On average, the air is driest around September 28 th, when the relative humidity can drop below 66% three days out of four. On the other hand, the air is likely to be most humid around September 23 rd, where relative humidity levels can rise above a very humid 87% three days out of four.
Green cards are valid for 10 years for permanent residents, and 2 years for conditional permanent residents. After this period, the card must be renewed or replaced. Cards issued between January 1977 and August 1989 do not have document numbers or expiration dates and are valid indefinitely.
Green Cards need to be renewed every 10 years and Form I-90 is used to renew these documents. Form I-90 can also be used to replace a Green Card.