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Hillside Reservoir Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  | | | | | | | |  | |
| Mostly Cloudy | Mostly Sunny | Mostly Clear | Sunny | Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Clear | Partly Cloudy | Mostly Clear |
| Lo: 47°FLo: 8°C | Hi: 71°FHi: 22°C | Lo: 42°FLo: 6°C | Hi: 73°FHi: 23°C | Lo: 43°FLo: 6°C | Hi: 74°FHi: 23°C | Lo: 43°FLo: 6°C | Hi: 74°FHi: 23°C | Hi: 78°FHi: 26°C Lo: 47°FLo: 8°C | Hi: 78°FHi: 26°C Lo: 47°FLo: 8°C | Lo: 48°FLo: 9°C | Hi: 76°FHi: 24°C Lo: 46°FLo: 8°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1232 PM MDT Sun Sep 27 2026 
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Issued: 600 PM MDT Sun Sep 27 2026
Key Messages
- Nighttime Showers East of I-15: An approaching upper-level trough will increase clouds tonight, bringing a brief round of showers and isolated thunderstorms primarily along and east of the I-15 corridor, focusing over the Eastern Highlands.
- Noticeably Cooler Monday: Showers exit rapidly Monday with clearing skies. Post-frontal air will drop valley daytime highs into the 60sroughly 10 degrees cooler than today`s readings.
- Early October Warming Trend: High pressure builds over the Inte...