Average Weather in Frederikssund Denmark

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In Frederikssund, the summers are comfortable and partly cloudy; the winters are long, chilly, and mostly cloudy; and it is windy year round. Over the course of the year, the temperature typically varies from 29°F to 70°F and is rarely below 16°F or above 79°F.

The warm season lasts for 3.2 months, from June 5 to September 10, with an average daily high temperature above 63°F. The hottest day of the year is August 1, with an average high of 70°F and low of 56°F.

The cold season lasts for 4.0 months, from November 22 to March 21, with an average daily high temperature below 44°F. The coldest day of the year is February 8, with an average low of 29°F and high of 37°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.

In Frederikssund, 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 in Frederikssund begins around April 13 and lasts for 6.1 months, ending around October 17. On July 13, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 59% of the time, and overcast or mostly cloudy 41% of the time.

The cloudier part of the year begins around October 17 and lasts for 5.9 months, ending around April 13. On December 18, the cloudiest day of the year, the sky is overcast or mostly cloudy 70% of the time, and clear, mostly clear, or partly cloudy 30% 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 in Frederikssund varies throughout the year.

The wetter season lasts 7.7 months, from June 11 to February 3, with a greater than 26% chance of a given day being a wet day. The chance of a wet day peaks at 34% on October 30.

The drier season lasts 4.3 months, from February 3 to June 11. The smallest chance of a wet day is 18% on April 24.

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 throughout the year is rain alone, with a peak probability of 33% on October 30.

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. Frederikssund experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Frederikssund. The most rain falls during the 31 days centered around June 26, with an average total accumulation of 2.1 inches.

The least rain falls around April 15, with an average total accumulation of 1.1 inches.

Snowfall

The sliding 31-day liquid-equivalent quantity of snowfall in Frederikssund does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.

The length of the day in Frederikssund varies extremely over the course of the year. In 2017, the shortest day is December 21, with 6 hours, 59 minutes of daylight; the longest day is June 21, with 17 hours, 35 minutes of daylight.

The earliest sunrise is at 4:25 AM on June 18, and the latest sunrise is 4 hours, 17 minutes later at 8:42 AM on December 28. The earliest sunset is at 3:37 PM on December 14, and the latest sunset is 6 hours, 24 minutes later at 10:01 PM on June 24.

Daylight saving time (DST) is observed in Frederikssund 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 in Frederikssund, 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, staying within 1% of 1% 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 in Frederikssund experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.2 months, from September 20 to March 27, with average wind speeds of more than 7.2 miles per hour. The windiest day of the year is January 24, with an average hourly wind speed of 8.6 miles per hour.

The calmer time of year lasts for 5.8 months, from March 27 to September 20. The calmest day of the year is July 19, with an average hourly wind speed of 5.9 miles per hour.

The predominant average hourly wind direction in Frederikssund varies throughout the year.

The wind is most often from the south for 1.0 months, from October 26 to November 26, with a peak percentage of 36% on November 9. The wind is most often from the west for 11 months, from November 26 to October 26, with a peak percentage of 40% on January 1.

Frederikssund 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 3.1 months, from June 17 to September 19, with an average temperature above 58°F. The day of the year with the warmest water is August 5, with an average temperature of 64°F.

The time of year with cooler water lasts for 4.2 months, from December 9 to April 14, with an average temperature below 41°F. The day of the year with the coolest water is February 18, with an average temperature of 35°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 3.3 months, from May 2 to August 12, with an average daily incident shortwave energy per square meter above 5.2 kWh. The brightest day of the year is June 25, with an average of 6.4 kWh.

The darker period of the year lasts for 4.2 months, from October 19 to February 24, with an average daily incident shortwave energy per square meter below 1.6 kWh. The darkest day of the year is December 18, with an average of 0.4 kWh.

For the purposes of this report, the geographical coordinates of Frederikssund are 55.840 deg latitude, 12.069 deg longitude, and 33 ft elevation.

The topography within 2 miles of Frederikssund contains only modest variations in elevation, with a maximum elevation change of 171 feet and an average elevation above sea level of 30 feet. Within 10 miles also contains only modest variations in elevation (240 feet). Within 50 miles contains only modest variations in elevation (896 feet).

The area within 2 miles of Frederikssund is covered by cropland (32%), water (30%), and artificial surfaces (28%), within 10 miles by cropland (51%) and water (28%), and within 50 miles by water (52%) and cropland (32%).

This report illustrates the typical weather in Frederikssund, 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

There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Frederikssund.

For each station, the records are corrected for the elevation difference between that station and Frederikssund 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 Frederikssund is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Frederikssund and a given station.

The stations contributing to this reconstruction are: Værløse (59%, 19 kilometers, southeast); Roskilde Airport (32%, 28 kilometers, south); Aarhus Airport (4.7%, 104 kilometers, northwest); and Odense Airport (3.9%, 116 kilometers, west).

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.