java - ggplot-month wise subplot-order of month is not in sequence

Question

在此处输入链接描述这是我的代码：

data<-read.csv("D:/wggplot.csv", header=TRUE)

ggplot (mydata, aes(x = Temp, y = growh, color = Month)) + geom_hex() +
  facet_wrap(~Month) + geom_smooth(method = "lm")  + theme_gray(20) + labs(y = "growth")

这会将月份按字母顺序排列在图中。如何更改我的代码以按时间顺序获取月份？