Weather World
Rochester, IL Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Rochester Weather Forecast
| REST OF TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  |  |  | |  | |  | | | |  |
| Mostly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Partly Cloudy |
| Lo: 70°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 61°FLo: 16°C | Hi: 71°FHi: 22°C | Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C Lo: 51°FLo: 11°C | Hi: 75°FHi: 24°C Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C Lo: 51°FLo: 11°C |
| POP: 50% | POP: 60% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 232 AM CDT Sun Sep 20 2026 
Rochester Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Rochester Weather Map
Rochester Quick Facts
Rochester Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 322 AM CDT Sun Sep 20 2026
Key Messages
- A Marginal Risk (level 1 of 5) of severe weather exists south of the I-72 corridor today. The primary risk will be isolated strong wind gusts during the afternoon and early evening.
- Much cooler weather will be on tap this week as high temperatures drop into the 60s everywhere north of I-70 Monday through Wednesday.
Discussion
... Issued at 322 AM CDT Sun Sep 20 2026
A 25-30kt 850mb jet streak oriented from the Texas panhandle northeastward to Iowa continues to provide the necessary fuel...