Under DHHS regulations, the acceptable temperature range is 90-100F, which is measured at the specimen cup.
Ive emphasized the phrase "at the specimen cup" because you have to factor in the "temperature drop" when transferring the sub sample from the bottle and into the specimen cup.

For details on temp drop, read post #3 in this thread:
http://boards.cannabis.com/drug-test...ml#post2230159