Top 10 Open-Source Alternatives to Forecastly Weather Insights in 2025

Weather insight tools are becoming ever more crucial as we navigate climate change and rely on precise data for daily activities. Here are the top 10 open-source alternatives to Forecastly Weather Insights in 2025, offering a range of free and freemium services:

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1. Open-Meteo

Description: Open-Meteo is a free, open-source weather API providing access to high-resolution weather forecasts. It uses data from national weather services and offers both global and regional weather models.
Hourly Forecasts: Up to 16 days of hourly weather predictions.
High-Resolution Models: Global models with 11 km resolution and regional models up to 1.5 km resolution.
Frequent Updates: Weather models updated hourly for Europe and North America.
Historical Data: 80 years of historical weather data available through the API.
Multiple APIs: Offers Marine, Air Quality, Geocoding, Elevation, and Flood APIs.
License: Free for non-commercial use (Attribution 4.0 International (CC BY 4.0))
Commercial Usage: Paid plans for commercial use are available, starting at €29/month for 1 million requests. Explore Open-Meteo

2. OpenWeatherMap

Description: OpenWeatherMap provides a wide range of weather data through APIs, using crowdsourced data from meteorological broadcast services worldwide. It has a free tier for basic use.
Current Weather Data: Provides real-time weather conditions.
Forecasts: Offers 5-day forecasts with 3-hour intervals in the free tier.
Historical Data: Access to historical weather information.
Weather Maps: Includes weather alerts and interactive weather maps.
Global Coverage: Data from over 40,000 weather stations.
License: Freemium model; free for basic use, paid for higher usage and commercial use. Explore OpenWeatherMap

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3. Weatherbit

Description: Weatherbit offers several APIs for forecasts, historical data, and other weather-related data, including air quality and soil conditions.
Forecast API: Provides weather forecast data.
Historical Data API: Access to past weather conditions.
Air Quality Data: Includes information on air quality parameters.
Soil Data: Offers soil temperature and moisture data.
AI Driven: Uses machine learning to predict the weather.
License: Freemium model, with a free tier for a single API key and paid plans for commercial use. Explore Weatherbit

4. Tomorrow.io API

Description: While not strictly open-source, Tomorrow.io offers a robust weather API, mentioned frequently as a top choice, with a free tier. It provides a large number of data layers and is considered highly accurate.
Real-Time Data: Provides real-time weather updates.
Hyperlocal Forecasts: Offers highly localized weather predictions.
80+ Data Layers: Includes a wide range of weather parameters.
Historical Data: Access to past weather conditions.
Severe Weather Alerts: Provides notifications for severe weather events.
License: Freemium model. Discover Tomorrow.io API

5. Visual Crossing

Description: Visual Crossing provides access to both historical weather records and weather forecast data globally. It has a single API endpoint for simplicity.
Historical Data: Access to past weather data.
Forecast Data: Includes both hourly and daily weather predictions.
Global Coverage: Data available worldwide.
Statistical Forecasting: Offers statistical weather forecasting.
UV Index and Solar Radiation: Provides UV index and solar radiation data.
License: Free for basic usage, with paid plans for higher usage needs. Explore Visual Crossing

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6. Ambee Weather API

Description: Ambee stands out for its ability to provide accurate hyperlocal weather data. It also specializes in environmental data, such as air quality and pollen.
Real-time Local Weather: Provides real-time updates on local weather conditions.
Environmental Data: Includes data on air quality, pollen, wildfires, and natural disasters.
Multiple Parameters: Covers temperature, humidity, wind speed, precipitation, UV index, ozone levels, and more.
Customizable: Offers customizable data and easy JSON integration.
Hyperlocal Data: Provides hyperlocal weather data.
License: Freemium model, with a free trial and paid plans. Learn more about Ambee Weather API

7. Meteomatics

Description: Meteomatics provides a range of weather-related services, including high-resolution commercial weather forecasting. It uses a proprietary European Weather Model with 1 km resolution.
High-Resolution Forecasts: Offers high-resolution weather forecasting.
Multiple Data Sources: Combines data from over 25 weather models.
1800+ Parameters: Provides a wide array of weather parameters.
Historical Data: Access to historical weather data from 1979.
Climate Data: Includes climate scenarios up to the year 2100.
License: Not strictly open source but offers a free plan with limited use. Discover Meteomatics

8. IBM Open-Source AI Model for Weather and Climate

Description: IBM, in collaboration with NASA, developed an open-source AI model for weather and climate applications.
Scalability: Can be used for both short-term weather and long-term climate projections.
Versatility: Can tackle more applications than existing models.
Data Reconstruction: Able to reconstruct global surface temperatures from a small data sample.
Downscaling: Includes fine-tuned versions for data downscaling.
Global Climate Simulation: Improves the spatial resolution of global climate simulations.
License: Open source Explore IBM Open-Source AI Model for Weather and Climate

9. QGIS

Description: QGIS is a free and open-source Geographic Information System (GIS) application. While not solely a weather tool, it can be used to visualize and analyze weather data.
Data Visualization: Enables creating visualizations of weather data through maps and charts.
Geospatial Analysis: Allows geospatial analysis of weather patterns.
Customizable: Offers extensive plugin library for specialized tasks.
Integration: Supports integration with different weather data sources.
Free & Open Source: Completely free with regular updates from the developer community.
License: Open source (GNU General Public License) Explore QGIS

10. Meteum

Description: Meteum is mentioned as providing hyperlocal forecasts and reliable climate data using AI.
Hyperlocal Forecasts: Offers highly localized weather predictions.
Community-Generated Reports: Utilizes data from 3 million community weather reports.
AI Driven: Uses machine learning algorithms to monitor weather parameters.
Alert System: Issues alerts about adverse weather conditions.
User Base: Trusted by 86 million users worldwide.
License: Not strictly open source, but has a free plan. Discover Meteum

This list offers a variety of open-source (or at least freely accessible) alternatives to Forecastly Weather Insights, each with unique features, data points, and levels of access. Be sure to review each option to find the best fit for your needs.

