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Climate and Average Weather Year Round in Ulm Germany

In Ulm, the summers are comfortable, the winters are very cold and windy, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 26°F to 75°F and is rarely below 13°F or above 86°F.

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

Climate in Ulm

very coldcoldcoolcomfortablecoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow61%61%31%31%clearprecipitation: 3.5 inprecipitation: 3.5 in1.3 in1.3 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 6.7tourism score: 6.70.00.0
Ulm weather by month. Click on each chart for more information.

Average Temperature in Ulm

The warm season lasts for 3.4 months, from May 31 to September 10, with an average daily high temperature above 67°F. The hottest day of the year is August 4, with an average high of 75°F and low of 55°F.

The cold season lasts for 3.6 months, from November 16 to March 4, with an average daily high temperature below 44°F. The coldest day of the year is February 9, with an average low of 26°F and high of 38°F.

Average High and Low Temperature in Ulm

Average High and Low Temperature in UlmwarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FFeb 938°FFeb 938°FAug 475°FAug 475°F26°F26°F55°F55°FMay 3167°FMay 3167°FSep 1067°FSep 1067°FNov 1644°FNov 1644°F49°F49°F49°F49°F34°F34°FNowNow
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 in Ulm

Average Hourly Temperature in UlmJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingfreezingvery coldvery coldcoldcoldcoolcomfortablefreezing
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 average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Hope, Canada (5,094 miles away) is the far-away foreign place with temperatures most similar to Ulm (view comparison).

Compare Ulm to another city:

Clouds

In Ulm, 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 Ulm begins around June 4 and lasts for 3.7 months, ending around September 26. On July 28, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 61% of the time, and overcast or mostly cloudy 40% of the time.

The cloudier part of the year begins around September 26 and lasts for 8.3 months, ending around June 4. On November 23, the cloudiest day of the year, the sky is overcast or mostly cloudy 69% of the time, and clear, mostly clear, or partly cloudy 31% of the time.

Cloud Cover Categories in Ulm

Cloud Cover Categories in UlmclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2861%Jul 2861%Nov 2331%Nov 2331%Jun 446%Jun 446%Sep 2646%Sep 2646%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

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

The wetter season lasts 4.1 months, from April 30 to September 3, with a greater than 32% chance of a given day being a wet day. The chance of a wet day peaks at 42% on June 12.

The drier season lasts 7.9 months, from September 3 to April 30. The smallest chance of a wet day is 23% 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 42% on June 12.

Daily Chance of Precipitation in Ulm

Daily Chance of Precipitation in UlmwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 1242%Jun 1242%Mar 123%Mar 123%Jan 128%Jan 128%Apr 3032%Apr 3032%Sep 332%Sep 332%NowNowrainsnow
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. Ulm experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Ulm. The most rain falls during the 31 days centered around June 4, with an average total accumulation of 3.5 inches.

The least rain falls around February 17, with an average total accumulation of 1.1 inches.

Average Monthly Rainfall in Ulm

Average Monthly Rainfall in UlmJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inJun 43.5 inJun 43.5 inFeb 171.1 inFeb 171.1 inJul 143.5 inJul 143.5 inNowNow
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

The sliding 31-day liquid-equivalent quantity of snowfall in Ulm does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.

Average Liquid-Equivalent Monthly Snowfall in Ulm

Average Liquid-Equivalent Monthly Snowfall in UlmsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 in3.5 in3.5 inJan 10.2 inJan 10.2 inJul 290.0 inJul 290.0 inNov 200.1 inNov 200.1 inMar 170.1 inMar 170.1 inNowNow
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 Ulm varies extremely over the course of the year. In 2021, the shortest day is December 21, with 8 hours, 19 minutes of daylight; the longest day is June 21, with 16 hours, 7 minutes of daylight.

Hours of Daylight and Twilight in Ulm

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 5:18 AM on June 16, and the latest sunrise is 2 hours, 54 minutes later at 8:11 AM on December 31. The earliest sunset is at 4:25 PM on December 11, and the latest sunset is 5 hours, 0 minutes later at 9:25 PM on June 25.

Daylight saving time (DST) is observed in Ulm during 2021, starting in the spring on March 28, lasting 7.1 months, and ending in the fall on October 31.

Sunrise & Sunset with Twilight and Daylight Saving Time in Ulm

Sunrise & Sunset with Twilight and Daylight Saving Time in UlmJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 165:18 AMJun 165:18 AM9:25 PMJun 259:25 PMJun 25Dec 114:25 PMDec 114:25 PM8:11 AMDec 318:11 AMDec 31Mar 28DSTMar 28DSTDSTOct 31DSTOct 31daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunsetNowNow
The solar day over the course of the year 2021. 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.

