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Weather in August
Temperature
Saint Petersburg's average high-temperature in August is an agreeable 20.8°C (69.4°F), indicating a subtle variation from July. In the month of August, the temperature in Saint Petersburg generally rests at an average low of 13.4°C (56.1°F).Humidity
In August, the average relative humidity in Saint Petersburg, Russia, is 76%.Rainfall
The month with the most rainfall in Saint Petersburg is August, when the rain falls for 17 days and typically aggregates up to 83mm (3.27") of precipitation.Snowfall
May through September are months without snowfall.Sea temperature
In August, the average sea temperature in Saint Petersburg is 18°C (64.4°F).Note: In water with a temperature of 18°C (64.4°F), swimming is not a joy for most people. The challenge of controlling breathing increases as the temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
In August, the average length of the day in Saint Petersburg is 15h and 34min.On the first day of the month, sunrise is at 04:41 and sunset at 21:28. On the last day of August, sunrise is at 05:52 and sunset at 20:04 MSK.
Sunshine
In August, the average sunshine is 6.9h.UV index
The average daily maximum UV index in August in Saint Petersburg is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 4 during August leads to these advisories:
Make use of precautions - Suggestions to resist sunburn are communicated. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
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Average temperature in August
Saint Petersburg, Russia
- Average high temperature in August: 20.8°C
The warmest month (with the highest average high temperature) is July (23°C).
The months with the lowest average high temperature are January and February (-3°C).
- Average low temperature in August: 13.4°C
The month with the highest average low temperature is July (15°C).
The coldest month (with the lowest average low temperature) is February (-8.5°C).
Average humidity in August
Saint Petersburg, Russia
- Average humidity in August: 76%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is May (65%).
Average rainfall in August
Saint Petersburg, Russia
- Average rainfall in August: 83mm
The wettest month (with the highest rainfall) is August (83mm).
The driest month (with the least rainfall) is April (31mm).
Average rainfall days in August
Saint Petersburg, Russia
- Average rainfall days in August: 17 days
The months with the highest number of rainy days are September and October (20 days).
The month with the least rainy days is February (7 days).
Average snowfall days in August
Saint Petersburg, Russia
- Average snowfall days in August: 0 days
The months with the highest number of snowfall days are January, February and December (17 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in August
Saint Petersburg, Russia
- Average sea temperature in August: 18°C
The best month for swimming (with the highest average sea temperature) is July (19°C).
The coldest month (with the lowest average sea temperature) is February (-0.3°C).
Average daylight in August /
Average sunshine in August
Saint Petersburg, Russia
- Average daylight in August: 15h and 4min
The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 6min).
- Average sunshine in August: 6h and 5min
The month with the most sunshine is June (Average sunshine: 9h and 12min).
The month with the least sunshine is December (Average sunshine: 0h and 24min).
Average UV index in August
Saint Petersburg, Russia
- Average UV index in August: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, November and December (UV index 0).
Saint Petersburg, Russia
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