St. Louis, MO Weather

City of Saint Louis County4:37 PM CDT38.63°N, 90.20°WElevation 466 ft

Current conditions

Sunny
76°
Sunny
Feels like 76°
High 76°·Low 49°
WindSE 5 mph
Humidity34%
Dew point46°
Visibility10 mi
Cloud cover10%
UV index1 Low
Sunrise7:19 AM
Sunset6:13 PM

Forecast for this hour (no station report in the last two hours)

Forecast

10-day

  • Friday

    Patchy fog before 9am. Sunny, with a high near 76. Southeast wind 1 to 5 mph.

  • Friday Night

    Mostly clear, with a low around 49. Southeast wind 1 to 5 mph.

  • Saturday

    Mostly sunny, with a high near 76. Southeast wind around 3 mph.

National Weather Service forecast updated 20 hrs ago.

Hourly

Hourly forecast
  1. Now Sunny 76°
  2. 5 PM Sunny 74°
  3. 6 PM Clear 71°
  4. 7 PM Clear 66°
  5. 8 PM Clear 61°
  6. 9 PM Clear 59°
  7. 10 PM Clear 58°
  8. 11 PM Clear 56°
  9. Sat12 AM Mostly Clear 56°
  10. 1 AM Mostly Clear 54°
  11. 2 AM Mostly Clear 53°
  12. 3 AM Mostly Clear 52°
  13. 4 AM Partly Cloudy 51°
  14. 5 AM Partly Cloudy 50°
  15. 6 AM Mostly Sunny 50°
  16. 7 AM Mostly Sunny 50°
  17. 8 AM Mostly Sunny 50°
  18. 9 AM Mostly Sunny 55°
  19. 10 AM Mostly Sunny 60°
  20. 11 AM Mostly Sunny 65°
  21. 12 PM Mostly Sunny 69°
  22. 1 PM Mostly Sunny 73°
  23. 2 PM Mostly Sunny 74°
  24. 3 PM Mostly Sunny 75°

10-day forecast

Details
  1. TonightOct 22 Clear Clear49°
  2. TodayOct 23 Patchy Fog then Sunny Patchy Fog then Sunny49°76°
  3. SatOct 24 Mostly Sunny Mostly Sunny51°76°
  4. SunOct 25 Mostly Sunny Mostly Sunny53°79°
  5. MonOct 26 Partly Sunny Partly Sunny52°78°
  6. TueOct 27 Partly Sunny Partly Sunny52°74°
  7. WedOct 28 Mostly Sunny Mostly Sunny15%51°74°
  8. ThuOct 29 Slight Chance Rain Showers then Mostly Sunny Slight Chance Rain Showers then Mostly Sunny15%73°
  9. FriOct 30 Cloudy Cloudy46°59°
  10. SatOct 31 Cloudy Cloudy0.12 in49°64°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news near St. Louis

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Air quality

93
Moderate
Ozone

Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Forecast

  • FriModerate
  • SatModerate
  • SunModerate

St. Louis (Metro-east), IL reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:19 AM
Sunset 6:13 PM
Daylight 10 h 54 min (−2 min 21 s tomorrow)
Waxing Gibbous · 94% lit
Moonrise 4:39 PM Moonset 4:30 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low66° / 46°
Record high86° (1939)
Record low28° (1981)
Wettest1.38 in (1976)
Yesterday76° / 50°
Month to date1.76 in (normal 2.16 in)

St Louis Area, records since 1874. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in LSX, issued 2 hrs ago

Key Messages

- High pressure remains in place allowing for our dry and warm weather continues well into next week.

Short Term

Issued at 148 PM CDT Fri Oct 23 2026

An upper-level ridge will remain positioned over the Mid-Mississippi River Valley through Sunday, stagnated by the configuration of the wave pattern into an Omega Block. This pattern will result in very little change in sensible weather from day to day with seasonably warm temperatures and dry conditions. The only change through the weekend will be the very slow departure of a surface high pressure center and upper-level clouds of varying thickness streaming overhead by Saturday through Sunday. The most pronounced nocturnal radiational cooling during the period will be across southeastern MO/southwestern IL and/or river valleys with low temperatures in the 40s F and patchy morning fog, mainly low temperatures in the 50s F elsewhere. High temperatures will continue to be in the 70s F, near 80 F on Sunday depending on the thickness of cloud cover.

Long Term

Issued at 148 PM CDT Fri Oct 23 2026

Global model guidance is coming into better agreement on the ejection of an upper-level trough into the Central/Northern Plains and Upper Midwest Monday through Tuesday as the Omega Block breaks down. With this track of the trough, it is increasingly likely that the associated cold front does not reach the CWA, favoring similar, seasonably warm temperatures continuing along with dry conditions.

It is not until late next week now, that there are any signs for our sensible weather to change with varying signals for an upper-level trough to propagate into the north-central CONUS. However, the track and amplitude of the trough is uncertain which will influence its ability to force an associated cold front east/southeastward. If the front reaches the CWA, it would be accompanied by an opportunity for rain and temperatures cooling closer to average late next week. If the front fails to reach the CWA, there would be no clear catalyst for seasonably warm temperatures and dry conditions to end. Ensemble model guidance cluster analysis depicts these scenarios all being valid possible outcomes at this point. Taking all scenarios into consideration, probabilities of measurable rainfall range from 20 to 50 percent Thursday, onward, along with NBM interquartile ranges increasing to between 10 and 20 F.

Aviation

Issued at 1147 AM CDT Fri Oct 23 2026

Aside from another round of fog in area river valleys Saturday morning potentially impacting KSUS and KCPS, dry and VFR flight conditions will prevail. Winds are expected to remain light and either southerly/southeasterly or variable.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.