National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

60°F

16°C

Humidity 32%
Wind Speed NW 9 mph
Barometer 29.99 in (1015.7 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 1 May 5:51 pm CDT
Extended Forecast for

Saint John MO

  • Tonight

    Tonight: Partly cloudy, with a low around 42. Northwest wind around 6 mph becoming calm in the evening.

    Low: 42 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 61. North wind 6 to 9 mph.

    High: 61 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 44. Northwest wind around 6 mph becoming calm.

    Low: 44 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76. Southwest wind 6 to 13 mph, with gusts as high as 23 mph.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 56. Southwest wind 7 to 9 mph. Chance of precipitation is 40%.

    Low: 56 °F

    Chance
    T-storms

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 80. Chance of precipitation is 30%.

    High: 80 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 57. Chance of precipitation is 60%.

    Low: 57 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 68. Chance of precipitation is 80%.

    High: 68 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 48. Chance of precipitation is 60%.

    Low: 48 °F

    Showers
    Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 42. Northwest wind around 6 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 61. North wind 6 to 9 mph.
Saturday Night
Mostly clear, with a low around 44. Northwest wind around 6 mph becoming calm.
Sunday
Sunny, with a high near 76. Southwest wind 6 to 13 mph, with gusts as high as 23 mph.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 56. Southwest wind 7 to 9 mph. Chance of precipitation is 40%.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 80. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 57. Chance of precipitation is 60%.
Tuesday
Showers and possibly a thunderstorm. High near 68. Chance of precipitation is 80%.
Tuesday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 48. Chance of precipitation is 60%.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 63.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 46.
Thursday
Mostly sunny, with a high near 66.
Thursday Night
Partly cloudy, with a low around 47.
Friday
Sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint John MO
 38.71°N 90.34°W (Elev. 597 ft)
Last Update:
4:31 pm CDT May 1, 2026
Forecast Valid:
6pm CDT May 1, 2026-6pm CDT May 8, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation