To get your free OpenWeatherMap API key, follow these steps:

1. Go to the OpenWeatherMap website.
2. Create an account or log in if you already have one.
3. Navigate to your account dashboard.
4. Look for the "API keys" section (usually labeled as "API keys", "My API keys", or similar).
5. Generate a new API key if you don't have one already.
6. Copy the API key.
7. Paste the API key into the "API Key" field in the settings here.

Keep your API key secure and do not share it publicly.