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  5. August

Average Weather in August in Ecublens Switzerland

Daily high temperatures decrease by 5°F, from 78°F to 74°F, rarely falling below 65°F or exceeding 88°F. The highest daily average high temperature is 79°F on August 4.

Daily low temperatures decrease by 4°F, from 60°F to 57°F, rarely falling below 50°F or exceeding 66°F. The highest daily average low temperature is 60°F on August 1.

For reference, on August 4, the hottest day of the year, temperatures in Ecublens typically range from 60°F to 79°F, while on January 15, the coldest day of the year, they range from 30°F to 39°F.

Average High and Low Temperature in August

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 hourly average temperatures for the quarter of the year centered on August. The horizontal axis is the day, 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 August

Average Hourly Temperature in August in Ecublens18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM4 AM8 AM12 PM4 PM8 PM12 AMJulSepcoldcoolcomfortablecomfortablewarm
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.

Abbotsford, Canada (5,160 miles away) and Boone, North Carolina, United States (4,394 miles) are the far-away foreign places with temperatures most similar to Ecublens (view comparison).


The month of August in Ecublens experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 35% to 40%.

The clearest day of the month is August 3, with clear, mostly clear, or partly cloudy conditions 65% of the time.

For reference, on November 24, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 58%, while on July 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 66%.

Cloud Cover Categories in August

Cloud Cover Categories in August in Ecublens1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSepAug 165%Aug 165%Aug 3160%Aug 3160%Aug 1163%Aug 1163%Aug 2161%Aug 2161%clearmostly 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.


A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Ecublens, the chance of a wet day over the course of August is essentially constant, remaining around 33% throughout.

For reference, the year's highest daily chance of a wet day is 43% on May 26, and its lowest chance is 27% on March 3.

Probability of Precipitation in August

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).


To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during August in Ecublens is essentially constant, remaining about 3.3 inches throughout, and rarely exceeding 5.7 inches or falling below 1.5 inches.

The lowest average 31-day accumulation is 3.1 inches on August 5.

Average Monthly Rainfall in August

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.


Over the course of August in Ecublens, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 28 minutes, implying an average daily decrease of 2 minutes, 56 seconds, and weekly decrease of 20 minutes, 31 seconds.

The shortest day of the month is August 31, with 13 hours, 23 minutes of daylight and the longest day is August 1, with 14 hours, 51 minutes of daylight.

Hours of Daylight and Twilight in August

Hours of Daylight and Twilight in August in Ecublens1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrJulSepnightnightdaydayAug 114 hr, 51 minAug 114 hr, 51 minAug 3113 hr, 23 minAug 3113 hr, 23 min
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 of the month in Ecublens is 6:14 AM on August 1 and the latest sunrise is 38 minutes later at 6:52 AM on August 31.

The latest sunset is 9:05 PM on August 1 and the earliest sunset is 50 minutes earlier at 8:15 PM on August 31.

Daylight saving time is observed in Ecublens during 2018, but it neither starts nor ends during August, so the entire month is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 5:40 AM and sets 15 hours, 50 minutes later, at 9:30 PM, while on December 21, the shortest day of the year, it rises at 8:14 AM and sets 8 hours, 34 minutes later, at 4:48 PM.

Sunrise & Sunset with Twilight in August

The solar day over the course of August. 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.


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 chance that a given day will be muggy in Ecublens is essentially constant during August, remaining around 1% throughout.

The highest chance of a muggy day during August is 1% on August 11.

For reference, on July 25, the muggiest day of the year, there are muggy conditions 1% of the time, while on October 2, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in August

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.


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 Ecublens is essentially constant during August, remaining within 0.2 miles per hour of 5.9 miles per hour throughout.

For reference, on April 3, the windiest day of the year, the daily average wind speed is 7.2 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 5.7 miles per hour.

The lowest daily average wind speed during August is 5.7 miles per hour on August 10.

Average Wind Speed in August

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction in Ecublens throughout August is predominantly from the west, with a peak proportion of 38% on August 1.

Wind Direction in August

Wind Direction in August in EcublensWS1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%JulSepwestsouthnortheast
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).

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 Ecublens typically lasts for 7.8 months (239 days), from around March 19 to around November 13, rarely starting before February 23 or after April 11, and rarely ending before October 21 or after December 10.

The month of August in Ecublens is reliably fully within the growing season.

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

Time Spent in Various Temperature Bands and the Growing Season in August in Ecublensgrowing seasongrowing seasongrowing season1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSep100%Aug 16100%Aug 16Jul 22100%Jul 22100%coldcoolcomfortablewarmhot
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.

The average accumulated growing degree days in Ecublens are rapidly increasing during August, increasing by 531°F, from 1,471°F to 2,002°F, over the course of the month.

Growing Degree Days in August

The average growing degree days accumulated over the course of August, 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 in Ecublens is decreasing during August, falling by 1.1 kWh, from 6.5 kWh to 5.3 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in August

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


For the purposes of this report, the geographical coordinates of Ecublens are 46.529 deg latitude, 6.563 deg longitude, and 1,352 ft elevation.

The topography within 2 miles of Ecublens contains only modest variations in elevation, with a maximum elevation change of 436 feet and an average elevation above sea level of 1,343 feet. Within 10 miles contains only modest variations in elevation (1,923 feet). Within 50 miles contains very significant variations in elevation (13,757 feet).

The area within 2 miles of Ecublens is covered by artificial surfaces (78%) and cropland (11%), within 10 miles by cropland (40%) and water (32%), and within 50 miles by trees (39%) and cropland (22%).

Data Sources

This report illustrates the typical weather in Ecublens year round, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Ecublens.

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

The stations contributing to this reconstruction are: Aéroport Genève-Cointrin (44%, 48 kilometers, southwest); Neuchatel (30%, 60 kilometers, northeast); and Sion (26%, 68 kilometers, southeast).

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.


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.