August weather forecastSt. John's, Canada
August
Weather in August
Even with slightly receding temperatures, August in St. John's relishes the traits of summer weather. A shift can be noticed in temperatures, with the high moving slightly down to 20.5°C (68.9°F) and the low to 11.6°C (52.9°F). Amid celebrations, warmer seawater invites citizens for a swim. While days become slightly shorter, this does not dampen outdoor activities. The city dons a festive look under the bright sunshine.Temperature
St. John's's shift from July to August is accompanied by an average high-temperature of a still pleasant 20.5°C (68.9°F), a slight deviation from 20.7°C (69.3°F). St. John's's average low-temperature for the month of August records at a fresh 11.6°C (52.9°F).Rainfall
In St. John's, in August, during 13.7 rainfall days, 100mm (3.94") of precipitation is typically accumulated. Throughout the year, in St. John's, Canada, there are 162.7 rainfall days, and 1207mm (47.52") of precipitation is accumulated.Snowfall
July through September are months without snowfall in St. John's.Sea temperature
The month with the warmest seawater in St. John's, Canada, is August, with an average sea temperature of 13.9°C (57°F).Note: Engaging in a swim in 13.9°C (57°F) can threaten life. Brief exposure to 13°C (55.4°F) waters is uneasy, and submersion below 10°C (50°F) can lead to cold shock and disrupted breathing patterns, varying by individual.
Daylight
In St. John's, the average length of the day in August is 14h and 13min.On the first day of the month, sunrise is at 5:39 am and sunset at 8:34 pm. On the last day of August, in St. John's, sunrise is at 6:19 am and sunset at 7:42 pm NDT.
Sunshine
The average sunshine in August in St. John's is 6.7h.UV index
In August, the average daily maximum UV index in St. John's is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In August, the maximum UV index of 6 transforms into these recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
St. John's, Canada
- Average high temperature in August: 20.5°C
The warmest month (with the highest average high temperature) is July (20.7°C).
The month with the lowest average high temperature is February (-1.1°C).
- Average low temperature in August: 11.6°C
The month with the highest average low temperature is August (11.6°C).
The coldest month (with the lowest average low temperature) is February (-8.6°C).
Average rainfall in August
St. John's, Canada
- Average rainfall in August: 100mm
The wettest month (with the highest rainfall) is October (153.7mm).
The driest month (with the least rainfall) is February (61.6mm).
Average rainfall days in August
St. John's, Canada
- Average rainfall days in August: 13.7 days
The month with the highest number of rainy days is October (18.1 days).
The month with the least rainy days is February (8.6 days).
Average snowfall in August
St. John's, Canada
- Average snowfall in August: 0mm
The month with the highest snowfall is January (887mm).
The months with the least snowfall are July, August and September (0mm).
Average snowfall days in August
St. John's, Canada
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are July, August and September (0 days).
Average sea temperature in August
St. John's, Canada
- Average sea temperature in August: 13.9°C
The best month for swimming (with the highest average sea temperature) is August (13.9°C).
The coldest month (with the lowest average sea temperature) is March (-0.4°C).
Average daylight in August /
Average sunshine in August
St. John's, Canada
- Average daylight in August: 14h and 12min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in August: 6h and 42min
The month with the most sunshine is July (Average sunshine: 7h and 0min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).
Average UV index in August
St. John's, Canada
- Average UV index in August: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, November and December (UV index 1).
