World Weather & Climate Information. Average monthly weather in Tokyo, Japan. The former city of Tokyo and the majority of mainland Tokyo lie in the humid subtropical climate zone with hot humid summers and generally mild winters with cool spells. Annual rainfall averages nearly 1,530 millimetres (60.2 in), with a wetter summer and a drier winter.
Replied on 04/19/2011. Most dogs have their first heat cycle at about 6 to 9 months, so I assume you mean months in your question not years. Female dogs are in heat for a period of 3 to 4 weeks.
Female dogs do not have periods per se, but they do go through a regular heat cycle if they have not been spayed, or desexed. The average heat cycle for a dog is anywhere from 1 week to 4 weeks in length.The time between heat periods is usually around seven months but can vary from every 4 months to once a year.  Average times between heat periods is seven months but some dogs  can cycle as early as every 4 months, some once a year.    Lengths of heat cycles and intervals between cycles are different  for each dog but most dogs hit somewhere close to the averages.