Demographic of requesting WeatherCondition

Hi Community, 

I'm trying userContexSystem for fetching weather information and then work on that. 

With some testing, I'm seeing that for many cases the weather information is not being fetched for some users while testing on my phone I can see it working totally fine. 

my script goes like this 

global.userContextSystem.requestWeatherCondition(function(weather) {

   global.logToScreen(weather);
  // switch case statements to execute based on weather conditions.

});

For this, it fails to log the weather information on the screen indicating that the function is not being executed. 

Any kind of quick help would be appreciated. 

Also, if the community knows any best practices and can share - to test such user contextual system over different conditions would be amazing. 

Thanks