Boulder WeatherMonday 05/04 100%ThunderstormThunderstorms, accompanied by locally heavy rainfall at times. High 57F. Winds NE at 5 to 10 mph. Chance of rain 100%.Tuesday 05/05 90%ThunderstormRain with thunderstorms by evening. High 58F. Winds NE at 5 to 10 mph. Chance of rain 90%.Wednesday 05/06 60%Chance of a ThunderstormMixed clouds and sun with scattered thunderstorms. High 66F. Winds WNW at 5 to 10 mph. Chance of rain 60%.