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FAQ

1. What are some alternatives to Forecastly Weather Insights?

Some of the top alternatives include Open-Meteo, OpenWeatherMap, Weatherbit, Tomorrow.io API, and Visual Crossing. Explore Open-Meteo | Explore OpenWeatherMap | Explore Tomorrow.io

2. Which alternatives provide high-resolution weather forecasts?

Open-Meteo and Weatherbit offer high-resolution weather data, with Open-Meteo providing global models with 11 km resolution. Explore Open-Meteo

3. What is the best alternative for real-time weather updates?

Tomorrow.io API and OpenWeatherMap are excellent for real-time updates. Tomorrow.io also provides hyperlocal forecasts. Explore Tomorrow.io | Explore OpenWeatherMap

4. Which service offers comprehensive historical weather data?

Visual Crossing provides extensive historical data, along with statistical forecasting. Open-Meteo also offers 80 years of historical weather data. Explore Open-Meteo

5. Is there an alternative that specializes in environmental data?

Ambee Weather API excels in providing environmental data, including air quality and pollen. Explore Ambee

6. What alternative offers multiple APIs for marine and air quality data?

Open-Meteo offers a range of APIs including Marine, Air Quality, and more. Explore Open-Meteo

7. Which alternative uses AI for its weather forecasts?

Meteum and Weatherbit utilize AI and machine learning for weather predictions.

8. Are there any services that provide severe weather alerts?

Tomorrow.io API provides notifications for severe weather events. Explore Tomorrow.io

9. What is a good free alternative for basic weather forecasts?

QGIS is a free and open-source GIS application that can be used to visualize weather data. Explore QGIS

10. Which alternative integrates well with geographical data?

QGIS supports integration with various weather data sources and offers geospatial analysis. Explore QGIS

About the Author

Violetta Bonenkamp, also known as MeanCEO, is an experienced startup founder with an impressive educational background including an MBA and four other higher education degrees. She has over 20 years of work experience across multiple countries, including 5 years as a solopreneur and serial entrepreneur. She’s been living, studying and working in many countries around the globe and her extensive multicultural experience has influenced her immensely.

Violetta is a true multiple specialist who has built expertise in Linguistics, Education, Business Management, Blockchain, Entrepreneurship, Intellectual Property, Game Design, AI, SEO, Digital Marketing, cyber security and zero code automations. Her extensive educational journey includes a Master of Arts in Linguistics and Education, an Advanced Master in Linguistics from Belgium (2006-2007), an MBA from Blekinge Institute of Technology in Sweden (2006-2008), and an Erasmus Mundus joint program European Master of Higher Education from universities in Norway, Finland, and Portugal (2009).

She is the founder of Fe/male Switch, a startup game that encourages women to enter STEM fields, and also leads CADChain, and multiple other projects like the Directory of 1,000 Startup Cities with a proprietary MeanCEO Index that ranks cities for female entrepreneurs. Violetta created the "gamepreneurship" methodology, which forms the scientific basis of her startup game. She also builds a lot of SEO tools for startups. Her achievements include being named one of the top 100 women in Europe by EU Startups in 2022 and being nominated for Impact Person of the year at the Dutch Blockchain Week. She is an author with Sifted and a speaker at different Universities. Recently she published a book on Startup Idea Validation the right way: from zero to first customers and beyond and launched a Directory of 1,500+ websites for startups to list themselves in order to gain traction and build backlinks.

For the past several years Violetta has been living between the Netherlands and Malta, while also regularly traveling to different destinations around the globe, usually due to her entrepreneurial activities. This has led her to start writing about different locations and amenities from the POV of an entrepreneur. Here’s her recent article about the best hotels in Italy to work from.

About the Publication

Fe/male Switch is an innovative startup platform designed to empower women entrepreneurs through an immersive, game-like experience. Founded in 2020 during the pandemic "without any funding and without any code," this non-profit initiative has evolved into a comprehensive educational tool for aspiring female entrepreneurs.The platform was co-founded by Violetta Shishkina-Bonenkamp, who serves as CEO and one of the lead authors of the Startup News branch.

Mission and Purpose

Fe/male Switch Foundation was created to address the gender gap in the tech and entrepreneurship space. The platform aims to skill-up future female tech leaders and empower them to create resilient and innovative tech startups through what they call "gamepreneurship". By putting players in a virtual startup village where they must survive and thrive, the startup game allows women to test their entrepreneurial abilities without financial risk.

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Marketplace: Buy or sell expert sessions and tutorials

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Since its inception, Fe/male Switch has shown impressive growth:

3,000+ female entrepreneurs in the community
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Partnerships

Fe/male Switch has formed strategic partnerships to enhance its offerings. In January 2022, it teamed up with global website builder Tilda to provide free access to website building tools and mentorship services for Fe/male Switch participants.

Recognition

Fe/male Switch has received media attention for its innovative approach to closing the gender gap in tech entrepreneurship. The platform has been featured in various publications highlighting its unique "play to learn and earn" model.