Humid heat is significantly harder to sleep in than dry heat at the same temperature. The same cooling blanket that works well in a dry climate needs different properties to be equally effective in a humid one. Here is what to look for.
Why Humidity Makes Everything Worse
In humid conditions your body's natural cooling mechanism, sweating, works less efficiently because the air is already saturated with moisture. Sweat does not evaporate quickly. The cooling effect of sweating is dramatically reduced. The result is that you feel hotter at the same temperature than you would in dry air and the damp clammy feeling against your skin makes everything more uncomfortable.
What Matters Most in a Humid Climate
Moisture wicking is the most important property for humid conditions. The blanket needs to draw moisture away from your skin and allow it to evaporate outward through the fabric. Nylon cooling fiber excels here. It draws sweat away from the skin immediately rather than letting it sit against you.
Breathability is equally important. The fabric structure needs to allow airflow through the weave rather than creating a sealed humid environment against your skin.
Our Recommendation for Humid Climates
The Stillwell Cloud, 100% nylon, high moisture-wicking, lightweight. The combination of thermal conductivity and moisture management makes it the best choice for humid summer nights. See The Cloud here.
Adding a quiet fan to move air across your body accelerates evaporative cooling significantly in humid conditions. See fans on Amazon here.