I can't remember ever taking an umbrella to California, but I'm packing one today. So instead of the sunny and cold weather I've usually experienced in San Francisco, the forecast calls for wet and cold weather every day I'm there, with the sun coming out right after I leave.
Here in Chicago, we've had just 20% of possible sun this month, which WGN points out has completely obscured that we have 15 minutes more daylight than we had at the solstice. On the other hand, so far we've had the 4th-warmest January in history, with significantly above-normal temperatures predicted through the end of the month.
At least I'll see the sun on my flight today...