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Crystal City, MO Weather
Current conditions
Forecast for this hour (no station report in the last two hours)
Forecast
10-day-
Saturday
Sunny, with a high near 77. East wind 0 to 3 mph.
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Saturday Night
Partly cloudy, with a low around 44. Southeast wind 0 to 3 mph.
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Sunday
Mostly sunny. High near 80, with temperatures falling to around 76 in the afternoon. Southeast wind 0 to 3 mph.
National Weather Service forecast updated 1 day ago.
Hourly
Hourly forecast- Now67°
- 12 PM71°
- 1 PM74°
- 2 PM75°
- 3 PM76°
- 4 PM77°
- 5 PM75°
- 6 PM72°
- 7 PM67°
- 8 PM61°
- 9 PM57°
- 10 PM55°
- 11 PM53°
- Sun12 AM52°
- 1 AM51°
- 2 AM50°
- 3 AM48°
- 4 AM47°
- 5 AM46°
- 6 AM44°
- 7 AM45°
- 8 AM50°
- 9 AM56°
- 10 AM62°
Daily forecast
DetailsRadar
Full mapWeather news in Missouri
More weather news-
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Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Bonne Terre, MO reporting area · 2 hrs ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Nearby
- St. Louis 48 km
- Chesterfield 52 km
- Belleville 48 km
- Oakville 28 km
- Wildwood 47 km
- University City 49 km
- Ballwin 44 km
- Granite City 57 km
- O'Fallon 58 km
- Mehlville 32 km
- Kirkwood 40 km
- Maryland Heights 55 km
Forecasters' discussion
From the National Weather Service office in LSX, issued 4 hrs ago
Key Messages
- A stagnant pattern remains in place keeping warm and dry conditions through the end of the week.
Short Term
Issued at 228 AM CDT Sat Oct 24 2026
A slow moving upper-level ridge remains over the central CONUS keeping dry and seasonably warm conditions in the Mid-Mississippi Valley through the weekend and into Monday. As a result, very little change in the weather day-to-day is expected. The only change is the presence of some upper-level clouds. The stubborn ridge continues to drive high temperatures into the mid to upper 70s, with some areas possibly exceeding 80 on Sunday depending on the thickness of the clouds. Dry air will allow for radiative cooling overnight keeping low temperatures in the upper 40s to low 50s, with the 40s predominately being in the river valleys and southeastern MO and southwestern IL. This is due to the presence of fewer clouds in that region, which will allow for more efficient radiative cooling overnight.
Long Term
Issued at 228 AM CDT Sat Oct 24 2026
Over the western CONUS, a deep upper-level trough is present and is expected to propagate to the northeast toward the north-central CONUS and into the Midwest during the middle of the week. Guidance is in good consensus that as the trough tracks northeast it will reduce the amplitude of the ridge over the region. The current forecasted track of the trough will cause the associated cold front to stay well to the north of the region, resulting in dry and seasonably warm conditions in the region continuing through the entire week. High temperatures will remain in the 70s each day.
Earlier guidance had indicated a potential pattern change at the end of the week, but latest model trends indicate stronger confidence that the ridge remains in place through the end of the week. Yesterday, the NBM and LREF guidances continued to hint at the possibility of a cold front coming at the end of the week with IQRs of 10-15 degrees for Thursday and Friday, but latest runs have IQRs of 5-10 degrees by raising the 25th percentile from being in the 60s to being in the low 70s. At the same time, this model trend has also decreased the chance of rain at the end of the week down to 10-30 percent on Friday while increasing the chances the following weekend ahead of the potential cold front.
Aviation
Issued at 613 AM CDT Sat Oct 24 2026
VFR conditions will prevail through the TAF period. There remains a slight chance for patchy fog around SUS and CPS early this morning, but observations the last couple of mornings have shown it clearing to VFR visibilities by 12Z.
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.