Rochester, IL Weather Forecast
Sangamon County, Illinois
Live radar, warnings and storm tracking for Rochester, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for Rochester
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Rochester, IL at a glance
Rochester is home to about 3,899 people in Sangamon County, across 2.6 square miles. It ranks 374th by population of 441 places in Illinois with a forecast here. The nearest neighbour with its own forecast is Springfield, 5 miles away.
- County
- Sangamon County
- Population
- 3,899 2023 est.
- Land area
- 2.6 sq mi
- People per sq mi
- 1,474
- Forecast point
- 39.7458°N, 89.5665°W
How well can the network see Rochester?
The nearest Doppler radar is KILX (Lincoln, IL), to the NNE. Its lowest scan passes about 1,900 ft above Rochester. That is about as close as US radar coverage gets: low-level rotation and gust fronts over Rochester show up clearly. Rochester is closer to its radar than 70% of US cities.
The closest weather station is KSPI (Springfield/Lincoln Capital Arpt). Representative on most days, though a thunderstorm can hit one and miss the other.
Forecasts near Rochester
- Springfield, IL5 mi
- Riverton, IL7 mi
- Chatham, IL8 mi
- Sherman, IL10 mi
- Pawnee, IL11 mi
- Auburn, IL15 mi
- Taylorville, IL19 mi
- Virden, IL20 mi
Elsewhere in Illinois
ChicagoAuroraJolietNapervilleRockfordElginAll Illinois forecasts →