Unknown, as Greek myth does not give birth dates to deities.
Artemis is both a immortal and ageless, so has no clear age date.
Artemis never married. She was a virgin goddess.
They never give an exact number but in the Artic Incident it did say that Artemis had caused "several psychiatrists" to retire.
Artemis was worshiped by the Ancient Greeks during the Bronze Age.
Artemis and Apollo are twins, the children of Leto and Zeus, so they don't have much of an age difference. Most myths say that Artemis was born about one day before Apollo.
Artemis was depicted as slender, so she was about the average weight of a young women. Since the Greeks did not have any way to weigh themselves, they would not think to think of an exact measure for their gods. So we can not know her exact weight.
They had designs and builders, as we do today - otherwise, it is not recorded how, the Temple of Artemis was old in the Bronze Age.
Greek goddesses or any god in particular does not age. Some arts depict Artemis in her mid to late 20's.
Ancient Greek, Bronze Age.
From out of the Bronze Age till 401 AD.
The site was occupied by people prior to the Bronze Age, there is no agreed upon date in which worship at the Temple of Artemis began.
Artemis was depicted as a tall and slender girl. Since the Greeks did not have any way to measure themselves, they would not think to think of an exact measure for their gods. So we can not know her exact height.