Update June 2021
The data for rainfall can be displayed either as an annual chart or by each year with monthly totals. This hopefully provides a "comparative picture".
A point to note is that rainfall is generally localised, so while one area may get 2 or 3 centimetres of rain, another may get little or nothing. Over a year it tends to average out.
The data for each PWS in the area is uploaded generally to Weather Underground. A list of the ones in the Chiang Rai town area can be found in the Weather section or the Links.
To view the detailed PWS rainfall data in the Mae Yao area ( near Baan Ruammit ) click on an image of your choice.