What phenomenon indicates that it will rain?

There are several common phenomena that can indicate the arrival of rainy weather:

1.？ Cloud changes: If the clouds in the sky look thicker and darker, it often indicates that a rainstorm or thunderstorm is coming.

2.？ Change of wind direction: If the wind direction changes from cold wind to warm wind and starts to blow from the south or the west, it usually means that a rainstorm or thunderstorm is coming.

3.？ Clouds increase after a sunny day: if it was sunny before, but suddenly there are many clouds in the sky, it usually means rain.

4.？ Temperature rise: If the temperature continues to rise within a few hours, it means that a rainstorm or thunderstorm is coming.

5.？ Humidity increase: If you feel the air humidity increase, it may also be a sign of rain. It should be noted that these phenomena are not absolute, and sometimes even if these phenomena occur, it may not rain, which needs to be judged by combining weather forecast with actual measurement.

6. Mosquitoes, spiders and other insects appear: in rainy weather, insects feel uncomfortable because of environmental changes, so they will appear. If you find a lot of mosquitoes and spiders hanging on your room or door, it is probably a precursor to rain.

7. Changes in birdsong: If you pay attention to the observation, birdsong will change when it is about to rain, and they may become more nervous, busy or uneasy. This is because they know the change of the weather. If there is any change, they'd better know in advance.