This is the 8777th most frequent Spanish word.
subió
"Subió" means "he/she/it went up" or "rose."
In this sentence, 'subió' describes an increase in value, specifically the temperature level.
La temperatura subió inesperadamente durante la noche.
The temperature rose unexpectedly during the night.
This usage of 'subió' refers to someone climbing or ascending a platform or elevated place, such as a stage.
El cantante subió al escenario para recibir el premio.
The singer went onto the stage to receive the award.
Here, 'subió' is used to indicate the action of ascending or going up something, in this case, stairs.