Here in the San Francisco Bay Area we often have our best weather in the fall – September and October in particular. That’s after the summer fog is mostly gone and temperatures warm up – especially if there’s a high pressure area inland that causes warm offshore winds that push higher temperatures into the Bay.
The downside is those winds and higher temperatures are also what bring with them the greatly elevated risks of wildfires – with most of the worst files in California occuring in these fall months.
This year it feels like we may escape some of those wildfire risks following the first real rainfall of the season which arrived on Tuesday with an offshore low pressure system gradually moving down the coast from Oregon to Southern California. As it moved, it picked up moisture from the Pacific Ocean and dumped it onshore – in particular, Southern California seemed to get the worst of it. With the rain came much colder temperatures – the first time I’ve needed to wear my heavier coat with a hood this fall.
With that weather system now moving across the rest of the U.S., we’re looking at a week or ten days of nicer fall weather with daytime temperatures mostly in the 70’s and overnight lows in the low 50’s – just about ideal for this time or year.
Let’s hope this week’s rain put an end to the risk of wildfires this year – but it may be too early to count on the just yet.