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Summit Lake, IA Weather Forecast
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Summit Lake Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  |  |  |  |  | | | | | |
| Mostly Clear | Sunny | Partly Cloudy | Partly Sunny | Chance of T-Storm | Chance of T-Storm | Mostly Cloudy | Partly Sunny | Chance of T-Storm | Chance of T-Storm | Mostly Clear | Mostly Sunny |
| Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 80°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C |
| POP: 50% | POP: 50% | POP: 30% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 253 PM CDT Fri Aug 21 2026 
Summit Lake Radar Loop
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Summit Lake Weather Map
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Summit Lake Forecast Discussion
Issued: 231 PM CDT Fri Aug 21 2026
Key Messages
- Marginal (Level 1 of 5) Risk for severe weather across southern Iowa. Damaging winds and large hail are the primary threats.
- Fairly consistent highs through midweek next week, ranging from the 70s to low 80s across Iowa.
- Dry through the weekend, precipitation chances return Sunday night into Monday and at times next week.
Aviation
/18Z TAFS THROUGH 18Z SATURDAY/... Issued at 1209 PM CDT Fri Aug 21 2026
Mostly VFR conditions are expected at all terminals this TAF period. MVFR cumulus clo...