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Mountain Lakes - Upper Lake Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY |
 |  | | | | | | |  | |  |  |
| Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Partly Cloudy | Mostly Sunny | Chance of Showers | Chance of Showers |
| Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C |
| POP: 50% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 742 PM EDT Mon Aug 31 2026 
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Issued: 756 PM EDT Mon Aug 31 2026
Key Messages
1. Heat and humidity return this week. Dangerous triple digit heat index values are expected across much of the low terrain each afternoon. 2. Dry conditions Tuesday. Thunderstorm chances steadily return into the weekend.
Discussion
... Key message 1: Heat and humidity return this week. Dangerous triple digit heat index values are expected across much of the low terrain each afternoon.
A broad upper anticyclone centered over the mid MS Valley will slowly move east through the week becom...