Climate: San Diego, California, summers are short, warm, moderate, and clear and winters are long, cool, and partly cloudy. Rainy season runs from November to March and there is almost no rain from the end of April to the end of October. Over the course of the year, the temperature typically varies from 50°F to 77°F and is rarely below 44°F or above 84°F.
Climate data are based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016 in the San Diego region. All other weather data comes from NASA's MERRA-2 Modern-Era Retrospective Analysis.
Solar Power Conditions: The environment for solar energy use is particularly relevant for this region to reduce power demand. The seasonal variation is marked, with the best period from late April to late August, corresponding to lowest rainfall and the highest relative humidity. Peak power period is in June
with energy levels per square meter over 100 kWh per day on average. During the low light period from early November to early February, energy drops to half the peak energy or less during the rainy period.
Humidity: Highest relative humidity is from early July to early October, corresponding to the seasonal rainless period. Very humid conditions occur from 6% to 25% of the time, particularly in August. Coastal micro-climates experience higher relative humidity for longer periods, such as La Jolla to the north, Coronado Island to the west, and Imperial Beach to the south.
WaterSeer Yield Curve: The WaterSeer yield curve is below. Yield is based on WaterSeer Sonoma model third party testing and trials under a wide variety of controlled and field conditions. Monthly yield is on the left vertical axis. The bottom horizontal axis is the average temperature. The Relative Humidity % (RH) is color coded in 10% increments.
San Diego region estimated yield: San Diego region, particularly coastal areas, is an excellent location for WaterSeer deployment, particularly from rainless period from May to November. Quarterly yield below is estimated for a small ten-unit WaterGrid installed with the geothermal module for three types of installations; outside, such as a garden or greenspace; a hydroponics grow-house or vertical farm, and coastal deployment, such as near ocean facilities and off shore islands. Power estimate is 0.35 kW-hr.
Sources and Data: Weather data and models are derived from historical weather reports January 1, 1980 to December 31, 2016. Yield estimate is from Sonoma Yield Forecast Model. Data graphics are from weatherspark.com and waterseer.org.
Disclaimer: Weather is unpredictable and weather data and analysis is probabilistic. Every effort has been made to assure this assessment is accurate and error free. It is published as is without any assurance as to its suitability for any purpose.