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I-255 IL weather conditions near Saint Louis, Missouri

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       Current Weather Conditions

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7 day weather forecast

  • Current condition: Fair 90°F 2025-07-11T10:53:00-05:00
  • This Afternoon 2025-07-11, Slight Chance T-storms. A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 95. Heat index values as high as 104. South wind around 9 mph.
  • Tonight 2025-07-11, Chance T-storms. A 30 percent chance of showers and thunderstorms, mainly between 2am and 4am. Partly cloudy, with a low around 74. South wind around 7 mph.
  • Saturday 2025-07-12, Chance T-storms. A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 90. Southwest wind 6 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
  • Saturday Night 2025-07-12, Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. West wind around 6 mph becoming calm in the evening.
  • Sunday 2025-07-13, Chance T-storms. A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 89. Calm wind becoming west around 5 mph in the afternoon.
  • Sunday Night 2025-07-13, Partly Cloudy. Partly cloudy, with a low around 70.
  • Monday 2025-07-14, Mostly Sunny. Mostly sunny, with a high near 92.
  • Monday Night 2025-07-14, Mostly Cloudy. Mostly cloudy, with a low around 73.
  • Tuesday 2025-07-15, Partly Sunny then Slight Chance T-storms. A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 94.
  • Tuesday Night 2025-07-15, Slight Chance T-storms. A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74.
  • Wednesday 2025-07-16, Slight Chance Showers then Chance T-storms. A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
  • Wednesday Night 2025-07-16, Chance T-storms. A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
  • Thursday 2025-07-17, Slight Chance Showers then Chance T-storms. A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.





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