Setting the timeout in the WeatherApp component to constantly pull weather data.

WeatherAppSetTimeout.js

class WeatherApp extends React.Component {
  updateTimeout;
  
  componentDidMount() {
    this.getWeatherData();
  }
  
  getWeatherData = async () => {
    await this.props.getWeatherData();

    this.updateTimeout = setTimeout(this.getWeatherData, 30 * 1000);
  }
  
  componentWillUnmount() {
    clearTimeout(updateTimeout);
  }

  render() {
    return (
      <div>
        {this.props.weatherData}
      </div>
    );
  }
}