From Wiktionary, the free dictionary
From super- + humid.
superhumid (not comparable)
- More than usually humid
2015 September 17, “Rhinos in the Parks: An Island-Wide Survey of the Last Wild Population of the Sumatran Rhinoceros”, in PLOS ONE[1], →DOI:Based on these categories, 90% of Sumatra consists of very humid, superhumid and hyperhumid bioclimates.