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August Weather at Bjornoya Svalbard & Jan Mayen

Daily high temperatures decrease by 2°F, from 45°F to 43°F, rarely falling below 37°F or exceeding 50°F. The highest daily average high temperature is 45°F on August 2.

Daily low temperatures are around 39°F, rarely falling below 34°F or exceeding 44°F. The highest daily average low temperature is 40°F on August 7.

For reference, on August 1, the hottest day of the year, temperatures at Bjornoya typically range from 40°F to 45°F, while on February 7, the coldest day of the year, they range from 18°F to 26°F.

Average High and Low Temperature in August at Bjornoya

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 temperatures for the quarter of the year centered on August. 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 August at Bjornoya

Average Hourly Temperature in August at BjornoyaAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMJulSepvery cold
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.

King Cove, Alaska, United States (3,487 miles away); Diamond Ridge, Alaska, United States (3,158 miles); and Petropavlovsk-Kamchatsky, Russia (3,432 miles) are the far-away foreign places with temperatures most similar to Bjornoya (view comparison).

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The month of August at Bjornoya experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 85% to 81%.

The clearest day of the month is August 29, with clear, mostly clear, or partly cloudy conditions 20% of the time.

For reference, on January 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 91%, while on May 27, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 30%.

Cloud Cover Categories in August at Bjornoya

Cloud Cover Categories in August at BjornoyaAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSepAug 115%Aug 115%Aug 3119%Aug 3119%Aug 1117%Aug 1117%Aug 2119%Aug 2119%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 Bjornoya, the chance of a wet day over the course of August is increasing, starting the month at 15% and ending it at 19%.

For reference, the year's highest daily chance of a wet day is 27% on January 17, and its lowest chance is 10% on June 4.

Probability of Precipitation in August at Bjornoya

Probability of Precipitation in August at BjornoyaAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%2%2%4%4%6%6%8%8%10%10%12%12%14%14%16%16%18%18%20%20%22%22%24%24%JulSepAug 115%Aug 115%Aug 3119%Aug 3119%Aug 1114%Aug 1114%Aug 2114%Aug 2114%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 month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during August at Bjornoya is essentially constant, remaining about 0.9 inches throughout, and rarely exceeding 1.9 inches or falling below 0.2 inches.

Average Monthly Rainfall in August at Bjornoya

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, Bjornoya 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.

In the summer at Bjornoya during 2024, the Sun is continuously above the horizon for 3.5 months, rising at 1:08 AM on April 29, and not setting again until 12:31 AM on August 13. As such, August begins the month in polar day, which ends before the month is out.

The shortest day of the month is August 31, with 16 hours, 47 minutes of daylight.

Hours of Daylight and Twilight in August at Bjornoya

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 month at Bjornoya is 1:07 AM on August 13 and the latest sunrise is 3 hours, 10 minutes later at 4:18 AM on August 31.

The latest sunset is 12:31 AM on August 12 and the earliest sunset is 3 hours, 26 minutes earlier at 9:05 PM on August 31.

Daylight saving time is observed at Bjornoya during 2024, but it neither starts nor ends during August, so the entire month is in standard time.

Sunrise & Sunset with Twilight in August at Bjornoya

Sunrise & Sunset with Twilight in August at BjornoyaAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJulSep12:31 AMAug 1212:31 AMAug 121:07 AM1:07 AM4:18 AM4:18 AM9:05 PMAug 319:05 PMAug 313:05 AM3:05 AMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of August. 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 August at Bjornoya

Solar Elevation and Azimuth in August at BjornoyaAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMJulSep01010202030001010202030
northeastsouthwest
Solar elevation and azimuth over the course of August 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 August 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 August at Bjornoya

