Common formatter for all my child class with same name

I have a service that calls different providers of weather. I use a class to keep some data in common.

class Weather {
 providerName = ''
 constructor(providerName) {
  this.providerName = providerName
} 

class OpenWeather extends Weather {
   getTodayTemperature: () => this.get('http://openweather.com/weatherToday.......')
}


class TomorrowWeather extends Weather {
   getTodayTemperature: () => this.get('http://tommorow.io/weather.......')
}

The different APIs return data with different structures (normal) but all I want is to have way to format all getTodayTemperature function in all my child classes with the same structure.

Expected Result
{
 morning: 26,
 evening: 32
}

So for each return api i want to call a function

formatTemperature(morningNumber, eveningNumber)

Do you have a solution or another way to organize the code?

Thanks.