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Heritage Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
 |  | |  | | | | | | | | |
| Sunny | Mostly Clear | Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy | Sunny | Partly Cloudy | Sunny | Partly Cloudy | Sunny | Partly Cloudy |
| Hi: 104°FHi: 40°C | Lo: 81°FLo: 27°C | Hi: 103°FHi: 39°C | Lo: 81°FLo: 27°C | Hi: 103°FHi: 39°C | Lo: 80°FLo: 27°C | Hi: 103°FHi: 39°C | Lo: 80°FLo: 27°C | Hi: 102°FHi: 39°C | Lo: 78°FLo: 26°C | Hi: 100°FHi: 38°C | Lo: 78°FLo: 26°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 416 AM PDT Wed Aug 19 2026 
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Heritage Forecast Discussion
Issued: 445 AM PDT Wed Aug 19 2026
Key Messages
- Temperatures peak on midweek with above- normal afternoon highs and near-record morning lows.
- Monsoon moisture increases late this week into the weekend, accompanied by increased shower and thunderstorm chances.
Discussion
...Through Early Next Week.
Another stretch of above normal temperatures continues this week for the Desert Southwest as strong ridging builds in overhead. Currently a 597dm high is centered directly over the Colorado River Valley and Las...