Climate and Average Weather Year Round in Heimbach Germany

In Heimbach, the summers are comfortable and partly cloudy and the winters are long, very cold, windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 30°F to 72°F and is rarely below 18°F or above 83°F.

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

The warm season lasts for 3.1 months, from June 5 to September 8, with an average daily high temperature above 65°F. The hottest month of the year in Heimbach is July, with an average high of 70°F and low of 54°F.

The cold season lasts for 3.7 months, from November 17 to March 8, with an average daily high temperature below 45°F. The coldest month of the year in Heimbach is January, with an average low of 31°F and high of 39°F.

In Heimbach, 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 Heimbach begins around March 29 and lasts for 6.4 months, ending around October 9.

The clearest month of the year in Heimbach 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 9 and lasts for 5.6 months, ending around March 29.

The cloudiest month of the year in Heimbach is December, during which on average the sky is overcast or mostly cloudy 76% of the time.

Heimbach does not experience significant seasonal variation in the frequency of wet days (i.e., those with greater than 0.04 inches of liquid or liquid-equivalent precipitation). The frequency ranges from 26% to 36%, with an average value of 31%.

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 Heimbach is June, with an average of 10.3 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 36% on June 11.

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. Heimbach experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Heimbach. The month with the most rain in Heimbach is June, with an average rainfall of 2.4 inches.

The month with the least rain in Heimbach is February, with an average rainfall of 1.6 inches.

Snowfall

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

The snowy period of the year lasts for 3.5 months, from November 23 to March 8, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Heimbach is December, with an average snowfall of 1.9 inches.

The snowless period of the year lasts for 8.5 months, from March 8 to November 23. The least snow falls around July 31, with an average total accumulation of 0.0 inches.

The length of the day in Heimbach varies extremely over the course of the year. In 2024, the shortest day is December 21, with 7 hours, 58 minutes of daylight; the longest day is June 20, with 16 hours, 29 minutes of daylight.

The earliest sunrise is at 5:20 AM on June 16, and the latest sunrise is 3 hours, 15 minutes later at 8:35 AM on December 30. The earliest sunset is at 4:29 PM on December 12, and the latest sunset is 5 hours, 22 minutes later at 9:50 PM on June 25.

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

The windier part of the year lasts for 5.6 months, from October 15 to April 2, with average wind speeds of more than 10.8 miles per hour. The windiest month of the year in Heimbach is January, with an average hourly wind speed of 13.1 miles per hour.

The calmer time of year lasts for 6.4 months, from April 2 to October 15. The calmest month of the year in Heimbach is August, with an average hourly wind speed of 8.8 miles per hour.

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

The wind is most often from the south for 1.6 weeks, from January 2 to January 13 and for 2.5 months, from October 1 to December 16, with a peak percentage of 45% on October 30. The wind is most often from the west for 8.6 months, from January 13 to October 1 and for 2.4 weeks, from December 16 to January 2, with a peak percentage of 47% on July 6.

To characterize how pleasant the weather is in Heimbach 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 Heimbach for general outdoor tourist activities is from late June to late 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 Heimbach for hot-weather activities is from mid July to mid 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 Heimbach typically lasts for 6.3 months (193 days), from around April 20 to around October 30, rarely starting before April 2 or after May 8, and rarely ending before October 10 or after November 27.

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 Heimbach should appear around April 30, only rarely appearing before April 16 or after May 14.

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 3.6 months, from April 30 to August 18, with an average daily incident shortwave energy per square meter above 5.2 kWh. The brightest month of the year in Heimbach is June, with an average of 6.3 kWh.

The darker period of the year lasts for 3.7 months, from October 26 to February 17, with an average daily incident shortwave energy per square meter below 1.8 kWh. The darkest month of the year in Heimbach is December, with an average of 0.7 kWh.

For the purposes of this report, the geographical coordinates of Heimbach are 50.637 deg latitude, 6.469 deg longitude, and 738 ft elevation.

The topography within 2 miles of Heimbach contains very significant variations in elevation, with a maximum elevation change of 1,122 feet and an average elevation above sea level of 1,089 feet. Within 10 miles also contains very significant variations in elevation (1,647 feet). Within 50 miles contains very significant variations in elevation (3,094 feet).

The area within 2 miles of Heimbach is covered by trees (67%) and cropland (16%), within 10 miles by trees (41%) and cropland (35%), and within 50 miles by cropland (35%) and trees (31%).