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At present, there are two types of verification of platinum resistance temperature sensors in automatic meteorological stations in China,i.e., onsite verification and laboratory verification. As instructed in the related verification regulations (JJG (Meteorology) 0022015 Platinum Resistance Temperature Sensor of Automatic Weather Station), onsite verification and laboratory verification are separately performed for the same platinum resistance temperature sensor, and the measurement uncertainty is determined using the GUM (Guide to the Uncertainty in Measurement) method based on the results of both types of verification. The result shows that the uncertainty evaluation of onsite verification is higher than that of laboratory verification. The causes of differences in measurement uncertainty between the two types of verification are analyzed. It is suggested that the laboratory verification should be used in the verification of platinum resistance temperature sensors for automatic meteorological stations.