June Weather in Aland Islands Åland IslandsDaily high temperatures increase by 6°F, from 59°F to 65°F, rarely falling below 50°F or exceeding 73°F. Daily low temperatures increase by 7°F, from 44°F to 51°F, rarely falling below 36°F or exceeding 58°F. For reference, on July 24, the hottest day of the year, temperatures in Aland Islands typically range from 54°F to 68°F, while on February 10, the coldest day of the year, they range from 21°F to 31°F. The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on June. 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. CloudsThe month of June in Aland Islands experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 46% to 42%. The clearest day of the month is June 30, with clear, mostly clear, or partly cloudy conditions 58% of the time. For reference, on January 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 71%, while on July 10, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 59%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Aland Islands, the chance of a wet day over the course of June is essentially constant, remaining around 21% throughout. For reference, the year's highest daily chance of a wet day is 31% on November 28, and its lowest chance is 16% on March 27. 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 June in Aland Islands is gradually increasing, starting the month at 1.5 inches, when it rarely exceeds 2.7 inches or falls below 0.5 inches, and ending the month at 1.8 inches, when it rarely exceeds 3.2 inches or falls below 0.7 inches. SunOver the course of June in Aland Islands, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 25 minutes, implying an average daily increase of 51 seconds, and weekly increase of 6 minutes, 0 seconds. The shortest day of the month is June 1, with 18 hours, 25 minutes of daylight and the longest day is June 21, with 18 hours, 58 minutes of daylight. The latest sunrise of the month in Aland Islands is 4:26 AM on June 1 and the earliest sunrise is 14 minutes earlier at 4:12 AM on June 19. The earliest sunset is 10:50 PM on June 1 and the latest sunset is 20 minutes later at 11:10 PM on June 22. Daylight saving time is observed in Aland Islands during 2024, but it neither starts nor ends during June, so the entire month is in standard time. For reference, on June 20, the longest day of the year, the Sun rises at 4:12 AM and sets 18 hours, 58 minutes later, at 11:10 PM, while on December 21, the shortest day of the year, it rises at 9:44 AM and sets 5 hours, 47 minutes later, at 3:31 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 June 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 Aland Islands is essentially constant during June, remaining around 0% throughout. For reference, on July 29, the muggiest day of the year, there are muggy conditions 2% of the time, while on September 16, 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 Aland Islands is essentially constant during June, remaining within 0.1 miles per hour of 11.4 miles per hour throughout. For reference, on December 14, the windiest day of the year, the daily average wind speed is 17.6 miles per hour, while on July 8, the calmest day of the year, the daily average wind speed is 11.3 miles per hour. The hourly average wind direction in Aland Islands throughout June is predominantly from the south, with a peak proportion of 39% on June 30. Water TemperatureAland Islands 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 Aland Islands is rapidly increasing during June, rising by 9°F, from 47°F to 56°F, over the course of the month. 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 Aland Islands typically lasts for 4.5 months (138 days), from around May 16 to around October 1, rarely starting before April 28 or after June 3, and rarely ending before September 13 or after October 19. The month of June in Aland Islands is more likely than not fully within the growing season, with the chance that a given day is in the growing season increasing from 88% to 100% over the course of the month. 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 Aland Islands are increasing during June, increasing by 190°F, from 86°F to 276°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 Aland Islands is essentially constant during June, remaining within 0.1 kWh of 6.4 kWh throughout. The highest average daily incident shortwave solar energy during June is 6.6 kWh on June 29. TopographyFor the purposes of this report, the geographical coordinates of Aland Islands are 60.250 deg latitude, 20.000 deg longitude, and 0 ft elevation. The topography within 2 miles of Aland Islands is essentially flat, with a maximum elevation change of 0 feet and an average elevation above sea level of 0 feet. Within 10 miles is also essentially flat (0 feet). Within 50 miles is also essentially flat (0 feet). The area within 2 miles of Aland Islands is covered by trees (59%), cropland (16%), and water (15%), within 10 miles by trees (54%) and water (27%), and within 50 miles by water (89%). Data SourcesThis report illustrates the typical weather in Aland Islands, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. The details of the data sources used for this report can be found on the Mariehamn Airport page. 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. 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