St. John's (NL) Temperature by Month
St. John's in Newfoundland and Labrador, Canada sees significant seasonal temperature differences, with daytime highs between 1°C (34°F) in February and 20°C (68°F) in August, averaging 9°C (48°F) annually. Explore the full monthly breakdown below.
St. John's Monthly Temperatures
Depending on the time of the year, temperatures range from pleasant to very cold in St. John's. Nighttime lows follow the same pattern, ranging from 13°C (55°F) to -7°C (19°F).
The chart below illustrates the average maximum day and minimum night temperatures in St. John's by month:
The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. August, the city's warmest month, averages 206 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
50-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in July
Historical St. John's Temperatures: 1976-2026
Browse day-by-day temperature records for St. John's spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: St. John's vs Canada
The map below shows the annual temperature across Canada. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
St. John's vs World: Temperature Compared
St. John's's average annual maximum temperature is 9°C (48°F). To put that in context, here's how it compares to a few well-known destinations:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
Queenstown, New Zealand averages 10°C (50°F) annually — remember seasons are flipped, so its coldest months fall in June and July.
New York City, USA averages 17°C (63°F) a year, with hot humid summers and cold winters that bring regular snowfall.
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.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on St. John's's weather — including monthly rainfall, sunshine hours, and humidity — visit our St. John's climate page.
