Weather WorldFourth Chain Lake, UT Weather Forecast
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Fourth Chain Lake Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
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| Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of T-Storm | Chance of Showers | Partly Cloudy | Partly Cloudy |
| Hi: 80°FHi: 27°C | Lo: 51°FLo: 11°C | Hi: 81°FHi: 27°C | Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C | Lo: 50°FLo: 10°C | Hi: 75°FHi: 24°C | Lo: 50°FLo: 10°C | Hi: 75°FHi: 24°C | Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C Lo: 49°FLo: 9°C |
| POP: 50% | POP: 20% | POP: 50% | POP: 30% | POP: 70% | POP: 40% | POP: 40% | POP: 40% | POP: 50% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1243 AM MDT Thu Aug 20 2026 
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Fourth Chain Lake Forecast Discussion
Issued: 1002 PM MDT Wed Aug 19 2026
Key Messages
- Building high pressure will bring a steady warming trend in temperatures through Thursday across the south and through Friday across the north.
- Monsoon moisture will move back into Utah and southwest Wyoming late in the week, persisting through at least early next week. This will bring an increased threat of showers and thunderstorms capable of producing flash flooding.
Discussion
...High pressure centered over AZ this evening will shift east on Thursday b...