What's the temperature in tropical caves?

Hourly temperature was measured for approximately one year at 17 stations in three caves in Quintana Roo, Mexico. Thirteen of these stations were in the extensive twilight zones of all three caves. All seventeen stations showed seasonality in temperature with a 3 {degrees}C drop during the Nortes season. Two of the caves, Muevelo Sabrosito and Muevelo Rico, showed greater variability during the winter months while in Rio Secreto variability was greatest during the rainy season. Rio Secreto is less open to the surface than the other two. All sites also showed a daily temperature cycle, although it was very faint in some Rio Secreto sites. While temperature variability is diminished relative to surface variation, its temporal pattern is worthy of further study.