Fig. 7: Historical monthly/annual mean relative humidity variations (from 1980 to 2020).

The blue line connects the data points along the time series, and the horizontal axis represents only decades. A significant correlation between the mean relative humidity and year is illustrated by solid lines (Spearman correlation, p < 0.05) and is not significant with dashed lines. JAN January; FEB February, MAR March, APR April, MAY May, JUN June, JUL July, AUG August, SEP September, OCT October, NOV November, DEC December, ANN annual.