Zowni is side by side weather comparison app. It compares weather forecast for locations and for dates. You can look into both: future and past weather data.
Main features:
– Search and save your favorite locations
– Select future or past date for left or right
– Compare forecast side by side
– Use color coding for quick glance on weather
– See detailed weather data
– Switch between Celsius and Fahrenheit scale
Weather data is provided by Dark Sky API.