from meterological u201c normals means and extremes u201d weather data when the difference between the set point readings and the surrounding rh or temperature becomes zero and beyond solenoid activation is prevented during and sometimes before inappropriate weather and evapotranspiration conditions such as rain snow or freeze application_number US 58310799 A description fig1 illustrates a sample layout of a plurality of typical lawn and garden input and output components surrounding a residential home these components are usually installed prior to adding the weather and e t sensing features afforded by my invention they may be connected as load circuits along with a clock or computer to the rectangular box 1 which encloses the combination sensors the sensors with the enclosure may be mounted to an outside pedestal wall tree or on a the roof of of a nearbye structure but away from the influence of direct sprinkler spray or direct sunlight which can cause distorted weather sensitivity a mounting area which is both shady year around and having a northern exposure is preferrable standard household electrical power 12 is applied to the 24 volt transformer input of the existing irrigation clock or computer 2 the weather sensitive intervention provided by the said combination sensors enclosed in 1 are serially connected to the clock or computer via dedicated wires as a splice 25 between the timer common terminal and its common output wire 16 shared by each solenoid control valve if the timer or computer have two terminals marked u201c sensor u201d the two combination sensor wires may be connected directly to them the dedicated two conductor cable 14 can.