Weather WorldLake Mendota, WI Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Lake Mendota Weather Forecast
| TODAY | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT |
 |  | |  |  |  |  | | | | | |
| Partly Sunny | Patchy Fog | Patchy Fog | Partly Cloudy | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C | Lo: 70°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C |
| POP: 30% | POP: 70% | POP: 40% | POP: 60% | POP: 30% | POP: 50% | POP: 30% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 731 AM CDT Thu Aug 27 2026 
Lake Mendota Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Lake Mendota Weather Map
Lake Mendota Quick Facts
Lake Mendota Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 542 AM CDT Thu Aug 27 2026
Key Messages
- Areas of fog in the WI River Valley and other low lying areas of south central WI for early this AM and early Fri AM.
- Trending active this weekend into early next week, with multiple periods of showers and storms forecast.
- Small Craft Advisory-criteria conditions return to the nearshore waters Saturday afternoon through Sunday. A Beach Hazard Statement may also be needed this weekend.
Aviation
... Issued 542 AM CDT Thu Aug 27 2026
Expect diurnal cumulus clouds with bases around 5000 ft ...