# Trend A structure describing an observed pattern in the data for weather at a location for a specific condition. ``` struct Trend where Dimension : Dimension ``` ## Topics ### Instance Properties [`var baseline: TrendBaseline`](/documentation/WeatherKit/Trend/baseline) The manner in which the comparison between the baseline and current values are compared. [`var currentValue: Measurement`](/documentation/WeatherKit/Trend/currentValue) The current recorded value for the condition in which the trend is compared against. [`var deviation: Deviation`](/documentation/WeatherKit/Trend/deviation) Semantically describes the manner in which the observed trend compares the current value against the baseline value. ## Relationships ### Conforms To [`Decodable`](/documentation/Swift/Decodable) [`Equatable`](/documentation/Swift/Equatable) [`Sendable`](/documentation/Swift/Sendable) [`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)