Summer Weather in Tanaina Alaska, United StatesDaily high temperatures are around 64°F, rarely falling below 55°F or exceeding 75°F. The highest daily average high temperature is 67°F on July 13. Daily low temperatures are around 48°F, rarely falling below 39°F or exceeding 55°F. The highest daily average low temperature is 51°F on July 20. For reference, on July 13, the hottest day of the year, temperatures in Tanaina typically range from 51°F to 67°F, while on January 16, the coldest day of the year, they range from 11°F to 23°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. Reinsvoll, Norway (3,925 miles away) and Roknäs, Sweden (3,654 miles) are the far-away foreign places with temperatures most similar to Tanaina (view comparison). CloudsThe summer in Tanaina experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 62% throughout the season. The highest chance of overcast or mostly cloudy conditions is 65% on July 10. The clearest day of the summer is August 27, with clear, mostly clear, or partly cloudy conditions 41% of the time. For reference, on July 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 65%, while on March 15, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 49%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Tanaina, the chance of a wet day over the course of the summer is very rapidly increasing, starting the season at 27% and ending it at 42%. For reference, the year's highest daily chance of a wet day is 44% on September 14, and its lowest chance is 14% on March 27. 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 summer in Tanaina is rapidly increasing, starting the season at 1.8 inches, when it rarely exceeds 3.1 inches or falls below 0.7 inches, and ending the season at 3.7 inches, when it rarely exceeds 6.2 inches or falls below 1.9 inches. The highest average 31-day accumulation is 3.8 inches on August 25. SunOver the course of the summer in Tanaina, 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, 38 minutes, implying an average daily decrease of 3 minutes, 4 seconds, and weekly decrease of 21 minutes, 25 seconds. The shortest day of the summer is August 31, with 14 hours, 18 minutes of daylight and the longest day is June 20, with 19 hours, 34 minutes of daylight. The earliest sunrise of the summer in Tanaina is 4:12 AM on June 18 and the latest sunrise is 2 hours, 35 minutes later at 6:47 AM on August 31. The latest sunset is 11:46 PM on June 22 and the earliest sunset is 2 hours, 41 minutes earlier at 9:06 PM on August 31. Daylight saving time is observed in Tanaina during 2024, but it neither starts nor ends during the summer, so the entire season is in standard time. For reference, on June 20, the longest day of the year, the Sun rises at 4:12 AM and sets 19 hours, 34 minutes later, at 11:46 PM, while on December 21, the shortest day of the year, it rises at 10:17 AM and sets 5 hours, 18 minutes later, at 3:35 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 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. 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 Tanaina is essentially constant during the summer, remaining around 0% throughout. 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 Tanaina is essentially constant during the summer, remaining within 0.4 miles per hour of 4.1 miles per hour throughout. For reference, on January 8, the windiest day of the year, the daily average wind speed is 7.5 miles per hour, while on June 26, the calmest day of the year, the daily average wind speed is 3.7 miles per hour. The lowest daily average wind speed during the summer is 3.7 miles per hour on June 26. The hourly average wind direction in Tanaina throughout the summer is predominantly from the south, with a peak proportion of 59% on July 2. Water TemperatureTanaina 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 Tanaina is very rapidly increasing during the summer, rising by 11°F, from 40°F to 51°F, over the course of the season. The highest average surface water temperature during the summer is 52°F on August 16. 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 Tanaina typically lasts for 4.6 months (141 days), from around May 6 to around September 24, rarely starting before April 17 or after May 24, and rarely ending before September 6 or after October 13. The summer in Tanaina 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 13. 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 Tanaina are rapidly increasing during the summer, increasing by 634°F, from 97°F to 731°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 in Tanaina is very rapidly decreasing during the summer, falling by 2.5 kWh, from 5.8 kWh to 3.3 kWh, over the course of the season. The highest average daily incident shortwave solar energy during the summer is 5.8 kWh on June 8. TopographyFor the purposes of this report, the geographical coordinates of Tanaina are 61.627 deg latitude, -149.428 deg longitude, and 495 ft elevation. The topography within 2 miles of Tanaina contains only modest variations in elevation, with a maximum elevation change of 184 feet and an average elevation above sea level of 479 feet. Within 10 miles contains only modest variations in elevation (4,836 feet). Within 50 miles also contains extreme variations in elevation (10,200 feet). The area within 2 miles of Tanaina is covered by trees (53%) and artificial surfaces (41%), within 10 miles by trees (44%) and shrubs (22%), and within 50 miles by trees (25%) and shrubs (21%). Data SourcesThis report illustrates the typical weather in Tanaina, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Tanaina. For each station, the records are corrected for the elevation difference between that station and Tanaina 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 Tanaina is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Tanaina and a given station. 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 Tanaina 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. |