$weather_archive{'2003'}{'Spring'}{'Apr'}{'15'}{'High'} = '70f';
$weather_archive{'2003'}{'Spring'}{'Apr'}{'15'}{'Low'} = '43f';

##</code><code>##

%weather_archive = ( 2003 => {
                         Spring => {
                             April => {
                                 15 => {
                                     High => '70f',
                                     Low  => '43f',
                                     Wind => 'NW15kt',
                                     Bar  => '29.85+'
                                 }
                             }
                         },
                      2004 => ......,
                     );