Don't get me wrong, error handling is verbose and annoying, but not even displaying actual error is just horrible coding practice.

should be at the very least

    err = json.Unmarshal(weatherBody, &WeatherRes)
    if err != nil {
        fmt.Printf("error decoding weather json: %s\n",err)
 return
    }

    err = json.Unmarshal(weatherBody, &WeatherRes)
    if err != nil {
 return fmt.Errorf("error decoding weather json: %s\n",err)
    }