Fullerton, LA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Fullerton Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
| Sunny | Clear | Sunny | Clear | Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Sunny | Partly Cloudy | Sunny | Clearing |
| Hi: 95°FHi: 35°C | Lo: 70°FLo: 21°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C | Lo: 71°FLo: 22°C | Hi: 99°FHi: 37°C Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C Lo: 75°FLo: 24°C | Hi: 99°FHi: 37°C | Lo: 75°FLo: 24°C | Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 306 AM CDT Fri Sep 18 2026 

Fullerton Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Fullerton Weather Map
Fullerton Quick Facts
Fullerton Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 605 AM CDT Fri Sep 18 2026
Key Messages
- Drier air will remain across the region through Saturday, which will keep heat indices below advisory criteria. High temps will still range 5 to 10 degrees above climatological norms for the end of summer.
- Precipitation chances slightly increase Sunday into early next week, as an area of low pressure moves across the northeastern Gulf.
Discussion
... (Tonight through next Thursday) Issued at 1146 PM CDT Thu Sep 17 2026
An upper ridge is centered over the Ozarks, where it will meander fo...
Weather World