Swan River is a weather station located 335 m above sea level, 3 km from Swan River. Its records go back to 1960: 57 years of temperature are available up to 2020, along with rainfall and a comparison with two reference normals. Closed series: the records of this station end in 2020. Over 1991–2020 the annual mean temperature there is 1.6 °C, barely higher than over 1961–1990 (1.4 °C): a difference of 0.2 °C. The warmest year of the series is 1987 (4.5 °C) and the coldest 1964 (−1.1 °C). The last complete year, 2020, ranks 23 out of 57, from warmest to coldest. Over 1961–2020, the annual mean temperature changes by +0.21 °C per decade. The station ranks 167 out of 240 stations, from the fastest rise to the slowest.
Annual mean temperature since 1960
The first ten years of the series (1960–1970) average 0.7 °C; the last ten (2011–2020) average 1.7 °C, a difference of +1.0 °C. Of the ten warmest years in the series, 4 fall after 1999. The warmest is 1987 (4.5 °C). The ten-year running mean peaks at 2.2 °C (1990) and bottoms out at 0.1 °C (1972).
Annual rainfall since 1960
On average 592 mm of rain falls per year over the 51 documented years. The wettest year, 2010, received 974 mm; the driest, 1961, only 309 mm, which is 3.2 times less. The 1991–2020 normal (640 mm per year) is 85 mm (15.3 %) above the 1961–1990 one (555 mm). Over 1991–2020, July is on average the wettest month (104 mm) and February the driest (27 mm). Between 1993 and 2015, 13 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 | −18.9 °C | −16.9 °C | +2.0 °C | 28 mm | 35 mm | +7 mm |
| February | −15.2 °C | −14.6 °C | +0.6 °C | 24 mm | 27 mm | +3 mm |
| March | −8.0 °C | −7.1 °C | +0.9 °C | 43 mm | 29 mm | −14 mm |
| April | 2.5 °C | 2.3 °C | −0.2 °C | 33 mm | 42 mm | +9 mm |
| May | 10.6 °C | 10.0 °C | −0.6 °C | 49 mm | 62 mm | +13 mm |
| June | 16.0 °C | 15.4 °C | −0.6 °C | 75 mm | 103 mm | +28 mm |
| July | 18.5 °C | 18.0 °C | −0.5 °C | 88 mm | 104 mm | +16 mm |
| August | 17.0 °C | 17.0 °C | 0.0 °C | 64 mm | 81 mm | +17 mm |
| September | 10.9 °C | 11.7 °C | +0.8 °C | 58 mm | 49 mm | −9 mm |
| October | 4.8 °C | 3.9 °C | −0.9 °C | 32 mm | 40 mm | +8 mm |
| November | −6.1 °C | −6.2 °C | −0.1 °C | 31 mm | 35 mm | +4 mm |
| December | −15.8 °C | −14.4 °C | +1.4 °C | 30 mm | 33 mm | +3 mm |
The largest temperature change is in January (+2.0 °C) and the smallest in October (−0.9 °C); over the year the mean difference is +0.2 °C, and 5 months out of twelve are warmer than before. For rainfall, the largest difference is in June (+28 mm) and the smallest in March (−14 mm).
Records at Swan River
- Warmest year: 4.5 °C, in 1987
- Coldest year: −1.1 °C, in 1964
- Driest year: 309 mm, in 1961
- Wettest year: 974 mm, in 2010
- Warmest month: 20.9 °C, in July 2012
- Coldest month: −29.5 °C, in January 1966
- Wettest month: 348 mm, in July 1996
5.6 °C separate the warmest year of the series from the coldest. Daily records are not part of the dataset for this station: only annual and monthly extremes are shown.
Temperature trend over 1961–2020
The regression line of annual mean temperature changes by +0.21 °C per decade between 1961 and 2020, 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 167 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 Swan River 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 Swan River?
Over 1991–2020, the annual mean temperature at Swan River is 1.6 °C. It was 1.4 °C over 1961–1990, a difference of +0.2 °C.
What is the warmest year ever measured at Swan River?
Since records began in 1960, the warmest year at Swan River is 1987, at 4.5 °C on average. The coldest is 1964 (−1.1 °C).
Is the climate at Swan River getting warmer?
Yes: at Swan River, the annual mean temperature rises by 0.21 °C per decade between 1961 and 2020, +1.2 °C in total. 4 of the 10 warmest years in the series fall after 1999.
Towns near this station
Neighbouring stations