Unable to locally verify the issuer's authority using wget command

When i try to get response from the https://www.google.com using the gnuwin32 command ‘wget.exe’, i am getting the error “Cannot verify www.google.com’s certificate, issued by Google Inc” and “Unable to locally verify the issuer’s authority”.
The same error repeats for the yahoo and verisign websites.
Example: wget.exe https://www.google.com
–2014-07-18 23:55:33– https://www.google.com/
Resolving www.google.com… 74.125.236.211, 74.125.236.210, 74.125.236.209, …
Connecting to www.google.com|74.125.236.211|:443… connected.
ERROR: cannot verify www.google.com’s certificate, issued by `/C=US/O=Google Inc
/CN=Google Internet Authority G2′:
Unable to locally verify the issuer’s authority.
To connect to www.google.com insecurely, use `–no-check-certificate’.
Recommended to watch: How to download and install GnuWin32 packages in Windows 8.1 – https://www.youtube.com/watch?v=T9yFxM19c2Q

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