请回答日本东京的平均气温，格式要求输出为一个JSON格式的对象，包含月份和该月的平均气温值。
user
```json
{
  "January": 5.2,
  "February": 5.7,
  "March": 8.7,
  "April": 13.9,
  "May": 18.2,
  "June": 22.2,
  "July": 25.3,
  "August": 26.9,
  "September": 22.8,
  "October": 17.5,
  "November": 11.5,
  "December": 7.0
}
```
assistant