Moon

The figure below presents a compact representation of key lunar data for 2021. 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.

Moon Rise, Set & Phases in Ulm

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

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 Ulm, 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 in Ulm

Humidity Comfort Levels in UlmJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Mar 150%Mar 150%Jul 20%Jul 20%NowNowhumidhumidcomfortablecomfortabledrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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

The windier part of the year lasts for 5.4 months, from November 3 to April 14, with average wind speeds of more than 8.5 miles per hour. The windiest day of the year is January 28, with an average hourly wind speed of 10.3 miles per hour.

The calmer time of year lasts for 6.6 months, from April 14 to November 3. The calmest day of the year is August 10, with an average hourly wind speed of 6.7 miles per hour.

Average Wind Speed in Ulm

Average Wind Speed in UlmwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mphJan 2810.3 mphJan 2810.3 mphAug 106.7 mphAug 106.7 mphNov 38.5 mphNov 38.5 mphApr 148.5 mphApr 148.5 mphNowNow
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 Ulm is from the west throughout the year.

Wind Direction in Ulm

Wind Direction in UlmJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwesteastnorthsouth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 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 Ulm 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 Ulm for general outdoor tourist activities is from late June to late August, with a peak score in the first week of August.

Tourism Score in Ulm

Tourism Score in Ulmbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.76.70.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Ulm for hot-weather activities is from mid July to mid August, with a peak score in the first week of August.

Beach/Pool Score in Ulm

Beach/Pool Score in UlmJanFebMarAprMayJunJulAugSepOctNovDec002244668810103.93.90.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/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 Ulm typically lasts for 6.1 months (188 days), from around April 21 to around October 25, rarely starting before April 3 or after May 9, and rarely ending before October 5 or after November 16.

Time Spent in Various Temperature Bands and the Growing Season in Ulm

Time Spent in Various Temperature Bands and the Growing Season in Ulmgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 2150%Apr 2150%Oct 2550%Oct 2590%May 990%May 990%Oct 590%Oct 510%Apr 310%Apr 310%Nov 1610%Nov 160%Feb 40%Feb 4Jul 22100%Jul 22100%freezingvery coldcoldcoolcomfortablewarmfrigid
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 percentage of time spent in various temperature bands. 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 Ulm should appear around April 24, only rarely appearing before April 12 or after May 9.

Growing Degree Days in Ulm

Growing Degree Days in UlmJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°FApr 2490°FApr 2490°FJul 17900°FJul 17900°FOct 91,800°FOct 91,800°FDec 311,858°FDec 311,858°FNowNow
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 3.5 months, from May 4 to August 20, with an average daily incident shortwave energy per square meter above 5.5 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 28 to February 15, with an average daily incident shortwave energy per square meter below 2.1 kWh. The darkest day of the year is December 24, with an average of 1.0 kWh.

Average Daily Incident Shortwave Solar Energy in Ulm

Average Daily Incident Shortwave Solar Energy in UlmbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 306.6 kWhJun 306.6 kWhDec 241.0 kWhDec 241.0 kWhMay 45.5 kWhMay 45.5 kWhAug 205.5 kWhAug 205.5 kWhOct 282.1 kWhOct 282.1 kWhFeb 152.1 kWhFeb 152.1 kWhNowNow
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 Ulm are 48.398 deg latitude, 9.992 deg longitude, and 1,575 ft elevation.

The topography within 2 miles of Ulm contains only modest variations in elevation, with a maximum elevation change of 413 feet and an average elevation above sea level of 1,615 feet. Within 10 miles contains only modest variations in elevation (948 feet). Within 50 miles contains very significant variations in elevation (3,094 feet).

The area within 2 miles of Ulm is covered by artificial surfaces (84%), within 10 miles by cropland (59%) and trees (22%), and within 50 miles by cropland (41%) and trees (32%).

Data Sources

This report illustrates the typical weather in Ulm, 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 6 weather stations near enough to contribute to our estimation of the temperature and dew point in Ulm.

For each station, the records are corrected for the elevation difference between that station and Ulm 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 Ulm is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Ulm and a given station.

The stations contributing to this reconstruction are: Laupheim (ETHL, 59%, 21 kilometers, south); Stuttgart Airport (EDDS, 11%, 65 kilometers, northwest); Lechfeld Air Base (ETSL, 10%, 69 kilometers, east); Augsburg Airport (EDMA, 10%, 70 kilometers, east); Niederstetten (ETHN, 5%, 111 kilometers, north); and Ansbach / Katterbach (ETEB, 5.0%, 112 kilometers, northeast).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports 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.