Understand hourly rain forecasts, percentages and uncertainty.
Read the forecast period
A daily rain icon does not mean continuous rain all day. Check hourly precipitation, wind and temperature for the specific place and time of your activity. Mountainous and coastal areas can differ from nearby city centers.
Know what probability means
A stated chance of precipitation relates to the likelihood of measurable rain at the forecast location during a period; it is not a direct measure of how intense a shower will be. Check expected amounts and official warnings separately.
Use updates and alerts
Forecast confidence generally changes with lead time and weather patterns. Recheck shortly before travel and follow official severe-weather guidance. A forecast app is useful for planning but should not replace emergency instructions.