I am in norcal and had a similiar experience. When I started the temperature was not warm and not much happened over the first month except picking up some wood flavor.
Once i did get some sun/heat on it things started happening quickly. I think you need some good sun/heat cycles to really see how things are going to go.
What I did, was once the sun came out, I would move the barrel (5 gal) out on the lawn in the morning, then at night bring it inside. I could tell when I came home that the bourbon had started getting into the wood as the bunghole would have whiskey stains on it. Each day i would get those fresh whiskey stains.
I think you are fine right now, try to get it out in some sun/heat while the sun is out during the day. Norcal cools down very nicely at night to bring the whiskey back out.