Average Weather in Covilhã Portugal

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In Covilhã, the summers are short, warm, dry, and mostly clear and the winters are chilly, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 34°F to 84°F and is rarely below 25°F or above 94°F.

The warm season lasts for 2.8 months, from June 20 to September 15, with an average daily high temperature above 77°F. The hottest day of the year is July 30, with an average high of 84°F and low of 58°F.

The cool season lasts for 3.7 months, from November 14 to March 4, with an average daily high temperature below 55°F. The coldest day of the year is January 18, with an average low of 34°F and high of 48°F.

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.

In Covilhã, 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 Covilhã begins around June 6 and lasts for 3.4 months, ending around September 18. On July 20, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 87% of the time, and overcast or mostly cloudy 13% of the time.

The cloudier part of the year begins around September 18 and lasts for 8.6 months, ending around June 6. On December 16, 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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Covilhã varies throughout the year.

The wetter season lasts 8.1 months, from September 24 to May 27, with a greater than 20% chance of a given day being a wet day. The chance of a wet day peaks at 34% on October 31.

The drier season lasts 3.9 months, from May 27 to September 24. The smallest chance of a wet day is 4% on July 22.

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 October 31.

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. Covilhã experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 10 months, from August 19 to July 1, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around November 3, with an average total accumulation of 4.8 inches.

The rainless period of the year lasts for 1.6 months, from July 1 to August 19. The least rain falls around July 25, with an average total accumulation of 0.3 inches.

The length of the day in Covilhã varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 18 minutes of daylight; the longest day is June 21, with 15 hours, 3 minutes of daylight.

The earliest sunrise is at 5:59 AM on June 14, and the latest sunrise is 1 hour, 55 minutes later at 7:55 AM on October 28. The earliest sunset is at 5:03 PM on December 7, and the latest sunset is 4 hours, 0 minutes later at 9:03 PM on June 27.

Daylight saving time (DST) is observed in Covilhã during 2017, starting in the spring on March 26, lasting 7.1 months, and ending in the fall on October 29.

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 Covilhã, 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.

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 predominant average hourly wind direction in Covilhã varies throughout the year.

The wind is most often from the north for 1.7 weeks, from March 18 to March 30; for 3.4 months, from June 3 to September 16; and for 1.0 weeks, from September 22 to September 29, with a peak percentage of 44% on July 11. The wind is most often from the west for 2.1 months, from March 30 to June 3; for 6.0 days, from September 16 to September 22; and for 2.4 weeks, from September 29 to October 16, with a peak percentage of 37% on May 28. The wind is most often from the east for 4.6 months, from October 31 to March 18, with a peak percentage of 31% on January 1.

Covilhã is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 4.2 months, from June 12 to October 18, with an average temperature above 63°F. The day of the year with the warmest water is August 7, with an average temperature of 65°F.

The time of year with cooler water lasts for 3.6 months, from December 26 to April 14, with an average temperature below 58°F. The day of the year with the coolest water is February 13, with an average temperature of 56°F.

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 3.2 months, from May 16 to August 22, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest day of the year is July 8, with an average of 8.2 kWh.

The darker period of the year lasts for 3.6 months, from October 26 to February 15, with an average daily incident shortwave energy per square meter below 3.1 kWh. The darkest day of the year is December 26, with an average of 1.8 kWh.

For the purposes of this report, the geographical coordinates of Covilhã are 40.286 deg latitude, -7.504 deg longitude, and 2,349 ft elevation.

The topography within 2 miles of Covilhã contains large variations in elevation, with a maximum elevation change of 3,219 feet and an average elevation above sea level of 2,417 feet. Within 10 miles contains large variations in elevation (5,272 feet). Within 50 miles also contains extreme variations in elevation (6,506 feet).

The area within 2 miles of Covilhã is covered by trees (41%), cropland (32%), and artificial surfaces (18%), within 10 miles by trees (41%) and cropland (34%), and within 50 miles by trees (53%) and cropland (30%).

This report illustrates the typical weather in Covilhã, 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 Covilhã.

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

The stations contributing to this reconstruction are: Vila Real Airport (46%, 111 kilometers, north); Monte Real Mil. (32%, 128 kilometers, southwest); and Salamanca Airport (22%, 185 kilometers, northeast).

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.