July Weather in Krāslava LatviaDaily high temperatures increase by 2°F, from 70°F to 72°F, rarely falling below 61°F or exceeding 82°F. The highest daily average high temperature is 73°F on July 23. Daily low temperatures are around 55°F, rarely falling below 48°F or exceeding 62°F. The highest daily average low temperature is 56°F on July 23. For reference, on July 23, the hottest day of the year, temperatures in Krāslava typically range from 56°F to 73°F, while on February 4, the coldest day of the year, they range from 15°F to 26°F. 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. Calgary, Canada (4,727 miles away); Ontonagon, United States (4,449 miles); and Stamford, United States (4,269 miles) are the far-away foreign places with temperatures most similar to Krāslava (view comparison). CloudsThe month of July in Krāslava 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 17. The clearest day of the month is July 17, with clear, mostly clear, or partly cloudy conditions 57% of the time. For reference, on January 2, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 81%, while on July 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 57%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Krāslava, the chance of a wet day over the course of July is decreasing, starting the month at 37% and ending it at 32%. For reference, the year's highest daily chance of a wet day is 38% on June 29, and its lowest chance is 18% on March 11. RainfallTo 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 Krāslava is gradually decreasing, starting the month at 2.9 inches, when it rarely exceeds 5.0 inches or falls below 1.2 inches, and ending the month at 2.7 inches, when it rarely exceeds 4.9 inches or falls below 0.9 inches. The highest average 31-day accumulation is 2.9 inches on July 11. SunOver the course of July in Krāslava, 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, 24 minutes, implying an average daily decrease of 2 minutes, 47 seconds, and weekly decrease of 19 minutes, 29 seconds. The shortest day of the month is July 31, with 16 hours, 5 minutes of daylight and the longest day is July 1, with 17 hours, 29 minutes of daylight. The earliest sunrise of the month in Krāslava is 4:30 AM on July 1 and the latest sunrise is 44 minutes later at 5:14 AM on July 31. The latest sunset is 9:59 PM on July 1 and the earliest sunset is 40 minutes earlier at 9:19 PM on July 31. Daylight saving time is observed in Krāslava during 2024, but it neither starts nor ends during July, so the entire month is in standard time. For reference, on June 20, the longest day of the year, the Sun rises at 4:25 AM and sets 17 hours, 36 minutes later, at 10:00 PM, while on December 21, the shortest day of the year, it rises at 8:40 AM and sets 6 hours, 58 minutes later, at 3:38 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. MoonThe figure below presents a compact representation of key lunar data for July 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.
HumidityWe 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 Krāslava is essentially constant during July, remaining within 1% of 6% throughout. The highest chance of a muggy day during July is 7% on July 24. For reference, on July 24, the muggiest day of the year, there are muggy conditions 7% of the time, while on October 9, the least muggy day of the year, there are muggy conditions 0% of the time. WindThis 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 Krāslava is essentially constant during July, remaining within 0.1 miles per hour of 4.6 miles per hour throughout. For reference, on January 24, the windiest day of the year, the daily average wind speed is 7.2 miles per hour, while on July 20, the calmest day of the year, the daily average wind speed is 4.5 miles per hour. The lowest daily average wind speed during July is 4.5 miles per hour on July 21. The hourly average wind direction in Krāslava throughout July is predominantly from the west, with a peak proportion of 37% on July 1. Growing SeasonDefinitions 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 Krāslava typically lasts for 5.5 months (167 days), from around April 28 to around October 12, rarely starting before April 11 or after May 17, and rarely ending before September 21 or after October 31. The month of July in Krāslava is reliably fully within the growing season. 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 Krāslava are increasing during July, increasing by 423°F, from 587°F to 1,010°F, over the course of the month. Solar EnergyThis 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 Krāslava is gradually decreasing during July, falling by 0.5 kWh, from 6.1 kWh to 5.5 kWh, over the course of the month. TopographyFor the purposes of this report, the geographical coordinates of Krāslava are 55.895 deg latitude, 27.168 deg longitude, and 374 ft elevation. The topography within 2 miles of Krāslava contains only modest variations in elevation, with a maximum elevation change of 249 feet and an average elevation above sea level of 443 feet. Within 10 miles also contains only modest variations in elevation (482 feet). Within 50 miles contains only modest variations in elevation (673 feet). The area within 2 miles of Krāslava is covered by trees (49%), cropland (31%), and artificial surfaces (12%), within 10 miles by trees (49%) and cropland (32%), and within 50 miles by trees (43%) and cropland (33%). Data SourcesThis report illustrates the typical weather in Krāslava, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointThere are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Krāslava. For each station, the records are corrected for the elevation difference between that station and Krāslava 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 Krāslava is computed as the weighted average of the individual contributions from each station, in addition to a contribution from the MERRA-2 reconstruction, corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Krāslava. The station weights are proportional to the inverse of the distance between Krāslava and a given station. The weight assigned to the MERRA-2 value depends on the distance from Krāslava to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 32%. The stations contributing to this reconstruction are:
To get a sense of how much these sources agree with each other, you can view a comparison of Krāslava and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data. Other DataAll data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com . Maps are © OpenStreetMap contributors. DisclaimerThe 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. Please review our full terms contained on our Terms of Service page. |