This article details how to associate a weather station with a site, as well as how to retrieve data related to the selected weather station for your site (including HDD and CDD). 

TABLE OF CONTENTS

• Introduction 
• Modifying the Weather Station - "My Site" Tab 
• Available Weather Data 
  • HDD (Heating Degree Days):
  • CDD (Cooling Degree Days):
  • Outdoor Temperature (°C):
  • Outdoor Humidity (g/m³):
  • Sunshine Duration (MJ/m²):
  • Solar Irradiation (Wh/m²):
  • Rainfall (mm/m²):

Introduction 

When creating a site in your portfolio, an API automatically adds a reference weather station based on the geographical coordinates of the site. The reference station corresponds to the closest station to the site in question. 

Modifying the Weather Station - "My Site" Tab 

It is possible to manually change the weather station assigned to the site. This can be done from the "My Site" tab in the synoptic by switching to Edit mode and clicking on the Weather Station Code in your "Financial Profile." 

Several stations will be suggested, with different calculation modes depending on the data retrieved (for example, COSTIC Data or Weatherbit Data). 

These details can be viewed from the My Site tab in the Synoptic. 

The choice of reference station directly affects the data retrieved (influence factors) in the widgets on the site's dashboards! 

Available Weather Data 

Several weather indicators can be retrieved from the single-site widgets using the Influence Factors: 

• HDD (Heating Degree Days):

  HDD is a Heating Degree Day calculated on a base (18°C or 26°C). This indicator measures the difference between the outside temperature and a reference temperature (base). The lower the outside temperature, the higher the HDD.

• CDD (Cooling Degree Days):

   In cooling periods, this indicator measures the difference between the outside temperature and a reference temperature. 

• Outdoor Temperature (°C):

   The outdoor temperature is measured in degrees Celsius (°C) and represents the warmth or coolness of the ambient air. It's a crucial parameter for understanding general weather conditions. 

• Outdoor Humidity (g/m³):

   Outdoor humidity is expressed in grams per cubic meter (g/m³) and indicates the amount of water vapor present in the air. High humidity can make the atmosphere feel heavier, while lower humidity can make it feel drier. 

• Sunshine Duration (MJ/m²):

   Sunshine duration measures the total amount of solar energy received per unit area, expressed in megajoules per square meter (MJ/m²). It gives an indication of the amount of sunlight available over a given period, which is critical for various sectors such as agriculture and solar energy production. 

• Solar Irradiation (Wh/m²):

   Solar irradiation is a measure of the solar energy incident per unit area, expressed in watt-hours per square meter (Wh/m²). It provides more detailed information on the amount of solar energy received and can be used to assess the solar energy production potential in a given region. 

• Rainfall (mm/m²):

   Rainfall measures the total amount of precipitation, usually expressed in millimeters per square meter (mm/m²). This indicator is crucial for assessing rain conditions, which is essential for water management, agriculture, and flood prevention.