Saint John
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Saint John Weather in August

August in Saint John brings pleasant temperatures, with highs of 21°C (70°F) and nights dropping to 14°C (57°F). It's also the driest month of the year, ideal for those who want to avoid rain.

Rainfall in Saint John in August

This month sees the least rain of the year, making it well suited for outdoor adventures. Historically, approximately 12 days this month are expected to have rain, averaging 87 mm (3.4 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Saint John in August

The excellent temperature in Saint John in August makes it a solid month to visit, with 21°C (70°F) during the day and 14°C (57°F) at night. August is in the summer season. Even when the weather is stable, mornings and evenings can still feel distinctly cool. At 14°C (57°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping. On average, it has the peak temperatures of the year.

If your ideal day consists of dry skies and pleasant temperatures, July and August typically offer the best circumstances for Saint John.

Saint John Temperature in August

Min Temperature
14°C (57°F)
Max Temperature
21°C (70°F)
Chance of Rain
39%
Precipitation
87 mm (3.4 in)
Rainy days
12 days

Saint John Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Saint John - and find the best time to visit.

Best Places in Canada in August

Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in August →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Saint John in August

Pleasant temperatures in August mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes.

What To Do in Saint John in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Cycling
    9/10
  • Walking
    9/10
  • Camping
    8/10
  • Outdoor sports
    9/10

Saint John 3-Day Forecast

More climate data for Saint John

Popular in August

Where to go in August - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.