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Waterloo School Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | WEDNESDAY | THURSDAY | FRIDAY |
 |  |  | | |  | | | | |
| Mostly Clear | Sunny | Partly Cloudy | Sunny | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C | Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C | Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C Lo: 46°FLo: 8°C | Hi: 70°FHi: 21°C Lo: 46°FLo: 8°C | Hi: 70°FHi: 21°C Lo: 46°FLo: 8°C | Hi: 70°FHi: 21°C Lo: 46°FLo: 8°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 209 PM PDT Fri Sep 18 2026 
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Issued: 434 PM PDT Fri Sep 18 2026
Key Messages
- Warm temperatures through Tuesday with afternoon highs in the mid 70s to low 80s.
Discussion
... Friday night through Monday: An upper-level ridge shifts into the Pacific Northwest as an upper-level low travels eastward across southern Idaho into Montana and Wyoming. This will promote mostly clear skies, light winds, and above normal temperatures. Temperatures will trend warmer and drier through the weekend with widespread highs in the upper 70s to low 80s Sunday and Monday. The upper-...