I think I went a bit cooler than that unfortunately. We went away for 2 weeks in Feb and was probably more like 10-12c, no high. Likely would have been ok if kept drier.
Annoying as I thought I worked out a good culture for it as I have it mounted on some wicking fabric and sat in a glass jar. During summer it's blasted with sun & moisture, which led to it growing that much larger pseudobulb last year.
Anyway, fingers crossed on its survival!