Average Weather at Skellefteå Airport Sweden

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At Skellefteå Airport, the summers are comfortable and partly cloudy and the winters are long, freezing, snowy, and mostly cloudy. Over the course of the year, the temperature typically varies from 8°F to 69°F and is rarely below -12°F or above 77°F.

The warm season lasts for 3.0 months, from June 2 to September 3, with an average daily high temperature above 60°F. The hottest day of the year is July 24, with an average high of 69°F and low of 53°F.

The cold season lasts for 4.0 months, from November 17 to March 16, with an average daily high temperature below 33°F. The coldest day of the year is February 3, with an average low of 8°F and high of 24°F.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

At Skellefteå Airport, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year at Skellefteå Airport begins around April 12 and lasts for 5.5 months, ending around September 26. On August 4, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 52% of the time, and overcast or mostly cloudy 48% of the time.

The cloudier part of the year begins around September 26 and lasts for 6.5 months, ending around April 12. On January 26, the cloudiest day of the year, the sky is overcast or mostly cloudy 75% of the time, and clear, mostly clear, or partly cloudy 25% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Skellefteå Airport varies throughout the year.

The wetter season lasts 7.0 months, from June 2 to January 2, with a greater than 23% chance of a given day being a wet day. The chance of a wet day peaks at 31% on July 17.

The drier season lasts 5.0 months, from January 2 to June 2. The smallest chance of a wet day is 16% on February 22.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation at Skellefteå Airport changes throughout the year.

Rain alone is the most common for 8.2 months, from March 27 to December 1. The highest chance of a day with rain alone is 31% on July 17.

Snow alone is the most common for 3.8 months, from December 1 to March 27. The highest chance of a day with snow alone is 15% on January 21.

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Skellefteå Airport experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 8.7 months, from March 29 to December 20, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around August 17, with an average total accumulation of 2.7 inches.

The rainless period of the year lasts for 3.3 months, from December 20 to March 29. The least rain falls around February 16, with an average total accumulation of 0.1 inches.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Skellefteå Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 6.7 months, from October 11 to May 3, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 12, with an average total liquid-equivalent accumulation of 0.8 inches.

The snowless period of the year lasts for 5.3 months, from May 3 to October 11. The least snow falls around July 28, with an average total liquid-equivalent accumulation of 0.0 inches.

The length of the day at Skellefteå Airport varies extremely over the course of the year. In 2017, the shortest day is December 21, with 3 hours, 50 minutes of daylight; the longest day is June 21, with 21 hours, 36 minutes of daylight.

The earliest sunrise is at 1:49 AM on June 20, and the latest sunrise is 7 hours, 51 minutes later at 9:39 AM on December 24. The earliest sunset is at 1:28 PM on December 18, and the latest sunset is 9 hours, 58 minutes later at 11:25 PM on June 21.

Daylight saving time (DST) is observed at Skellefteå Airport during 2017, starting in the spring on March 26, lasting 7.1 months, and ending in the fall on October 29.

We 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 perceived humidity level at Skellefteå Airport, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

This 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 Skellefteå Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.2 months, from September 16 to March 21, with average wind speeds of more than 4.0 miles per hour. The windiest day of the year is December 11, with an average hourly wind speed of 4.8 miles per hour.

The calmer time of year lasts for 5.8 months, from March 21 to September 16. The calmest day of the year is June 21, with an average hourly wind speed of 3.2 miles per hour.

The predominant average hourly wind direction at Skellefteå Airport varies throughout the year.

The wind is most often from the south for 3.1 weeks, from February 26 to March 20 and for 5.2 months, from April 24 to September 29, with a peak percentage of 36% on July 23. The wind is most often from the west for 1.1 months, from March 20 to April 24 and for 4.9 months, from September 29 to February 26, with a peak percentage of 33% on March 25.

Skellefteå Airport 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 water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.2 months, from July 6 to September 13, with an average temperature above 53°F. The day of the year with the warmest water is August 6, with an average temperature of 59°F.

The time of year with cooler water lasts for 5.4 months, from December 6 to May 18, with an average temperature below 37°F. The day of the year with the coolest water is February 28, with an average temperature of 31°F.

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 2.9 months, from May 8 to August 6, with an average daily incident shortwave energy per square meter above 4.8 kWh. The brightest day of the year is June 22, with an average of 6.0 kWh.

The darker period of the year lasts for 4.8 months, from October 8 to March 3, with an average daily incident shortwave energy per square meter below 1.2 kWh. The darkest day of the year is December 23, with an average of 0.0 kWh.

For the purposes of this report, the geographical coordinates of Skellefteå Airport are 64.625 deg latitude, 21.077 deg longitude, and 125 ft elevation.

The topography within 2 miles of Skellefteå Airport contains only modest variations in elevation, with a maximum elevation change of 180 feet and an average elevation above sea level of 129 feet. Within 10 miles contains only modest variations in elevation (561 feet). Within 50 miles contains significant variations in elevation (1,654 feet).

The area within 2 miles of Skellefteå Airport is covered by trees (64%), water (19%), and cropland (11%), within 10 miles by trees (66%) and water (20%), and within 50 miles by trees (50%) and water (45%).

This report illustrates the typical weather at Skellefteå 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 Point

Skellefteå 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 Piteå, Umeå Airport, Luleå Airport, Vidsel, Vaasa Airport, Arvidsjaur Airport, Kokkola-Pietarsaari Airport, and Lycksele Airport.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.