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Average Weather in Heidenheim Germany

In Heidenheim, the summers are comfortable and partly cloudy and the winters are freezing, windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 25°F to 73°F and is rarely below 11°F or above 84°F.

Climate Summary

very coldcoldcoolcomfortablecoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDec59%59%28%28%overcastclearprecipitation: 2.8 inprecipitation: 2.8 in1.0 in1.0 inmuggy: 1%muggy: 1%0%0%drydrytourism score: 6.6tourism score: 6.60.00.0
Click on each chart for more information.

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

Temperature

The warm season lasts for 3.4 months, from May 29 to September 10, with an average daily high temperature above 65°F. The hottest day of the year is August 5, with an average high of 73°F and low of 54°F.

The cold season lasts for 3.6 months, from November 17 to March 4, with an average daily high temperature below 42°F. The coldest day of the year is February 9, with an average low of 25°F and high of 36°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature

Average Hourly Temperature in HeidenheimJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfreezingfreezingvery coldvery coldcoldcoldcoolcomfortablefreezingfreezing
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Terrace, Canada (4,910 miles away) is the far-away foreign place with temperatures most similar to Heidenheim (view comparison).

Clouds

In Heidenheim, 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 Heidenheim begins around May 9 and lasts for 4.8 months, ending around October 3. On July 29, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 59% of the time, and overcast or mostly cloudy 41% of the time.

The cloudier part of the year begins around October 3 and lasts for 7.2 months, ending around May 9. On December 7, the cloudiest day of the year, the sky is overcast or mostly cloudy 72% of the time, and clear, mostly clear, or partly cloudy 28% of the time.

Cloud Cover Categories

Cloud Cover Categories in HeidenheimclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2959%Jul 2959%Dec 728%Dec 728%May 944%May 944%Oct 344%Oct 344%clearmostly clearpartly cloudymostly cloudyovercast
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Heidenheim varies throughout the year.

The wetter season lasts 4.0 months, from May 1 to September 1, with a greater than 27% chance of a given day being a wet day. The chance of a wet day peaks at 36% on July 5.

The drier season lasts 8.0 months, from September 1 to May 1. The smallest chance of a wet day is 18% on March 1.

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 throughout the year is rain alone, with a peak probability of 36% on July 5.

Daily Chance of Precipitation

Daily Chance of Precipitation in HeidenheimwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jul 536%Jul 536%Mar 118%Mar 118%Jan 123%Jan 123%May 127%May 127%Sep 127%Sep 127%rainsnow
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

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. Heidenheim experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Heidenheim. The most rain falls during the 31 days centered around July 17, with an average total accumulation of 2.8 inches.

The least rain falls around February 18, with an average total accumulation of 0.8 inches.

Average Monthly Rainfall

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

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

The snowy period of the year lasts for 4.4 months, from November 14 to March 27, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 21, with an average total liquid-equivalent accumulation of 0.3 inches.

The snowless period of the year lasts for 7.6 months, from March 27 to November 14. The least snow falls around July 28, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in HeidenheimsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.5 in1.0 in1.5 in2.0 in2.5 in3.0 inDec 210.3 inDec 210.3 inJul 280.0 inJul 280.0 inNov 140.1 inNov 140.1 inMar 270.1 inMar 270.1 in
The average liquid-equivalent snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.

Sun

The length of the day in Heidenheim varies extremely over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 13 minutes of daylight; the longest day is June 21, with 16 hours, 13 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in HeidenheimJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2016 hr, 13 minJun 2116 hr, 13 minJun 2112 hr, 11 minSep 2212 hr, 11 minSep 228 hr, 13 minDec 218 hr, 13 minDec 21nightnightday
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 5:12 AM on June 16, and the latest sunrise is 2 hours, 59 minutes later at 8:11 AM on December 31. The earliest sunset is at 4:19 PM on December 11, and the latest sunset is 5 hours, 6 minutes later at 9:25 PM on June 25.

