How do soil moisture values change throughout a year?
Soil moisture values are highest during the rainy season, and furthermore when the temperature is lower which results in reduced evaporation rates. This period varies throughout the year depending what climate and which hemisphere you live in. For example, in the American Southwest the majority of the precipitation occurs during two periods, during the winter and the summer monsoon season. Soil moisture values are highest during the winter when evaporation rates are low. In an average year, after the winter rainy season, soils slowly dry out until the summer monsoon season when the soil begins to wet up again.
