Wunderground questions

I’d appreciate knowing if, using the Wunderground API, I can determine if it is actually raining, as detected by a Davis weather station and how instantaneous this is likely to be?

TIA

It polls, so best case 1 second worse case is the default scan interval. Which is 30 seconds I think. Might also be 120 seconds. Either way, not instant.

You’d be better off getting a device outside your house.

Great. Thank you for your help.