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If you do not known what the upper and lower temperatures are in your garden, then little of what I have said above will be of any use and so, all gardeners should have some method of measuring the normal air temperature around the garden, whether through one of the modern electronic weather stations that are so popular these days, or through a good old-fashioned maximum - minimum thermometer, strategically positioned.
In December, Santa Clarita began operating a solar-powered electronic weather station, which transmits information to a statewide database.
THE wind of change is blowing across a company best known for making electronic weather stations.