Wireless sensor networks have gained significant traction in environmental signal monitoring and analysis. For a battery powered system, the lifetime of the system typically depends on the frequency at which environmental phenomena are monitored. If energy harvesting is added to provide indefinite lifetime, then the size and cost of the energy harvesting hardware is similarly affected by the sampling frequency. Typically, each data sample requires the node to wake up from a low-energy sleep mode. If sampling rates are reduced, then the node duty cycle can be reduced, and energy can be saved. This is particularly true when the measured quantity has slow dynamics, such as temperature. Using empirical datasets collected from iv