Weather Information

SMWD has two weather stations connected to the California Irrigation Management Information System (CIMIS) which provides 24/7 monitoring of local weather. The District’s budget-based tiered rate structure uses daily evapotranspiration (ET_o) data based on accounts’ billing cycles to calculate outdoor water budgets.

Directions to Download Weather Data:

View our Daily ET Data webpage, or

Visit the CIMIS website to view data from our two weather stations.

On the Data tab, select the type of report to run from hourly, daily, or monthly from the drop-down menu.
Scroll all the way down to select either Station 241 (San Clemente) or Station 245 (Coto de Caza).
Click "Run Report" for the weather data. Alternatively, view a simplified chart of daily ET_o values.

California Irrigation Management Information System (CIMIS)

Station #245 in Coto De Caza

ET_o values for all SMWD customers except those in San Clemente

Station #241 in San Clemente

ET_o values for Talega customers

What is Evapotranspiration or ET?

Evaporation is the process of water vapor leaving the soil or plant's surface. Transpiration is the process of water leaving from within the plant leaves. Thus, evapotranspiration (ET) is the total loss of water to the atmosphere from the plant's soil, surface and tissue.

Learn more at CIMIS