Daylight saving time (DST) is observed in Heidenheim during 2017, starting in the spring on March 26, lasting 7.1 months, and ending in the fall on October 29.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in HeidenheimJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 165:12 AMJun 165:12 AM9:25 PMJun 259:25 PMJun 25Dec 114:19 PMDec 114:19 PM8:11 AMDec 318:11 AMDec 31Mar 26DSTMar 26DSTDSTOct 29DSTOct 29daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunset
The solar day over the course of the year 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

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 Heidenheim, 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.

Humidity Comfort Levels

Humidity Comfort Levels in HeidenheimJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 210%Jan 210%Jul 21%Jul 21%humidhumidcomfortablecomfortabledrydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Heidenheim experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.3 months, from November 3 to April 13, with average wind speeds of more than 9.0 miles per hour. The windiest day of the year is January 17, with an average hourly wind speed of 10.7 miles per hour.

The calmer time of year lasts for 6.7 months, from April 13 to November 3. The calmest day of the year is August 8, with an average hourly wind speed of 7.2 miles per hour.

Average Wind Speed

Average Wind Speed in HeidenheimwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mph18 mphJan 1710.7 mphJan 1710.7 mphAug 87.2 mphAug 87.2 mphNov 39.0 mphNov 39.0 mphApr 139.0 mphApr 139.0 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Heidenheim is from the west throughout the year.

Wind Direction

Wind Direction in HeidenheimJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westeastnorthsouth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in Heidenheim 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 Heidenheim for general outdoor tourist activities is from late June to late August, with a peak score in the first week of August.

Tourism Score

Tourism Score in Heidenheimbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.66.60.00.0precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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

Beach/Pool Score

Beach/Pool Score in HeidenheimJanFebMarAprMayJunJulAugSepOctNovDec02468103.53.50.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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.

Growing Season

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 Heidenheim typically lasts for 5.7 months (174 days), from around April 27 to around October 18, rarely starting before April 8 or after May 19, and rarely ending before October 1 or after November 6.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Heidenheimgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Apr 2750%Apr 2750%Oct 1850%Oct 1850%May 1990%May 1990%Oct 190%Oct 190%Apr 810%Apr 810%Nov 610%Nov 610%Jul 27100%Jul 27100%freezingvery coldcoldcoolcomfortablewarmfrigid
The percentage of time spent in various temperature bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The black line is the percentage chance that a given day is within the growing season.

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 Heidenheim should appear around April 30, only rarely appearing before April 17 or after May 15.

Growing Degree Days

Growing Degree Days in HeidenheimJanFebMarAprMayJunJulAugSepOctNovDec0°F200°F400°F600°F800°F1,000°F1,200°F1,400°F1,600°F1,800°FApr 3090°FApr 3090°FJul 25900°FJul 25900°FDec 311,652°FDec 311,652°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 May 1 to August 19, with an average daily incident shortwave energy per square meter above 5.4 kWh. The brightest day of the year is June 30, with an average of 6.6 kWh.

The darker period of the year lasts for 3.6 months, from October 27 to February 15, with an average daily incident shortwave energy per square meter below 2.0 kWh. The darkest day of the year is December 24, with an average of 0.9 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Heidenheim are 49.017 deg latitude, 10.743 deg longitude, and 1,762 ft elevation.

The topography within 2 miles of Heidenheim contains significant variations in elevation, with a maximum elevation change of 633 feet and an average elevation above sea level of 1,891 feet. Within 10 miles contains significant variations in elevation (886 feet). Within 50 miles also contains very significant variations in elevation (1,896 feet).

The area within 2 miles of Heidenheim is covered by cropland (35%), trees (32%), and grassland (31%), within 10 miles by cropland (52%) and trees (26%), and within 50 miles by cropland (51%) and trees (32%).

Data Sources

This report illustrates the typical weather in Heidenheim, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Heidenheim.

For each station, the records are corrected for the elevation difference between that station and Heidenheim according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Heidenheim is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Heidenheim and a given station.

The stations contributing to this reconstruction are: Ansbach / Katterbach (39%, 33 kilometers, north); Roth (34%, 34 kilometers, northeast); Neuburg (21%, 48 kilometers, southeast); and Stuttgart Airport (6%, 117 kilometers, west).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.