The era featured the longest periods with no life forms on earth.

The answer is - Archean.
The Precambrian is the eon before the Cambrian, when the so called life explosion occurred. The Precambrian eon is the earliest part of Earth's history, set before the current Phanerozoic eon. This eon accounts for about 88% of the history of the Earth. It is consisted of three eras, Hadean (no life), Archean (no life), and Proterozoic (life occurred). Both of the two earliest eras do not have life, but Archean is three times longer period than the Hadean, so Archean is the answer.

While winters are rainy, summers are dry. regions with this climate are usually in the eastern part of the continents. they experience hot, humid summers and colder winters. precipitations have a regular distribution throughout the year, but hurricanes are common.