Is the weather forecast in Luoyang one month ten degrees higher after half a month inaccurate?

Not accurate. The weather forecast is only a probability forecast based on the current data and models, which can not completely and accurately reflect the actual situation in the future. Although the weather forecast is obtained by scientific means, there are always some errors in the forecast results due to the complexity of meteorological changes. Especially in the climate transition period such as spring and autumn, the temperature fluctuates greatly, and the prediction difficulty increases accordingly.