Average Weather in Lyon France
In Lyon, the temperature typically varies from 33°F to 82°F over the course of the year, and is rarely below 24°F or above 93°F.
The warm season lasts for 3.0 months, from June 9 to September 10, with an average daily high temperature above 74°F. The hottest day of the year is August 4, with an average high of 82°F and low of 62°F.
The cool season lasts for 3.6 months, from November 16 to March 4, with an average daily high temperature below 52°F. The coldest day of the year is January 15, with an average low of 33°F and high of 44°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
The length of the day in Lyon varies significantly over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 40 minutes of daylight; the longest day is June 21, with 15 hours, 43 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:50 AM on June 15, and the latest sunrise is 2 hours, 31 minutes later at 8:21 AM on January 1. The earliest sunset is at 4:56 PM on December 10, and the latest sunset is 4 hours, 38 minutes later at 9:34 PM on June 26.
Daylight saving time (DST) is observed in Lyon 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
In Lyon, 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 Lyon begins around June 8 and lasts for 3.6 months, ending around September 25. On July 21, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 70% of the time, and overcast or mostly cloudy 30% of the time.
The cloudier part of the year begins around September 25 and lasts for 8.4 months, ending around June 8. On November 24, the cloudiest day of the year, the sky is overcast or mostly cloudy 64% of the time, and clear, mostly clear, or partly cloudy 36% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Lyon varies throughout the year.
The wetter season lasts 8.4 months, from April 1 to December 14, with a greater than 26% chance of a given day being a wet day. The chance of a wet day peaks at 33% on May 27.
The drier season lasts 3.6 months, from December 14 to April 1. The smallest chance of a wet day is 19% on March 5.
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 33% on May 27.
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 in the year. Lyon experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in Lyon. The most rain falls during the 31 days centered around October 6, with an average total accumulation of 2.9 inches.
The least rain falls around February 27, with and average total accumulation of 1.4 inches.
Average Monthly Rainfall
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 Lyon, 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, staying within 2% of 2% throughout.
Humidity Comfort Levels
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 Lyon experiences mildly seasonal variation over the course of the year.
The windier part of the year lasts for 7.2 months, from October 13 to May 20, with average wind speeds of more than 4.2 miles per hour. The windiest day of the year is April 3, with an average hourly wind speed of 4.8 miles per hour.
The calmer time of year lasts for 4.8 months, from May 20 to October 13. The calmest day of the year is August 12, with an average hourly wind speed of 3.7 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Lyon varies throughout the year.
The wind is most often from the north for 8.6 months, from January 16 to October 4 and for 1.6 weeks, from November 21 to December 2, with a peak percentage of 57% on July 27. The wind is most often from the south for 1.6 months, from October 4 to November 21 and for 1.5 months, from December 2 to January 16, with a peak percentage of 46% on October 28.
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 very significant seasonal variation over the course of the year.
The brighter period of the year lasts for 3.3 months, from May 12 to August 20, 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 7.1 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 2.4 kWh. The darkest day of the year is December 23, with an average of 1.2 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Lyon are 45.748 deg latitude, 4.847 deg longitude, and 581 ft elevation.
The topography within 2 miles of Lyon contains significant variations in elevation, with a maximum elevation change of 505 feet, and an average elevation above sea level of 594 feet. Within 10 miles contains very significant variations in elevation (1,650 feet). Within 50 miles contains extreme variations in elevation (4,934 feet).
The area within 2 miles of Lyon is covered by artificial surfaces (94%), within 10 miles by artificial surfaces (48%) and cropland (33%), and within 50 miles by cropland (36%) and trees (30%).
This report illustrates the typical weather in Lyon, 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 Lyon.
For each station, the records are corrected for the elevation difference between that station and Lyon 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 Lyon is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Lyon and a given station.
The stations contributing to this reconstruction are: Lyon-Bron Airport (90%, 8 kilometers, east), Saint-Étienne–Bouthéon Airport (5%, 49 kilometers, southwest), and Mâcon-Charnay (4.5%, 61 kilometers, north).
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 .