Climate and Average Weather Year Round in Rosvik Sweden

In Rosvik, the summers are cool and partly cloudy and the winters are long, freezing, snowy, and overcast. Over the course of the year, the temperature typically varies from 8°F to 68°F and is rarely below -12°F or above 76°F.

Based on the tourism score, the best time of year to visit Rosvik for warm-weather activities is from late June to mid August.

The warm season lasts for 3.0 months, from June 2 to September 2, with an average daily high temperature above 59°F. The hottest month of the year in Rosvik is July, with an average high of 67°F and low of 54°F.

The cold season lasts for 3.9 months, from November 17 to March 14, with an average daily high temperature below 31°F. The coldest month of the year in Rosvik is January, with an average low of 9°F and high of 22°F.

In Rosvik, 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 Rosvik begins around April 12 and lasts for 5.4 months, ending around September 23.

The clearest month of the year in Rosvik is July, during which on average the sky is clear, mostly clear, or partly cloudy 50% of the time.

The cloudier part of the year begins around September 23 and lasts for 6.6 months, ending around April 12.

The cloudiest month of the year in Rosvik is January, during which on average the sky is overcast or mostly cloudy 76% 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 Rosvik varies throughout the year.

The wetter season lasts 7.2 months, from May 27 to January 3, with a greater than 23% chance of a given day being a wet day. The month with the most wet days in Rosvik is July, with an average of 9.0 days with at least 0.04 inches of precipitation.

The drier season lasts 4.8 months, from January 3 to May 27. The month with the fewest wet days in Rosvik is March, with an average of 5.5 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 Rosvik changes throughout the year.

Rain alone is the most common for 8.3 months, from March 25 to December 2. The month with the most days of rain alone in Rosvik is July, with an average of 9.0 days.

Snow alone is the most common for 3.7 months, from December 2 to March 25. The month with the most days of snow alone in Rosvik is January, with an average of 4.3 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. Rosvik experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.0 months, from March 25 to December 26, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Rosvik is August, with an average rainfall of 2.6 inches.

The rainless period of the year lasts for 3.0 months, from December 26 to March 25. The month with the least rain in Rosvik is February, 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. Rosvik experiences significant seasonal variation in monthly snowfall.

The snowy period of the year lasts for 6.6 months, from October 9 to April 26, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Rosvik is January, with an average snowfall of 9.1 inches.

The snowless period of the year lasts for 5.5 months, from April 26 to October 9. The least snow falls around August 2, with an average total accumulation of 0.0 inches.

The length of the day in Rosvik varies extremely over the course of the year. In 2024, the shortest day is December 21, with 3 hours, 16 minutes of daylight; the longest day is June 20, with 22 hours, 46 minutes of daylight.

The earliest sunrise is at 1:12 AM on June 20, and the latest sunrise is 8 hours, 42 minutes later at 9:54 AM on December 24. The earliest sunset is at 1:08 PM on December 18, and the latest sunset is 10 hours, 49 minutes later at 11:57 PM on June 20.

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

The windier part of the year lasts for 6.5 months, from September 9 to March 23, with average wind speeds of more than 6.7 miles per hour. The windiest month of the year in Rosvik is December, with an average hourly wind speed of 7.7 miles per hour.

The calmer time of year lasts for 5.5 months, from March 23 to September 9. The calmest month of the year in Rosvik is July, with an average hourly wind speed of 5.7 miles per hour.

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

The wind is most often from the south for 1.0 months, from February 21 to March 21 and for 5.3 months, from April 18 to September 26, with a peak percentage of 37% on July 22. The wind is most often from the west for 4.0 weeks, from March 21 to April 18 and for 4.8 months, from September 26 to February 21, with a peak percentage of 31% on March 23.

Rosvik 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 significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.2 months, from July 4 to September 10, with an average temperature above 54°F. The month of the year in Rosvik with the warmest water is August, with an average temperature of 58°F.

The time of year with cooler water lasts for 5.6 months, from November 28 to May 15, with an average temperature below 37°F. The month of the year in Rosvik with the coolest water is March, with an average temperature of 31°F.

To characterize how pleasant the weather is in Rosvik 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 Rosvik for general outdoor tourist activities is from late June to mid August, with a peak score in the third 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 Rosvik for hot-weather activities is from mid July to early August, with a peak score in the last week of 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 Rosvik typically lasts for 4.3 months (133 days), from around May 12 to around September 22, rarely starting before April 25 or after May 28, and rarely ending before September 6 or after October 8.

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 Rosvik should appear around June 5, only rarely appearing before May 25 or after June 19.

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 2.8 months, from May 10 to August 4, with an average daily incident shortwave energy per square meter above 4.7 kWh. The brightest month of the year in Rosvik is June, with an average of 5.8 kWh.

The darker period of the year lasts for 4.9 months, from October 6 to March 2, with an average daily incident shortwave energy per square meter below 1.2 kWh. The darkest month of the year in Rosvik is December, with an average of 0.0 kWh.

For the purposes of this report, the geographical coordinates of Rosvik are 65.433 deg latitude, 21.700 deg longitude, and 30 ft elevation.

The topography within 2 miles of Rosvik contains only modest variations in elevation, with a maximum elevation change of 200 feet and an average elevation above sea level of 55 feet. Within 10 miles contains only modest variations in elevation (512 feet). Within 50 miles contains significant variations in elevation (1,975 feet).

The area within 2 miles of Rosvik is covered by trees (76%) and water (11%), within 10 miles by trees (60%) and water (30%), and within 50 miles by trees (53%) and water (41%).