Comment by firasd
3 days ago
Very interesting. The past few days' trend is so common in small talk and general weather discourse ("it was warmer last week") but underrated in weather apps. It's helpful that Open-Meteo provides that data
This output is incidentally perfectly context engineered for LLMs too; I pasted the Delhi page contents into Arena .ai and asked "what's the gist" and qwen3.6-plus said (among other things) " A hot, humid day with a slight chance of afternoon showers." and gemini-3.1-pro-preview said "Mostly clear, but hot and very humid. While the actual high is 34°C, it will feel like 42°C in the afternoon."
Yes, I'm very annoyed that I cannot look at historical data (even from the past couple of days) in weather websites!
Open Meteo lets you query historical weather data from as old as 1940[1].
They have the only weather API I know of that can get both forecast and historical weather with just a single call[2]
I use Open Meteo for most of the data for https://weather-sense.leftium.com
(If you configure a single constant[3], you can get the max 90 days of historical data with the forecast!)
[1]: https://open-meteo.com/en/docs/historical-weather-api
[2]: https://open-meteo.com/en/docs
[3]: https://github.com/Leftium/weather-sense/blob/fefecb05974065...