Climate and Average Weather Year Round in Mehamn Norway

In Mehamn, 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 18°F to 57°F and is rarely below 7°F or above 69°F.

Based on the tourism score, the best time of year to visit Mehamn 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 in Mehamn is July, with an average high of 56°F and low of 46°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 in Mehamn is February, with an average low of 19°F and high of 28°F.

In Mehamn, 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 in Mehamn begins around April 16 and lasts for 5.7 months, ending around October 7.

The clearest month of the year in Mehamn is June, during which on average the sky is clear, mostly clear, or partly cloudy 39% 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 in Mehamn 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 in Mehamn varies throughout the year.

The wetter season lasts 3.2 months, from September 26 to January 2, with a greater than 31% chance of a given day being a wet day. The month with the most wet days in Mehamn is October, with an average of 11.8 days with at least 0.04 inches of precipitation.

The drier season lasts 8.8 months, from January 2 to September 26. The month with the fewest wet days in Mehamn is April, with an average of 7.0 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 in Mehamn changes throughout the year.

Rain alone is the most common for 7.0 months, from April 11 to November 11. The month with the most days of rain alone in Mehamn is September, with an average of 8.5 days.

Snow alone is the most common for 5.0 months, from November 11 to April 11. The month with the most days of snow alone in Mehamn is January, with an average of 6.4 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 experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 8.1 months, from April 11 to December 13, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Mehamn is July, with an average rainfall of 2.2 inches.

The rainless period of the year lasts for 3.9 months, from December 13 to April 11. The month with the least rain in Mehamn is January, with an average rainfall of 0.3 inches.

Snowfall

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

The snowy period of the year lasts for 7.5 months, from September 29 to May 14, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Mehamn is January, with an average snowfall of 11.0 inches.

The snowless period of the year lasts for 4.5 months, from May 14 to September 29. The least snow falls around August 3, with an average total accumulation of 0.0 inches.

Due to its extreme latitude, Mehamn 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 in Mehamn during 2024, the Sun is continuously above the horizon for 2.6 months, rising at 12:37 AM on May 11, and not setting again until 11:44 PM on July 31.

In the winter in Mehamn during 2024, the Sun is continuously below the horizon for 2.1 months, setting at 11:25 AM on November 19, and not rising again until 11:06 AM on January 22.

Daylight saving time (DST) is observed in Mehamn 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 in Mehamn, 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 in Mehamn 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 in Mehamn 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 in Mehamn is July, with an average hourly wind speed of 11.0 miles per hour.

The predominant average hourly wind direction in Mehamn 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 19 to August 22; and for 1.7 weeks, from September 29 to October 11, with a peak percentage of 33% on September 29. The wind is most often from the east for 2.3 months, from May 11 to July 19, with a peak percentage of 34% on June 8. The wind is most often from the south for 1.2 months, from August 22 to September 29 and for 6.5 months, from October 11 to April 26, with a peak percentage of 34% on September 12.

Mehamn 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 in Mehamn 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 in Mehamn with the coolest water is March, with an average temperature of 39°F.

To characterize how pleasant the weather is in Mehamn 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 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 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 in Mehamn typically lasts for 4.0 months (123 days), from around May 26 to around September 26, rarely starting before May 6 or after June 15, and rarely ending before September 6 or after October 14.

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 in Mehamn should appear around July 17, only rarely appearing before July 3 or after August 12.

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 in Mehamn 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 in Mehamn is December, with an average of 0.0 kWh.

For the purposes of this report, the geographical coordinates of Mehamn are 71.041 deg latitude, 27.851 deg longitude, and 59 ft elevation.

The topography within 2 miles of Mehamn contains significant variations in elevation, with a maximum elevation change of 755 feet and an average elevation above sea level of 156 feet. Within 10 miles contains significant variations in elevation (1,211 feet). Within 50 miles contains very significant variations in elevation (2,362 feet).

The area within 2 miles of Mehamn is covered by water (42%), sparse vegetation (24%), bare soil (18%), and shrubs (13%), within 10 miles by water (43%) and sparse vegetation (36%), and within 50 miles by water (70%) and sparse vegetation (15%).