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Under the Köppen Climate Classification climate classification, "dry-summer subtropical" climates are often referred to as "Mediterranean". This climate zone has an an average temperature above 10°C (50°F) in their warmest months, and an average in the coldest between 18 to -3°C (64 to 27°F). Summers tend to be dry with less than one-third that of the wettest winter month, and with less than 30mm (1.18 in) of precipitation in a summer month. SMany of the regions with Mediterranean climates have relatively mild winters and very warm summers.
The Köppen Climate Classification subtype for this climate is "Csb". (Mediterran Climate).
The average temperature for the year in Riversdale is 53.1°F (11.7°C). The warmest month, on average, is August with an average temperature of 67.6°F (19.8°C). The coolest month on average is December, with an average temperature of 40.0°F (4.4°C).
The highest recorded temperature in Riversdale is 107.0°F (41.7°C), which was recorded in August. The lowest recorded temperature in Riversdale is 66.0°F (18.9°C), which was recorded in December.
The average amount of precipitation for the year in Riversdale is 38.0" (965.2 mm). The month with the most precipitation on average is November with 7.6" (193 mm) of precipitation. The month with the least precipitation on average is August with an average of 0.4" (10.2 mm). There are an average of 170.0 days of precipitation, with the most precipitation occurring in November with 24.0 days and the least precipitation occurring in August with 2.0 days.
In Riversdale, there's an average of 1.0" of snow (0 cm). The month with the most snow is February, with 0.6" of snow (1.5 cm).