2018 Freshman admit rates for UC GPA of 4.20 or above capped weighted and not major specific:
UCB: 37%
UCLA: 41%
UCSD: 70%
UCSB: 80%
UCD: 89%
UCI: 75%
UCSC: 92%
UCR: 96%
UCM: 98%
2019 UC capped weighted GPA averages along with 25th-75th percentile range:
UCB: 4.23 (4.15-4.30)
UCLA: 4.25 (4.18-4.32)
UCSD: 4.16 (4.03-4.28)
UCSB: 4.16 (4.04-4.28)
UCI: 4.13 (4.00-4.25)
UCD: 4.13 (4.00-4.26)
UCSC: 3.96 (3.76-4.16)
UCR: 3.90 (3.69-4.11)
UCM: 3.73 (3.45-4.00)
25th - 75th percentiles for ACT composite + language arts
UCB: 28-35
UCLA: 29-35
UCSD: 26-34
UCSB: 26-34
UCD: 24-33
UCI: 24-34
UCSC: 24-32
UCR: 21-30
UCM: 18-26
Overall you are a competitive applicant for all the UC’s. If affordability is an issue, then hopefully you have other financial safeties on your list. Expect to pay full fees at $65K/year but you are competitive for Regents/Chancellor scholarships which could make a small dent in your costs.
Best of luck.