Average Weather in September in Sant Julià de Cerdanyola Spain
In Sant Julià de Cerdanyola, the month of September is characterized by falling daily high temperatures, with daily highs decreasing by 9°F, from 74°F to 66°F over the course of the month, and rarely exceeding 82°F or dropping below 57°F.
Daily low temperatures decrease by 7°F, from 53°F to 46°F, rarely falling below 39°F or exceeding 58°F.
For reference, on July 30, the hottest day of the year, temperatures in Sant Julià de Cerdanyola typically range from 56°F to 78°F, while on January 15, the coldest day of the year, they range from 27°F to 44°F.
Average High and Low Temperature in September
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. 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 September
The month of September in Sant Julià de Cerdanyola experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 35% to 47%.
The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 65% of the time.
For reference, on October 29, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 53%, while on July 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 79%.
Cloud Cover Categories in September
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Sant Julià de Cerdanyola, the chance of a wet day over the course of September is gradually increasing, starting the month at 18% and ending it at 21%.
For reference, the year's highest daily chance of a wet day is 24% on May 8, and its lowest chance is 13% on July 14.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Sant Julià de Cerdanyola is gradually increasing, starting the month at 1.3 inches, when it rarely exceeds 2.3 inches or falls below 0.4 inches, and ending the month at 1.7 inches, when it rarely exceeds 3.4 inches or falls below 0.4 inches.
Average Monthly Rainfall in September
Over the course of September in Sant Julià de Cerdanyola, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 21 minutes, implying an average daily decrease of 2 minutes, 48 seconds, and weekly decrease of 19 minutes, 36 seconds.
The shortest day of the month is September 30, with 11 hours, 47 minutes of daylight and the longest day is September 1, with 13 hours, 8 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Sant Julià de Cerdanyola is 7:17 AM on September 1 and the latest sunrise is 31 minutes later at 7:48 AM on September 30.
The latest sunset is 8:26 PM on September 1 and the earliest sunset is 51 minutes earlier at 7:35 PM on September 30.
Daylight saving time is observed in Sant Julià de Cerdanyola during 2017, but it neither starts nor ends during September, 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, 16 minutes later, at 9:32 PM, while on December 21, the shortest day of the year, it rises at 8:17 AM and sets 9 hours, 5 minutes later, at 5:23 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in September
The chance that a given day will be muggy in Sant Julià de Cerdanyola is essentially constant during September, remaining around 0% throughout.
For reference, on August 15, the muggiest day of the year, there are muggy conditions 0% 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 September
The average hourly wind speed in Sant Julià de Cerdanyola is gradually increasing during September, increasing from 4.6 miles per hour to 5.3 miles per hour over the course of the month.
For reference, on April 5, the windiest day of the year, the daily average wind speed is 6.9 miles per hour, while on August 27, the calmest day of the year, the daily average wind speed is 4.5 miles per hour.
Average Wind Speed in September
Wind Direction in September
Sant Julià de Cerdanyola 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 Sant Julià de Cerdanyola is decreasing during September, falling by 4°F, from 76°F to 72°F, over the course of the month.
Average Water Temperature in September
The growing season in Sant Julià de Cerdanyola typically lasts for 6.0 months (185 days), from around April 25 to around October 27, rarely starting before April 1 or after May 16, and rarely ending before October 7 or after November 16.
The month of September in Sant Julià de Cerdanyola is very likely fully within the growing season, with the chance that a given day is in the growing season gradually decreasing from 100% to 96% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in Sant Julià de Cerdanyola is increasing during September, increasing by 288°F, from 1,642°F to 1,930°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Sant Julià de Cerdanyola is decreasing during September, falling by 1.4 kWh, from 5.7 kWh to 4.3 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Sant Julià de Cerdanyola are 42.223 deg latitude, 1.893 deg longitude, and 3,412 ft elevation.
The topography within 2 miles of Sant Julià de Cerdanyola contains large variations in elevation, with a maximum elevation change of 2,562 feet and an average elevation above sea level of 3,275 feet. Within 10 miles contains large variations in elevation (6,699 feet). Within 50 miles also contains extreme variations in elevation (9,997 feet).
The area within 2 miles of Sant Julià de Cerdanyola is covered by trees (77%) and cropland (11%), within 10 miles by trees (73%) and grassland (13%), and within 50 miles by trees (56%) and cropland (19%).
This report illustrates the typical weather in Sant Julià de Cerdanyola 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Sant Julià de Cerdanyola.
For each station, the records are corrected for the elevation difference between that station and Sant Julià de Cerdanyola 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 Sant Julià de Cerdanyola is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Sant Julià de Cerdanyola and a given station.
The stations contributing to this reconstruction are: Aeroport de Girona - Costa Brava (24%, 80 kilometers, southeast); Perpignan–Rivesaltes Airport (19%, 99 kilometers, northeast); Barcelona–El Prat Airport (18%, 104 kilometers, south); Saint-Girons - Antichan (22%, 109 kilometers, northwest); and Carcassonne-Salvaza (18%, 116 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .