ET Weather Stations

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 (ETo) data based on accounts' billing cycles to calculate outdoor water budgets.

Water Budget Infographic


Station #245 in Coto De Caza – ETo values for all SMWD customers except those in San Clemente

Station #241 in San Clemente – ETo values for Talega customers

California Irrigation Management Information System

Below is the CIMIS website that contains the data from our two weather stations.


  1. Scroll down and from the drop-down menu select the type of report to run from hourly, daily, or monthly.
  2. Scroll all the way down to select either Station 241 (San Clemente) or Station 245 (Coto de Caza).
  3. Scroll right to hit "Run Report" for the weather data. Alternatively, view a simplified chart of daily ETo values.