Climate and Average Weather Year Round in Valderøy Norway

In Valderøy, the summers are short, cool, and mostly cloudy; the winters are long, very cold, windy, and overcast; and it is wet year round. Over the course of the year, the temperature typically varies from 33°F to 62°F and is rarely below 24°F or above 70°F.

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

The warm season lasts for 2.7 months, from June 22 to September 13, with an average daily high temperature above 58°F. The hottest month of the year in Valderøy is August, with an average high of 61°F and low of 53°F.

The cool season lasts for 4.4 months, from November 19 to April 1, with an average daily high temperature below 44°F. The coldest month of the year in Valderøy is February, with an average low of 33°F and high of 40°F.

In Valderøy, 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 Valderøy begins around April 5 and lasts for 6.3 months, ending around October 13.

The clearest month of the year in Valderøy is May, during which on average the sky is clear, mostly clear, or partly cloudy 44% of the time.

The cloudier part of the year begins around October 13 and lasts for 5.7 months, ending around April 5.

The cloudiest month of the year in Valderøy is January, during which on average the sky is overcast or mostly cloudy 77% 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 Valderøy varies throughout the year.

The wetter season lasts 7.3 months, from August 13 to March 21, with a greater than 48% chance of a given day being a wet day. The month with the most wet days in Valderøy is December, with an average of 18.6 days with at least 0.04 inches of precipitation.

The drier season lasts 4.7 months, from March 21 to August 13. The month with the fewest wet days in Valderøy is May, with an average of 11.1 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. The month with the most days of rain alone in Valderøy is September, with an average of 16.3 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 56% on September 25.

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. Valderøy experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Valderøy. The month with the most rain in Valderøy is December, with an average rainfall of 5.9 inches.

The month with the least rain in Valderøy is May, with an average rainfall of 2.8 inches.

Snowfall

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

The snowy period of the year lasts for 4.7 months, from November 20 to April 9, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Valderøy is February, with an average snowfall of 3.7 inches.

The snowless period of the year lasts for 7.3 months, from April 9 to November 20. The least snow falls around July 25, with an average total accumulation of 0.0 inches.

The length of the day in Valderøy varies extremely over the course of the year. In 2024, the shortest day is December 21, with 4 hours, 56 minutes of daylight; the longest day is June 20, with 20 hours, 1 minute of daylight.

The earliest sunrise is at 3:36 AM on June 19, and the latest sunrise is 6 hours, 30 minutes later at 10:06 AM on December 25. The earliest sunset is at 3:00 PM on December 17, and the latest sunset is 8 hours, 37 minutes later at 11:37 PM on June 22.

Daylight saving time (DST) is observed in Valderøy 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 Valderøy, 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 Valderøy experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 6.0 months, from October 8 to April 6, with average wind speeds of more than 10.3 miles per hour. The windiest month of the year in Valderøy is January, with an average hourly wind speed of 13.5 miles per hour.

The calmer time of year lasts for 6.0 months, from April 6 to October 8. The calmest month of the year in Valderøy is July, with an average hourly wind speed of 7.2 miles per hour.

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

The wind is most often from the north for 3.1 months, from May 12 to August 14, with a peak percentage of 46% on June 15. The wind is most often from the south for 8.9 months, from August 14 to May 12, with a peak percentage of 52% on January 1.

Valderøy 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 2.6 months, from July 10 to September 27, with an average temperature above 54°F. The month of the year in Valderøy with the warmest water is August, with an average temperature of 57°F.

The time of year with cooler water lasts for 4.4 months, from December 27 to May 6, with an average temperature below 45°F. The month of the year in Valderøy with the coolest water is March, with an average temperature of 42°F.

To characterize how pleasant the weather is in Valderøy 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 Valderøy for general outdoor tourist activities is from early July to mid August, with a peak score in the first week of August.

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 Valderøy for hot-weather activities is from late July to mid August, with a peak score in the first week of August.

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 Valderøy typically lasts for 7.1 months (217 days), from around April 11 to around November 14, rarely starting before March 21 or after May 3, and rarely ending before October 15 or after December 15.

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 Valderøy should appear around June 10, only rarely appearing before May 25 or after July 1.

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 3.0 months, from May 3 to August 5, with an average daily incident shortwave energy per square meter above 4.4 kWh. The brightest month of the year in Valderøy is June, with an average of 5.4 kWh.

The darker period of the year lasts for 4.7 months, from October 11 to March 2, with an average daily incident shortwave energy per square meter below 1.2 kWh. The darkest month of the year in Valderøy is December, with an average of 0.1 kWh.

For the purposes of this report, the geographical coordinates of Valderøy are 62.501 deg latitude, 6.135 deg longitude, and 33 ft elevation.

The topography within 2 miles of Valderøy contains significant variations in elevation, with a maximum elevation change of 722 feet and an average elevation above sea level of 41 feet. Within 10 miles contains significant variations in elevation (2,559 feet). Within 50 miles contains large variations in elevation (6,033 feet).

The area within 2 miles of Valderøy is covered by water (67%) and artificial surfaces (15%), within 10 miles by water (65%) and trees (10%), and within 50 miles by water (58%) and trees (14%).