Average Weather in Lillehammer Norway

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5. Lillehammer

In Lillehammer, the summers are cool and wet; the winters are long, freezing, and snowy; and it is mostly cloudy year round. Over the course of the year, the temperature typically varies from 12°F to 67°F and is rarely below -4°F or above 77°F.

The warm season lasts for 3.4 months, from May 25 to September 6, with an average daily high temperature above 58°F. The hottest day of the year is July 19, with an average high of 67°F and low of 49°F.

The cold season lasts for 3.9 months, from November 14 to March 10, with an average daily high temperature below 33°F. The coldest day of the year is February 6, with an average low of 12°F and high of 25°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 Lillehammer, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year in Lillehammer begins around April 21 and lasts for 4.8 months, ending around September 16. On July 18, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 48% of the time, and overcast or mostly cloudy 52% of the time.

The cloudier part of the year begins around September 16 and lasts for 7.2 months, ending around April 21. On November 10, 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 Lillehammer varies throughout the year.

The wetter season lasts 4.4 months, from May 24 to October 4, with a greater than 33% chance of a given day being a wet day. The chance of a wet day peaks at 45% on July 3.

The drier season lasts 7.6 months, from October 4 to May 24. The smallest chance of a wet day is 21% on February 10.

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 in Lillehammer changes throughout the year.

Rain alone is the most common for 7.7 months, from March 28 to November 17. The highest chance of a day with rain alone is 45% on July 3.

Snow alone is the most common for 4.3 months, from November 17 to March 28. The highest chance of a day with snow alone is 21% on January 17.

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. Lillehammer experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.2 months, from March 14 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 5, with an average total accumulation of 3.9 inches.

The rainless period of the year lasts for 2.8 months, from December 20 to March 14. The least rain falls around February 4, with an average total accumulation of 0.3 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. Lillehammer experiences significant seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 7.1 months, from October 4 to May 6, 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 17, with an average total liquid-equivalent accumulation of 1.3 inches.

The snowless period of the year lasts for 4.9 months, from May 6 to October 4. The least snow falls around July 20, with an average total liquid-equivalent accumulation of 0.0 inches.

The length of the day in Lillehammer varies extremely over the course of the year. In 2017, the shortest day is December 21, with 5 hours, 29 minutes of daylight; the longest day is June 21, with 19 hours, 20 minutes of daylight.

The earliest sunrise is at 3:39 AM on June 19, and the latest sunrise is 5 hours, 53 minutes later at 9:33 AM on December 26. The earliest sunset is at 2:59 PM on December 16, and the latest sunset is 8 hours, 0 minutes later at 11:00 PM on June 22.

Daylight saving time (DST) is observed in Lillehammer 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 Lillehammer, 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 predominant average hourly wind direction in Lillehammer varies throughout the year.

The wind is most often from the south for 1.3 months, from February 25 to April 3 and for 6.5 months, from May 5 to November 19, with a peak percentage of 43% on August 7. The wind is most often from the north for 1.1 months, from April 3 to May 5 and for 1.3 weeks, from November 24 to December 3, with a peak percentage of 32% on May 2. The wind is most often from the west for 5.0 days, from November 19 to November 24 and for 2.8 months, from December 3 to February 25, with a peak percentage of 29% on November 20.

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 3.2 months, from May 3 to August 8, with an average daily incident shortwave energy per square meter above 4.7 kWh. The brightest day of the year is June 14, with an average of 5.8 kWh.

The darker period of the year lasts for 4.4 months, from October 12 to February 24, with an average daily incident shortwave energy per square meter below 1.3 kWh. The darkest day of the year is December 23, with an average of 0.1 kWh.

For the purposes of this report, the geographical coordinates of Lillehammer are 61.115 deg latitude, 10.466 deg longitude, and 1,247 ft elevation.

The topography within 2 miles of Lillehammer contains very significant variations in elevation, with a maximum elevation change of 1,447 feet and an average elevation above sea level of 906 feet. Within 10 miles contains very significant variations in elevation (3,156 feet). Within 50 miles contains large variations in elevation (5,128 feet).

The area within 2 miles of Lillehammer is covered by artificial surfaces (38%), trees (34%), water (15%), and cropland (12%), within 10 miles by trees (63%) and herbaceous vegetation (11%), and within 50 miles by trees (61%) and herbaceous vegetation (13%).

This report illustrates the typical weather in Lillehammer, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Lillehammer.

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

The stations contributing to this reconstruction are: Oslo Airport, Gardermoen (50%, 108 kilometers, south); Røros Airport (26%, 169 kilometers, north); and Dala Järna (24%, 182 kilometers, east).

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.