##### Asked by: Romaissae Todtenhofft

asked in category: General Last Updated: 15th June, 2020# What does 20 chance of rain actually mean?

**The**reality: "When a forecast says there

**is a**20 percent chance of rain tomorrow

**it**actually

**means**it will rain on 20 percent of the days with exactly

**the same**atmospheric conditions,"

**Joslyn**explained. Put another way, on that day there's an 80 percent chance there

**will**be no rain anywhere in the

**forecast**area.

Click to see full answer.

Accordingly, what does percent chance of rain actually mean?

If the forecaster is only 50% sure that **precipitation** will occur, and expects that, if it **does** occur, it will produce measurable **rain** over about 80 **percent** of the area, the PoP (**chance of rain**) is 40%. ( PoP = . So a 50% **chance of rain means** that half of your day will get **rain**.

Also Know, what does 40 percent rain mean? When your local forecaster says **40**%, they **mean** for an area, usually for the local forecast or viewing area and for a certain time. Basically what they are saying is that in a forecast that suggests a **40**% chance of **rain**, **40**% of the forecast area will receive **rainfall** during the specific forecast period.

Hereof, what does 10% chance of rain mean?

If there's a **10** percent **chance of rain**, it **means** the current conditions yield **rainfall** one out of every **10** times observed. If it's 20 percent, then you'd see **rain** two out of every **10** times, and so on.

Will it rain if there is a 40 percent chance?

A '**40**% **chance** of **rain**' means every point in the forecast area **has** a **40**% **chance** of observing measurable precipitation (at least 0.01") during the 12 hour forecast period. It also means **rain** is expected over **40**% of the forecast area. **there will** be **rain 40**% of the time during the 12 hour forecast period.