My Profile
  1. Member Settings
  2. My Devices
  3. Sign Out
Log In
    Favorites
        More Settings
      Air Quality Alert
      until 1:45 AM CDT
      Elev 518 ft, 38.766 °N 90.690 °W

      St. Peters, MO

      Pennial Park Station82°
      Updated: 10:10 PM CDT on September 8, 2026 (GMT -5)
      59 seconds ago
      94°
      63°
      82
      Feels Like 84
      Clear
      N
      2
      Similar temperature is expected tomorrow
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Tonight
        Wed 09/09
        Low 75°f
         4% Precip. / 0 in
        Clear skies. Low around 75F. Winds light and variable.
        Tomorrow
        Thu 09/10
        High 95°f
         64% Precip. / 0.08 in
        Partly cloudy skies during the morning hours. Thunderstorms likely in the afternoon. Storms may contain strong gusty winds. High near 95F. Winds WSW at 5 to 10 mph. Chance of rain 60%.
        Tomorrow night
        Thu 09/10
        Low 70°f
         97% Precip. / 0.78 in
        Thunderstorms likely. Storms may contain strong gusty winds. Low near 70F. Winds light and variable. Chance of rain 100%.
        Hourly Forecast
        Now
        81°
        11PM
        80°
        12AM
        79°
        1AM
        78°
        2AM
        76°
        3AM
        76°
        4AM
        76°
        5AM
        76°
        6AM
        76°
        6:39AM
        Sunrise
        7AM
        76°
        8AM
        79°
        9AM
        83°
        10AM
        86°
        11AM
        89°
        12PM
        34%
        92°
        1PM
        92°
        2PM
        93°
        3PM
        93°
        4PM
        35%
        91°
        5PM
        88°
        6PM
        64%
        85°
        7PM
        72%
        82°
        7:20PM
        Sunset
        8PM
        35%
        79°
        9PM
        34%
        77°
        10PM
        50%
        75°
        Precipitation
        72%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        71
        Moderate
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30.02 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point65°F
        5. Humidity 58%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KSUS Station History
        Almanac for September 9, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 94°F 82°F 99°F 1960
        4. Low 63°F 60°F 43°F 1986
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.4 in -
        7. Snow 0 in 0 in -
        Almanac for September 10, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 95°F 82°F 97°F
        4. Low 63°F 59°F 43°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:39 AM 7:20 PM
        3. Civil Twilight 6:12 AM 7:47 PM
        4. Nautical Twilight 5:40 AM 8:18PM
        5. Astronomical Twilight 5:07 AM 8:51 PM
        1. Length of Visible Light 13h 35m
        2. Length of Day 12h 41m
        3. Tomorrow will be 2 minutes 28 seconds shorter
        1. Moon 4:50 AM 6:36 PM
        2. Waning Crescent3% of the Moon is Illuminated
        Sep 10
        New Moon
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Precipitation
        Loading…
        Health
        Loading…
        Weather Alerts
        Loading…
        Our AppsAbout UsContactCareersWeather Data APIs
        PWS NetworkWundermap
        Terms of UsePrivacy PolicyCookie NoticeAccessibility StatementAdChoicesData Vendors
        essentialaccessibility.com
        We recognize our responsibility to use data and technology for good. We may use or share your data with our data vendors. Take control of your data.
        Review All Privacy and Ad Settings
        Choose how my information is shared
        Data Rights
        The Weather Company The Weather Channel Weather Underground Storm Radar
        © The Weather Company, LLC 2026
        Glossary