Climate and Average Weather Year Round at Mehamn Airport Norway

At Mehamn Airport, the summers are short, cold, and mostly cloudy and the winters are long, freezing, snowy, extremely windy, and overcast. Over the course of the year, the temperature typically varies from 17°F to 57°F and is rarely below 6°F or above 69°F.

Based on the tourism score, the best time of year to visit Mehamn Airport for warm-weather activities is from mid July to mid August.

The warm season lasts for 2.5 months, from June 21 to September 4, with an average daily high temperature above 51°F. The hottest month of the year at Mehamn Airport is July, with an average high of 56°F and low of 45°F.

The cold season lasts for 4.7 months, from November 18 to April 9, with an average daily high temperature below 33°F. The coldest month of the year at Mehamn Airport is February, with an average low of 18°F and high of 27°F.

At Mehamn Airport, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year at Mehamn Airport begins around April 16 and lasts for 5.7 months, ending around October 7.

The clearest month of the year at Mehamn Airport is June, during which on average the sky is clear, mostly clear, or partly cloudy 40% of the time.

The cloudier part of the year begins around October 7 and lasts for 6.3 months, ending around April 16.

The cloudiest month of the year at Mehamn Airport is January, during which on average the sky is overcast or mostly cloudy 82% of the time.

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

The wetter season lasts 3.9 months, from September 27 to January 23, with a greater than 31% chance of a given day being a wet day. The month with the most wet days at Mehamn Airport is October, with an average of 11.7 days with at least 0.04 inches of precipitation.

The drier season lasts 8.1 months, from January 23 to September 27. The month with the fewest wet days at Mehamn Airport is April, with an average of 7.1 days with at least 0.04 inches of precipitation.

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 at Mehamn Airport changes throughout the year.

Rain alone is the most common for 6.7 months, from April 16 to November 7. The month with the most days of rain alone at Mehamn Airport is September, with an average of 8.4 days.

Snow alone is the most common for 5.3 months, from November 7 to April 16. The month with the most days of snow alone at Mehamn Airport is January, with an average of 6.8 days.

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. Mehamn Airport experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.6 months, from April 14 to December 2, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain at Mehamn Airport is July, with an average rainfall of 2.2 inches.

The rainless period of the year lasts for 4.4 months, from December 2 to April 14. The month with the least rain at Mehamn Airport is January, with an average rainfall of 0.2 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Mehamn Airport experiences extreme seasonal variation in monthly snowfall.

The snowy period of the year lasts for 7.7 months, from September 27 to May 17, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Mehamn Airport is January, with an average snowfall of 11.6 inches.

The snowless period of the year lasts for 4.3 months, from May 17 to September 27. The least snow falls around August 5, with an average total accumulation of 0.0 inches.

Due to its extreme latitude, Mehamn Airport 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 Mehamn Airport during 2024, the Sun is continuously above the horizon for 2.6 months, rising at 12:38 AM on May 11, and not setting again until 11:43 PM on July 31.

In the winter at Mehamn Airport during 2024, the Sun is continuously below the horizon for 2.1 months, setting at 11:26 AM on November 19, and not rising again until 11:03 AM on January 22.

Daylight saving time (DST) is observed at Mehamn Airport during 2024, starting in the spring on March 31, lasting 6.9 months, and ending in the fall on October 27.

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

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 at Mehamn Airport, 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.

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 Mehamn Airport experiences extreme seasonal variation over the course of the year.

The windier part of the year lasts for 6.6 months, from October 1 to April 19, with average wind speeds of more than 14.6 miles per hour. The windiest month of the year at Mehamn Airport is February, with an average hourly wind speed of 18.3 miles per hour.

The calmer time of year lasts for 5.5 months, from April 19 to October 1. The calmest month of the year at Mehamn Airport is July, with an average hourly wind speed of 10.9 miles per hour.

The predominant average hourly wind direction at Mehamn Airport varies throughout the year.

The wind is most often from the west for 2.1 weeks, from April 26 to May 11; for 1.1 months, from July 18 to August 22; and for 1.3 weeks, from September 29 to October 8, with a peak percentage of 33% on September 30. The wind is most often from the east for 2.2 months, from May 11 to July 18, with a peak percentage of 34% on June 6. The wind is most often from the south for 1.2 months, from August 22 to September 29 and for 6.6 months, from October 8 to April 26, with a peak percentage of 34% on September 12.

Mehamn Airport 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 2.2 months, from July 10 to September 18, with an average temperature above 47°F. The month of the year at Mehamn Airport with the warmest water is August, with an average temperature of 49°F.

The time of year with cooler water lasts for 4.5 months, from January 4 to May 19, with an average temperature below 41°F. The month of the year at Mehamn Airport with the coolest water is March, with an average temperature of 39°F.

To characterize how pleasant the weather is at Mehamn Airport throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Mehamn Airport for general outdoor tourist activities is from mid July to mid August, with a peak score in the last week of July.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Mehamn Airport for hot-weather activities is from mid to late July.

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

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 Mehamn Airport typically lasts for 3.8 months (116 days), from around May 30 to around September 23, rarely starting before May 11 or after June 19, and rarely ending before September 3 or after October 12.

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.

Based on growing degree days alone, the first spring blooms at Mehamn Airport should appear around July 19, only rarely appearing before July 5 or after August 17.

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 2.4 months, from May 14 to July 28, with an average daily incident shortwave energy per square meter above 4.2 kWh. The brightest month of the year at Mehamn Airport is June, with an average of 5.1 kWh.

The darker period of the year lasts for 5.7 months, from September 27 to March 16, with an average daily incident shortwave energy per square meter below 1.0 kWh. The darkest month of the year at Mehamn Airport is December, with an average of 0.0 kWh.