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St. John's Weather in August
August in St. John's sees daytime temperatures around 20°C (68°F) and lows of 13°C (55°F) at night. With around 86 mm (3.4 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in St. John's in August
Looking at the last 30 years, the data shows about 14 days with rain, averaging 86 mm (3.4 in) for the month. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in St. John's in August
August tends to be one of the excellent months in St. John's, with 20°C (68°F) in the afternoon and 13°C (55°F) overnight. August marks the summer season. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 13°C (55°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep. On average, it has the peak temperatures of the year.
Sunshine in St. John's in August
With approximately 206 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.If you're a fan of comfortable temperatures and drier conditions, August is a great time to visit.
St. John's Temperature in August
Min Temperature
13°C (55°F)
Max Temperature
20°C (68°F)
Chance of Rain
46%
Precipitation
86 mm (3.4 in)
Rainy days
14 days
Sunshine
206 hours
Percentage Sunshine
46%
St. John's Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in St. John's - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in St. John's typically stay consistent throughout August, with daily highs averaging around 20°C (68°F). Nights are cool, with lows typically ranging from 11°C (52°F) to 13°C (55°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather records for St. John's in August
Browse day-by-day weather records for St. John's spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
St. John's historical weather extremes in August
The extremes listed below come from historical weather data collected in St. John's from 1976 through 2026.
- St. John's recorded its highest August temperature of 30°C (86°F) on August 7, 1996.
- The coldest August day was on August 7, 2011, with a maximum of 10°C (50°F).
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 St. John's 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. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
What To Do in St. John's in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Barbeque8/10 -
Camping8/10 -
Outdoor sports9/10
St. John's 3-Day Forecast
More climate data for St. John's
See the full St. John's climate overview or explore weather in Canada.
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