| NWS Forecast for: Frontenac MO Issued by: National Weather Service Saint Louis, MO Last Update: 3:06 am CDT Mar 12, 2026 |  |
| Overnight: Clear, with a low around 32. Northwest wind around 7 mph. Thursday: Sunny, with a high near 57. Light and variable wind becoming southwest 5 to 9 mph in the morning. Thursday Night: Increasing clouds, with a low around 45. South wind 10 to 18 mph, with gusts as high as 37 mph. Friday: Mostly sunny, with a high near 61. West wind 14 to 16 mph, with gusts as high as 29 mph. Friday Night: Partly cloudy, with a low around 38. Northwest wind 5 to 7 mph becoming light and variable. Saturday: Partly sunny, with a high near 65. Saturday Night: Mostly cloudy, with a low around 54. Sunday: Rain likely and possibly a thunderstorm, then rain after 1pm. High near 68. Chance of precipitation is 80%. Sunday Night: Rain likely, possibly mixed with snow before 1am, then a chance of snow. Mostly cloudy, with a low around 23. Blustery. Chance of precipitation is 60%. Monday: Mostly sunny, with a high near 34. Breezy. Monday Night: Mostly clear, with a low around 17. Tuesday: Partly sunny, with a high near 41. Tuesday Night: A slight chance of rain and snow. Mostly cloudy, with a low around 32. Chance of precipitation is 20%. Wednesday: Partly sunny, with a high near 60. | |
| Frontenac MO 38.62°N 90.4°W (Elev. 597 ft) | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |
