Average Weather in Milan Italy
Milan has a warm humid temperate climate with hot summers and no dry season. The temperature typically varies from 31°F to 85°F over the course of the year, and is rarely below 23°F or above 92°F.
The hot season lasts for 105 days, from June 1 to September 14, with an average daily high temperature above 77°F. The hottest day of the year is July 26, with an average high of 85°F and low of 67°F.
The cold season lasts for 98 days, from November 19 to February 25, with an average daily high temperature below 51°F. The coldest day of the year is January 12, with an average low of 31°F and high of 42°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 Milan varies significantly over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 42 minutes of daylight; the longest day is June 21, with 15 hours, 41 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:34 AM on June 15, and the latest sunrise is 2 hours, 29 minutes later at 8:03 AM on January 2. The earliest sunset is at 4:39 PM on December 10, and the latest sunset is 4 hours, 36 minutes later at 9:15 PM on June 26.
Daylight saving time (DST) is observed in Milan during 2017, starting in the spring on March 26, lasting 216 days, and ending in the fall on October 29.
Sunrise & Sunset with Twilight and Daylight Saving Time
In Milan, 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 Milan begins around June 16 and lasts for 97 days, ending around September 21. On July 22, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 75% of the time, and overcast or mostly cloudy 25% of the time.
The cloudier part of the year begins around September 21 and lasts for 268 days, ending around June 16. On November 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 52% of the time, and clear, mostly clear, or partly cloudy 48% 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 Milan varies throughout the year.
The wetter season lasts 235 days, from March 31 to November 21, with a greater than 25% chance of a given day being a wet day. The chance of a wet day peaks at 34% on April 30.
The drier season lasts 130 days, from November 21 to March 31. The smallest chance of a wet day is 15% on February 8.
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 34% on April 30.
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. Milan experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Milan. The most rain falls during the 31 days centered around November 5, with an average total accumulation of 3.7 inches.
The least rain falls around January 25, with and average total accumulation of 1.5 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in Milan 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
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.
Milan experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 93 days, from June 10 to September 11, during which time the comfort level is muggy, oppressive, or miserable at least 12% of the time. The muggiest day of the year is August 6, with muggy conditions 48% of the time.
The least muggy day of the year is February 27, when muggy conditions are essentially unheard of.
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 Milan does not vary significantly over the course of the year, remaining within 0.5 miles per hour of 2.5 miles per hour throughout.
Average Wind Speed
The predominant average hourly wind direction in Milan is from the east throughout the year.
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 99 days, from May 12 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 6, with an average of 7.1 kWh.
The darker period of the year lasts for 110 days, from October 26 to February 13, with an average daily incident shortwave energy per square meter below 2.6 kWh. The darkest day of the year is December 16, with an average of 1.4 kWh.
Average Daily Incident Shortwave Solar Energy
The area within 2 miles of Milan is covered by artificial surfaces (100%), within 10 miles by artificial surfaces (50%) and cropland (48%), and within 50 miles by cropland (54%) and trees (26%).
The topography within 2 miles of Milan contains only modest variations in elevation, with a maximum elevation change of 138 feet, and an average elevation above sea level of 409 feet. Within 10 miles also contains only modest variations in elevation (427 feet). Within 50 miles contains extreme variations in elevation (8,412 feet).
This report illustrates the typical weather in Milan, 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 Milan.
For each station, the records are are corrected for the elevation difference between that station and Milan 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 Milan is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Milan and a given station.
The stations contributing to this reconstruction are: Milano Linate Airport (87%, 7 kilometers, east), Milano Malpensa Airport (6%, 40 kilometers, northwest), and Novara / Cameri (6%, 41 kilometers, west).
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 .