iOS 15 Weather App UV Index Graph Updates

With the release of iOS 15, Apple completely redesigned its native Weather app, replacing basic data lists with rich, modular information cards. Among these enhancements, the Ultra-Violet (UV) Index display received significant graphical and functional updates, transforming from a static numerical readout into an intuitive visual gauge with dynamic, real-time sun safety recommendations.

Dedicated Modular Card Layout

Prior to iOS 15, the UV Index was relegated to a simple row of text at the bottom of the screen. In iOS 15, the metric received its own dedicated card within the modular dashboard grid. This card provides prominent, glanceable data without requiring users to scroll through dense text lists.

Visual Gradient Progress Bar

The centerpiece of the updated UV Index card is a continuous, horizontal color-gradient gauge. This bar visually represents the standard World Health Organization (WHO) scale, ranging from low (green) to extreme (purple). A distinct marker slides along this bar to indicate the precise current UV level relative to the entire daily spectrum, allowing users to instantly evaluate sun risk visually rather than relying solely on a raw number.

Actionable Sun Protection Timelines

Directly beneath the numerical score and the graphical bar, the iOS 15 update introduced contextual guidance. Instead of merely labeling a score as "High" or "Low," the interface offers specific protection windows, displaying messages such as "Use sun protection until 17:00." This dynamic guidance calculates when the UV index will drop back down to safe levels (typically below 3), assisting users in planning outdoor activities.

Peak UV Level Tracking

The updated module also contextualizes current exposure by indicating when radiation will be strongest. The card explicitly notes the day's projected maximum level—for instance, "Peak UV 8 at 13:00"—helping users distinguish between current conditions and impending midday exposure.