# Percentiles A structure that describes probability distributions for a measurable weather condition. ``` struct Percentiles where Dimension : Dimension ``` ## Topics ### Instance Properties [`var p10: Measurement`](/documentation/WeatherKit/Percentiles/p10) 10% of the distribution is less than this value. [`var p50: Measurement`](/documentation/WeatherKit/Percentiles/p50) 50% of the distribution is less than this value. [`var p90: Measurement`](/documentation/WeatherKit/Percentiles/p90) 90% of the distribution is less than this value. ## Relationships ### Conforms To [`Sendable`](/documentation/Swift/Sendable) [`Equatable`](/documentation/Swift/Equatable) [`Decodable`](/documentation/Swift/Decodable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Encodable`](/documentation/Swift/Encodable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)