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Troy, IL 62294 Weather
Current conditions
Observed at St. Louis Downtown Airport · 54 min ago
Forecast
10-day-
Tonight
Mostly clear, with a low around 47. Wind around 0 mph.
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Thursday
Sunny, with a high near 77. North wind around 1 mph.
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Thursday Night
Clear, with a low around 48. Northeast wind around 1 mph.
National Weather Service forecast updated 1 hr ago.
Hourly
Hourly forecast- Now59°
- 10 PM56°
- 11 PM55°
- Thu12 AM54°
- 1 AM53°
- 2 AM51°
- 3 AM50°
- 4 AM49°
- 5 AM49°
- 6 AM48°
- 7 AM47°
- 8 AM49°
- 9 AM55°
- 10 AM64°
- 11 AM69°
- 12 PM71°
- 1 PM75°
- 2 PM76°
- 3 PM76°
- 4 PM77°
- 5 PM76°
- 6 PM72°
- 7 PM67°
- 8 PM60°
10-day forecast
Details- TonightOct 21Mostly Clear47°
- ThuOct 22Sunny48°77°
- FriOct 23Sunny46°76°
- SatOct 24Mostly Sunny48°75°
- SunOct 25Partly Sunny48°78°
- MonOct 26Partly Sunny49°77°
- TueOct 27Partly Sunny47°72°
- WedOct 28Mostly Sunny72°
- ThuOct 29Mostly sunny42°68°
- FriOct 30Cloudy54°65°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Troy
More weather news-
Tracking more clouds tonight, mild WednesdayABC17NEWS TONIGHT: Mostly cloudy and cool with lows in the upper 40s to around 50. TOMORROW: Mostly sunny and mild with highs in the lower 70s. EXTENDED: We'll be a touch warmer as a weak disturbance sends clouds our…
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Tracking a cool night, pleasant TuesdayTONIGHT: Mostly clear and cool with lows in the mid-40s. TOMORROW: Mostly sunny and mild with highs in the lower 70s. EXTENDED: We'll be cool again overnight as temperatures fall to the mid-40s. We'll see gradual…
- St. Louis Weather Forecast Friday Through Thursday
St. Louis is trading late-summer warmth for a blustery fall reset Friday: mostly cloudy skies, a high near 55, and northwest winds around 17 mph with gusts up to 33 mph. A few rain showers could move through after 3…
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First Alert Weather Day Today: Low Severe Storm Chance 2 - 7PMKMOV - Outlying Areas Could See Frost Saturday AM and Sunday AM Today: Expect lots of cloud cover today with temperatures nearing 80°. Isolated Severe Storms Remain Possible this Afternoon from 2PM- 7PM: This is a…
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Damaging Winds Possible in Illinois and Missouri ThursdayParts of Missouri and most of Illinois are likely to experience the type of thunderstorm you'd expect to see during the Spring months. Forecasters are warning of a possible damaging wind event that will likely leave…
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Another beautiful day ahead for Central IllinoisDECATUR, Ill. (WAND) – If you’re looking for a reason to get outside, Tuesday is your day. A high-pressure system settling over the Midwest is bringing abundant sunshine and calm winds to Central Illinois, with…
- Central Illinois Winter Weather Outlook
The winter weather outlook for central and southeast Illinois has been released, and a detailed summary is available at this link. Some of the highlights: Current Conditions Latest Observations Daily Climate Maps…
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One of the year’s most pleasant weather stretches arrives in Central IllinoisDECATUR, Ill. (WAND) – A beautiful stretch of sunshine and mild temperatures is settling into the region, and it’s the perfect time to get outside and enjoy it. High pressure is taking control of the Midwest, locking in…
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A great week ahead for Central IllinoisWAND DECATUR, Ill. (WAND) – A wonderful weekend across Central Illinois carries into the start of the workweek. Overnight lows dip back into the upper 30s tonight with a small risk for patchy frost, though coverage will…
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Sunshine, chilly mornings and a big warm-up ahead for central IllinoisCENTRAL ILLINOIS (25News Now) - Fall is making an appearance across central Illinois this weekend, but don’t get too comfortable with the chilly temperatures. After a cold start on Sunday morning, sunshine will help…
Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Forecast
- WedModerate
- ThuModerate
- FriModerate
St. Louis (Metro-east), IL reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyAlton - Melvin Price L&d, records since 1943. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- St. Louis 30 km
- Saint Charles 53 km
- Florissant 40 km
- Belleville 25 km
- Oakville 47 km
- University City 39 km
- Upper Alton 32 km
- Granite City 24 km
- O'Fallon 15 km
- Mehlville 46 km
- Kirkwood 49 km
- Maryland Heights 49 km
Forecasters' discussion
From the National Weather Service office in LSX, issued 9 hrs ago
Key Messages
- Seasonably warm and dry weather will last through this weekend.
Short Term
Issued at 257 AM CDT Wed Oct 21 2026
No significant changes have been made to the forecast. The mid-level omega blocking pattern and surface high pressure influence will keep our sensible weather consistently dry, and insolation will act as the sole driver for our gradually warming temperatures. Expect highs generally in the mid-70s today and tomorrow with lows in the 40s to low-50s in between.
Long Term
Issued at 257 AM CDT Wed Oct 21 2026
The pattern begins to change late this week. A mid-level longwave trough circling over the Four Corners area is expected to split, with its poleward section phasing into another trough traversing western Canada. This shift will pull a cold front into the Upper Midwest Saturday and orient it zonally on Sunday as the shortwave zips into eastern Canada. The Mid-Mississippi Valley will remain well south of the cold front over the weekend, and our temperature trends will reflect that. LREF probabilities of 1pm temperatures >69 degrees Saturday and Sunday both range from 75-100%, and the NBM max temperature spread for each day is only 3 degrees. The cold front is expected to finally push into the region on Tuesday, but cooler weather is not guaranteed especially for locations south of I-70. Guidance suggests that the front may be weakening as it arrives, and that it may become stationary before it clears the area. This would mean that less cool air would filter into less of the CWA and that the warm streak may continue through Tuesday. Confidence in this, or for any solution, is still very low given the timeframe in question. Again, the NBM max temperature spread reflects this well as it climbs to 10+ degrees on Tuesday and nearly 20 degrees on Wednesday.
Aviation
Issued at 1157 AM CDT Wed Oct 21 2026
Surface high pressure is located across eastern OH/ western PA with mid clouds approaching the region from the west. VFR conditions are forecast to persist through the afternoon into the evening. Another upper level wave will move across southern Canada, helping to retrograde the surface ridge axis back to the northwest late this evening. Winds at the TAF sites will slowly back from the northeast before decoupling. Thursday morning, another round of morning river valley fog appears likely as winds go calm. The greatest threat for restrictions in visibilities will be at KSUS, while slightly lower chances at KJEF and KCPS. As the sun rises, mixing will quickly commence bringing an end to the river valley fog. VFR Thursday with no precipitation expected.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.