Add world map background to contour plot

I have Relative Humidity data (Excel file attached below) having latitude and longitude.

I want plot similar to--

This plot have other parameter.

Answer 1

[KSSV]

[num,txt,raw] = xlsread('lat lon data.xlsx') ; 

lon = num(1,2:end) ; 
lat = num(2:end,1) ; 
data = num(2:end,2:end) ; 

pcolor(lon,lat,data) 
shading interp
colorbar

To add a map..yoou need to have that data..