| NWS Forecast for: Frontenac MO Issued by: National Weather Service Saint Louis, MO Last Update: 1:21 am CST Mar 6, 2026 | |
Overnight: Patchy dense fog before 5am. Otherwise, mostly cloudy, with a low around 55. Southeast wind 5 to 7 mph. Friday: Partly sunny, with a high near 78. South wind 8 to 15 mph, with gusts as high as 28 mph. Friday Night: Rain and thunderstorms likely, then rain and possibly a thunderstorm after 3am. Low around 62. South wind 11 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. Saturday: A chance of rain and thunderstorms before 9am, then a chance of rain between 9am and noon. Cloudy, then gradually becoming mostly sunny, with a temperature rising to near 65 by 9am, then falling to around 59 during the remainder of the day. Southwest wind 10 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 50%. Saturday Night: Partly cloudy, with a low around 40. Northwest wind 5 to 9 mph becoming calm after midnight. Sunday: Sunny, with a high near 67. Sunday Night: Clear, with a low around 50. Monday: Sunny, with a high near 79. Monday Night: A 30 percent chance of rain, mainly after midnight. Mostly clear, with a low around 59. Tuesday: Rain likely, with thunderstorms also possible after noon. Partly sunny, with a high near 78. Chance of precipitation is 70%. Tuesday Night: Rain and possibly a thunderstorm. Low around 56. Chance of precipitation is 90%. Wednesday: Rain likely. Mostly cloudy, with a high near 67. Chance of precipitation is 70%. Wednesday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 39. Thursday: Mostly sunny, with a high near 58. | |
| Frontenac MO 38.62°N 90.4°W (Elev. 597 ft) | |
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