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. You're permitted to use this graph as long as you provide prominent attribution with a link back close to the use of the graph.
For print usage, please acquire a license. Full Year. Spring Summer Fall Winter. History: The daily average high red line and low blue line temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures. The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.
Compare Juneau International Airport to another city:. The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds. The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed both rain and snow fell in the same day.
The average rainfall solid line accumulated over the course of a sliding day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall. The number of hours during which the Sun is visible black line.
From bottom most yellow to top most gray , the color bands indicate: full daylight, twilight civil, nautical, and astronomical , and full night. The solar day over the course of August. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. In Juneau, Alaska, in August , it is raining for When it does not snow in Juneau?
June through September are months without snowfall. What is the month with the warmest ocean in Juneau? The month with the warmest seawater in Juneau is August , with an average ocean temperature of What is the ocean temperature in August in Juneau?
In August , the average ocean temperature in Juneau, Alaska, is Swimming in Even a few minutes in How many hours of daylight does Juneau have in August? In Juneau, Alaska, the average length of the day in August is How long on average sun shines in August in Juneau? The average sunshine in August in Juneau is 5. What is the UV index intensity in August in Juneau? Average temperature in August Juneau, AK.
Average pressure in August Juneau, AK. Average wind speed in August Juneau, AK. Average humidity in August Juneau, AK.
Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed. Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies. Our precipitation score , which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.
The growing season at Juneau International Airport typically lasts for 5. 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. Based on growing degree days alone, the first spring blooms at Juneau International Airport should appear around June 1 , only rarely appearing before May 18 or after June 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 experiences extreme seasonal variation over the course of the year. The brighter period of the year lasts for 3. The brightest month of the year at Juneau International Airport is June , with an average of 5.
The darker period of the year lasts for 4. The darkest month of the year at Juneau International Airport is December , with an average of 0. For the purposes of this report, the geographical coordinates of Juneau International Airport are The topography within 2 miles of Juneau International Airport contains very significant variations in elevation, with a maximum elevation change of 1, feet and an average elevation above sea level of feet.
Within 10 miles contains very significant variations in elevation 5, feet. Within 50 miles also contains extreme variations in elevation 8, feet. This report illustrates the typical weather at Juneau International Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, to December 31, Juneau International 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. 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. All data relating to the Sun's position e. 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 kilometer grid. 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. 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. Please review our full terms contained on our Terms of Service page.
The amount of rain in August is high with an average of mm 5. The average maximum daytime temperature lies around The sun will occasionally show itself with hours of sunshine during the whole month.
So what to wear in August? Visitors traveling to Juneau should plan on bringing a totally waterproof rain jacket since it will often be raining. Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly. No idea where to travel to this year? We now have a tool which suggests which destination suits your ideal climate conditions.
Find out where to go with our weather planner. For other monthly average weather and what to do in August look at the numbers below.
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