Average Weather in Bragança Portugal

In Bragança, 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 85°F and is rarely below 25°F or above 94°F.

The warm season lasts for 2.8 months, from June 18 to September 13, with an average daily high temperature above 77°F. The hottest day of the year is July 30, with an average high of 85°F and low of 59°F.

The cool season lasts for 3.5 months, from November 15 to March 1, with an average daily high temperature below 54°F. The coldest day of the year is January 15, with an average low of 34°F and high of 47°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.

Average Hourly Temperature

The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

In Bragança, 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 Bragança begins around June 6 and lasts for 3.4 months, ending around September 18. On July 21, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 83% of the time, and overcast or mostly cloudy 17% 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 26, the cloudiest day of the year, the sky is overcast or mostly cloudy 61% of the time, and clear, mostly clear, or partly cloudy 39% of the time.

Cloud Cover

The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

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

The wetter season lasts 8.0 months, from September 26 to May 27, with a greater than 18% chance of a given day being a wet day. The chance of a wet day peaks at 29% on October 31.

The drier season lasts 4.0 months, from May 27 to September 26. The smallest chance of a wet day is 5% on July 31.

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 29% on October 31.

Daily Chance of Precipitation

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).

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. Bragança experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 10 months, from August 21 to July 4, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around December 27, with an average total accumulation of 3.1 inches.

The rainless period of the year lasts for 1.5 months, from July 4 to August 21. The least rain falls around July 29, with an average total accumulation of 0.4 inches.

Average Monthly Rainfall

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.

Sun

The length of the day in Bragança varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 8 minutes of daylight; the longest day is June 21, with 15 hours, 13 minutes of daylight.

Hours of Daylight and Twilight

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 is at 5:51 AM on June 14, and the latest sunrise is 2 hours, 3 minutes later at 7:54 AM on October 28. The earliest sunset is at 4:56 PM on December 8, and the latest sunset is 4 hours, 10 minutes later at 9:06 PM on June 27.

Daylight saving time (DST) is observed in Bragança 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

The solar day over the course of the year 2017. 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. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

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 Bragança, 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 percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Bragança does not vary significantly over the course of the year, remaining within 0.4 miles per hour of 4.3 miles per hour throughout.

Average Wind Speed

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Bragança varies throughout the year.

The wind is most often from the west for 1.9 weeks, from February 11 to February 24; for 5.3 months, from March 23 to September 2; and for 1.9 months, from September 16 to November 14, with a peak percentage of 39% on June 1. The wind is most often from the east for 3.9 weeks, from February 24 to March 23; for 2.0 weeks, from September 2 to September 16; and for 2.9 months, from November 14 to February 11, with a peak percentage of 33% on September 5.

Wind Direction

The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

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 experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.2 months, from May 15 to August 22, with an average daily incident shortwave energy per square meter above 6.7 kWh. The brightest day of the year is July 6, with an average of 8.0 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 2.9 kWh. The darkest day of the year is December 30, with an average of 1.6 kWh.

Average Daily Incident Shortwave Solar Energy

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

Topography

For the purposes of this report, the geographical coordinates of Bragança are 41.806 deg latitude, -6.757 deg longitude, and 2,257 ft elevation.

The topography within 2 miles of Bragança contains very significant variations in elevation, with a maximum elevation change of 938 feet and an average elevation above sea level of 2,200 feet. Within 10 miles contains very significant variations in elevation (2,884 feet). Within 50 miles contains large variations in elevation (6,785 feet).

The area within 2 miles of Bragança is covered by cropland (55%), artificial surfaces (26%), and trees (18%), within 10 miles by cropland (49%) and trees (32%), and within 50 miles by trees (40%) and cropland (36%).

Data Sources

This report illustrates the typical weather in Bragança, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Bragança.

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

The stations contributing to this reconstruction are: Braganca (96%, 7 kilometers, northeast); Vila Real Airport (1.9%, 100 kilometers, southwest); Salamanca Airport (1.1%, 142 kilometers, southeast); and Vigo-Peinador Airport (0.9%, 162 kilometers, west).

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.