gistfile1.phtml

function getWeather() {

	if (false === ( $theWeather = get_transient('theWeather') ) ) {
		$xmlUrl = 'http://www.google.com/ig/api?weather=portland&oe=utf-8&';
		$output = wp_remote_fopen($xmlUrl);
		$xmlData  = simplexml_load_string($output);
		
		$conditions = $xmlData->weather->current_conditions->condition['data'];
		
		$raining = array( 'Showers', 'Scattered Showers', 'Chance of Rain', 'Chance of Storm', 'Rain', 'Light Rain' );
		$cloudy = array( 'Overcast', 'Cloudy' );
		$partly_cloudy = array( 'Partly Cloudy', 'Mostly Cloudy', 'Mist', 'Dust', 'Fog', 'Smoke', 'Haze' );
		$sunny = array( 'Sunny', 'Clear', 'Partly Sunny', 'Mostly Sunny' );
		$lightning = array( 'Scattered Thunderstorms', 'Storm', 'Thunderstorm', 'Chance of Tstorm' );
		$snowing = array( 'Rain and Snow', 'Light Snow', 'Freezing Drizzle', 'Chance of Snow', 'Sleet', 'Snow', 'Icy', 'Flurries' );
				
		if ( in_array( $conditions, $raining ) ) :
			$theWeather = 'raining';
		elseif ( in_array( $conditions, $cloudy ) ) :
			$theWeather = 'cloudy';
		elseif ( in_array( $conditions, $partly_cloudy ) ) :
			$theWeather = 'partly-cloudy';
		elseif ( in_array( $conditions, $sunny ) ) :
			$theWeather = 'sunny';
		elseif ( in_array( $conditions, $lightning ) ) :
			$theWeather = 'lightning';
		elseif ( in_array( $conditions, $snowing ) ) :
			$theWeather = 'snowing';
		else :
			$theWeather = 'raining';
		endif;

		set_transient('theWeather', $theWeather, 60*30);
	}

	return $theWeather;
}