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Average Weather in August in Saint Petersburg Russia

In Saint Petersburg, the month of August is characterized by falling daily high temperatures, with daily highs decreasing by 8°F, from 72°F to 65°F over the course of the month, and rarely exceeding 82°F or dropping below 56°F.

Daily low temperatures decrease by 6°F, from 55°F to 49°F, rarely falling below 42°F or exceeding 61°F.

For reference, on July 25, the hottest day of the year, temperatures in Saint Petersburg typically range from 55°F to 73°F, while on February 6, the coldest day of the year, they range from 14°F to 25°F.

Average High and Low Temperature in August

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in August

Average Hourly Temperature in August in Saint Petersburg18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM4 AM8 AM12 PM4 PM8 PM12 AMJulSepcomfortablecoldcoolchilly
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.


The month of August in Saint Petersburg experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 45% to 52%.

The clearest day of the month is August 4, with clear, mostly clear, or partly cloudy conditions 55% of the time.

For reference, on January 24, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 79%, while on July 18, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 57%.

Cloud Cover Categories in August

Cloud Cover Categories in August in Saint Petersburg1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSepAug 155%Aug 155%Aug 3148%Aug 3148%Aug 1154%Aug 1154%Aug 2150%Aug 2150%mostly clearpartly cloudymostly cloudyclearovercast
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.


A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Saint Petersburg, the chance of a wet day over the course of August is essentially constant, remaining around 33% throughout.

For reference, the year's highest daily chance of a wet day is 34% on August 22, and its lowest chance is 16% on March 3.

Probability of Precipitation in August

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).


To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during August in Saint Petersburg is essentially constant, remaining about 2.5 inches throughout, and rarely exceeding 5.0 inches or falling below 0.7 inches.

The highest average 31-day accumulation is 2.6 inches on August 9.

Average Monthly Rainfall in August

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.


Over the course of August in Saint Petersburg, the length of the day is very rapidly decreasing. From the start to the end of the month, the length of the day decreases by 2 hours, 35 minutes, implying an average daily decrease of 5 minutes, 10 seconds, and weekly decrease of 36 minutes, 12 seconds.

The shortest day of the month is August 31, with 14 hours, 13 minutes of daylight and the longest day is August 1, with 16 hours, 49 minutes of daylight.

Hours of Daylight and Twilight in August

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Saint Petersburg is 4:39 AM on August 1 and the latest sunrise is 1 hour, 12 minutes later at 5:51 AM on August 31.

The latest sunset is 9:28 PM on August 1 and the earliest sunset is 1 hour, 24 minutes earlier at 8:04 PM on August 31.

Daylight saving time is not observed in Saint Petersburg during 2017.

For reference, on June 21, the longest day of the year, the Sun rises at 3:35 AM and sets 18 hours, 51 minutes later, at 10:25 PM, while on December 21, the shortest day of the year, it rises at 10:00 AM and sets 5 hours, 53 minutes later, at 3:53 PM.

Sunrise & Sunset with Twilight in August

The solar day over the course of August. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.


We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Saint Petersburg is gradually decreasing during August, falling from 3% to 0% over the course of the month.

For reference, on July 25, the muggiest day of the year, there are muggy conditions 3% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in August

Humidity Comfort Levels in August in Saint Petersburg1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%10%20%30%40%50%60%70%80%90%100%JulSepAug 13%Aug 13%Aug 310%Aug 310%Aug 112%Aug 112%Aug 211%Aug 211%humidhumiddrydrycomfortablecomfortablemuggymuggy
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.


This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Saint Petersburg is essentially constant during August, remaining within 0.1 miles per hour of 3.1 miles per hour throughout.

For reference, on January 1, the windiest day of the year, the daily average wind speed is 4.2 miles per hour, while on July 22, the calmest day of the year, the daily average wind speed is 2.9 miles per hour.

Average Wind Speed in August

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction in Saint Petersburg throughout August is predominantly from the west, with a peak proportion of 36% on August 10.

Wind Direction in August

Wind Direction in August in Saint PetersburgWS1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSepsouthnorthwesteast
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Saint Petersburg is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Saint Petersburg is essentially constant during August, remaining within 1°F of 61°F throughout.

The highest average surface water temperature during August is 62°F on August 14.

Average Water Temperature in August

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Saint Petersburg is rapidly decreasing during August, falling by 1.6 kWh, from 5.3 kWh to 3.7 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in August

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.


For the purposes of this report, the geographical coordinates of Saint Petersburg are 59.939 deg latitude, 30.314 deg longitude, and 39 ft elevation.

The topography within 2 miles of Saint Petersburg is essentially flat, with a maximum elevation change of 92 feet and an average elevation above sea level of 41 feet. Within 10 miles is essentially flat (256 feet). Within 50 miles contains only modest variations in elevation (719 feet).

The area within 2 miles of Saint Petersburg is covered by artificial surfaces (95%), within 10 miles by artificial surfaces (46%) and water (22%), and within 50 miles by trees (63%) and water (22%).

Data Sources

This report illustrates the typical weather in Saint Petersburg year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Saint Petersburg.

For each station, the records are corrected for the elevation difference between that station and Saint Petersburg according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Saint Petersburg is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Saint Petersburg and a given station.

The stations contributing to this reconstruction are: Pulkovo Airport (50%, 16 kilometers, south) and Rzhevka Airport (50%, 16 kilometers, east).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.