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Belleville, IL Weather
Current conditions
Observed at St. Louis Downtown Airport · 47 min ago
Forecast
10-day-
Wednesday
Sunny, with a high near 73. East wind around 2 mph.
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Wednesday Night
Mostly clear, with a low around 48. North wind around 2 mph.
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Thursday
Sunny, with a high near 76. Northeast wind around 2 mph.
National Weather Service forecast updated 1 day ago.
Hourly
Hourly forecast- Now53°
- 10 AM60°
- 11 AM64°
- 12 PM67°
- 1 PM71°
- 2 PM71°
- 3 PM72°
- 4 PM72°
- 5 PM71°
- 6 PM69°
- 7 PM65°
- 8 PM59°
- 9 PM57°
- 10 PM56°
- 11 PM55°
- Thu12 AM54°
- 1 AM53°
- 2 AM52°
- 3 AM51°
- 4 AM50°
- 5 AM48°
- 6 AM48°
- 7 AM48°
- 8 AM51°
Daily forecast
Details- TueOct 20Sunny48°72°
- TodayOct 21Sunny48°73°
- ThuOct 22Sunny49°76°
- FriOct 23Sunny49°75°
- SatOct 24Mostly Sunny52°76°
- SunOct 25Partly Sunny52°78°
- MonOct 26Partly Sunny49°75°
- TueOct 27Cloudy0.03 in51°61°
- WedOct 28Mostly sunny43°58°
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…
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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 22 km
- Saint Charles 52 km
- Florissant 42 km
- Chesterfield 54 km
- Oakville 28 km
- Wildwood 59 km
- University City 32 km
- Ballwin 50 km
- Upper Alton 46 km
- Granite City 25 km
- O'Fallon 10 km
- Mehlville 30 km
Forecasters' discussion
From the National Weather Service office in LSX, issued 2 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 1000 PM CDT Tue Oct 20 2026
Fog will dissipate soon after sunrise. After that, dry and VFR conditions with very light south-southwesterly winds will prevail. There is a potential for river fog again tonight, but will add to TAFs when confidence in timing increases.
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.