I store portland cement in plastic bags in sealed 5 gallon pails. Billie

Mine goes bad all the time...:O)

Temperature will not make concrete go bad. Bulk cement is stored in siolos even in the north country and it does not affect it. Moisture will! IF you live in a damp climate or do not store the cement in a cool dry place it can take on moisture. The worst thing to put cement in is a plastic keeper then put it in a garage with direct sun. If you open it a few times then close it up for a month or two, the moisture can cause the cement to set. I DO put mine in a plastic tote and it keeps for 1-2 months during the summer and over the winter. However, I fill the tote full before I store it during the winter. Also steel 5 gallon buckets with steel lids keep cement. I have some additive color I have had for over 8 years in a steel bucket that is still good. THe trick to storing cement is keeping it dry. Do not have it in direct contact with the ground or a concrete floor.
Hope this helps.
K

One time my cement went so bad it started mugging the neighbors.:)