PyOWM is a Python wrapper library for the OpenWeatherMap web APIs, providing easy access to current weather conditions, forecasts, and historical weather data for various locations worldwide. It is currently at version 3.5.0 and actively maintained, with updates typically released to support new OpenWeatherMap API versions, features, and Python compatibility requirements.
pip install pyowmVerified import paths — ran on the pinned version, not inferred.
Initialize PyOWM with your OpenWeatherMap API key (preferably from an environment variable). Then, use the `weather_manager` to fetch current weather conditions for a city or get a daily forecast using the One Call API 3.0. A free API key supports basic calls and the first 1000 calls/day for One Call by Call API.
Upgrade your Python environment to 3.9 or newer. The library currently supports Python 3.9+.
Ensure your OpenWeatherMap API key is compatible with One Call API 3.0. Update your code to use `one_call()` methods, especially for forecasts and historical data, as legacy `forecast_at_place()` may no longer work with newer free API keys.
Refer to the PyOWM v3 migration guide in the official documentation. You will likely need to rewrite parts of your code, especially related to OWM object instantiation and manager calls (e.g., `OWM25` -> `OWM`, `get_weather_manager()` -> `weather_manager()`).
Always use the `one_call()` method for comprehensive weather data (current, forecast, history) as it is the officially supported and future-proof approach for most use cases with current API keys. Check the OpenWeatherMap API documentation for endpoint compatibility with your subscription type.
Update your code to use the PyOWM v3 API. Replace `from pyowm.owm25 import OWM25` with `from pyowm import OWM` and adapt object instantiation and method calls (e.g., `owm = OWM(API_KEY)` and `mgr = owm.weather_manager()`).
Double-check your API key for typos. If using a new free key, ensure you are calling the `one_call()` methods. Verify your OpenWeatherMap account for API key status and subscription details. Allow some time (up to a few hours) for new API keys to become active.
Install the `geojson` package: `pip install geojson`. If you previously installed PyOWM, run `pip install --upgrade pyowm` to ensure all dependencies are correctly pulled in.
Add error handling to check for the existence of keys before accessing them. For temperature, sometimes min/max/day/night temps might be available instead of a generic 'temp' depending on the API call (e.g., forecast vs current weather). Check the `weather.temperature()` output structure. For example, `print(weather.temperature('celsius'))` to see available keys.