Rain-attenuation and cross-polarization models for millimeter-wave propagation are discussed and compared with measurements in the various countries. Rain-rate conversion model which converted <$ au$minutes rain-rate data to one minute rain-rate data, which is applicable for domestic environments are also discussed. Using the converted domestic rain-rate data, probability distributions of rain attenuation and cross-polarization discrimination are computed for various models, and the results are compared with each other.