Average Weather at Aéroport Genève-Cointrin Switzerland
At Aéroport Genève-Cointrin, the summers are warm, the winters are very cold and wet, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 30°F to 79°F and is rarely below 22°F or above 89°F.
Based on the tourism score, the best time of year to visit Aéroport Genève-Cointrin for warm-weather activities is from late June to early September.
The warm season lasts for 3.1 months, from June 6 to September 9, with an average daily high temperature above 71°F. The hottest day of the year is August 4, with an average high of 79°F and low of 58°F.
The cold season lasts for 3.6 months, from November 16 to March 3, with an average daily high temperature below 48°F. The coldest day of the year is January 27, with an average low of 30°F and high of 41°F.
Average High and Low Temperature
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
Coquitlam, Canada (5,165 miles away) and Boone, North Carolina, United States (4,383 miles) are the far-away foreign places with temperatures most similar to Aéroport Genève-Cointrin (view comparison).
At Aéroport Genève-Cointrin, 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 at Aéroport Genève-Cointrin begins around June 16 and lasts for 3.1 months, ending around September 18. On July 21, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 68% of the time, and overcast or mostly cloudy 32% of the time.
The cloudier part of the year begins around September 18 and lasts for 8.9 months, ending around June 16. On December 31, the cloudiest day of the year, the sky is overcast or mostly cloudy 59% of the time, and clear, mostly clear, or partly cloudy 41% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Aéroport Genève-Cointrin varies throughout the year.
The wetter season lasts 8.1 months, from April 28 to December 31, with a greater than 33% chance of a given day being a wet day. The chance of a wet day peaks at 40% on May 25.
The drier season lasts 4.0 months, from December 31 to April 28. The smallest chance of a wet day is 26% 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 40% on May 25.
Daily Chance of Precipitation
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. Aéroport Genève-Cointrin experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year at Aéroport Genève-Cointrin. The most rain falls during the 31 days centered around October 11, with an average total accumulation of 3.6 inches.
The least rain falls around March 9, with an average total accumulation of 2.6 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall at Aéroport Genève-Cointrin 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
The length of the day at Aéroport Genève-Cointrin varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 37 minutes of daylight; the longest day is June 21, with 15 hours, 47 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:43 AM on June 16, and the latest sunrise is 2 hours, 35 minutes later at 8:18 AM on January 1. The earliest sunset is at 4:49 PM on December 11, and the latest sunset is 4 hours, 42 minutes later at 9:31 PM on June 26.
Daylight saving time (DST) is observed at Aéroport Genève-Cointrin during 2018, starting in the spring on March 25, lasting 7.1 months, and ending in the fall on October 28.
Sunrise & Sunset with Twilight and Daylight Saving Time
The perceived humidity level at Aéroport Genève-Cointrin, 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
The average hourly wind speed at Aéroport Genève-Cointrin experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 3.9 months, from January 7 to May 4, with average wind speeds of more than 6.2 miles per hour. The windiest day of the year is April 3, with an average hourly wind speed of 6.9 miles per hour.
The calmer time of year lasts for 8.1 months, from May 4 to January 7. The calmest day of the year is August 10, with an average hourly wind speed of 5.6 miles per hour.
Average Wind Speed
The predominant average hourly wind direction at Aéroport Genève-Cointrin varies throughout the year.
The wind is most often from the north for 1.3 months, from April 1 to May 11; for 1.0 weeks, from July 23 to July 30; and for 4.0 weeks, from August 18 to September 15, with a peak percentage of 35% on April 19. The wind is most often from the west for 2.4 months, from May 11 to July 23 and for 2.7 weeks, from July 30 to August 18, with a peak percentage of 36% on July 5. The wind is most often from the south for 6.5 months, from September 15 to April 1, with a peak percentage of 49% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is at Aéroport Genève-Cointrin 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 Aéroport Genève-Cointrin for general outdoor tourist activities is from late June to early September, 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 Aéroport Genève-Cointrin for hot-weather activities is from early July to mid August, with a peak score in the first week of August.
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.
The growing season at Aéroport Genève-Cointrin typically lasts for 7.0 months (213 days), from around April 7 to around November 7, rarely starting before March 12 or after April 27, and rarely ending before October 17 or after November 29.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms at Aéroport Genève-Cointrin should appear around April 16, only rarely appearing before April 3 or after May 1.
Growing Degree Days
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 3.2 months, from May 13 to August 19, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is July 5, with an average of 7.0 kWh.
The darker period of the year lasts for 3.5 months, from October 28 to February 14, with an average daily incident shortwave energy per square meter below 2.4 kWh. The darkest day of the year is December 24, with an average of 1.3 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Aéroport Genève-Cointrin are 46.238 deg latitude, 6.109 deg longitude, and 1,391 ft elevation.
The topography within 2 miles of Aéroport Genève-Cointrin contains only modest variations in elevation, with a maximum elevation change of 295 feet and an average elevation above sea level of 1,405 feet. Within 10 miles contains only modest variations in elevation (4,505 feet). Within 50 miles also contains extreme variations in elevation (15,131 feet).
The area within 2 miles of Aéroport Genève-Cointrin is covered by artificial surfaces (66%) and cropland (27%), within 10 miles by cropland (34%) and trees (26%), and within 50 miles by trees (42%) and cropland (22%).
This report illustrates the typical weather at Aéroport Genève-Cointrin, 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
Aéroport Genève-Cointrin has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.
In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.
The stations on which we may fall back include but are not limited to Annecy-Meythet, Chambéry Airport, Ambérieu, Besançon – La Vèze Aerodrome, Dole–Jura Airport, Les Eplatures, Neuchatel, and Lyon–Saint Exupéry Airport.
Time zones for aiports and weather stations are provided by AskGeo.com .