Weather apps - which are the most accurate?

[Pudsey Bear]

This one seems to be close but you will never get absolute certainty, just best guess or prediction by looking at cloud formation and wind speed/direction.

Weather Radar: Forecast & Maps - Apps on Google Play

Live hyperlocal forecasts, weather maps, storm tracker, alerts, radar, & more

play.google.com

The nearest you can get is the stone on a string, never fails.