Anonymous wrote:California in June can actually be surprisingly chilly. Be prepared for warm afternoons, but June mornings are often socked in with "June gloom." Cool, low misty clouds that usually burn off by mid-day. Nights are also cooler so bring a couple sweaters. You may want to consider a small cross-body bag. Much better than a fanny pack and still keeps your hands free. Merrell, Clarks and Born make comfortable and not too frumpy sandals.
This. I grew up in So CA and have probably been to Disneyland at least 50 times in June. Be sure to check the weather forecast before you go - just as we've had a cool spring, they've had a warm one, but the June weather is usually as the PP described. Some days, even, the clouds never burn off and it's in the low 60's all day. There are lockers near the entrance on Main Street where you can stash extra clothes if you need to take them off. If you get new shoes before you go make sure they're broken in because you're going to do A LOT of walking and standing.