Seeing rain in a dream could be a cherishing or devasting experience and its meaning also depend upon many factors as per Islam. Generally speaking, seeing rain in a dream is a blessing from Allah.
1- According to Prophet Daniyal عليه السلام, seeing people enjoying the rain in a dream is a good sign for all.
2- Seeing that it is raining only in one house or area is a sign of illness and sorrow for the inhabitants of that area.
3- Heavy rain with black clouds could mean that the dreamer would get sick or might die soon.
4- According to Ibn Sirin رحمة الله عليه, the greatest dream interpreter of Islam, seeing yourself abluting with the rainwater is a sign of getting rid of worries and sorrows.
5- Seeing heavy rain without damage in a dream but it has filled the rivers and lakes is interpreted as the strictness of the King from which the dreamer shall be safe.
6- The rainwater with a strong wind in a dream is a sign of the wrath of Allah and that disease shall hit that place.
7- Seeing the rain of honey in a dream is a sign that the country will be blessed with blessings and wealth.
8- Seeing yourself drinking the rainwater has different meanings as per Islam depending upon the purity of water;
- Drinking clean water: wealth and blessings.
- Blackwater with bad taste: Sickness and Sadness.