Perhaps you are looking for an over-complicated data structure. But please ignore this if it's not applicable. What I would do with the data you have shown us is create a simple hash, with the keys equivalent to your 'description' and the values, er.. equivalent to your 'value's:

use warnings;
use strict;

my @fields = ( 'temperature in Celsius',
               'relative humidity in %',
               'pressure in millibars %',
               'dewpoint in degrees Celsius',
               'total column ozone in Dobson Units',
             );
my @values = qw ( 23 56 1008.1 4 344 );
my %hash;
@hash{@fields} = @values;

# Print the whole thing:
print "$_: $hash{$_}\n" for keys %hash;

# Print one element:
print $hash{'temperature in Celsius'};
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But perhaps you have a reason for making it more complicated?

dave