CanadaAverage weather for St. John's in August
It's pleasantly warm in August in St. John's with an average temperature of 21°C. Temperatures this month range from a low of 19°C to a high of 24°C. At night, you can expect temperatures between 11°C and 15°C.
Start of August
The month of August starts in St. John's with warm temps, averaging around 23°C during the day and nights around 14°C. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
Mid August
By mid-August, daytime temps drop to around 21°C, with nights around 14°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of August
By the end of August, the average daytime temperature in St. John's is around 21°C, while nighttime temps are about 13°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
Water temperature
The water temperature at St. John's is 17°C this month. You can swim, but it's a bit chilly.
In August, there is an average of 113 mm of precipitation, spread over 11 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
St. John's in August |
New York | ||
|---|---|---|---|
 Average temperature |
21°C | 30°C | |
 Max. temperature |
24°C | 31°C | |
| Min. temperature |
19°C | -5°C | |
 Total precipitation |
113 mm | 79 mm | |
| Rainy days |
11 days | 13 days | |
July
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is August a good time to visit St. John's?
Looking for sun? August isn’t a good month to be in St. John's. The temperature is nice, but there’s too much chance of rain.
Temperature records
With 30°C in 2022, St. John's reached the highest temperature in August over the past 10 years. The lowest daytime temperature in this month was 11°C in 2015. The extreme nighttime temperatures ranged from a lowest recorded value of 5°C to a highest value of 21°C.
Check out the climate of St. John's for all months and discover the best travel time
Curious about the weather in other parts of Canada? Check out the climate and weather for spots like Vancouver, Toronto, Niagara Falls, or explore other destinations in Canada.
Daily Temperature in August in St. John's
This chart shows the average daily high and low temperatures in August for St. John's, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in August in St. John's
The chart below shows the average daily precipitation in August for St. John's, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for August, you can expect about 11 days of precipitation in St. John's.
Daily UV index in August in St. John's
This chart shows the average daily UV index in August in St. John's, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in August in St. John's over the years
This chart shows the average temperature in August in St. John's, measured in degrees Celsius, over the past few years.
Total precipitation in August in St. John's over the years
This chart shows the average precipitation in August in St. John's, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in August for St. John's
Click on any day in August to get detailed info about the usual weather on that day in St. John's. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in St. John's
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Average weather in St. John's by month
Click on a month below to see detailed weather info for St. John's. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of St. John's for all months at once
