15, that's the actual temperature, but with the wind chill it feels like minus 20.

15，那是实际温度， 但加上风寒， 感觉就像负 20 度。

By comparing forecasts from 2017 to the actual temperatures that were recorded, I found that, as you'd expect, the forecast gets more accurate the closer you are to the actual date.

通过将 2017 年的预测与记录的实际温度进行比较，我发现，正如您所期望的那样，越接近实际日期，预测就越准确。