Yes and no.

You can read an environment, but as cron jobs run their own environment, you need to load the environment you want. See Get default login environment.

Thanks for the heads up. I'm a bit confused though. In he example you link to do I need to change the rest of my script or does $ENV get overwritten by the function? Do I just call %ENV = (%ENV, get_login_env()); and continue as I did before With my $varname = $ENV{'ENV_VAR_NAME'};? Thanks

You can access environment variables in a script run as a cron job but take note that cron jobs often have only a sub-set of the environment available to a user shell. For instance, you will likely have a minimal $PATH under cron. It might be worth writing a small script to dump the environment to a file then run it as a cron job to see what's available.

I hope this is helpful.