New Westminster is a weather station located 5 m above sea level, 2 km from Pitt Meadows. Its records go back to 1875: 116 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 10.6 °C; the 1961–1990 period is not documented well enough to compare. The warmest year of the series is 2015 (12.0 °C) and the coldest 1880 (7.4 °C). The last complete year, 2020, ranks 11 out of 116, from warmest to coldest. Over 1961–2020, the annual mean temperature changes by +0.13 °C per decade. The station ranks 225 out of 240 stations, from the fastest rise to the slowest.
Annual mean temperature since 1875
The first ten years of the series (1875–1898) average 9.2 °C; the last ten (2011–2020) average 10.8 °C, a difference of +1.7 °C. Of the ten warmest years in the series, 4 fall after 1999. The warmest is 2015 (12.0 °C). The ten-year running mean peaks at 10.8 °C (1942) and bottoms out at 9.2 °C (1917).
Annual rainfall since 1875
On average 1877 mm of rain falls per year over the 62 documented years. The wettest year, 1997, received 2496 mm; the driest, 1929, only 1082 mm, which is 2.3 times less. Between 1972 and 2005, 9 years out of 20 exceeded the series average.
Records at New Westminster
- Warmest year: 12.0 °C, in 2015
- Coldest year: 7.4 °C, in 1880
- Driest year: 1082 mm, in 1929
- Wettest year: 2496 mm, in 1997
- Warmest month: 21.3 °C, in July 1958
- Coldest month: −5.9 °C, in January 1950
- Wettest month: 645 mm, in January 1935
4.6 °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 +0.13 °C per decade between 1961 and 2020, about +0.8 °C over the whole period. That is slower than the median of the 240 stations (+0.25 °C per decade), by 0.12 °C per decade: the station ranks 225 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 New Westminster 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 New Westminster?
Over 1991–2020, the annual mean temperature at New Westminster is 10.6 °C.
What is the warmest year ever measured at New Westminster?
Since records began in 1875, the warmest year at New Westminster is 2015, at 12.0 °C on average. The coldest is 1880 (7.4 °C).
Is the climate at New Westminster getting warmer?
Yes: at New Westminster, the annual mean temperature rises by 0.13 °C per decade between 1961 and 2020, +0.8 °C in total. 4 of the 10 warmest years in the series fall after 1999.
Towns near this station
Neighbouring stations