Sounds like a stupidly easy question to find out with a quick internet search, but it’s not.
I don’t want to know the average surface temperature, or the average ocean surface water temperature, or read another article about climate change.
But that’s all I found in the past hour.
I’d like to know the average temperature of all molecules that comprise earth, or a best guess scientific estimate.
It’s not a stupidly easy question. It is extremely hard. Calculating the average temperature of all molecules on Earth is extremely hard due to the vast range of temperatures across different environments, from the Earth’s core to the atmosphere. Calculation isn’t the problem but collecting data is. You need to collect all the data that distributed widely on earth. Factors like altitude, latitude, and specific conditions in different regions making collecting an accurate data even harder.