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Saint Louis City
 Details for Saint Louis City Flood Watch  +1 additional alert
USA Weather Finder
Flood Watch FLOOD WATCH - Saint Louis City  - Saint Louis County

Regional Radar Regional Visible Satellite
Radar/Satellite images courtesy of Weather Underground.
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Updated: @ 18-May-2026 11:50pm - next update at 11:55pm  
Summary / Temperature Wind Rain Outlook
mostly clear mostly clear
Currently: 65.3, Max: 78.4, Min: 64.6 65.3°F
Colder 0.2°F than last hour.

Comfortable

Feels like: 65.3°F

24-hr difference
-11.9°FColder 11.9°F than yesterday at this time.
  Today Yesterday
High: 78.4°F
9:08am 		91.2°F
5:59pm
Low: 64.6°F
6:46pm 		64.9°F
5:51am
Wind from S S
0.5
Gust:
 0 mph
0 Bft - Calm
Today: 19.6 mph 7:00pm
Gust Month: 53.8 mph May 9
Rain Today: 1.21 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0 in
Storm Rain: 0 in
This Month: 1.66 in
Season Total: 11.39 in
6 rain days in May.
Tuesday

Tuesday: Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Chance Showers And T-Storms then Showers And T-Storms Likely
Humidity & Barometer Almanac Moon
Humidity: 91 % Decreased 1.0% since last hour.
Dew Point: 62.6°F Decreased 0.5°F since last hour.
Barometer: 29.979 inHg  
Baro Trend: Steady
Sunrise: 5:46am
Sunset: 8:08pm
Moonrise: 8:05am
Moonset: 10:53pm
Waxing Crescent
Waxing Crescent, Moon at 2 days in cycle
9%
Illuminated
UV Index Solar Radiation
   0.0    None
High: 0.0 @ 6:03am
0 W/m2 (0 %)
High: 16 @  6:28am
 NWS Weather Forecast  - Outlook: Tonight & Tuesday
Tonight

Tonight: Mostly Cloudy then Chance Showers And Thunderstorms
Mostly Cloudy then Chance Showers And T-Storms

Lo 66 °F		 NWS forecast: A slight chance of rain showers between 3am and 4am, then a chance of showers and thunderstorms. Mostly cloudy. Low around 66, with temperatures rising to around 71 overnight. South wind around 12 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
 
Tuesday

Tuesday: Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Chance Showers And T-Storms then Showers And T-Storms Likely

Hi 82 °F		 NWS forecast: A chance of showers and thunderstorms before 10am, then showers and thunderstorms likely. Mostly cloudy. High near 82, with temperatures falling to around 76 in the afternoon. Southwest wind 8 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.