Why do most online weather forecasts only state the chance of rain as a percantage, without stating the expected rainfall in millimetres? If there’s a 90% chance of rain, it matters a lot whether it will be 0.5 or 5mm

Question

Why do most online weather forecasts only state the chance of rain as a percantage, without stating the expected rainfall in millimetres? If there’s a 90% chance of rain, it matters a lot whether it will be 0.5 or 5mm

In: 29

Answer 1

I agree OP.

If it’s gonna rain for 5mins and be .5mm total – I’ll continue with my plans.

If it’s going to rain for 30mins (or 5 mins, but 6 different times), and be 5mm, I’ll change plans.

I guess it’s just a limitation of the science. Only say what you’re confident is true.