Weather in Saint John in August

General weather information about Saint John

Average annual temperature is 7.8 °C

Absolute maximum temperature: 28.2 °C

Absolute minimum temperature: -28.1 °C

Number of sunny days: 165 days

Number of rainy days: 173 days

Number of snow days: 27 days

Look at detailed online map of Saint John

* Weather data for Saint John Canada is based on climate observations for 2026 year

Saint John air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)8.610.07.017.024.823.428.227.627.025.513.414.5
Average daytime temperature (°C)2.3-0.53.710.314.917.323.522.421.015.85.63.8
Average temperature (°C)-1.2-5.1-0.15.810.113.819.618.316.712.11.90.2
Average night temperature (°C)-4.4-9.7-3.41.96.111.016.915.113.79.1-1.5-3.2
Absolute minimum temperature (°C)-11.7-28.1-10.0-4.72.06.214.810.97.10.8-7.7-12.0

Saint John monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.210.411.913.514.915.615.314.112.511.09.58.8
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.09.08.0
Sunshine mean duration (h)3.96.26.28.610.06.27.18.77.36.35.44.4
Precipitation (mm)234477457932661951389713377125
Sunny days7141016189101121131818
Rainy days176131413212120918129
Snow days788000000004

Saint John - weather forecast by months

Saint John weather in januarySaint John weather in februarySaint John weather in marchSaint John weather in aprilSaint John weather in maySaint John weather in juneSaint John weather in julySaint John weather in augustSaint John weather in septemberSaint John weather in octoberSaint John weather in novemberSaint John weather in december

Best time to visit Saint John:

The best time to visit Saint John during the most sunny months:

  • April — 8.6(h)
  • May — 10.0(h)
  • August — 8.7(h)

Months with the longest average daylight duration in Saint John:

  • June — 15.6(h)
  • July — 15.3(h)

The largest precipitation sum in Saint John is at

  • January — 234(mm)
  • June — 266(mm)
  • July — 195(mm)

    • Weather forecast in the closest to Saint John admin centers

    Weather forecast in the closest towns to Saint John

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    Frequently asked questions

    When is the best time to visit Saint John?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Saint John.
    What is the weather like in Saint John?
    See average temperature, rainfall and daylight hours for Saint John by month in the table above.
    How many sunny days does Saint John have?
    The monthly weather statistics above show sunshine and rainfall patterns for Saint John throughout the year.