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Summer Weather at Rovaniemi Airport Finland

Daily high temperatures are around 61°F, rarely falling below 45°F or exceeding 76°F. The highest daily average high temperature is 67°F on July 21.

Daily low temperatures are around 48°F, rarely falling below 35°F or exceeding 60°F. The highest daily average low temperature is 53°F on July 23.

For reference, on July 20, the hottest day of the year, temperatures at Rovaniemi Airport typically range from 53°F to 67°F, while on January 21, the coldest day of the year, they range from 6°F to 17°F.

Average High and Low Temperature in the Summer at Rovaniemi Airport

Average High and Low Temperature in the Summer at Rovaniemi AirportJunJulAug20°F20°F25°F25°F30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°FSpringFallJul 2067°FJul 2067°F53°F53°FJun 157°FJun 157°F43°F43°FAug 3156°FAug 3156°F44°F44°FJul 165°FJul 165°F51°F51°FAug 165°FAug 165°F52°F52°F
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 figure below shows you a compact characterization of the hourly average summer 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.

Average Hourly Temperature in the Summer at Rovaniemi Airport

Average Hourly Temperature in the Summer at Rovaniemi AirportJunJulAug12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSpringFallvery coldvery coldcoldcoolcoolcomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Dillingham, Alaska, United States (3,760 miles away); Y, Alaska, United States (3,544 miles); and Maliotenam, Canada (3,174 miles) are the far-away foreign places with temperatures most similar to Rovaniemi Airport (view comparison).

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The summer at Rovaniemi Airport experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 55% to 61%. The lowest chance of overcast or mostly cloudy conditions is 50% on July 8.

The clearest day of the summer is July 8, with clear, mostly clear, or partly cloudy conditions 50% of the time.

For reference, on January 1, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 85%, while on July 8, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 50%.

Cloud Cover Categories in the Summer at Rovaniemi Airport

Cloud Cover Categories in the Summer at Rovaniemi AirportJunJulAug0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SpringFallJan 115%Jan 115%Jun 145%Jun 145%Aug 3139%Aug 3139%Jul 149%Jul 149%Aug 149%Aug 149%clearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Rovaniemi Airport, the chance of a wet day over the course of the summer is essentially constant, remaining around 32% throughout.

For reference, the year's highest daily chance of a wet day is 35% on July 25, and its lowest chance is 15% on March 2.

Probability of Precipitation in the Summer at Rovaniemi Airport

Probability of Precipitation in the Summer at Rovaniemi AirportJunJulAug0%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%SpringFallJul 2535%Jul 2535%Jun 131%Jun 131%Aug 3130%Aug 3130%Jul 134%Jul 134%rainmixed
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).

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 summer at Rovaniemi Airport is essentially constant, remaining about 2.5 inches throughout, and rarely exceeding 4.4 inches or falling below 0.9 inches.

The highest average 31-day accumulation is 2.8 inches on July 16.

Average Monthly Rainfall in the Summer at Rovaniemi Airport

Average Monthly Rainfall in the Summer at Rovaniemi AirportJunJulAug0 in0 in1 in1 in2 in2 in3 in3 in4 in4 inSpringFallJul 162.8 inJul 162.8 inJun 12.2 inJun 12.2 inAug 312.2 inAug 312.2 inJul 12.6 inJul 12.6 inAug 12.7 inAug 12.7 in
The average rainfall (solid line) accumulated over the course of a sliding 31-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.

Due to its extreme latitude, Rovaniemi Airport experiences polar day (also known as the midnight Sun) during the summer. 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.

In the summer at Rovaniemi Airport during 2024, the Sun is continuously above the horizon for 1.0 months, rising at 1:23 AM on June 5, and not setting again until 1:10 AM on July 7. As such, polar day begins and ends during the summer.

The shortest day of the summer is August 31, with 14 hours, 57 minutes of daylight.

Hours of Daylight and Twilight in the Summer at Rovaniemi Airport

Hours of Daylight and Twilight in the Summer at Rovaniemi AirportJunJulAug0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrSpringFall24 hr, 0 minJun 2024 hr, 0 minJun 2014 hr, 57 minAug 3114 hr, 57 minAug 3118 hr, 50 minAug 118 hr, 50 minAug 1
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 earliest sunrise of the summer at Rovaniemi Airport is 1:23 AM on June 5 and the latest sunrise is 4 hours, 23 minutes later at 5:47 AM on August 31.

The latest sunset is 1:10 AM on July 6 and the earliest sunset is 4 hours, 27 minutes earlier at 8:44 PM on August 31.

Daylight saving time is observed at Rovaniemi Airport during 2024, but it neither starts nor ends during the summer, so the entire season is in standard time.

Sunrise & Sunset with Twilight in the Summer at Rovaniemi Airport

Sunrise & Sunset with Twilight in the Summer at Rovaniemi AirportJunJulAug2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMSpringFall1:23 AM1:23 AM1:10 AMJul 61:10 AMJul 65:47 AM5:47 AM8:44 PMAug 318:44 PMAug 3112:30 AMJun 112:30 AMJun 13:56 AM3:56 AM10:46 PMAug 110:46 PMAug 1SolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day in the summer. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

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.

