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December Weather in Ólafsvík Iceland

Daily high temperatures decrease by 2°F, from 40°F to 37°F, rarely falling below 30°F or exceeding 47°F.

Daily low temperatures decrease by 2°F, from 34°F to 31°F, rarely falling below 23°F or exceeding 41°F.

For reference, on July 31, the hottest day of the year, temperatures in Ólafsvík typically range from 48°F to 54°F, while on March 7, the coldest day of the year, they range from 30°F to 37°F.

Average High and Low Temperature in December in Ólafsvík

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 December. 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 December in Ólafsvík

Average Hourly Temperature in December in ÓlafsvíkDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMNovJanvery 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.

Unalaska, Alaska, United States (4,002 miles away) is the far-away foreign place with temperatures most similar to Ólafsvík (view comparison).

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The month of December in Ólafsvík experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 73% to 77%.

The clearest day of the month is December 3, with clear, mostly clear, or partly cloudy conditions 28% of the time.

For reference, on January 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 80%, while on May 21, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 43%.

Cloud Cover Categories in December in Ólafsvík

Cloud Cover Categories in December in ÓlafsvíkDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%NovJanDec 127%Dec 127%Dec 3123%Dec 3123%Dec 1125%Dec 1125%Dec 2124%Dec 2124%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. In Ólafsvík, the chance of a wet day over the course of December is essentially constant, remaining around 48% throughout.

For reference, the year's highest daily chance of a wet day is 50% on February 24, and its lowest chance is 22% on June 17.

Over the course of December in Ólafsvík, the chance of a day with only rain decreases from 39% to 32%, the chance of a day with mixed snow and rain increases from 6% to 8%, and the chance of a day with only snow increases from 2% to 5%.

Probability of Precipitation in December in Ólafsvík

Probability of Precipitation in December in ÓlafsvíkDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%45%45%50%50%55%55%NovJanDec 147%Dec 147%Dec 3146%Dec 3146%Dec 1149%Dec 1149%Dec 2148%Dec 2148%snowmixedrain
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 December in Ólafsvík is essentially constant, remaining about 3.8 inches throughout, and rarely exceeding 6.3 inches or falling below 1.6 inches.

The highest average 31-day accumulation is 3.9 inches on December 5.

Average Monthly Rainfall in December in Ólafsvík

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.

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 December in Ólafsvík is increasing, starting the month at 2.9 inches, when it rarely exceeds 8.3 inches, and ending the month at 5.6 inches, when it rarely exceeds 13.7 inches or falls below 0.1 inches.

Average Monthly Snowfall in December in Ólafsvík

Average Monthly Snowfall in December in ÓlafsvíkDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 in14 in14 in16 in16 in18 in18 inNovJanDec 12.9 inDec 12.9 inDec 315.6 inDec 315.6 inDec 113.9 inDec 113.9 inDec 214.8 inDec 214.8 in
The average snowfall (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 rainfall.

Over the course of December in Ólafsvík, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 41 minutes, implying an average daily decrease of 1 minute, 23 seconds, and weekly decrease of 9 minutes, 39 seconds.

The shortest day of the month is December 21, with 3 hours, 39 minutes of daylight and the longest day is December 1, with 4 hours, 38 minutes of daylight.

Hours of Daylight and Twilight in December in Ólafsvík

Hours of Daylight and Twilight in December in ÓlafsvíkDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrNovJanDec 213 hr, 39 minDec 213 hr, 39 minnightnightDec 14 hr, 38 minDec 14 hr, 38 min
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 in Ólafsvík is 11:04 AM on December 1 and the latest sunrise is 39 minutes later at 11:44 AM on December 24.

The latest sunset is 3:42 PM on December 1 and the earliest sunset is 21 minutes earlier at 3:21 PM on December 18.

Daylight saving time is not observed in Ólafsvík during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 2:39 AM and sets 21 hours, 54 minutes later, at 12:33 AM, while on December 21, the shortest day of the year, it rises at 11:43 AM and sets 3 hours, 39 minutes later, at 3:22 PM.

Sunrise & Sunset with Twilight in December in Ólafsvík

Sunrise & Sunset with Twilight in December in ÓlafsvíkDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMNovJan11:04 AM11:04 AMDec 13:42 PMDec 13:42 PM11:41 AM11:41 AMDec 183:21 PMDec 183:21 PM11:40 AM11:40 AMDec 313:36 PMDec 313:36 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of December. 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 December in Ólafsvík

Solar Elevation and Azimuth in December in ÓlafsvíkDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMNovJan00000
northeastsouthwest
Solar elevation and azimuth over the course of December 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 December 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 December in Ólafsvík

