This changelog highlights major Timeline Weather API additions and behavior changes. Unless explicitly noted, changes are designed to preserve backwards compatibility.
2026
Q3
- Retrieve individual weather forecast models – retrieve individual forecast models through the Timeline Weather API.
- Weather Forecast Confidence and Spread – include weather forecast confidence and spread data to understand how well forecast models agree.
- Wildfire events – identify nearby wildfire activity, measure distance and intensity, and investigate recent fire events.
- Expanded astronomy fields – include twilight information on your requests.
Q2
- MCP Server (Model Context Protocol) — MCP server for AI assistant integration.
- Multiple API key support – see the documentation.
- Historical Weather Forecast API – the new Historical Forecast API offers even easier access to our Historical Weather Forecast models.
Q1
- New Weather Maps API.
2025
Q4
- Low Latency Endpoint – the new timelinellx endpoint provides ultra low latency responses for forecast queries. Perfect for apps, IoT and other embedding.
- Significantly updated Query Builder to improve ease of use, expanded features
- New flatjson output format in the weather API to provide highly optimized dataset for improved performance.
- Improved ability to modify the list of weather elements retrieved in the weather API
Q3
- New AI-based Code generator to allow users to create working code to retrieve weather data in any programming language.
- Improved real-time weather dashboard to show additional mapping, radar-sourced precipitation.
- Improved city look up location geocoding.
Q2
- Expanded weather alert providers in Asia and South America.
- Expanded support for very large datasets of billions of rows.
Q1
- New APIs to allow programmatic modification, submission and data downloading of stored datasets.
- Ability to include different date and time ranges per locations in stored datasets.
- Additional historical data directly loaded from Meteo France for French locations.
2024
Q4
- Ability to include sub-hourly data in the Timeline Weather API with minute intervals.
Q3
- Ability to include radar precipitation data directly into the datasets to provide radar based precipitation amount and intensity estimates.
- Multiple location support in the Timeline Weather API moved from beta status to full support.
Q2
- Reimplementation of weather alerts for the United States, Canada and European continent to improve the speed of availability and improve geographical accuracy when the weather server provider includes geometry-based alerts.
- Air Quality data in the Timeline Weather API moved from beta status to full support.
Q1
- Expanded historical data for the Advanced solar elements and wind elements back to January 1st 2015.
- Expanded historical data for the Advanced agricultural elements back to January 1st 2015.
- Release of updated maritime wave and swell data with historical data back to January 1st 2015.
2023
Q4
- Beta release of updated maritime wave and swell data with historical data back to January 1st 2015.
- Multiple location support in the Timeline Weather API
Q2
- Release of new UV index forecast data.
Q1
- Release of new Air Quality data including both US AQI and European AQI
- Improvements to moon phase and other astronomical elements.
2022
Q4
- Expanded weather forecast model support including GDPS, ICON D2, HRRR sub hourly.
Q3
- Expanded bulk query download and schedule to improve performance and support new energy, agricultural and historical forecast queries.
Q2
- Release of agricultural and soil elements, degree days and evapotranspiration.
Q1
- Release of expanded solar energy elements including historical data from 2020 onwards. Elements include direct normal, diffuse normal, global horizontal and global tilt radiation
- Release of higher elevation wind elements at 50, 80 and 100 meters height.
- Increased weather forecast model resolution to 2km
2021
Q4
- Support for historical forecast – request weather forecasts that were created in the past.
- Degree Days in the Timeline Weather API – include growing degree days, heating degree days and cooling degree days in the API response.
Q3
- Support for requesting weather data by station ID
- Improvements to Time zone lookup
Q2
- Expanded weather description elements
- New icon keys and expanded sample icons
Q1
- Expansion to supported weather alerts
- Added and expanded weather elements including precipitation type and feels like.
2020
Q4
- Expand weather normals support in API.
- Full language support in API.
- Ability to contribute changes to languages.
Q3
- Full support for creating, editing and testing API queries in Query Builder
- Download and schedule multiple location Timeline API Queries.
Q2
- Release of Timeline Weather API that provides a single, seamless API for retrieving historical weather data and weather forecast data.
- Expansion of historical weather data and sub-hourly historical weather data sources.
- Release of initial usage documentation and sample code for Java, Python and other languages.
- Initial version of our Visual Crossing open source Github repository for icons, languages and sample code.