Solar Elevation and Azimuth in the Summer at Rovaniemi Airport

Solar Elevation and Azimuth in the Summer at Rovaniemi AirportJunJulAug12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSpringFall0010202030304001010203040
northeastsouthwest
Solar elevation and azimuth in the the summer of 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

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

Moon Rise, Set & Phases in the Summer at Rovaniemi Airport

Moon Rise, Set & Phases in the Summer at Rovaniemi AirportJunJulAug12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMSpringFallMay 86:23 AMMay 86:23 AMJun 63:38 PMJun 63:38 PMJul 61:58 AMJul 61:58 AMJul 211:18 PMJul 211:18 PMAug 42:14 PMAug 42:14 PMAug 199:26 PMAug 199:26 PMSep 34:56 AMSep 34:56 AMSep 185:35 AMSep 185:35 AM3:28 AM3:28 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM11:22 PM11:22 PM5:28 AM5:28 AM5:52 AM5:52 AM8:39 PM8:39 PM7:44 PM7:44 PM6:54 AM6:54 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

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 at Rovaniemi Airport is essentially constant during the summer, remaining around 0% throughout.

For reference, on July 14, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in the Summer at Rovaniemi Airport

Humidity Comfort Levels in the Summer at Rovaniemi AirportJunJulAug0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%SpringFallJul 140%Jul 140%Jun 10%Jun 10%Aug 310%Aug 310%Jul 10%Jul 10%Aug 10%Aug 10%drydryhumidhumid
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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 Rovaniemi Airport is gradually decreasing during the summer, decreasing from 4.8 miles per hour to 4.3 miles per hour over the course of the season.

For reference, on February 29, the windiest day of the year, the daily average wind speed is 6.0 miles per hour, while on August 4, the calmest day of the year, the daily average wind speed is 4.1 miles per hour.

The lowest daily average wind speed during the summer is 4.1 miles per hour on August 4.

Average Wind Speed in the Summer at Rovaniemi Airport

Average Wind Speed in the Summer at Rovaniemi AirportJunJulAug0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mphSpringFallAug 44.1 mphAug 44.1 mphJun 14.8 mphJun 14.8 mphAug 314.3 mphAug 314.3 mphJul 14.4 mphJul 14.4 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction at Rovaniemi Airport throughout the summer is predominantly from the south, with a peak proportion of 36% on July 23.

Wind Direction in the Summer at Rovaniemi Airport

Wind Direction in the Summer at Rovaniemi AirportJunJulAug0%100%20%80%40%60%60%40%80%20%100%0%SpringFallwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

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 at Rovaniemi Airport typically lasts for 4.1 months (126 days), from around May 17 to around September 21, rarely starting before April 30 or after June 3, and rarely ending before September 2 or after October 9.

The summer at Rovaniemi Airport is more likely than not fully within the growing season, with the chance that a given day is in the growing season reaching a high of 100% on July 21.

Time Spent in Various Temperature Bands and the Growing Season in the Summer at Rovaniemi Airport

Time Spent in Various Temperature Bands and the Growing Season in the Summer at Rovaniemi Airportgrowing seasonJunJulAug0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SpringFall87%Jun 187%Jun 193%Aug 3193%Aug 31100%Jul 1100%Jul 1100%Aug 1100%Aug 150%May 1750%May 1750%Sep 2150%Sep 21Jul 21100%Jul 21100%very coldcoldcoolcomfortablefreezing
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing 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 at Rovaniemi Airport are rapidly increasing during the summer, increasing by 680°F, from 66°F to 746°F, over the course of the season.

Growing Degree Days in the Summer at Rovaniemi Airport

Growing Degree Days in the Summer at Rovaniemi AirportJunJulAug100°F100°F200°F200°F300°F300°F400°F400°F500°F500°F600°F600°F700°F700°F800°F800°F900°F900°FSpringFallJun 166°FJun 166°FAug 31746°FAug 31746°FJul 1256°FJul 1256°FAug 1563°FAug 1563°F
The average growing degree days accumulated over the course of the summer, with 25th to 75th and 10th to 90th percentile bands.

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 at Rovaniemi Airport is very rapidly decreasing during the summer, falling by 2.4 kWh, from 5.3 kWh to 2.9 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the summer is 5.7 kWh on June 25.

Average Daily Incident Shortwave Solar Energy in the Summer at Rovaniemi Airport

Average Daily Incident Shortwave Solar Energy in the Summer at Rovaniemi AirportJunJulAug0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhSpringFallJun 255.7 kWhJun 255.7 kWhJun 15.3 kWhJun 15.3 kWhAug 312.9 kWhAug 312.9 kWhAug 14.6 kWhAug 14.6 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Rovaniemi Airport are 66.565 deg latitude, 25.830 deg longitude, and 646 ft elevation.

The topography within 2 miles of Rovaniemi Airport contains only modest variations in elevation, with a maximum elevation change of 289 feet and an average elevation above sea level of 544 feet. Within 10 miles contains only modest variations in elevation (623 feet). Within 50 miles contains significant variations in elevation (1,706 feet).

The area within 2 miles of Rovaniemi Airport is covered by trees (84%) and artificial surfaces (16%), within 10 miles by trees (82%), and within 50 miles by trees (86%).

This report illustrates the typical weather at Rovaniemi 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

Rovaniemi 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 are Sodankylä Airfield, Kemi-Tornio Airport, Kittilä Airport, Hailuoto, and Pello.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

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.

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