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Belleville, IL 62221 Weather
Current conditions
Observed at St. Louis Downtown Airport · 31 min ago
Forecast
10-day-
Tonight
Mostly clear, with a low around 46. East wind around 2 mph.
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Wednesday
Sunny, with a high near 74. East wind around 2 mph.
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Wednesday Night
Mostly clear, with a low around 49. Northeast wind around 2 mph.
National Weather Service forecast updated 4 hrs ago.
Hourly
Hourly forecast- Now52°
- 1 AM51°
- 2 AM50°
- 3 AM49°
- 4 AM48°
- 5 AM48°
- 6 AM47°
- 7 AM47°
- 8 AM49°
- 9 AM55°
- 10 AM61°
- 11 AM65°
- 12 PM69°
- 1 PM72°
- 2 PM73°
- 3 PM73°
- 4 PM73°
- 5 PM72°
- 6 PM69°
- 7 PM64°
- 8 PM61°
- 9 PM59°
- 10 PM58°
- 11 PM56°
10-day forecast
Details- TonightOct 20Mostly Clear46°
- TodayOct 21Sunny49°74°
- ThuOct 22Sunny47°76°
- FriOct 23Sunny48°75°
- SatOct 24Mostly Sunny50°78°
- SunOct 25Mostly Sunny51°79°
- MonOct 26Partly Sunny49°75°
- TueOct 27Partly Sunny69°
- WedOct 28Cloudy42°59°
- ThuOct 29Sunny37°57°
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 Belleville
More weather news- 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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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…
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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…
- Will colorful fall foliage peak soon in the metro-east? When to leaf peep
With October well underway, some leaves are beginning to turn in southwestern Illinois, but when will fall foliage peak? The southwestern Illinois region offers many picturesque spots to enjoy fall foliage, from hiking…
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This week's record heat caps hottest Jan.-Sept. on record in USIf it feels like summer never left, the numbers back you up. This week brought a fresh wave of record-breaking heat across the country, even as calendars flip toward Halloween. In a word: hot. According to U.S. National…
- Daily high-temperature records broken or tied on October 13 across parts of the central U.S.
Five daily high-temperature records were broken and one was tied at six sites across Kansas, Oklahoma, Missouri and Illinois on October 13, 2026. Temperatures at the sites reached 32.8–33.9°C (91–93°F), or 9.4–13.3°C…
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Tracking storms with heavy rain moving in late tonightTONIGHT: Warm with storms arriving late. Some storms may produce heavy rain and strong wind gusts. Lows in the upper 60s. TOMORROW: Rain and storms likely early, becoming more scattered by afternoon. Highs in the upper…
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Illinois to get brief taste of fall weather this weekMany different weather conditions are impacting Illinois this week. It started Monday with record heat. “Middle 90s in Metro East St. Louis,” said Meteorologist Paul Otto with Freese-Notis Weather during a Tuesday guest…
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A big cooldown will drop temperatures to their lowest levels in monthsA view of the Manhattan skyline illuminated at night, with autumn foliage in the foreground along the East River in New York City, on October 12. People visit Taughannock Falls State Park in Ithaca, New York, on October…
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
MonthlyBelleville Siu Research, records since 1948. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- St. Louis 23 km
- Saint Charles 53 km
- Florissant 42 km
- Chesterfield 55 km
- Oakville 31 km
- University City 33 km
- Ballwin 51 km
- Upper Alton 45 km
- Granite City 24 km
- O'Fallon 7 km
- Mehlville 32 km
- Kirkwood 39 km
Forecasters' discussion
From the National Weather Service office in LSX, issued 2 hrs ago
Key Messages
- Dry weather along with above normal temperatures are expected to continue through the week into this weekend.
Short Term
Issued at 226 PM CDT Tue Oct 20 2026
There's little change in the forecast this afternoon. An upper level ridge remains over the central CONUS sandwiched between troughs over both coasts. A sprawling surface ridge remains in control of the weather across the Great Lakes, Midwest, and Ohio Valley as well. The upper level omega block and surface ridge will remain in place through the short-term which will continue our stretch of uneventful weather. Temperatures across the forecast area are 3-5 degrees warmer today than yesterday, and it should continue to warm slowly tomorrow and Thursday due to good daytime insolation and light south to southeasterly flow.
Long Term
Issued at 226 PM CDT Tue Oct 20 2026
The omega block begins shifting east Thursday night, and the western trough moves over the Rockies by Friday evening. Medium range deterministic guidance shows the trough fracturing, and the resulting northern stream short wave moves across southern Canada and the northern Great Plains. The cold front attached to the surface reflection of the wave drifts through the Upper Midwest Saturday, and slows down to become nearly stationary across southern Minnesota, Michigan, and nothwest Iowa on Sunday. Models then show another upper level wave diving through southwest Canada Sunday night and into the northern Plains Monday where it phases with the left over southern stream energy. The combined positively tilted trough then digs southeast, which finally pushes the cold front through the Mid Mississippi Valley on Tuesday. All this adds up to continuing dry and warm weather for the Mid Mississippi Valley at least through the weekend south of the cold front, and probably for Monday and Tuesday as well. The LREF continues to show variance in the strength and position of the northern stream trough Friday/Saturday, and the combined trough Sunday through Tuesday. The variance mostly affects locations well north of our forecast area through the weekend. Temperature IQRs in the LREF are only 3-4 degrees in our area through Sunday. However, the IQR increases to 10 degrees across northeast Missouri and west central Illinois as the combined trough and cold front approach the area on Monday. The IQR spreads out to 10-15 degrees across the rest of the area on Tuesday as the members of the LREF attempt to push the front through. The deterministic NBM shows highs dropping from the mid and upper 70s on Sunday and Monday into the 60s Tuesday with the front. However, confidence in the forecast remains low early next week as guidance continues to have some issues with the placement of the front.
Aviation
Issued at 1000 PM CDT Tue Oct 20 2026
Mainly dry and VFR conditions are expected through the period with light winds.
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.