1. WeatherSpark.com
  2. Luxembourg
  3. Wiltz
  4. Wiltz

Average Weather in Wiltz Luxembourg

In Wiltz, the summers are comfortable and partly cloudy and the winters are very cold, windy, and overcast. Over the course of the year, the temperature typically varies from 30°F to 71°F and is rarely below 19°F or above 82°F.

Climate Summary

very coldcoldcoolcomfortablecoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDec58%58%21%21%overcastclearprecipitation: 2.5 inprecipitation: 2.5 in1.8 in1.8 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 6.5tourism score: 6.50.00.0
Click on each chart for more information.

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

Temperature

The warm season lasts for 3.1 months, from June 6 to September 9, with an average daily high temperature above 64°F. The hottest day of the year is August 4, with an average high of 71°F and low of 55°F.

The cold season lasts for 3.7 months, from November 17 to March 8, with an average daily high temperature below 44°F. The coldest day of the year is February 8, with an average low of 30°F and high of 38°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 WiltzJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMvery coldvery coldcoldcoldcoolcomfortablefreezing
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.

West Vancouver, Canada (4,947 miles away) is the far-away foreign place with temperatures most similar to Wiltz (view comparison).

Clouds

In Wiltz, 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 Wiltz begins around March 26 and lasts for 6.4 months, ending around October 7. On July 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 58% of the time, and overcast or mostly cloudy 42% of the time.

The cloudier part of the year begins around October 7 and lasts for 5.6 months, ending around March 26. On November 22, the cloudiest day of the year, the sky is overcast or mostly cloudy 79% of the time, and clear, mostly clear, or partly cloudy 21% of the time.

Cloud Cover Categories

Cloud Cover Categories in WiltzclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2358%Jul 2358%Nov 2221%Nov 2221%Mar 2639%Mar 2639%Oct 739%Oct 739%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 Wiltz varies throughout the year.

The wetter season lasts 8.5 months, from May 8 to January 22, with a greater than 31% chance of a given day being a wet day. The chance of a wet day peaks at 37% on June 12.

The drier season lasts 3.5 months, from January 22 to May 8. The smallest chance of a wet day is 25% on March 3.

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 37% on June 12.

Daily Chance of Precipitation

Daily Chance of Precipitation in WiltzwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jun 1237%Jun 1237%Mar 325%Mar 325%Jan 136%Jan 136%May 831%May 831%Jan 2231%Jan 2231%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. Wiltz experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Wiltz. The most rain falls during the 31 days centered around June 5, with an average total accumulation of 2.5 inches.

The least rain falls around February 23, with an average total accumulation of 1.7 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. Wiltz experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 3.6 months, from November 21 to March 8, 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 24, with an average total liquid-equivalent accumulation of 0.3 inches.

The snowless period of the year lasts for 8.4 months, from March 8 to November 21. The least snow falls around August 4, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in WiltzsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.5 in1.0 in1.5 in2.0 in2.5 inDec 240.3 inDec 240.3 inAug 40.0 inAug 40.0 inMar 80.1 inMar 80.1 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 Wiltz varies extremely over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 5 minutes of daylight; the longest day is June 21, with 16 hours, 22 minutes of daylight.

Hours of Daylight and Twilight

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 5:26 AM on June 16, and the latest sunrise is 3 hours, 8 minutes later at 8:34 AM on December 31. The earliest sunset is at 4:34 PM on December 12, and the latest sunset is 5 hours, 15 minutes later at 9:49 PM on June 25.

Daylight saving time (DST) is observed in Wiltz 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 WiltzJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 165:26 AMJun 165:26 AM9:49 PMJun 259:49 PMJun 25Dec 124:34 PMDec 124:34 PM8:34 AMDec 318:34 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 Wiltz, 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 WiltzJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 280%Jan 280%Jun 300%Jun 300%comfortablecomfortabledrydryhumidhumid
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 Wiltz experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.8 months, from October 15 to April 9, with average wind speeds of more than 10.2 miles per hour. The windiest day of the year is January 17, with an average hourly wind speed of 12.3 miles per hour.

