St Ephrem is a weather station located 312 m above sea level, 9 km from Adstock. Its records go back to 1930: 67 years of temperature are available up to 2015, along with rainfall and a comparison with two reference normals. Closed series: the records of this station end in 2015. Over 1991–2020 the annual mean temperature there is 4.4 °C, clearly higher than over 1961–1990 (3.6 °C): a difference of 0.8 °C. The warmest year of the series is 2010 (6.1 °C) and the coldest 1962 (1.6 °C). The last complete year, 2015, ranks 20 out of 67, from warmest to coldest. Over 1961–2015, the annual mean temperature changes by +0.31 °C per decade. The station ranks 57 out of 240 stations, from the fastest rise to the slowest.
Annual mean temperature since 1930
The first ten years of the series (1930–1957) average 4.0 °C; the last ten (2005–2015) average 4.8 °C, a difference of +0.8 °C. Of the ten warmest years in the series, 4 fall after 1999. The warmest is 2010 (6.1 °C). The ten-year running mean peaks at 4.8 °C (2014) and bottoms out at 3.2 °C (1971).
Annual rainfall since 1930
On average 1367 mm of rain falls per year over the 61 documented years. The wettest year, 1976, received 1779 mm; the driest, 1948, only 899 mm, which is 2.0 times less. The 1991–2020 normal (1451 mm per year) is 74 mm (5.4 %) above the 1961–1990 one (1377 mm). Over 1991–2020, July is on average the wettest month (146 mm) and November the driest (100 mm). Between 1993 and 2015, 14 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 | −12.5 °C | −11.9 °C | +0.6 °C | 108 mm | 116 mm | +8 mm |
| February | −11.2 °C | −10.2 °C | +1.0 °C | 91 mm | 112 mm | +21 mm |
| March | −4.8 °C | −4.3 °C | +0.5 °C | 104 mm | 112 mm | +8 mm |
| April | 2.8 °C | 3.3 °C | +0.5 °C | 92 mm | 104 mm | +12 mm |
| May | 10.3 °C | 11.0 °C | +0.7 °C | 106 mm | 117 mm | +11 mm |
| June | 15.5 °C | 16.2 °C | +0.7 °C | 118 mm | 137 mm | +19 mm |
| July | 18.1 °C | 18.7 °C | +0.6 °C | 122 mm | 146 mm | +24 mm |
| August | 16.8 °C | 17.8 °C | +1.0 °C | 159 mm | 128 mm | −31 mm |
| September | 11.9 °C | 13.3 °C | +1.4 °C | 123 mm | 114 mm | −9 mm |
| October | 6.0 °C | 6.5 °C | +0.5 °C | 102 mm | 126 mm | +24 mm |
| November | −1.0 °C | −0.2 °C | +0.8 °C | 118 mm | 100 mm | −18 mm |
| December | −9.2 °C | −7.3 °C | +1.9 °C | 134 mm | 139 mm | +5 mm |
The largest temperature change is in December (+1.9 °C) and the smallest in March (+0.5 °C); over the year the mean difference is +0.8 °C, and 12 months out of twelve are warmer than before. For rainfall, the largest difference is in July (+24 mm) and the smallest in August (−31 mm).
Records at St Ephrem
- Warmest year: 6.1 °C, in 2010
- Coldest year: 1.6 °C, in 1962
- Driest year: 899 mm, in 1948
- Wettest year: 1779 mm, in 1976
- Warmest month: 21.4 °C, in July 1947
- Coldest month: −18.4 °C, in January 1994
- Wettest month: 310 mm, in June 1922
- Hottest day: 35.6 °C, on 7 September 1934
- Coldest day: −41.7 °C, on 15 February 1943
- Heaviest rain in one day: 120.0 mm, on 30 June 2002
4.5 °C separate the warmest year of the series from the coldest. Between the hottest and the coldest day on record, the range reaches 77.3 °C.
Temperature trend over 1961–2015
The regression line of annual mean temperature changes by +0.31 °C per decade between 1961 and 2015, about +1.7 °C over the whole period. That is faster than the median of the 240 stations (+0.25 °C per decade), by 0.06 °C per decade: the station ranks 57 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 St Ephrem 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 St Ephrem?
Over 1991–2020, the annual mean temperature at St Ephrem is 4.4 °C. It was 3.6 °C over 1961–1990, a difference of +0.8 °C.
What is the warmest year ever measured at St Ephrem?
Since records began in 1930, the warmest year at St Ephrem is 2010, at 6.1 °C on average. The coldest is 1962 (1.6 °C).
Is the climate at St Ephrem getting warmer?
Yes: at St Ephrem, the annual mean temperature rises by 0.31 °C per decade between 1961 and 2015, +1.7 °C in total. 4 of the 10 warmest years in the series fall after 1999.
Towns near this station
Neighbouring stations