Honestly, if you're looking at the west covina weather 10 day outlook right now, you might be a little confused. One day it feels like a literal summer afternoon, and the next you’re digging for that heavy hoodie you swore you wouldn't need in Southern California.
Right now, as of January 18, 2026, the current temperature is sitting at 57°F. It’s nighttime, and the sky is mostly cloudy. There’s a tiny 10% chance of rain, but mostly it’s just that crisp, slightly humid air the San Gabriel Valley gets this time of year.
The Immediate Outlook: Sun vs. Clouds
Today, Sunday, January 18, we’re actually looking at a gorgeous day. The high is hitting 79°F. That is significantly warmer than the historical January average of around 68°F. You’ll see plenty of sun, though tonight drops back down to 49°F.
Tomorrow, Monday, January 19, stays clear. The high will be 76°F with a low of 48°F. Basically, if you have outdoor plans for the holiday or just need to get some yard work done, Monday is your gold mine.
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Looking Deeper Into the Week
By Tuesday, things start to shift a little. We're keeping the warmth—highs around 77°F—but the clouds are going to start rolling in by evening.
Wednesday and Thursday are where the "real" January starts to peek through. We’re talking more clouds and temperatures dropping into the low 70s. By Thursday, January 22, the high is only 72°F.
Is it going to rain? Probably not much. The chance of precipitation peaks around 15% later in the week. It’s more of a "maybe keep an umbrella in the trunk just in case" situation rather than a "cancel the party" situation.
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West Covina Weather 10 Day Breakdown
If you're trying to plan your life for the next week and a half, here is how the numbers are actually shaking out:
- Sunday (Today): Sunny, high 79°F, low 49°F.
- Monday: Sunny and clear, high 76°F, low 48°F.
- Tuesday: Partly sunny, high 77°F, low 50°F.
- Wednesday: Mostly cloudy, high 75°F, low 49°F.
- Thursday: Partly sunny with more clouds, high 72°F, low 49°F.
- Friday: Slightly cooler, high 70°F, low 48°F.
- Saturday (Jan 24): Partly sunny, high 69°F, low 48°F.
- Sunday (Jan 25): High 72°F, low 48°F.
- Monday (Jan 26): Partly sunny, high 74°F, low 48°F.
- Tuesday (Jan 27): High 76°F, low 49°F.
Why the Forecast Feels Different
You've probably noticed that West Covina feels different than, say, Santa Monica or even downtown LA. It’s the "valley effect." Since we’re nestled in the San Gabriel Valley, we don't get that immediate ocean breeze to cool us down during the day, which is why we’re seeing highs in the 70s while the coast might be shivering in the low 60s.
But once the sun goes down? The heat vanishes. That 30-degree swing between day and night is a classic inland trait.
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What You Actually Need to Do
Don't be fooled by the 79-degree highs. You still need a jacket for the mornings. The humidity is hovering around 30-40% right now, which is pretty comfortable, but as it climbs toward 60% by Friday, it might feel a bit more damp.
If you're a gardener, the soil moisture is currently around 23%. With the lack of significant rain in the forecast, you’ll probably need to keep your watering schedule active despite the "winter" label on the calendar.
Actionable Insights for the Week:
- Dress in layers: 79°F at 2 PM feels like 49°F at 7 AM.
- UV Protection: The UV index is hitting 3 this week. It’s low, but if you’re out at Plaza West Covina or hiking South Hills for hours, you’ll still want some sunblock.
- Wind Watch: Winds are light, mostly under 6 mph, so no need to worry about Santa Ana gusts knocking over your patio furniture this week.
Stay hydrated and enjoy the weirdly warm January sun while it lasts.