Weather WorldState Line Reservoir, AZ Weather Forecast
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State Line Reservoir Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | WEDNESDAY | THURSDAY |
 |  |  |  | | |  | | | |
| Chance of T-Storm | Mostly Clear | Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Partly Cloudy | Mostly Clear | Mostly Clear | Mostly Clear |
| Hi: 95°FHi: 35°C | Lo: 70°FLo: 21°C | Hi: 96°FHi: 36°C | Lo: 71°FLo: 22°C | Hi: 96°FHi: 36°C | Hi: 95°FHi: 35°C Lo: 70°FLo: 21°C | Hi: 95°FHi: 35°C Lo: 70°FLo: 21°C | Hi: 96°FHi: 36°C Lo: 70°FLo: 21°C | Hi: 96°FHi: 36°C Lo: 70°FLo: 21°C | Hi: 96°FHi: 36°C Lo: 70°FLo: 21°C |
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 411 AM MST Fri Aug 21 2026 
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State Line Reservoir Forecast Discussion
Issued: 1051 PM PDT Thu Aug 20 2026
Key Messages
- Warm temperatures continue with above-normal afternoon highs and near-record morning lows into next week.
- Thunderstorm chances continue today but decrease over the weekend and remain lower through the first half of next week.
Discussion
...Through next Thursday.
Above-normal temperatures will continue today as a 500mb ridge remains in place across the region. An increase in moisture over southern Mohave County and the lower Colorado River Valley will allow readings to cool a few degrees...