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Average Weather in July in Olvan Spain

In Olvan, the month of July is characterized by gradually rising daily high temperatures, with daily highs increasing by 3°F, from 82°F to 85°F over the course of the month, and rarely exceeding 91°F or dropping below 74°F. The highest daily average high temperature is 85°F on July 30.

Daily low temperatures increase by 3°F, from 59°F to 61°F, rarely falling below 52°F or exceeding 66°F.

For reference, on July 30, the hottest day of the year, temperatures in Olvan typically range from 61°F to 85°F, while on January 10, the coldest day of the year, they range from 31°F to 51°F.

Average High and Low Temperature in July

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. The horizontal axis is the day, 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 July

Average Hourly Temperature in July in Olvan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM4 AM8 AM12 PM4 PM8 PM12 AMJunAugwarmcoldcoolcomfortable
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < very cold < 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.


The month of July in Olvan experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 27% to 20%. The lowest chance of overcast or mostly cloudy conditions is 19% on July 20.

The clearest day of the month is July 20, with clear, mostly clear, or partly cloudy conditions 81% of the time.

For reference, on October 30, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 51%, while on July 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 81%.

Cloud Cover Categories in July

Cloud Cover Categories in July in Olvan1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JunAugOct 3049%Oct 3049%Jul 173%Jul 173%Jul 3180%Jul 3180%Jul 1179%Jul 1179%Jul 2181%Jul 2181%mostly clearpartly cloudyclearovercastmostly cloudy
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.


A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Olvan, the chance of a wet day over the course of July is essentially constant, remaining around 13% throughout.

For reference, the year's highest daily chance of a wet day is 23% on May 6, and its lowest chance is 11% on December 26.

Probability of Precipitation in July

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).


To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during July in Olvan is essentially constant, remaining about 0.9 inches throughout, and rarely exceeding 1.8 inches or falling below 0.1 inches.

The lowest average 31-day accumulation is 0.8 inches on July 14.

Average Monthly Rainfall in July

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.


Over the course of July in Olvan, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 44 minutes, implying an average daily decrease of 1 minute, 28 seconds, and weekly decrease of 10 minutes, 18 seconds.

The shortest day of the month is July 31, with 14 hours, 27 minutes of daylight and the longest day is July 1, with 15 hours, 12 minutes of daylight.

Hours of Daylight and Twilight in July

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 of the month in Olvan is 6:20 AM on July 1 and the latest sunrise is 24 minutes later at 6:44 AM on July 31.

The latest sunset is 9:32 PM on July 1 and the earliest sunset is 20 minutes earlier at 9:12 PM on July 31.

Daylight saving time is observed in Olvan during 2017, but it neither starts nor ends during July, so the entire month is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 6:16 AM and sets 15 hours, 15 minutes later, at 9:31 PM, while on December 21, the shortest day of the year, it rises at 8:17 AM and sets 9 hours, 6 minutes later, at 5:23 PM.

Sunrise & Sunset with Twilight in July

The solar day over the course of July. 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.


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 chance that a given day will be muggy in Olvan is essentially constant during July, remaining within 1% of 1% throughout.

For reference, on August 17, the muggiest day of the year, there are muggy conditions 2% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in July

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.


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 Olvan is essentially constant during July, remaining within 0.1 miles per hour of 5.5 miles per hour throughout.

For reference, on April 5, the windiest day of the year, the daily average wind speed is 7.0 miles per hour, while on August 28, the calmest day of the year, the daily average wind speed is 5.2 miles per hour.

Average Wind Speed in July

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction in Olvan throughout July is predominantly from the south, with a peak proportion of 39% on July 9.

Wind Direction in July

Wind Direction in July in Olvan1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JunAugwestnorthsoutheast
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).

Water Temperature

Olvan 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 surface water temperature in Olvan is increasing during July, rising by 4°F, from 71°F to 76°F, over the course of the month.

Average Water Temperature in July

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

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 in Olvan is essentially constant during July, remaining within 0.2 kWh of 7.2 kWh throughout.

The highest average daily incident shortwave solar energy during July is 7.5 kWh on July 5.

Average Daily Incident Shortwave Solar Energy in July

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


For the purposes of this report, the geographical coordinates of Olvan are 42.067 deg latitude, 1.900 deg longitude, and 1,965 ft elevation.

The topography within 2 miles of Olvan contains very significant variations in elevation, with a maximum elevation change of 1,555 feet and an average elevation above sea level of 2,005 feet. Within 10 miles contains very significant variations in elevation (5,692 feet). Within 50 miles also contains extreme variations in elevation (10,184 feet).

The area within 2 miles of Olvan is covered by shrubs (35%), cropland (35%), and trees (29%), within 10 miles by trees (56%) and cropland (24%), and within 50 miles by trees (53%) and cropland (23%).

Data Sources

This report illustrates the typical weather in Olvan year round, 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 Olvan.

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

The stations contributing to this reconstruction are: Aeroport de Girona - Costa Brava (34%, 74 kilometers, east); Barcelona–El Prat Airport (26%, 87 kilometers, south); Perpignan–Rivesaltes Airport (20%, 109 kilometers, northeast); and Saint-Girons - Antichan (20%, 124 kilometers, northwest).

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.


The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.