Citizen station EW2862EW2862
In a volunteer observer's own ground/0.4 mi away/501 ft/63 ft below here
temp, humidity, wind, precip, pressure
Lake St. Louis, Missouri
City in St. Charles County, Missouri48°
57°/43°
Mostly clear·
Feels like 44°·Gentle breeze 10 mph NW
Now. Lake St. Louis is 48° and mostly clear at 8 AM. With the wind it feels like 44°. The dew point is 40°, so the air feels dry and comfortable. Gentle breeze from the northwest at 10 mph, gusting to 22 mph.
Today and tonight. It warms to about 56° by 2 PM. Tonight falls to about 38° by 7 AM, under a mostly clear sky. No rain is expected for the rest of the day.
The week. The warmest day ahead is Thursday, near 79°, and the coolest tomorrow, near 60°. The days ahead look dry. Frost is possible Sunday morning, a low of 35°.
The sky tonight. The sun sets at 6:23 PM. The Moon is a waxing crescent, 33% lit, and sets at 10:23 PM. The next full Moon is Sunday, Oct 25. After dark, look for Saturn, bright in the east-southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. The sky is forecast to stay clear: a good night to look up. The day is 11 hours 11 minutes long, 3 minutes shorter than yesterday.
0UV Low
23Air quality
71%Humidity
17%Cloud
Now
8:00 AM
48feels44
now, mostly clear
Today
Oct 16
5743
18%
19mph
Sat
Oct 17
6037
UV 6
Sun
Oct 18
6635
UV 6
Mon
Oct 19
7238
overcast
Tue
Oct 20
7440
overcast
Wed
Oct 21
7742
overcast
Thu
Oct 22
7947
overcast
48°
57°43°
60°37°
66°35°
72°38°
74°40°
77°42°
79°47°
As of 8:00 AM in Lake St. Louis, Missouri.
Air quality
The air at Lake St. Louis
Index 23, good, led by fine particles. Read at 7 AM from its reporting area, Saint Louis (MO), 12 miles off.
23Good
- Fine particles (PM2.5)23Good-
- Ozone21Good16 ppb17.3 mi
- Coarse particles (PM10)21Good-
- Nitrogen dioxide1Good1.6 ppb18 mi
- Sulfur dioxide0Good0.2 ppb18 mi
The days ahead
Yesterday measured 40, good.
GoodModerate
- 40YesterdayOct 15
Smoke, the next 42 hours
No smoke near the ground through Sun 1 AM.
Precipitation
What has fallen at Lake St. Louis
1.05 in in the last 24 hours, 1.55 in over the last 3 days, to Fri 6 AM. Measured by radar and rain gauges, as water.
- Last 24 hours
- 1.05in
- Last 3 days
- 1.55in
3 days agoLast 24 hours 68%
Visibility
How far you can see at Lake St. Louis, the next 42 hours
Visibility stays 7 miles or more through Sun 1 AM, lowest 7 miles Fri 4 PM.
F
Now, today, and the week
On the radar over Lake St. Louis, MissouriReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture
Weather instrument stations by state
What is measuring near here
The 6 instruments nearest Lake St. Louis, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.
measured now4 instruments
Rank860of 1,014
At an airfield/11.3 mi away/463 ft/101 ft below here
temp, wind, gust, visibility, precip, pressure
Mississippi River AT Winfield LD25CAGM7
At a river or reservoir gauge/15.5 mi away/427 ft/137 ft below here
temp, wind, gust, humidity, pressure
Shaw Nature ReserveS2227
At a soil climate station/21.3 mi away/623 ft/59 ft above here
temp, humidity, soil temp, soil moisture
measured daily2 instruments
Lake St Louis 1.7 WSWMO-SS-55
In a volunteer observer's own ground/1.7 mi away/584 ft/20 ft above here
precip, snowfall, snow depth
Dardenne Pr 1 NWDARM7
At a cooperative observer's station/2.9 mi away/623 ft/59 ft above here
snowfall, snow depth, precip, high, low
Station report
The weather at St. Louis/Spirit, drawn
The nearest airport reporting now, 11.3 mi from Lake St. Louis, Missouri. From its report of Oct 16, 2026, 7:54 AM local time: 3 of its 6 sheets.
The sky
No cloud below 12,000 ft; visibility 10 mi or more.
The air
49.0 F with a dew point of 40.0 F, 71 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,100 ft up.
The wind
From the west (280 degrees) at 10 mph, gusting 22 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 26 mph.
The full report of St. Louis/Spirit, in 6 sheets, each beside the Field Book plates that explain it
What the snow tracker reads here
Every instrument in this state
0in
Snow on the ground
Measured at Dardenne Pr 1 NW (DARM7), 2.9 miles from here, read 14 Oct, 07:00. measured daily
Elsewhere in Missouri
24 places, each with its own forecast and its own instruments.
BransoncityCape GirardeaucityColumbiacityHannibalcityHidden Valleyski areaIndependencecityJefferson CitycityJoplincityKansas CitycityKirksvillecityLake of the OzarksfeatureMark Twain National ForestfeatureMaryvillecityPoplar BluffcityRollacitySedaliacitySikestoncitySnow Creekski areaSpringfieldcitySt CharlescitySt JosephcitySt LouiscityTable Rock LakefeatureWest Plainscity
Near Lake St. Louis
The nearest places, each with its own forecast and the instruments nearest it.
- Josephvillevillage, 3 mi
- O'Falloncity, 4 mi
- Dardenne Prairiecity, 4 mi
- St. Paulcity, 5 mi
- Wentzvillecity, 5 mi
- New Mellecity, 7 mi
- Cottlevillecity, 8 mi
- Flint Hillcity, 8 mi
- Weldon Spring Heightstown, 8 mi
- Weldon Springcity, 9 mi
- Chain of Rocksvillage, 9 mi
- St. Peterscity, 10 mi