St. John's Temperatures: Averages by Month
The numbers here tell you how hot and cold the weather usually is in St. John's, Newfoundland during each month of the year.
The average high and low temperatures are listed below monthly and annually for the city, in both degrees Fahrenheit and Celsius.
Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.
To find out how often it rises over 10 or 20 °C each month in St. John's, scroll down farther. There are also monthly and yearly counts of days with frost and cold weather.
All the numbers are long-term historical averages based on climate data gathered from 1981 to 2010.
|High °F||Low °F||High °C||Low °C|
Days of Hot Weather in St. John's
A hot day at St John's means highs in the twenties Celsius. About half of the summer days here get that warm. The thermometer can nudge above 30 °C (86 °F), but that doesn't happen often, only once or twice a decade.
When St. John's Has Frosty Weather
St. John's typically has 167 days a year when the minimum temperature is at 0 °C or below. The average date for the last frost in spring is May 30. Frost normally returns here on October 17. The frost-free period extends for 139 days on average between the final spring frost and the first fall frost.
How Often St. John's Has Cold Temperatures
St. John's's chilliest winter nights usually have lows between -10 and -20 °C (14 and -4 °F). Temperatures below -20 °C do happen, but not every year. Lows of less than -30 °C (-22 °F) are not normal here.
From November to May, it can remain below freezing here all day long. St. John's typically has 66 days a year when the temperature never rises above 0 °C.
Environment Canada. Meteorological Service of Canada. Canadian Climate Normals. 1981-2010 Climate Normals & Averages.
- Saint John's Temperatures in Recent Years
- St. John's Snowfall Totals & Accumulation Averages
- Average Temperatures Throughout Newfoundland & Labrador
- Precipitation Averages for Places in Newfoundland & Labrador
- Days of Sunshine a Year in Newfoundland & Labrador
- Newfoundland & Labrador Snowfall Averages