Context: Today ( April 17 ) I left my trailer expecting the usual roasting sun and temps - we had a steady climb into the 90s last week . Instead , I found this : The temperature must have fallen 20 or 25 degrees overnight . It is quite pleasant . The dust has an odor that 's not completely an odor : it 's like walking into a woodworking shop where someone is using a very fine grit power sander .

Question: What may have caused the weather to be pleasant ?
Options:
0. The temperature was in the pleasant 90s .
1. It cooled down to 20 degrees .
2. It cooled down .
3. None of the above choices .
Answer: 2