A wireless sensing device for environmental monitoring of a location is provided. The sensing device includes an electronic system and a housing for securing and protecting the electronic system in a cavity therein. The housing includes a vented top portion defining the cavity, and a wicking base portion including wicking material attached to and covering an exposed underside of the top portion. The electronic system includes: a temperature and humidity sensor for sensing a current temperature and humidity of the location and converting the sensed temperature and humidity to temperature and humidity signals; a wireless transmitter for periodically wirelessly transmitting the temperature and humidity signals from the location to an external computing device; an alerting device for providing an audible, visual, or tactile signal from the location in order to alert a user of a condition of interest; and a microcontroller for controlling the electronic system devices.