Moon Rise, Set & Phases in August at BjornoyaAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMJulSepJul 612:58 AMJul 612:58 AMAug 41:14 PMAug 41:14 PMAug 198:26 PMAug 198:26 PMSep 33:56 AMSep 33:56 AMSep 184:35 AMSep 184:35 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM11:44 PM11:44 PM4:20 AM4:20 AM8:37 PM8:37 PM7:39 PM7:39 PM6:11 AM6:11 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.
Aug 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
10%10:14 AMS240,108 mi
2
5%11:07 AMS242,335 mi
3
1%11:57 AMS244,499 mi
4
0%12:45 PMS246,548 mi
5
1%1:29 PMS248,404 mi
6
4%-12:22 AMNNW4:09 AMNNE10:59 PMNW2:10 PMS249,968 mi
7
9%6:59 AMENE10:09 PMWNW-2:49 PMS251,127 mi
8
15%9:14 AME9:26 PMW-3:28 PMS251,758 mi
9
23%11:26 AMESE8:40 PMWSW-4:06 PMS251,748 mi
10
31%1:53 PMSE7:38 PMSW-4:47 PMS251,008 mi
11
41%5:29 PMS249,488 mi
12
50%6:16 PMS247,194 mi
13
61%7:08 PMS244,199 mi
14
71%8:05 PMS240,654 mi
15
80%9:08 PMS236,793 mi
16
89%10:13 PMS232,921 mi
17
95%11:18 PMS229,387 mi
18
97%--
19
100%11:44 PMSSE--12:20 AMS226,533 mi
20
100%-2:53 AMSSW9:58 PMSE1:18 AMS224,630 mi
21
98%-6:33 AMWSW8:59 PME2:12 AMS223,835 mi
22
93%-9:26 AMW8:05 PMENE3:03 AMS224,169 mi
23
85%-12:26 PMNW6:57 PMNE3:51 AMS225,524 mi
24
75%4:40 AMS227,693 mi
25
64%5:30 AMS230,419 mi
26
50%6:22 AMS233,439 mi
27
41%7:15 AMS236,526 mi
28
30%8:10 AMS239,504 mi
29
21%9:03 AMS242,257 mi
30
13%9:54 AMS244,721 mi
31
7%10:42 AMS246,870 mi

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 Bjornoya is essentially constant during August, remaining around 0% throughout.

Humidity Comfort Levels in August at Bjornoya

Humidity Comfort Levels in August at BjornoyaAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%JulSepAug 160%Aug 160%Aug 10%Aug 10%Aug 310%Aug 310%drydry
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 Bjornoya is increasing during August, increasing from 11.8 miles per hour to 13.1 miles per hour over the course of the month.

For reference, on January 23, the windiest day of the year, the daily average wind speed is 21.0 miles per hour, while on July 26, the calmest day of the year, the daily average wind speed is 11.7 miles per hour.

Average Wind Speed in August at Bjornoya

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 Bjornoya throughout August is predominantly from the east, with a peak proportion of 32% on August 26.

Wind Direction in August at Bjornoya

Wind Direction in August at BjornoyaWEAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%JulSepwestsoutheastnorth
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).

Bjornoya 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 surface water temperature at Bjornoya is essentially constant during August, remaining around 41°F throughout.

The highest average surface water temperature during August is 41°F on August 6.

Average Water Temperature in August at Bjornoya

Average Water Temperature in August at BjornoyaAug112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313136°F36°F37°F37°F38°F38°F39°F39°F40°F40°F41°F41°F42°F42°F43°F43°F44°F44°FJulSepAug 641°FAug 641°FAug 3141°FAug 3141°FAug 2141°FAug 2141°F
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

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 Bjornoya typically lasts for 3.0 months (91 days), from around June 21 to around September 20, rarely starting before May 31 or after July 13, and rarely ending before August 28 or after October 10.

The month of August at Bjornoya 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 98% on August 5.

Time Spent in Various Temperature Bands and the Growing Season in August at Bjornoya

Time Spent in Various Temperature Bands and the Growing Season in August at Bjornoyagrowing seasonAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSep98%Aug 198%Aug 187%Aug 3187%Aug 3198%Aug 1198%Aug 1194%Aug 2194%Aug 2150%Sep 2050%Sep 2090%Jul 1390%Jul 13very coldcoldfreezing
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 Bjornoya are essentially constant during August, remaining within 1°F of 4°F throughout.

Growing Degree Days in August at Bjornoya

The average growing degree days accumulated over the course of August, 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 Bjornoya is decreasing during August, falling by 1.3 kWh, from 3.1 kWh to 1.7 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in August at Bjornoya

Average Daily Incident Shortwave Solar Energy in August at BjornoyaAug11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhJulSepAug 13.1 kWhAug 13.1 kWhAug 311.7 kWhAug 311.7 kWhAug 112.7 kWhAug 112.7 kWhAug 212.3 kWhAug 212.3 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 Bjornoya are 74.517 deg latitude, 19.017 deg longitude, and 0 ft elevation.

The topography within 2 miles of Bjornoya contains only modest variations in elevation, with a maximum elevation change of 161 feet and an average elevation above sea level of 22 feet. Within 10 miles contains only modest variations in elevation (1,673 feet). Within 50 miles also contains very significant variations in elevation (1,706 feet).

The area within 2 miles of Bjornoya is covered by water (59%), sparse vegetation (29%), and snow and glaciers (11%), within 10 miles by water (78%) and sparse vegetation (17%), and within 50 miles by water (99%).

This report illustrates the typical weather at Bjornoya, 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

Bjornoya 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.

There are no other weather stations in our network within 200 kilometers of this location. Consequently, in the case of missing or erroneous measurements from this station, we fall back on NASA's MERRA-2 modern-era reanalysis , adjusted according to typical seasonal and diurnal differences between this station and the wide-area MERRA-2 reconstructed values.

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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