Fall Weather in Kiruna Sweden

Daily high temperatures decrease by 30°F, from 52°F to 22°F, rarely falling below 9°F or exceeding 61°F.

Daily low temperatures decrease by 30°F, from 38°F to 9°F, rarely falling below -9°F or exceeding 47°F.

For reference, on July 21, the hottest day of the year, temperatures in Kiruna typically range from 46°F to 62°F, while on January 25, the coldest day of the year, they range from 2°F to 16°F.

The figure below shows you a compact characterization of the hourly average fall 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.

Chevak, United States (3,496 miles away) and Sutton-Alpine, United States (3,467 miles) are the far-away foreign places with temperatures most similar to Kiruna (view comparison).

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The fall in Kiruna experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 62% to 71%.

The clearest day of the fall is September 1, with clear, mostly clear, or partly cloudy conditions 38% of the time.

For reference, on January 18, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 75%, while on June 14, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 47%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Kiruna, the chance of a wet day over the course of the fall is very rapidly decreasing, starting the season at 30% and ending it at 17%.

For reference, the year's highest daily chance of a wet day is 41% on July 12, and its lowest chance is 12% on March 1.

Over the course of the fall in Kiruna, the chance of a day with only rain decreases from 29% to 0%, the chance of a day with mixed snow and rain remains an essentially constant 3% throughout, and the chance of a day with only snow increases from 0% to 16%.

Rainfall

To 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 fall in Kiruna is very rapidly decreasing, starting the season at 2.2 inches, when it rarely exceeds 3.8 inches or falls below 0.9 inches, and ending the season at 0.0 inches, when it rarely exceeds 0.1 inches or falls below -0.0 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during the fall in Kiruna is very rapidly increasing, starting the season at 0.2 inches, when it rarely exceeds 0.7 inches or falls below -0.0 inches, and ending the season at 7.4 inches, when it rarely exceeds 13.7 inches or falls below 2.1 inches.

The highest average 31-day accumulation is 8.2 inches on November 8.

Due to its extreme latitude, Kiruna experiences polar day (also known as the midnight Sun) during the summer and polar night during the winter. These are periods of time in which the sun is continuously above or below the horizon for more than one day. The precise start and end dates of polar day and night vary from year to year and depend on the precise location and elevation of the observer, and the local topography.

Neither polar day nor polar night occur during the fall.

Over the course of the fall in Kiruna, 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 12 hours, 20 minutes, implying an average daily decrease of 8 minutes, 13 seconds, and weekly decrease of 57 minutes, 33 seconds.

The shortest day of the fall is November 30, with 2 hours, 41 minutes of daylight and the longest day is September 1, with 15 hours, 1 minute of daylight.

The earliest sunrise of the fall in Kiruna is 5:07 AM on September 1 and the latest sunrise is 5 hours, 0 minutes later at 10:07 AM on November 30.

The latest sunset is 8:08 PM on September 1 and the earliest sunset is 7 hours, 20 minutes earlier at 12:48 PM on November 30.

Daylight saving time (DST) starts at 2:00 AM on October 27, 2024, shifting sunrise and sunset to be an hour later.

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.

The figure below presents a compact representation of key lunar data for the fall 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.

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 chance that a given day will be muggy in Kiruna is essentially constant during the fall, remaining around 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 in Kiruna is increasing during the fall, increasing from 6.2 miles per hour to 7.6 miles per hour over the course of the season.

For reference, on January 23, the windiest day of the year, the daily average wind speed is 8.4 miles per hour, while on August 11, the calmest day of the year, the daily average wind speed is 6.0 miles per hour.

The wind direction in Kiruna during the fall is predominantly out of the south from September 1 to September 27 and the west from September 27 to November 30.

Definitions 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 Kiruna typically lasts for 2.8 months (86 days), from around June 4 to around August 29, rarely starting before May 18 or after June 20, and rarely ending before August 8 or after September 19.

The fall in Kiruna is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season rapidly decreasing from 42% to -0% over the course of the season.

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 Kiruna are essentially constant during the fall, remaining within 9°F of 400°F throughout.

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 in Kiruna is very rapidly decreasing during the fall, falling by 2.7 kWh, from 2.7 kWh to 0.0 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Kiruna are 67.856 deg latitude, 20.225 deg longitude, and 1,742 ft elevation.

The topography within 2 miles of Kiruna contains very significant variations in elevation, with a maximum elevation change of 889 feet and an average elevation above sea level of 1,719 feet. Within 10 miles also contains very significant variations in elevation (1,509 feet). Within 50 miles contains very significant variations in elevation (6,152 feet).

The area within 2 miles of Kiruna is covered by artificial surfaces (58%) and trees (19%), within 10 miles by trees (62%) and herbaceous vegetation (14%), and within 50 miles by trees (44%) and shrubs (26%).