Spring Weather at Dala Airport SwedenDaily high temperatures increase by 29°F, from 34°F to 63°F, rarely falling below 24°F or exceeding 75°F. Daily low temperatures increase by 23°F, from 21°F to 44°F, rarely falling below 4°F or exceeding 51°F. For reference, on July 19, the hottest day of the year, temperatures at Dala Airport typically range from 52°F to 71°F, while on February 9, the coldest day of the year, they range from 18°F to 30°F. The figure below shows you a compact characterization of the hourly average spring 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. Haines, United States (4,027 miles away) is the far-away foreign place with temperatures most similar to Dala Airport (view comparison). CloudsThe spring at Dala Airport experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 71% to 50%. The clearest day of the spring is May 31, with clear, mostly clear, or partly cloudy conditions 50% of the time. For reference, on November 19, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 76%, while on July 6, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 53%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Dala Airport, the chance of a wet day over the course of the spring is very rapidly increasing, starting the season at 16% and ending it at 29%. For reference, the year's highest daily chance of a wet day is 36% on August 19, and its lowest chance is 16% on February 28. Over the course of the spring at Dala Airport, the chance of a day with only rain increases from 5% to 29%, the chance of a day with mixed snow and rain decreases from 5% to 0%, and the chance of a day with only snow decreases from 5% to 0%. RainfallTo 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 spring at Dala Airport is rapidly increasing, starting the season at 0.4 inches, when it rarely exceeds 0.9 inches, and ending the season at 2.4 inches, when it rarely exceeds 3.9 inches or falls below 1.0 inches. SnowfallAs with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day. The average sliding 31-day snowfall during the spring at Dala Airport is rapidly decreasing, starting the season at 4.3 inches, when it rarely exceeds 9.1 inches or falls below 0.4 inches, and ending the season at 0.0 inches, when it rarely exceeds 0.1 inches. SunOver the course of the spring at Dala Airport, the length of the day is very rapidly increasing. From the start to the end of the season, the length of the day increases by 7 hours, 56 minutes, implying an average daily increase of 5 minutes, 14 seconds, and weekly increase of 36 minutes, 35 seconds. The shortest day of the spring is March 1, with 10 hours, 29 minutes of daylight and the longest day is May 31, with 18 hours, 25 minutes of daylight. The latest sunrise of the spring at Dala Airport is 6:56 AM on March 1 and the earliest sunrise is 3 hours, 12 minutes earlier at 3:43 AM on May 31. The earliest sunset is 5:25 PM on March 1 and the latest sunset is 4 hours, 43 minutes later at 10:08 PM on May 31. Daylight saving time (DST) ends at 3:00 AM on March 31, 2024, shifting sunrise and sunset to be an hour earlier. For reference, on June 20, the longest day of the year, the Sun rises at 3:28 AM and sets 19 hours, 2 minutes later, at 10:30 PM, while on December 21, the shortest day of the year, it rises at 9:04 AM and sets 5 hours, 44 minutes later, at 2:48 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 the spring 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. 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 at Dala Airport is essentially constant during the spring, remaining around 0% throughout. For reference, on July 22, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, 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 at Dala Airport is essentially constant during the spring, remaining within 0.1 miles per hour of 4.7 miles per hour throughout. For reference, on January 2, the windiest day of the year, the daily average wind speed is 5.2 miles per hour, while on July 29, the calmest day of the year, the daily average wind speed is 4.1 miles per hour. The wind direction at Dala Airport during the spring is predominantly out of the west from March 1 to April 18 and the south from April 18 to May 31. 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 at Dala Airport typically lasts for 4.3 months (131 days), from around May 14 to around September 22, rarely starting before April 26 or after May 30, and rarely ending before September 2 or after October 11. During the spring at Dala Airport, the chance that a given day is within the growing season is very rapidly increasing rising from 0% to 92% over the course of the 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 at Dala Airport are gradually increasing during the spring, increasing by 161°F, from 0°F to 161°F, over the course of the season. 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 at Dala Airport is very rapidly increasing during the spring, rising by 4.3 kWh, from 1.5 kWh to 5.8 kWh, over the course of the season. TopographyFor the purposes of this report, the geographical coordinates of Dala Airport are 60.428 deg latitude, 15.505 deg longitude, and 499 ft elevation. The topography within 2 miles of Dala Airport contains only modest variations in elevation, with a maximum elevation change of 312 feet and an average elevation above sea level of 444 feet. Within 10 miles contains only modest variations in elevation (1,070 feet). Within 50 miles also contains very significant variations in elevation (1,759 feet). The area within 2 miles of Dala Airport is covered by cropland (69%), trees (15%), and artificial surfaces (14%), within 10 miles by trees (63%) and cropland (22%), and within 50 miles by trees (81%). Data SourcesThis report illustrates the typical weather at Dala Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointDala Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required. In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations. The stations on which we may fall back include but are not limited to Örebro Airport, Stockholm-Västerås Airport, Gavle-Sandviken Airport, Söderhamn Airport, Dala Järna, Uppsala, Karlstad Airport, and Stockholm Arlanda Airport. 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. |