Average Weather in July in Saint Petersburg Russia
In Saint Petersburg, the month of July is characterized by gradually rising daily high temperatures, with daily highs increasing by 2°F, from 71°F to 73°F over the course of the month, and rarely exceeding 83°F or dropping below 61°F. The highest daily average high temperature is 73°F on July 25.
Daily low temperatures increase by 2°F, from 53°F to 55°F, rarely falling below 46°F or exceeding 61°F. The highest daily average low temperature is 55°F on July 26.
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 July
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. 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 July
The month of July in Saint Petersburg experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 44% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 43% on July 18.
The clearest day of the month is July 18, 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 18, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 57%.
Cloud Cover Categories in July
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 July is essentially constant, remaining around 32% 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 July
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 July in Saint Petersburg is essentially constant, remaining about 2.6 inches throughout, and rarely exceeding 4.8 inches or falling below 0.7 inches.
Average Monthly Rainfall in July
Over the course of July in Saint Petersburg, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 48 minutes, implying an average daily decrease of 3 minutes, 36 seconds, and weekly decrease of 25 minutes, 12 seconds.
The shortest day of the month is July 31, with 16 hours, 53 minutes of daylight and the longest day is July 1, with 18 hours, 41 minutes of daylight.
Hours of Daylight and Twilight in July
The earliest sunrise of the month in Saint Petersburg is 3:41 AM on July 1 and the latest sunrise is 56 minutes later at 4:37 AM on July 31.
The latest sunset is 10:23 PM on July 1 and the earliest sunset is 52 minutes earlier at 9:30 PM on July 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 July
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 July, remaining within 1% of 2% throughout.
The highest chance of a muggy day during July is 3% on July 25.
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 July
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 July, remaining within 0.1 miles per hour of 5.4 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 22, the calmest day of the year, the daily average wind speed is 5.3 miles per hour.
The lowest daily average wind speed during July is 5.3 miles per hour on July 22.
Average Wind Speed in July
Wind Direction in July
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 increasing during July, rising by 5°F, from 56°F to 61°F, over the course of the month.
Average Water Temperature in July
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 10 to around October 4, rarely starting before April 20 or after May 29, and rarely ending before September 13 or after October 23.
The month of July in Saint Petersburg is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in July
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 is increasing during July, increasing by 434°F, from 504°F to 938°F, over the course of the month.
Growing Degree Days in July
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 gradually decreasing during July, falling by 0.7 kWh, from 6.0 kWh to 5.3 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in July
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%).
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.
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.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.