Climate and Average Weather Year Round in Surahammar Sweden

In Surahammar, the summers are comfortable and partly cloudy and the winters are long, freezing, snowy, and overcast. Over the course of the year, the temperature typically varies from 19°F to 71°F and is rarely below 1°F or above 80°F.

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

The warm season lasts for 3.3 months, from May 26 to September 4, with an average daily high temperature above 63°F. The hottest month of the year in Surahammar is July, with an average high of 70°F and low of 53°F.

The cold season lasts for 4.0 months, from November 16 to March 15, with an average daily high temperature below 38°F. The coldest month of the year in Surahammar is January, with an average low of 21°F and high of 30°F.

In Surahammar, 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 Surahammar begins around April 6 and lasts for 5.9 months, ending around October 3.

The clearest month of the year in Surahammar is July, during which on average the sky is clear, mostly clear, or partly cloudy 54% of the time.

The cloudier part of the year begins around October 3 and lasts for 6.1 months, ending around April 6.

The cloudiest month of the year in Surahammar is November, 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 Surahammar varies throughout the year.

The wetter season lasts 7.2 months, from May 8 to December 14, with a greater than 25% chance of a given day being a wet day. The month with the most wet days in Surahammar is July, with an average of 9.8 days with at least 0.04 inches of precipitation.

The drier season lasts 4.8 months, from December 14 to May 8. The month with the fewest wet days in Surahammar is March, with an average of 5.7 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 Surahammar changes throughout the year.

Rain alone is the most common for 11 months, from February 14 to January 17. The month with the most days of rain alone in Surahammar is July, with an average of 9.8 days.

Snow alone is the most common for 4.0 weeks, from January 17 to February 14. The month with the most days of snow alone in Surahammar is January, with an average of 2.3 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. Surahammar experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Surahammar. The month with the most rain in Surahammar is July, with an average rainfall of 2.8 inches.

The month with the least rain in Surahammar is February, with an average rainfall of 0.5 inches.

Snowfall

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

The snowy period of the year lasts for 5.7 months, from October 26 to April 18, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Surahammar is January, with an average snowfall of 6.0 inches.

The snowless period of the year lasts for 6.3 months, from April 18 to October 26. The least snow falls around July 24, with an average total accumulation of 0.0 inches.

The length of the day in Surahammar varies extremely over the course of the year. In 2024, the shortest day is December 21, with 5 hours, 58 minutes of daylight; the longest day is June 20, with 18 hours, 46 minutes of daylight.

The earliest sunrise is at 3:33 AM on June 18, and the latest sunrise is 5 hours, 22 minutes later at 8:55 AM on December 27. The earliest sunset is at 2:50 PM on December 15, and the latest sunset is 7 hours, 29 minutes later at 10:19 PM on June 23.

Daylight saving time (DST) is observed in Surahammar 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 Surahammar, 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 Surahammar does not vary significantly over the course of the year, remaining within 0.5 miles per hour of 5.0 miles per hour throughout.

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

The wind is most often from the south for 1.3 months, from April 18 to May 27, with a peak percentage of 29% on May 9. The wind is most often from the west for 11 months, from May 27 to April 18, with a peak percentage of 41% on January 1.

To characterize how pleasant the weather is in Surahammar 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 Surahammar 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 Surahammar for hot-weather activities is from mid July to early August, with a peak score in the third 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 Surahammar typically lasts for 4.6 months (142 days), from around May 9 to around September 28, rarely starting before April 19 or after May 28, and rarely ending before September 10 or after October 20.

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 Surahammar should appear around May 17, only rarely appearing before May 7 or after May 30.

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 3.2 months, from May 3 to August 9, with an average daily incident shortwave energy per square meter above 4.9 kWh. The brightest month of the year in Surahammar is June, with an average of 6.0 kWh.

The darker period of the year lasts for 4.4 months, from October 14 to February 26, with an average daily incident shortwave energy per square meter below 1.4 kWh. The darkest month of the year in Surahammar is December, with an average of 0.2 kWh.

For the purposes of this report, the geographical coordinates of Surahammar are 59.707 deg latitude, 16.222 deg longitude, and 236 ft elevation.

The topography within 2 miles of Surahammar contains only modest variations in elevation, with a maximum elevation change of 154 feet and an average elevation above sea level of 254 feet. Within 10 miles also contains only modest variations in elevation (430 feet). Within 50 miles contains only modest variations in elevation (1,404 feet).

The area within 2 miles of Surahammar is covered by trees (45%), cropland (25%), and artificial surfaces (20%), within 10 miles by trees (71%) and cropland (20%), and within 50 miles by trees (62%) and cropland (23%).