Precipitation data is typically given in centimeters, as is temperature data, which is usually given in degrees Celsius.
The amount of years' worth of data represented on a climograph is not always predictable, as it depends on the data available for the particular region being studied.
Agriculture in and around Terre Haute, Indiana does not generally require irrigation due to the amount of precipitation the region receives, which is sufficient for agricultural needs. However, agriculture in Cape Town, South Africa may need to be irrigated, due to the lower levels of precipitation and the fact that the region lies in the Southern Hemisphere, outside of the tropics.
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