Do you have any reference for an IPCC claim that global warming will cause deeper cooling??? I've not seen it, though I've read all the IPCC summaries. Reference, please.
Regardless you are getting hung up on 'colder', the key is more extreme weather. To that point the IPCC does mention more extreme storms, if you want a reference googling that yourself will bring up plenty.
I'll assume you live in sunny California and extreme weather to you means rainstorms not crazy ass cold polar vortex dumps of snow and ice.