Due to my inability to wrap my head around arrays of hashes, I had ended up doing it like this:

        $data_min{"$timestamp"} = $seconds if (!$data_min{"$timestamp"
+});
        $data_min{"$timestamp"} = $seconds if ($seconds<$data_min{"$ti
+mestamp"});
        $data_max{"$timestamp"} = $seconds if ($seconds>$data_max{"$ti
+mestamp"});
        $data_avg{"$timestamp"}+= $seconds;
        $data_counter{"$timestamp"} ++;
[download]

Then I simply looped through the keys of $data_counter and computed averages by dividing $data_avg/$data_counter I'll definetly look at all the suggestions and make use of them. Thanks much.