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Weather in St. John's for August 2025

Your guide to St. John's weather in August - trends and predictions
  • In general, the average temperature in St. John's at the beginning of August is 18.7 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 18.9 °C by the end of August.

  • Expect significant rainfall in St. John's during August, with an average of 17 rainy days.

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Average dry days
14
Dry days
Average rainy days
17
Rainy days
Average snowy days
0
Snow days
Average temperatures
17°/13°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
87 %
Avg humidity

St. John's in August average weather

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Temperatures trend during August in St. John's

See the weather trend as well as the moving average line

August weather day by day

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Date Weather Temperatures Rain UV More
1 Aug. Overcast
Overcast
20° /15° 0 mm 5
2 Aug. Overcast
Overcast
19° /12° 2.9 mm 5
3 Aug. Overcast
Overcast
20° /12° 0 mm 6
4 Aug. Cloudy
Cloudy
20° /13° 0.2 mm 5
5 Aug. Overcast
Overcast
19° /14° 0.1 mm 5
6 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
17° /13° 10.2 mm 4
7 Aug. Patchy rain possible
Patchy rain possible
16° /12° 0.3 mm 4
8 Aug. Patchy rain possible
Patchy rain possible
16° /12° 0.3 mm 4
9 Aug. Patchy rain possible
Patchy rain possible
16° /11° 0.2 mm 4
10 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
18° /13° 7.2 mm 4
11 Aug. Patchy rain possible
Patchy rain possible
20° /15° 4.3 mm 5
12 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
22° /16° 6 mm 5
13 Aug. Overcast
Overcast
19° /13° 3.6 mm 4
14 Aug. Patchy rain possible
Patchy rain possible
16° /12° 4 mm 4
15 Aug. Overcast
Overcast
17° /11° 0.9 mm 5
16 Aug. Patchy rain possible
Patchy rain possible
18° /12° 0.3 mm 5
17 Aug. Overcast
Overcast
18° /12° 0 mm 5
18 Aug. Partly cloudy
Partly cloudy
19° /13° 0 mm 6
19 Aug. Moderate rain at times
Moderate rain at times
17° /14° 9.3 mm 4
20 Aug. Moderate rain at times
Moderate rain at times
22° /15° 5 mm 5
21 Aug. Patchy rain possible
Patchy rain possible
20° /14° 4.9 mm 5
22 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
17° /13° 15 mm 4
23 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
16° /11° 12.8 mm 4
24 Aug. Overcast
Overcast
17° /13° 0.6 mm 4
25 Aug. Sunny
Sunny
19° /12° 0 mm 6
26 Aug. Overcast
Overcast
20° /13° 0 mm 5
27 Aug. Partly cloudy
Partly cloudy
17° /13° 5.9 mm 5
28 Aug. Light rain shower
Light rain shower
19° /14° 3 mm 5
29 Aug. Sunny
Sunny
18° /12° 3.5 mm 5
30 Aug. Moderate rain
Moderate rain
19° /11° 13.6 mm 5
31 Aug. Heavy rain
Heavy rain
20° /14° 83.2 mm 6
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Important Notice
Our weather forecast for St. John's in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the St. John's forecast closer to your planned date for the most up-to-date weather information.

St. John's in August - FAQ

What are the expected maximum and minimum temperatures in St. John's during August?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in St. John's during August?
Significant rainfall exceeding 312.2 mm is expected in St. John's during August, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in St. John's during August?
The average wind speed in St. John's during August is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in St. John's

Explore the daily rainfall trends and prepare for St. John'ss August weather 💧

UV exposure in St. John's during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️

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Location coordinates Where is St. John's?

Get accurate weather forecasts for St. John's, located at latitude 47.565 and longitude -52.709. Stay updated with localized weather information tailored for St. John's.

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