I keep this page from the DL website bookmarked: https://disneyland.disney.go.com/faq/parks/weather/
The attractions listed (as of today; subject to change) are:
Disneyland Park
-Alice in Wonderland
-Davy Crockett’s Explorer Canoes
-Gadget’s Go Coaster
-The Mad Tea Party
-Main Street Vehicles
-Pirate’s Lair on Tom Sawyer Island
-Storybook Land Canal Boats
Disney California Adventure Park
-Golden Zephyr
-Goofy’s Sky School
-Jumpin’ Jellyfish
-Luigi’s Rollickin’ Roadsters
-Redwood Creek Challenge Trail
I’ve been to DLR many times in the rain (and probably will be again this weekend!) and this list holds true with my experience.