Summer Weather in Saint Petersburg Russia

Daily high temperatures are around 69°F, rarely falling below 54°F or exceeding 83°F. The highest daily average high temperature is 73°F on July 24.

Daily low temperatures are around 51°F, rarely falling below 38°F or exceeding 61°F. The highest daily average low temperature is 55°F on July 25.

For reference, on July 24, 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.

The figure below shows you a compact characterization of the hourly average summer temperatures. 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.

Laurium, United States (4,278 miles away); Dover, United States (4,121 miles); and Gambo, Canada (3,248 miles) are the far-away foreign places with temperatures most similar to Saint Petersburg (view comparison).

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The summer in Saint Petersburg experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 48% throughout the season. The lowest chance of overcast or mostly cloudy conditions is 43% on July 17.

The clearest day of the summer is July 17, with clear, mostly clear, or partly cloudy conditions 57% 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 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 57%.

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 the summer is increasing, starting the season at 28% and ending it at 32%.

For reference, the year's highest daily chance of a wet day is 34% on August 21, and its lowest chance is 16% on March 2.

Rainfall

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

The average sliding 31-day rainfall during the summer in Saint Petersburg is essentially constant, remaining about 2.4 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 June 26.

Over the course of the summer in Saint Petersburg, the length of the day is very rapidly decreasing. From the start to the end of the season, the length of the day decreases by 4 hours, 6 minutes, implying an average daily decrease of 2 minutes, 43 seconds, and weekly decrease of 18 minutes, 58 seconds.

The shortest day of the summer is August 31, with 14 hours, 12 minutes of daylight and the longest day is June 20, with 18 hours, 51 minutes of daylight.

The earliest sunrise of the summer in Saint Petersburg is 3:34 AM on June 18 and the latest sunrise is 2 hours, 17 minutes later at 5:52 AM on August 31.

The latest sunset is 10:26 PM on June 23 and the earliest sunset is 2 hours, 22 minutes earlier at 8:04 PM on August 31.

Daylight saving time is not observed in Saint Petersburg during 2024.

For reference, on June 20, 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.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the summer of 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

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 essentially constant during the summer, remaining within 2% of 2% throughout.

The highest chance of a muggy day during the summer is 3% on July 24.

For reference, on July 24, 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.

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 the summer, remaining within 0.3 miles per hour of 5.6 miles per hour throughout.

For reference, on January 1, the windiest day of the year, the daily average wind speed is 7.8 miles per hour, while on July 21, the calmest day of the year, the daily average wind speed is 5.3 miles per hour.

The lowest daily average wind speed during the summer is 5.3 miles per hour on July 21.

The hourly average wind direction in Saint Petersburg throughout the summer is predominantly from the west, with a peak proportion of 40% on June 3.

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 very rapidly increasing during the summer, rising by 12°F, from 49°F to 60°F, over the course of the season.

The highest average surface water temperature during the summer is 62°F on August 13.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Saint Petersburg typically lasts for 4.8 months (147 days), from around May 9 to around October 3, rarely starting before April 19 or after May 28, and rarely ending before September 12 or after October 22.

The summer in Saint Petersburg is very likely fully within the growing season, with the chance that a given day is in the growing season reaching a high of 100% on July 16.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Saint Petersburg are very rapidly increasing during the summer, increasing by 1,103°F, from 207°F to 1,310°F, over the course of the season.

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 very rapidly decreasing during the summer, falling by 2.2 kWh, from 5.8 kWh to 3.6 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the summer is 6.0 kWh on June 28.

For the purposes of this report, the geographical coordinates of Saint Petersburg are 59.939 deg latitude, 30.314 deg longitude, and 43 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%).