Moon Rise, Set & Phases in December in ÓlafsvíkDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNovJanNov 112:48 PMNov 112:48 PMNov 159:29 PMNov 159:29 PMDec 159:02 AMDec 159:02 AMJan 1310:28 PMJan 1310:28 PMJan 2912:37 PMJan 2912:37 PM9:49 AM9:49 AM4:24 PM4:24 PM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM12:00 AM11:42 AM11:42 AM4:25 PM4:25 PM
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.
Dec 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
0%1:32 PMS245,662 mi
2
2%2:30 PMS243,589 mi
3
6%3:29 PMS241,457 mi
4
12%4:28 PMS239,309 mi
5
20%3:30 PMSSE7:19 PMSSW-5:24 PMS237,165 mi
6
30%3:03 PMSE9:34 PMSW-6:18 PMS235,042 mi
7
41%2:47 PMESE11:32 PMWSW-7:08 PMS232,973 mi
8
50%2:34 PMESE--7:56 PMS231,024 mi
9
64%-1:25 AMW2:22 PME8:43 PMS229,304 mi
10
75%-3:16 AMW2:10 PMENE9:30 PMS227,962 mi
11
85%-5:13 AMWNW1:56 PMENE10:20 PMS227,168 mi
12
92%-7:20 AMNW1:39 PMNE11:13 PMS227,090 mi
13
95%-9:51 AMNNW1:06 PMNNE--
14
98%12:10 AMS227,845 mi
15
100%1:10 AMS229,471 mi
16
99%2:11 AMS231,891 mi
17
96%3:10 AMS234,922 mi
18
91%-2:32 PMNNW6:53 PMNNE4:04 AMS238,303 mi
19
83%-2:09 PMNW8:55 PMNE4:54 AMS241,735 mi
20
75%-1:54 PMWNW10:41 PMENE5:39 AMS244,934 mi
21
66%-1:42 PMWNW-6:21 AMS247,650 mi
22
50%12:18 AME1:31 PMW-7:00 AMS249,693 mi
23
46%1:50 AME1:21 PMW-7:39 AMS250,940 mi
24
37%3:22 AMESE1:10 PMWSW-8:18 AMS251,335 mi
25
28%4:58 AMESE12:57 PMSW-8:59 AMS250,895 mi
26
20%6:43 AMSE12:41 PMSW-9:42 AMS249,699 mi
27
12%8:46 AMSSE12:14 PMSSW-10:30 AMS247,879 mi
28
6%11:22 AMS245,610 mi
29
2%12:19 PMS243,089 mi
30
0%1:19 PMS240,518 mi
31
0%2:19 PMS238,079 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 in Ólafsvík is essentially constant during December, remaining around 0% throughout.

Humidity Comfort Levels in December in Ólafsvík

Humidity Comfort Levels in December in ÓlafsvíkDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%NovJanDec 10%Dec 10%Dec 310%Dec 310%Dec 110%Dec 110%Dec 210%Dec 210%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 in Ólafsvík is increasing during December, increasing from 19.9 miles per hour to 21.3 miles per hour over the course of the month.

For reference, on January 7, the windiest day of the year, the daily average wind speed is 21.4 miles per hour, while on June 21, the calmest day of the year, the daily average wind speed is 11.7 miles per hour.

Average Wind Speed in December in Ólafsvík

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 in Ólafsvík throughout December is predominantly from the east, with a peak proportion of 36% on December 22.

Wind Direction in December in Ólafsvík

Wind Direction in December in ÓlafsvíkDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%NovJansoutheastnorthwest
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).

Ólafsvík 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 in Ólafsvík is essentially constant during December, remaining within 1°F of 42°F throughout.

Average Water Temperature in December in Ólafsvík

Average Water Temperature in December in ÓlafsvíkDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313138°F38°F39°F39°F40°F40°F41°F41°F42°F42°F43°F43°F44°F44°F45°F45°F46°F46°F47°F47°FNovJanDec 143°FDec 143°FDec 3141°FDec 3141°FDec 1142°FDec 1142°FDec 2142°FDec 2142°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 in Ólafsvík typically lasts for 5.7 months (174 days), from around April 30 to around October 21, rarely starting before April 13 or after May 17, and rarely ending before September 28 or after November 14.

The month of December in Ólafsvík is reliably fully outside of the growing season.

Time Spent in Various Temperature Bands and the Growing Season in December in Ólafsvík

Time Spent in Various Temperature Bands and the Growing Season in December in ÓlafsvíkDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%NovJan-0%Dec 16-0%Dec 16Nov 1410%Nov 1410%freezingvery coldcold
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 in Ólafsvík are essentially constant during December, remaining around 124°F throughout.

Growing Degree Days in December in Ólafsvík

The average growing degree days accumulated over the course of December, 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 in Ólafsvík is essentially constant during December, remaining around 0.0 kWh throughout.

The lowest average daily incident shortwave solar energy during December is 0.0 kWh on December 22.

Average Daily Incident Shortwave Solar Energy in December in Ólafsvík

Average Daily Incident Shortwave Solar Energy in December in ÓlafsvíkDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 kWh0.0 kWh0.1 kWh0.1 kWh0.2 kWh0.2 kWh0.3 kWh0.3 kWh0.4 kWh0.4 kWh0.5 kWh0.5 kWh0.6 kWh0.6 kWh0.7 kWh0.7 kWhNovJanDec 220.0 kWhDec 220.0 kWhDec 10.1 kWhDec 10.1 kWhDec 110.0 kWhDec 110.0 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 Ólafsvík are 64.894 deg latitude, -23.709 deg longitude, and 52 ft elevation.

The topography within 2 miles of Ólafsvík contains very significant variations in elevation, with a maximum elevation change of 1,575 feet and an average elevation above sea level of 382 feet. Within 10 miles contains very significant variations in elevation (4,701 feet). Within 50 miles also contains extreme variations in elevation (4,678 feet).

The area within 2 miles of Ólafsvík is covered by shrubs (40%), water (38%), and sparse vegetation (17%), within 10 miles by water (45%) and shrubs (30%), and within 50 miles by water (82%).

This report illustrates the typical weather in Ólafsvík, 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 Ólafsvík.

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

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Ólafsvík and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

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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