Weather Alert
Thornton Weather Warning NWS WEATHER ALERT FOR THE THORNTON, CA AREA - Issued: 1030 AM PDT Mon Sep 7 2026 Thornton Weather Warning

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Thornton, CA Weather Forecast

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Thornton, CA Weather Forecast

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Thornton CA weather - Clear - 58°F
Clear
58°F
Updated 4:03 am
Feels Like 55°F
Humidity 80%
Wind N 0 mph
Barometer  29.93 in
Dew Point 52°F
Thornton CA weather - Clear - 14°C
Clear
14°C
Updated 4:03 am
Feels Like 13°C
Humidity 80%
Wind N 0 km/h
Barometer  101.4 kPa
Dew Point 11°C
WX Settings

Thornton Weather Forecast

TODAY TONIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SUNDAY MONDAY
Thornton, CA Weather - Today Sunny Thornton, CA Weather - Tonight Mostly Cloudy Thornton, CA Weather - Wednesday Clearing Thornton, CA Weather - Wednesday Night Mostly Clear Thornton, CA Weather - Thursday Mostly Sunny Thornton, CA Weather - Thursday Night Clear Thornton, CA Weather - Friday Sunny Thornton, CA Weather - Friday Night Clear Thornton, CA Weather - Saturday Clear Thornton, CA Weather - Sunday Clear Thornton, CA Weather - Monday Clear
Sunny Mostly Cloudy Clearing Mostly Clear Mostly Sunny Clear Sunny Clear Clear Clear Clear
Hi: 93°FHi: 34°C
 Lo: 66°FLo: 19°C Hi: 97°FHi: 36°C
 Lo: 71°FLo: 22°C Hi: 98°FHi: 37°C
 Lo: 66°FLo: 19°C Hi: 91°FHi: 33°C
 Hi: 88°FHi: 31°C
Lo: 59°FLo: 15°C		 Hi: 88°FHi: 31°C
Lo: 59°FLo: 15°C		 Hi: 88°FHi: 31°C
Lo: 59°FLo: 15°C		 Hi: 88°FHi: 31°C
Lo: 59°FLo: 15°C
POP = Probability of Precipitation.
Weather Outlook Updated: 201 AM PDT Tue Sep 08 2026 Thornton, CA Weather - WeatherWorld.com

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Issued: 1219 PM PDT Mon Sep 7 2026

Key Messages

  • Drying and warming trend through Thursday, with areas of Moderate to Major HeatRisk Wednesday and Thursday.
  • Heat Advisory is in effect 10 am Wednesday - 10 pm Thursday for the Delta, Valley, and foothills.
  • Cooling temperatures and breezy onshore winds Friday into the weekend.

Discussion

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Today-Thursday: While troughing aloft over the PacNW remains the primary driving feature of the weather pattern today, ridging aloft is beginning to build westward from the Desert Southwest. As the b...