|---|---|---|---|---|---|---|
| January | −10.8 °C | −9.8 °C | +1.0 °C | 79 mm | 74 mm | −5 mm |
| February | −9.6 °C | −8.3 °C | +1.3 °C | 69 mm | 64 mm | −5 mm |
| March | −3.1 °C | −2.5 °C | +0.6 °C | 73 mm | 64 mm | −9 mm |
| April | 5.3 °C | 6.0 °C | +0.7 °C | 76 mm | 88 mm | +12 mm |
| May | 12.5 °C | 13.7 °C | +1.2 °C | 75 mm | 91 mm | +16 mm |
| June | 17.7 °C | 18.6 °C | +0.9 °C | 85 mm | 101 mm | +16 mm |
| July | 20.8 °C | 21.2 °C | +0.4 °C | 92 mm | 109 mm | +17 mm |
| August | 19.6 °C | 20.2 °C | +0.6 °C | 104 mm | 101 mm | −3 mm |
| September | 14.9 °C | 15.7 °C | +0.8 °C | 88 mm | 99 mm | +11 mm |
| October | 8.5 °C | 8.8 °C | +0.3 °C | 81 mm | 106 mm | +25 mm |
| November | 1.7 °C | 2.1 °C | +0.4 °C | 100 mm | 81 mm | −19 mm |
| December | −7.1 °C | −4.9 °C | +2.2 °C | 97 mm | 90 mm | −7 mm |
The largest temperature change is in December (+2.2 °C) and the smallest in October (+0.3 °C); over the year the mean difference is +0.9 °C, and 12 months out of twelve are warmer than before. For rainfall, the largest difference is in October (+25 mm) and the smallest in November (−19 mm).
Records at Les Cedres
- Warmest year: 8.1 °C, in 2012
- Coldest year: 3.0 °C, in 1917
- Driest year: 579 mm, in 1914
- Wettest year: 1378 mm, in 1945
- Warmest month: 23.8 °C, in July 1921
- Coldest month: −18.3 °C, in February 1934
- Wettest month: 245 mm, in November 1927
- Hottest day: 36.5 °C, on 8 August 2001
- Coldest day: −35.6 °C, on 15 January 1957
- Heaviest rain in one day: 95.6 mm, on 31 August 2005
5.1 °C separate the warmest year of the series from the coldest. Between the hottest and the coldest day on record, the range reaches 72.1 °C.
Temperature trend over 1961–2019
The regression line of annual mean temperature changes by +0.21 °C per decade between 1961 and 2019, about +1.2 °C over the whole period. That is slower than the median of the 240 stations (+0.25 °C per decade), by 0.04 °C per decade: the station ranks 162 out of 240.
Data source and licence
Data source: Environment and Climate Change Canada (dataset “AHCCD (ahccd-monthly) + climate-daily”), licence Open Government Licence – Canada. Last updated: 29 October 2026.
The data for Les Cedres are shown as the source publishes them; this site does not correct them. A year is kept only if at least eleven months of measurements are available, and a normal is computed only with at least twenty years of data out of its thirty. Temperatures are rounded to 0.1 °C and rainfall to the millimetre. The station is one of 240 stations in Canada: the overview page lets you compare them.
Frequently asked questions
What is the annual mean temperature at Les Cedres?
Over 1991–2020, the annual mean temperature at Les Cedres is 6.7 °C. It was 5.9 °C over 1961–1990, a difference of +0.9 °C.
What is the warmest year ever measured at Les Cedres?
Since records began in 1914, the warmest year at Les Cedres is 2012, at 8.1 °C on average. The coldest is 1917 (3.0 °C).
Is the climate at Les Cedres getting warmer?
Yes: at Les Cedres, the annual mean temperature rises by 0.21 °C per decade between 1961 and 2019, +1.2 °C in total. 5 of the 10 warmest years in the series fall after 1999.
Towns near this station
Neighbouring stations