Most of the data sheets from Fuji or Kodak that I have collected either do not specify an actual temp (in the case of the Kodaks) or (in the case of the Fuji colour sheets) they generally suggest below 10C or below 0C for long term storage. The Fuji B&W sheets generally don't mention a specific temperature. Ilford on the other hand (taking a quick look at the FP4 Plus; Pan F Plus; and Delta 100 sheets) simply recommend storing in a cool under 20C or 10C. My own conclusion from this is that storage below 10C is less critical for B&W films than some colour types but equally that below 0C will not harm them; I keep all type in my household freezer without problems so far.Black and white, slow speed. 80 ASA, etc.
Regards
Brett