Climate & Temperature > Canada > Saint John, New Brunswick

Saint John, New Brunswick Climate Guide to the Average Weather & Temperatures with Graphs Elucidating Sunshine and Rainfall Data & Information about Wind Speeds & Humidity:

  • Saint John, New Brunswick, Canada latitude & longitude; 45°17'N 66°4'W.
  • Altitude; 36 m (118 ft).
  • The average temperature in Saint John, New Brunswick, Canada is 5.8 °C (43 °F).
  • The range of average monthly temperatures is 23.5 °C.
  • The warmest average max/ high temperature is 21 °C (70 °F) in July & August.
  • The coolest average min/ low temperature is -11 °C (12 °F) in January.
  • Saint John, New Brunswick receives on average 1278 mm (50.3 in) of precipitation annually or 107 mm (4.2 in) each month.
  • On balance there are 166 days annually on which greater than 0.1 mm (0.004 in) of precipitation (rain, sleet, snow or hail) occurrs or 14 days on an average month.
  • The month with the driest weather is July when on balance 83 mm (3.3 in) of rain, sleet, hail or snow falls across 13 days.
  • The month with the wettest weather is November when on balance 134 mm (5.3 in) of rain, sleet, hail or snow falls across 15 days.
  • Mean relative humidity for an average year is recorded as 69.6% and on a monthly basis it ranges from 66% in March, April, May to 76% in November.
  • There is an average range of hours of sunshine in Saint John, New Brunswick of between 3.1 hours per day in November and 7.2 hours per day in July.
  • On balance there are 1891 sunshine hours annually and approximately 5.2 sunlight hours for each day.

Saint John, New Brunswick Climate Graph (Metric | Imperial units)

Saint John, New Brunswick Climate Graph

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Saint John, New Brunswick Weather Averages

  Average Minimum Temperatures in Saint John, New Brunswick, Canada (°C) Average Maximum Temperature in Saint John, New Brunswick, Canada (°C) Saint John, New Brunswick Average Temperature (°C) Average Sea Temp (°C) Average Rainfall/ Precipitation (mm) Wet Days (>0.1 mm) Average Sunlight Hours/ Day Relative Humidity (%) Average Wind Speed in Saint John, New Brunswick (Beaufort) Average Number of Days with Frost  
Weather in Saint John, New Brunswick in January -11 -2 -6.5 - 133 15 3.4 73 3 - Average Temperature in Saint John, New Brunswick in January
Weather in Saint John, New Brunswick in February -10 -1 -5.5 - 108 13 4.4 69 3 - Average Temperature in Saint John, New Brunswick in February
Weather in Saint John, New Brunswick in March -6 3 -2 - 102 14 4.9 66.0 3 - Average Temperature in Saint John, New Brunswick in March
Weather in Saint John, New Brunswick in April 0 8 4 - 98 14 5.3 66 3 - Average Temperature in Saint John, New Brunswick in April
Weather in Saint John, New Brunswick in May 5 14 10 - 94 14 6.5 66 3 - Average Temperature in Saint John, New Brunswick in May
Weather in Saint John, New Brunswick in June 9 18 14 - 97 14 6.7 71 3 - Average Temperature in Saint John, New Brunswick in June
Weather in Saint John, New Brunswick in July 12 21 17 - 83 13 7.2 70 3 - Average Temperature in Saint John, New Brunswick in July
Weather in Saint John, New Brunswick in August 13 21 17 - 95 13 7.0 70 3 - Average Temperature in Saint John, New Brunswick in August
Weather in Saint John, New Brunswick in September 10 18 14 - 107 13 5.5 69 3 - Average Temperature in Saint John, New Brunswick in September
Weather in Saint John, New Brunswick in October 5 13 9 - 106 13 4.8 67 3 - Average Temperature in Saint John, New Brunswick in October
Weather in Saint John, New Brunswick in November 0 7 4 - 134 15 3.1 76 3 - Average Temperature in Saint John, New Brunswick in November
Weather in Saint John, New Brunswick in December -8 1 -3.5 - 121 15 3.2 72 3 - Average Temperature in Saint John, New Brunswick in December

Saint John, New Brunswick Climograph/ Climate Chart (imperial)

Saint John, New Brunswick Temperature Chart

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Saint John, New Brunswick Temperatures in Farenheit

  Average Minimum Temperatures in Saint John, New Brunswick, Canada (°F) Average Maximum Temperature in Saint John, New Brunswick, Canada (°F) Average Temperature (°F) Average Sea Temp (°F) Average Rainfall (in) Wet Days (>0.004 in) Average Sunlight Hours/ Day Relative Humidity (%) Average Wind Speed (Beaufort) Average Number of Days with Frost  
Temperatures in Saint John, New Brunswick in January 12 28 20 - 5.2 15 3.4 73 3 - Climate in Saint John, New Brunswick in January
Temperatures in Saint John, New Brunswick in February 14 30 22 - 4.3 13 4.4 69 3 - Climate in Saint John, New Brunswick in February
Temperatures in Saint John, New Brunswick in March 21 37 29 - 4.0 14 4.9 66 3 - Climate in Saint John, New Brunswick in March
Temperatures in Saint John, New Brunswick in April 32 46 39 - 3.9 14 5.3 66 3 - Climate in Saint John, New Brunswick in April
Temperatures in Saint John, New Brunswick in May 41 57 49 - 3.7 14 6.5 66 3 - Climate in Saint John, New Brunswick in May
Temperatures in Saint John, New Brunswick in June 48 64 56 - 3.8 14 6.7 71 3 - Climate in Saint John, New Brunswick in June
Temperatures in Saint John, New Brunswick in July 54 70 62 - 3.3 13 7.2 70 3 - Climate in Saint John, New Brunswick in July
Temperatures in Saint John, New Brunswick in August 55 70 63 - 3.7 13 7.0 70 3 - Climate in Saint John, New Brunswick in August
Temperatures in Saint John, New Brunswick in September 50 64 57 - 4.2 13 5.5 69 3 - Climate in Saint John, New Brunswick in September
Temperatures in Saint John, New Brunswick in October 41 55 48 - 4.2 13 4.8 67 3 - Climate in Saint John, New Brunswick in October
Temperatures in Saint John, New Brunswick in November 32 45 38 - 5.3 15 3.1 76 3 - Climate in Saint John, New Brunswick in November
Temperatures in Saint John, New Brunswick in December 18 34 26 - 4.8 15 3.2 72 3 - Climate in Saint John, New Brunswick in December

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