What does the percentage on the weather forecast map mean?

It has two meanings:

1. If it is rainy or snowy weather, the percentage number next to the raindrop or snowflake icon represents the probability of rainfall or snowfall.

2. If the weather is sunny or cloudy, there will be no such percentage.

Probabilistic weather forecasts, such as precipitation forecasts, traditional weather forecasts generally predict rain or no rain, while probabilistic forecasts give a percentage of possible precipitation. The greater the percentage, the more likely it is that precipitation will occur. The bigger.

Probabilistic weather forecast reflects not only the deterministic aspect of weather changes, but also the uncertainty and degree of uncertainty of weather changes. In many cases, this form of forecast is more suitable for decision-making needs in economic and military activities.

Rainfall probability

1. Precipitation probability forecast is generally sunny, with a probability of 0% indicating that precipitation is unlikely; from sunny to cloudy, the probability of precipitation is between 10% and 20%. The possibility of precipitation is very small;

2. Cloudy, sporadic precipitation or local precipitation, the probability of precipitation is between 30% and 50%;

3. Precipitation probability The possibility of precipitation is relatively high between 60% and 70%;

Extended information

After sorting, analyzing, judging and discussing various meteorological data, forecasters predict It shows the percentage of precipitation chance in a certain area and within a certain period of time. This is just the "chance" of predicting precipitation, but it is not guaranteed to be 100%.

The chance of precipitation of 0.1 cm or more in each forecast area in three periods in the next 36 hours (one period every 12 hours) has nothing to do with the precipitation time and area.

When arranging activities, it should be mainly rainy and make appropriate preparations for rain; the forecast probability of precipitation is 60%; when arranging activities, it should be mainly rainy and non-rainy; the forecast probability of precipitation is 80%, you should be prepared for rain.