Weather App (Tkinter + OpenWeather + OpenMeteo)

A simple Python desktop application to get current and historical weather data for any location using:

• OpenWeatherMap API (for current weather)
• Open-Meteo API (for historical data trends)
• Built with Tkinter and Matplotlib for GUI and visualization
• Supports JSON export and graphical display of past temperature and rainfall

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App Features

• Search weather by place name
• Displays:
  • Cloud cover
  • Humidity
  • Max, Min, and Feels-like temperature
  • Rain (mm/hr)
• Plots 15-day historical temperature and rainfall
• Export JSON weather data
• Built with Python, no heavy external dependencies

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Output Screenshot

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Requirements

Python 3.8+ Required.

Install required packages:

pip install -r requirements.txt

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API Key Setup

1. Sign up and get a free API key from OpenWeatherMap.

2. Create a .env file in the root of your project:

   API_KEY=your_api_key_here

3. The app will read this key using python-dotenv.

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How to Run

1. Clone this repo:

   git clone https://github.com/LN-simhan/weather-app.git
   cd weather-app

2. (Optional) Create and activate a virtual environment:

   python -m venv venv
   source venv/bin/activate  # Linux/macOS
   venv\Scripts\activate     # Windows

3. Install dependencies:

   pip install -r requirements.txt

4. Run the app:

   python app.py

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Project Structure

weather-app/
│
├── app.py                  # Main application code
├── requirements.txt        # Required dependencies
├── .env                    # API key (To be created)
├── README.md               # This file
└── output/
    │
    ├── data.json               # Current weather data retrieved from API
    └── weather_data.json       # (Will be generated if downloaded) Sample Output file 

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Tech Stack

• Python 3.x
• Tkinter (GUI)
• Matplotlib (plots)
• OpenWeatherMap API
• Open-Meteo API
• pandas, requests, dotenv

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Notes & Limitations

• Place lookup is done using Photon (Komoot)
• Open-Meteo provides free historical weather without API keys. (Free for non-commercial use with rate limiting)
• Rainfall and temperature data is approximate for the given coordinates

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License

This project is open-source and free to use under the MIT License.