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Average Weather in Neskaupstaður Iceland

In Neskaupstaður, the summers are short, cold, and mostly cloudy and the winters are long, chilly, wet, windy, and overcast. Over the course of the year, the temperature typically varies from 27°F to 54°F and is rarely below 16°F or above 61°F.

The warm season lasts for 2.6 months, from June 21 to September 9, with an average daily high temperature above 51°F. The hottest day of the year is August 2, with an average high of 54°F and low of 45°F.

The cold season lasts for 5.1 months, from November 10 to April 13, with an average daily high temperature below 40°F. The coldest day of the year is January 26, with an average low of 27°F and high of 36°F.

Average High and Low Temperature

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 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.

Average Hourly Temperature

Average Hourly Temperature in NeskaupstaðurJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMcoldchillyfreezing
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

In Neskaupstaður, 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 Neskaupstaður begins around April 3 and lasts for 6.4 months, ending around October 14. On May 28, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 37% of the time, and overcast or mostly cloudy 63% of the time.

The cloudier part of the year begins around October 14 and lasts for 5.6 months, ending around April 3. On December 20, the cloudiest day of the year, the sky is overcast or mostly cloudy 76% of the time, and clear, mostly clear, or partly cloudy 24% of the time.

Cloud Cover Categories

Cloud Cover Categories in NeskaupstaðurclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 2837%May 2837%Dec 2024%Dec 2024%Apr 330%Apr 330%Oct 1430%Oct 1430%partly cloudymostly cloudyclearovercastmostly clear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Neskaupstaður varies throughout the year.

The wetter season lasts 6.9 months, from September 4 to March 31, with a greater than 36% chance of a given day being a wet day. The chance of a wet day peaks at 47% on January 5.

The drier season lasts 5.1 months, from March 31 to September 4. The smallest chance of a wet day is 25% on May 31.

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 throughout the year is rain alone, with a peak probability of 45% on October 3.

Daily Chance of Precipitation

Daily Chance of Precipitation in NeskaupstaðurwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 547%Jan 547%May 3125%May 3125%Jan 145%Jan 145%Sep 436%Sep 436%Mar 3136%Mar 3136%snowrainmixed
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 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. Neskaupstaður experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Neskaupstaður. The most rain falls during the 31 days centered around October 4, with an average total accumulation of 4.8 inches.

The least rain falls around April 29, with an average total accumulation of 2.0 inches.

Average Monthly Rainfall

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 liquid-equivalent snowfall.

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. Neskaupstaður experiences significant seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 6.6 months, from October 19 to May 8, 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 26, with an average total liquid-equivalent accumulation of 1.0 inches.

The snowless period of the year lasts for 5.4 months, from May 8 to October 19. The least snow falls around August 5, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in NeskaupstaðursnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in1 in2 in3 in4 in5 inJan 261.0 inJan 261.0 inAug 50.0 inAug 50.0 inOct 190.1 inOct 190.1 inMay 80.1 inMay 80.1 in
The average liquid-equivalent 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.

Sun

The length of the day in Neskaupstaður varies extremely over the course of the year. In 2017, the shortest day is December 21, with 3 hours, 29 minutes of daylight; the longest day is June 21, with 22 hours, 15 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in NeskaupstaðurJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 10 minMar 2012 hr, 10 minMar 2022 hr, 15 minJun 2122 hr, 15 minJun 2112 hr, 18 minSep 2212 hr, 18 minSep 223 hr, 29 minDec 213 hr, 29 minDec 21nightnightday
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 is at 1:48 AM on June 20, and the latest sunrise is 9 hours, 21 minutes later at 11:09 AM on December 24. The earliest sunset is at 2:36 PM on December 18, and the latest sunset is 9 hours, 28 minutes later at 12:04 AM on June 21.

Daylight saving time (DST) is not observed in Neskaupstaður during 2017.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in NeskaupstaðurJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 201:48 AMJun 201:48 AM12:04 AMJun 2112:04 AMJun 21Dec 182:36 PMDec 182:36 PM11:09 AMDec 2411:09 AMDec 24daynightnightnightnight
The solar day over the course of the year 2017. 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.

Humidity

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 Neskaupstaður, 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.

Humidity Comfort Levels

Humidity Comfort Levels in NeskaupstaðurJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 50%Jan 50%Jul 70%Jul 70%drydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Neskaupstaður experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.3 months, from September 20 to April 29, with average wind speeds of more than 6.8 miles per hour. The windiest day of the year is January 9, with an average hourly wind speed of 8.8 miles per hour.

The calmer time of year lasts for 4.7 months, from April 29 to September 20. The calmest day of the year is July 30, with an average hourly wind speed of 4.9 miles per hour.

Average Wind Speed

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Neskaupstaður varies throughout the year.

The wind is most often from the south for 1.4 months, from January 20 to March 2 and for 1.5 months, from July 13 to August 27, with a peak percentage of 37% on August 2. The wind is most often from the north for 4.4 months, from March 2 to July 13 and for 4.8 months, from August 27 to January 20, with a peak percentage of 42% on May 20.

Wind Direction

Wind Direction in NeskaupstaðurNSNSNJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westnorthsoutheast
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Neskaupstaður 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 water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.3 months, from July 12 to September 20, with an average temperature above 45°F. The day of the year with the warmest water is August 15, with an average temperature of 47°F.

The time of year with cooler water lasts for 4.7 months, from December 22 to May 14, with an average temperature below 39°F. The day of the year with the coolest water is March 13, with an average temperature of 38°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 2.7 months, from May 6 to July 29, with an average daily incident shortwave energy per square meter above 4.1 kWh. The brightest day of the year is June 17, with an average of 5.2 kWh.

The darker period of the year lasts for 4.9 months, from October 7 to March 5, with an average daily incident shortwave energy per square meter below 1.1 kWh. The darkest day of the year is December 22, with an average of 0.0 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in NeskaupstaðurbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWhJun 175.2 kWhJun 175.2 kWhDec 220.0 kWhDec 220.0 kWhMay 64.1 kWhMay 64.1 kWhJul 294.1 kWhJul 294.1 kWhOct 71.1 kWhOct 71.1 kWhMar 51.1 kWhMar 51.1 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.

Topography

For the purposes of this report, the geographical coordinates of Neskaupstaður are 65.148 deg latitude, -13.684 deg longitude, and 161 ft elevation.

The topography within 2 miles of Neskaupstaður contains large variations in elevation, with a maximum elevation change of 2,769 feet and an average elevation above sea level of 580 feet. Within 10 miles contains large variations in elevation (3,711 feet). Within 50 miles also contains extreme variations in elevation (4,114 feet).

The area within 2 miles of Neskaupstaður is covered by water (33%), shrubs (24%), and sparse vegetation (20%), within 10 miles by water (36%) and shrubs (34%), and within 50 miles by water (61%) and shrubs (23%).

Data Sources

This report illustrates the typical weather in Neskaupstaður, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Neskaupstaður.

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

The stations contributing to this reconstruction are: Egilsstaðir Airport (85%, 37 kilometers, northwest) and Akurnes Airport (15%, 120 kilometers, southwest).

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.