Troy, IL Weather Forecast
Madison County, Illinois
Live radar, warnings and storm tracking for Troy, 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 Troy
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Troy, IL at a glance
Troy is home to about 11,209 people in Madison County, across 5.7 square miles. It ranks 202nd by population of 441 places in Illinois with a forecast here. The nearest neighbour with its own forecast is Maryville, 5 miles away.
- County
- Madison County
- Population
- 11,209 2023 est.
- Land area
- 5.7 sq mi
- People per sq mi
- 1,969
- Forecast point
- 38.7397°N, 89.8825°W
How well can the network see Troy?
The nearest Doppler radar is KLSX (St. Louis, MO), to the W. Its lowest scan passes about 2,900 ft above Troy. Close enough to see rotation in the low part of a storm, where tornadoes form. Troy is closer to its radar than 51% of US cities.
The closest weather station is KALN (Alton/St Louis Rgnl). Representative on most days, though a thunderstorm can hit one and miss the other.
Forecasts near Troy
- Maryville, IL5 mi
- Glen Carbon, IL6 mi
- Edwardsville, IL7 mi
- Collinsville, IL8 mi
- O'Fallon, IL10 mi
- Pontoon Beach, IL10 mi
- Lebanon, IL10 mi
- Highland, IL11 mi
Elsewhere in Illinois
ChicagoAuroraJolietNapervilleRockfordElginAll Illinois forecasts →