Any fan favorites for both current and historical weather data?

I found a decent free tier API that gives some hourly forecast data (openWeatherMap.com). It's pretty decent, but I started looking at their pricing for paid plans, and like, holy FUCK the "developer" plan is $180 per month! for a weather api? with limited endpoints? Why would anyone pay that much?

What's your favorite free weather API?

EDIT: I ended up going with weatherapi.com. Their endpoints are much more detailed than other options and offer 3 days of hour-by-hour forecast data on free tier, which is best in class.

Here is the API in question:

https://openweathermap.org/current

From the API docs:

You can call by city name or city name and country code. API responds with a list of results that match a searching word.

There is a possibility to receive a central district of the city/town with its own parameters (geographic coordinates/id/name) in API response. Example API call:

api.openweathermap.org/data/2.5/weather?q={city name}

api.openweathermap.org/data/2.5/weather?q={city name},{country code}

But when I try to put that into the address bar: http://api.openweathermap.org/data/2.5/weather?q=London,uk

I get this

cod 401 message "Invalid API key. Please see http://openweathermap.org/faq#error401 for more info."

The only way to get the data is with this URL http://samples.openweathermap.org/data/2.5/weather?q=London,uk&appid=b1b15e88fa797225412429c1c50c122a1

But its not what appears in the example

Any idea what I got wrong in the syntax?