Abstract: Based on the current situation of shortrange climate prediction, some parameters for assessment of forecast effectiveness are proposed. Using these parameters, the forecast results of anomalous percentage of precipitation and anomaly of mean temperature for monthly, seasonal and interannual scales during the last 20 years in NCC are evaluated. It is shown that the forecasts of temperature is better than those of precipitation for monthly scale, the forecasts of precipitation are better in spring than those in winter and summer for interannual scale, and the forecasts of precipitation for rainy season have a remarkable improvement.