Comment by maxmouchet

It works by querying a specific DNS resolver (dns.toys):

  dig +short TXT mumbai.weather @dns.google
  # NXDOMAIN
 
  dig +short TXT mumbai.weather @dns.toys  
  "Mumbai (IN)" "30.90C (87.62F)" "45.90% hu." "clearsky_day" "15:30, Sun"
  "Mumbai (IN)" "28.10C (82.58F)" "56.00% hu." "fair_day" "17:30, Sun"
  ...