Perth (NB) Temperature by Month

Perth in New Brunswick, Canada sees significant seasonal temperature differences, with daytime highs between -6°C (21°F) in January and 25°C (77°F) in July, averaging 11°C (52°F) annually. Explore the full monthly breakdown below.

Visitors to Perth will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 13°C (55°F) in July to -17°C (1°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Perth by month:

Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM.

The chart below shows the average temperature throughout the year:

Perth's average annual maximum temperature is 11°C (52°F). To put that in context, here's how it compares to a few well-known destinations:

Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.

Reykjavík, Iceland averages 9°C (48°F) a year, mild summers by Icelandic standards, but cold winters and frequent wind.

Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters, and seasons reversed compared to Europe.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Perth this rarely lasts long on the ground.

For more on Perth's weather, including monthly rainfall, sunshine hours, and humidity, visit our Perth climate page.