---
title: "Introduction to Solargis Time Series and TMY API"
slug: "solargis-time-series-and-tmy-api"
description: "Access accurate solar radiation and meteorological data globally with Solargis TMY and Time Series API for effective solar energy project assessments."
tags: ["evaluate", "time series data", "TMY data"]
updated: 2026-11-04T11:36:28Z
published: 2026-11-04T11:36:28Z
canonical: "kb.solargis.com/solargis-time-series-and-tmy-api"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.solargis.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction to Solargis Time Series and TMY API

**In this document**

You'll learn about the Solargis Time Series and TMY API services for accessing solar radiation and meteorological data worldwide: TMY API details (15-minute/60-minute resolution, generated from multi-year Time Series, P50-only scenarios, REST API with two-part generation/polling process) and Time Series API details (sub-hourly to yearly resolution, historical data from 1994 depending on region, global coverage excluding polar regions), plus tips on integrating TMY data into PVSyst via API token.

## Overview

With the **Solargis Time Series and TMY data API**, you can directly access accurate solar radiation and meteorological data for any location worldwide. This powerful tool lets you retrieve data at sub-hourly intervals and various aggregations, giving you everything you need for solar energy project assessments, system design, and yield estimation.

Key features include:

- **Data Flexibility**: Access to solar and meteorological parameters in multiple time aggregations.
- **Integration Capabilities**: Seamless integration with existing systems for automated data access.
- **Comprehensive Data Access**: Historical data for effective analysis.
- **User-Friendly Interface**: Easy integration into customized solutions for enhanced decision-making.

Both services offer various subscription tiers to accommodate a wide range of use cases. Detailed specification of each subscription tier, the parameters, and temporal resolutions they provide are listed in the respective subscription tier detail documents ([Solargis TMY API](/v1/docs/tmy-subscription-details), [Solargis TS API](/v1/docs/time-series-subscription-details)).

Apart from the Time Series and TMY API, suitable for investigation of historical data and yield simulation, we also offer the [Monitor and Forecast API](/v1/docs/monitor-forecast-api-services), which provides operational and forecast data, suitable for monitoring and planning purposes.

## TMY data API

The Solargis **TMY data API** provides users with TMY data tailored for specific geographical locations. Key parametric facts include:

- **Temporal resolutions**: TMY data is available at 15-minute and 60-minute intervals.
- **Data generation**: TMY is derived from multi-year time series data, ensuring statistical accuracy and representativeness (Figure 1).
- **Usage in PV simulation**: The API facilitates easy integration with PV simulation software, providing up to 8760 hourly values for energy simulations.
- **Probability scenario**: TMY files are generated for P50 scenarios only.
- **API structure**: The API operates as a REST API using JSON requests, with a two-part process for data generation and status polling. Access requires a subscription and authentication via API tokens.

![](https://cdn.document360.io/ae2d502f-6c0d-4865-a68e-43ad8da61149/Images/Documentation/image-1783941649964.png?sv=2026-02-06&spr=https&st=2026-11-07T22%3A48%3A27Z&se=2026-11-07T23%3A48%3A27Z&sr=c&sp=r&sig=0Dx%2Fdf%2FlwmTY%2FqbJd7QpFwYNMXCnkLttgg0ON2NhxjI%3D)

***Figure 1****: An illustration of TMY data generation from the Time Series.*

> **Tips**:
> 
> - More details about the TMY API, endpoints, and request parameters are in the [TMY API documentation](https://kb.solargis.com/apidocs/solargis-tmy-api-integration-setup).
> - If you want to load theTMY data into PVSyst via API, learn how to import the API token into PVSyst [here](https://www.pvsyst.com/help-pvsyst7/meteo_import_solargisapi.htm).

## Time Series data API

The Solargis **Time Series data API** provides precise solar radiation and meteorological data for any location worldwide. Key parametric facts include:

- **Time resolution**: Supports sub-hourly intervals, including 15 minutes, 1 hour, 1 day, 1 month, and 1 year.
- **Historical data availability**: Full historical data is available from 1994, depending on the region (Map 1).
- **Geographic coverage**: Global coverage, excluding polar regions (Map 1).
- **API customization**: Users can specify location (latitude/longitude), time range, and time resolution to retrieve tailored data.
- **Data quality**: The API offers validated, high-precision data derived from reliable scientific satellite models, ensuring site-specific accuracy.
- **Integration capability**: Seamless integration into internal applications and commercial PV simulation software for improved decision-making.
- **Use cases**: Ideal for solar energy project site assessment, project design, and energy yield estimation.
- **Harmonized data source**: Provides a unified source of data throughout the solar project lifecycle, reducing errors associated with fragmented datasets.

[Solargis Prospect and Evaluate Coverage by Year Map](https://storymaps.solargis.com/prospect-years)

***Map 1:*** *The Time Series coverage map.*

> **Tip**: You can learn more details about the Time Series API, endpoints, and request parameters in the [Time Series API documentation](https://kb.solargis.com/apidocs/solargis-ts-api-integration-setup).