The calmer time of year lasts for 6.2 months, from April 9 to October 15. The calmest day of the year is August 5, with an average hourly wind speed of 8.1 miles per hour.

Average Wind Speed

Average Wind Speed in WiltzwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mph18 mph20 mphJan 1712.3 mphJan 1712.3 mphAug 58.1 mphAug 58.1 mphOct 1510.2 mphOct 1510.2 mphApr 910.2 mphApr 910.2 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 Wiltz varies throughout the year.

The wind is most often from the west for 2.8 months, from January 22 to April 16; for 4.8 months, from May 6 to September 30; and for 1.3 weeks, from December 19 to December 28, with a peak percentage of 42% on July 7. The wind is most often from the east for 1.6 weeks, from April 25 to May 6, with a peak percentage of 27% on April 30. The wind is most often from the south for 2.6 months, from September 30 to December 19 and for 3.6 weeks, from December 28 to January 22, with a peak percentage of 40% on October 31.

Wind Direction

Wind Direction in WiltzSWEWSJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsoutheastnorth
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 Wiltz 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 Wiltz for general outdoor tourist activities is from early July to late August, with a peak score in the first week of August.

Tourism Score

Tourism Score in Wiltzbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.56.50.00.0precipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Wiltz for hot-weather activities is from mid July to mid August, with a peak score in the last week of July.

Beach/Pool Score

Beach/Pool Score in WiltzJanFebMarAprMayJunJulAugSepOctNovDec02468102.92.90.00.0 precipitationprecipitationcloudscloudstemperaturetemperature
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 Wiltz typically lasts for 6.8 months (207 days), from around April 14 to around November 7, rarely starting before March 25 or after May 2, and rarely ending before October 16 or after December 4.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Wiltzgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 1450%Apr 1450%Nov 750%Nov 790%May 290%May 290%Oct 1690%Oct 1610%Mar 2510%Mar 2510%Dec 410%Dec 40%Jan 310%Jan 31Jul 25100%Jul 25100%freezingvery coldcoldcoolcomfortablewarm
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 Wiltz should appear around May 3, only rarely appearing before April 18 or after May 18.

Growing Degree Days

Growing Degree Days in WiltzJanFebMarAprMayJunJulAugSepOctNovDec0°F200°F400°F600°F800°F1,000°F1,200°F1,400°F1,600°FMay 390°FMay 390°FJul 31900°FJul 31900°FDec 311,570°FDec 311,570°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 3.5 months, from May 2 to August 19, with an average daily incident shortwave energy per square meter above 5.3 kWh. The brightest day of the year is June 26, with an average of 6.5 kWh.

The darker period of the year lasts for 3.7 months, from October 27 to February 18, with an average daily incident shortwave energy per square meter below 1.8 kWh. The darkest day of the year is December 26, with an average of 0.6 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 Wiltz are 49.969 deg latitude, 5.932 deg longitude, and 1,394 ft elevation.

The topography within 2 miles of Wiltz contains significant variations in elevation, with a maximum elevation change of 768 feet and an average elevation above sea level of 1,321 feet. Within 10 miles contains significant variations in elevation (1,188 feet). Within 50 miles contains very significant variations in elevation (2,257 feet).

The area within 2 miles of Wiltz is covered by trees (49%), cropland (28%), and artificial surfaces (14%), within 10 miles by trees (47%) and cropland (38%), and within 50 miles by trees (42%) and cropland (28%).

Data Sources

This report illustrates the typical weather in Wiltz, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Wiltz.

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

The stations contributing to this reconstruction are: Saint-Hubert Air Base (26%, 39 kilometers, west); Luxembourg Findel Airport (25%, 43 kilometers, southeast); Spangdahlem Air Base (17%, 54 kilometers, east); Spa-La Sauvenière Airport (16%, 57 kilometers, north); and Elsenborn-Butgenbach Air Base (15%, 58 kilometers, north).

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.