Marin’s Midweek Meltdown: From Coastal Chill to Inland Heat, Here’s What to Expect
This week, Marin County’s weather is about to take us on a bit of a ride. A lingering system along the West Coast has kept things cooler than usual, but that’s changing fast.
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We’re looking at a big warming trend on the horizon. Summer-like temperatures are on the way for our cities and towns—from Novato to Sausalito, and everywhere in between.
The Cool Down Before the Warm Up
Much of the weekend and Monday felt the effects of a stubborn low-pressure area. This system kept Marin and the greater Bay Area below our typical seasonal temps.
Sunday’s Pacific Embrace
Sunday morning, skies were mostly clear across Marin. Of course, that classic coastal fog hung around in some spots, especially down the Peninsula.
Inland places like Novato and San Rafael hit highs in the 70s and low 80s. It was a nice change from the usual mild Bay Area vibe.
Closer to the bay and the Pacific—think Tiburon or Muir Beach—folks saw cooler conditions. Temperatures there ranged from the upper 50s to the mid-70s.
By Sunday afternoon and evening, those familiar breezy onshore winds kicked in. Greenbrae and Larkspur got gusts between 20–30 mph, and some coastal gaps saw even stronger winds. Marin really does have its windy quirks.
Monday’s Gentle Echo
Monday kept the cool pattern going, thanks to another wave of low pressure. Inland temps mostly stuck in the 70s, and the breeze made it feel pretty comfortable.
Late Monday into early Tuesday, a bit more moisture crept in. There’s a slight chance of coastal drizzle or a light sprinkle, mostly near the immediate coastline and the hills around Point Reyes Station. If it happens, it’ll be brief—don’t blink or you might miss it.
The Marin Heatwave Arrives
Midweek, things really start to flip. Get ready for a real taste of summer as a warming trend rolls in across Marin.
Midweek Transformation
By Wednesday, temperatures will climb fast. Inland spots could easily hit the 80s, maybe even the 90s.
Places like Petaluma and the higher inland elevations will definitely notice the heat. It’s going to feel like summer’s knocking on the door.
Even our coastal communities—Mill Valley, Sausalito, you name it—will warm up. Temperatures along the coast should reach the 60s and 70s later in the week. Honestly, it’s perfect for getting outside, especially if you want to avoid that inland sizzle.
North Bay Breezes Reimagined
As we move from Wednesday into Thursday, the weather looks set to change. Gusty north winds could sweep across the interior parts of the North Bay.
Folks in places like Ignacio and maybe even the Sonoma County borderlands might notice these stronger, cooler breezes. High-pressure systems often bring that kind of shift.
This time of year always reminds me of Marin’s wild microclimates. One minute you’re shivering in a cool, misty Bolinas morning, and the next, you’re in sunny, much warmer San Rafael.
It’s kind of amazing how much the weather can change within just a few miles. If you want to really appreciate Marin County weather, you’ve got to pay attention to those local shifts.
Earlier in the week, we had that gentle, Pacific-cooled air. Now, places from Mill Valley to Marinwood should get ready for warmer days.
Honestly, it’s a good idea to stay hydrated and maybe save your tougher outdoor plans for early or late in the day. The heat tends to sneak up on you.
Anyway, we’ll keep watching the skies and let you know if anything else pops up. Marin weather never really sits still, does it?
Here is the source article for this story: Cooler start to week before warming trend
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