Honestly, if you’re looking at the forecast for Sunday, January 18, 2026, and thinking it looks like a typical winter day in Southern California, you’ve basically been lulled into a false sense of security by our Mediterranean climate.
It’s going to be 80°F.
In January.
While the rest of the country is likely scraping ice off windshields or mourning the death of their car batteries, Los Angeles is decided to throw a mini-summer party. But here’s the thing: it’s not just "nice out." It’s technically unseasonably warm. We’re talking about a high of 80°F and a low of 53°F. That’s a 27-degree swing that’ll have you peeling off layers faster than a tourist at the Santa Monica Pier.
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The Specifics: What's the weather in la tomorrow?
Let’s get into the nitty-gritty of the data provided by Google Weather. Sunday is going to be mostly sunny during the day and clear at night.
If you’re planning on being outside—maybe hitting up Smorgasburg at The Row DTLA or catching the final day of the Asian American Expo in Pomona—here is exactly what you are walking into:
- High Temperature: 80°F
- Low Temperature: 53°F
- Humidity: A bone-dry 33%
- UV Index: 2 (Low, but don't let the "low" number fool you; the sun hits different when it's 80 degrees)
- Wind: 6 mph coming from the North
- Rain Chance: 10% during the day, dropping to 0% at night
That 10% chance of rain? It’s basically a weather forecaster’s way of saying "I don't want to be wrong if a single cloud sneezes." Realistically, you’re looking at blue skies.
Why 80 Degrees Matters Right Now
We just came off a massive atmospheric river event earlier this month. Remember the flooding alerts from UCLA and the City of LA back on New Year’s? We were seeing 1-3 inches of rain across the basin. Now, the soil is drying out, and the LAFD is already on high alert for brush fires.
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The low humidity (33%) is the real story here. When the humidity drops and the temperature climbs into the 80s, the "wet grass smell" Alec Derpetrossian and the LAFD crews were talking about earlier this week turns into "tinder-dry fuel."
It’s that weird LA paradox. One week we’re worrying about debris flows in burn scars, and the next week we’re checking the North wind speeds to see if a red flag warning is coming. At 6 mph, the wind isn't a major threat tomorrow, but it’s enough to keep the air moving and the heat feeling "crisp" rather than "muggy."
Staying Comfortable in the "Winter" Heat
Since it’s going to be clear and 80°F, you need to rethink your outfit. The 53°F low means it will be chilly until about 10:00 AM.
- Morning (8 AM - 10 AM): You’ll want a light jacket. 53°F in the shade feels a lot colder than it sounds.
- Afternoon (12 PM - 4 PM): This is peak 80°F territory. T-shirts and shorts are the move. If you’re at the Ice at Santa Monica (which is open until tomorrow!), you’re going to be skating in a t-shirt. It’s a very "California" vibe.
- Evening (6 PM onwards): Once the sun dips, that 53°F returns quickly. The clear skies mean there’s no "blanket" of clouds to hold the heat in.
The Local Impact
If you’re headed to the Walt Disney Concert Hall for Salonen & Levit or the Echoplex to see Nat & Alex Wolff, keep in mind that indoor venues in LA are notoriously aggressive with their AC. You’ll be sweating outside and shivering inside.
Also, the UV index of 2 is technically "low," but with mostly sunny skies, you’ll still get significant exposure if you’re hiking Griffith Park or hanging out at the beach. In 2026, we’ve seen these mid-January heat spikes become more frequent, often following the heavy rain cycles we saw in late 2025.
What to Actually Do Tomorrow
- Hydrate: 33% humidity is dry. You won't feel yourself sweating as much because it evaporates instantly, but you're losing water.
- Check Your Tires: Drastic temperature swings from 53°F to 80°F can mess with your tire pressure. If that little light comes on, now you know why.
- Beach Day? Honestly, yes. With the high at 80°F, it's one of those rare January days where the sand won't feel like ice.
The takeaway for what's the weather in la tomorrow is simple: it's a "fleece-to-flip-flops" kind of day. Enjoy the 80-degree sun while it lasts, because as any local knows, the next Pacific storm is usually just around the corner.
For those heading out, make sure to pack a hoodie for the evening drop-off, especially if you’re staying out for the 7:30 PM Marc Maron set at The Elysian Theater or checking out Wyclef Jean at Blue Note LA. The transition from a sun-drenched afternoon to a crisp, clear 53°F night happens fast.
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Actionable Next Steps:
- Plan your outdoor activities for between 11:00 AM and 4:00 PM to catch the peak warmth.
- If you're hiking, stick to the early morning (7:00 AM) to avoid the 80°F heat while the trails are still damp from recent rains.
- Set a reminder to bring a jacket if you’re staying out past sunset at 5:00 PM.