When we look at NASA's temperature records:
We can see his comment about the 1930's has nothing to do with reality. As far as his 15th century comment well this is from the National Academy of Sciences opening statement:
A lot of skeptics will focus on the "less confidence" part but obviously they are taking things out of context. Amazingly nobody on Fox challenged Inhofe's statements.
3. It can be said with a high level of confidence that global mean surface temperature was higher during the last few decades of the 20th century than during any comparable period during the preceding four centuries. This statement is justified by the consistency of the evidence from a wide variety of geographically diverse proxies.
4. Less confidence can be placed in large-scale surface temperature reconstructions for the period A.D. 900 to 1600. Presently available proxy evidence indicates that temperatures at many, but not all, individual locations were higher during the past 25 years than during any period of comparable length since A.D. 900. The uncertainties increase substantially backward in time through this period and are not yet fully quantified.
National Academy of Sciences, High Confidence in Surface Temp Reconstructions Since A.D. 1600