UILabels are showing the placeholder text instead of plist data

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var currentTemperatureLabel: UILabel?
    @IBOutlet weak var currentHumidityLabel: UILabel?
    @IBOutlet weak var currentPrecipitationLabel: UILabel?


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        if let plistPath = NSBundle.mainBundle().pathForResource("currentWeather", ofType: "plist"),
        let weatherDictionary = NSDictionary(contentsOfFile: plistPath),
        let currentWeatherDictionary = weatherDictionary["currently"] as? [String: AnyObject]{

            let currentWeather = CurrentWeather(weatherDictionary: currentWeatherDictionary)

            currentTemperatureLabel?.text = "\(currentWeather.temperature)º"
            currentHumidityLabel?.text = "\(currentWeather.humidity)%"
            currentPrecipitationLabel?.text = "\(currentWeather.precipProbability)%"

        }

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

import Foundation

struct CurrentWeather {

    let temperature: Int
    let humidity: Int
    let precipProbability: Int
    let summary: String

    init (weatherDictionary: [String:AnyObject]) {
        temperature = weatherDictionary["temperature"] as! Int

        let humidityFloat = weatherDictionary["humidity"] as! Double
        humidity = Int(humidityFloat * 100)

        let precipFloat = weatherDictionary["precipProbability"] as! Double
        precipProbability = Int(precipFloat * 100)

        summary = weatherDictionary["summary"] as! String
    }

}