Average Weather in Castellar del Riu Spain
In Castellar del Riu, the summers are comfortable and mostly clear; the winters are long, chilly, and partly cloudy; and it is dry year round. Over the course of the year, the temperature typically varies from 23°F to 75°F and is rarely below 16°F or above 82°F.
The warm season lasts for 3.0 months, from June 13 to September 12, with an average daily high temperature above 68°F. The hottest day of the year is July 30, with an average high of 75°F and low of 53°F.
The cold season lasts for 3.7 months, from November 16 to March 8, with an average daily high temperature below 48°F. The coldest day of the year is January 11, with an average low of 23°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
In Castellar del Riu, 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 Castellar del Riu begins around June 18 and lasts for 2.6 months, ending around September 5. On July 20, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 81% of the time, and overcast or mostly cloudy 19% of the time.
The cloudier part of the year begins around September 5 and lasts for 9.4 months, ending around June 18. On October 29, the cloudiest day of the year, the sky is overcast or mostly cloudy 51% of the time, and clear, mostly clear, or partly cloudy 49% 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 Castellar del Riu varies throughout the year.
The wetter season lasts 9.4 months, from September 8 to June 20, with a greater than 18% chance of a given day being a wet day. The chance of a wet day peaks at 24% on May 6.
The drier season lasts 2.6 months, from June 20 to September 8. The smallest chance of a wet day is 12% on July 14.
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 23% on May 6.
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. Castellar del Riu experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 10 months, from February 12 to December 25, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around October 11, with an average total accumulation of 1.8 inches.
The rainless period of the year lasts for 1.5 months, from December 25 to February 12. The least rain falls around January 11, with an average total accumulation of 0.4 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Castellar del Riu experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 4.8 months, from November 9 to April 2, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 15, with an average total liquid-equivalent accumulation of 0.4 inches.
The snowless period of the year lasts for 7.2 months, from April 2 to November 9. The least snow falls around August 2, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Castellar del Riu varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 6 minutes of daylight; the longest day is June 21, with 15 hours, 15 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:16 AM on June 15, and the latest sunrise is 2 hours, 5 minutes later at 8:21 AM on January 3. The earliest sunset is at 5:20 PM on December 8, and the latest sunset is 4 hours, 12 minutes later at 9:33 PM on June 26.
Daylight saving time (DST) is observed in Castellar del Riu 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
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 Castellar del Riu, 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
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 Castellar del Riu experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 6.2 months, from November 10 to May 15, with average wind speeds of more than 3.2 miles per hour. The windiest day of the year is April 5, with an average hourly wind speed of 3.8 miles per hour.
The calmer time of year lasts for 5.8 months, from May 15 to November 10. The calmest day of the year is August 28, with an average hourly wind speed of 2.6 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Castellar del Riu varies throughout the year.
The wind is most often from the south for 3.9 months, from May 13 to September 10, with a peak percentage of 38% on August 4. The wind is most often from the north for 8.1 months, from September 10 to May 13, with a peak percentage of 51% on January 1.
Castellar del Riu 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 significant seasonal variation over the course of the year.
The time of year with warmer water lasts for 2.8 months, from July 6 to September 29, with an average temperature above 72°F. The day of the year with the warmest water is August 14, with an average temperature of 77°F.
The time of year with cooler water lasts for 4.9 months, from December 7 to May 3, with an average temperature below 59°F. The day of the year with the coolest water is February 19, with an average temperature of 55°F.
Average Water Temperature
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 3.3 months, from May 7 to August 17, with an average daily incident shortwave energy per square meter above 6.4 kWh. The brightest day of the year is July 5, with an average of 7.5 kWh.
The darker period of the year lasts for 3.4 months, from October 27 to February 10, with an average daily incident shortwave energy per square meter below 3.1 kWh. The darkest day of the year is December 20, with an average of 1.9 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Castellar del Riu are 42.123 deg latitude, 1.774 deg longitude, and 4,436 ft elevation.
The topography within 2 miles of Castellar del Riu contains extreme variations in elevation, with a maximum elevation change of 3,514 feet and an average elevation above sea level of 5,040 feet. Within 10 miles also contains extreme variations in elevation (6,667 feet). Within 50 miles also contains extreme variations in elevation (10,102 feet).
The area within 2 miles of Castellar del Riu is covered by trees (91%), within 10 miles by trees (65%) and cropland (14%), and within 50 miles by trees (53%) and cropland (22%).
This report illustrates the typical weather in Castellar del Riu, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Castellar del Riu.
For each station, the records are corrected for the elevation difference between that station and Castellar del Riu 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 Castellar del Riu is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Castellar del Riu and a given station.
The stations contributing to this reconstruction are: Aeroport de Girona - Costa Brava (23%, 85 kilometers, east); Barcelona–El Prat Airport (19%, 95 kilometers, south); Saint-Girons - Antichan (23%, 113 kilometers, northwest); Perpignan–Rivesaltes Airport (18%, 113 kilometers, northeast); and Carcassonne-Salvaza (17%, 129 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 .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.