How much is a lot of rain for one month?

A lot of rain for one month can vary significantly depending on the region. In general, areas that receive over 4 to 6 inches (100 to 150 mm) of rain in a month might be considered to have a lot, particularly in drier climates. In tropical regions, however, monthly totals can exceed 10 inches (250 mm) without being unusual. Ultimately, what constitutes "a lot" is relative to local climate norms.