Hi, Arnold! Welcome to planDisney! It is my pleasure to help you today.
With all the rain we've been experiencing in California recently, this is an excellent question! You will be pleased to learn that umbrellas are allowed inside both Theme Parks. For your reference, I believe it is also crucial to know
what items are prohibited.
Arnold, I commend you for visiting the
Disneyland Resort on a rainy day. I recommend dressing in layers and checking your
Disneyland Mobile App for any
changes to attractions or event schedules due to the weather.
Some of my favorite things to do on rainy park days are arriving early to rope-drop and getting on as many indoor attractions--
excluding some outdoor ones--as possible because you might experience shorter wait times. You will find that the parks are much calmer on rainy days.
No matter the weather, you are bound to have a fantastic day because you are in the Happiest Place on Earth.
Please come back and visit in the future with any more questions you have.
Your Pal,
Alejandra