Current Weather
3:21 PM
79°F
Mostly cloudy
RealFeel® 87°
Very Warm
RealFeel Shade™ 83°
Very Warm
RealFeel®
87°
RealFeel Shade™
83°
Heat Index
80°
Max UV Index
2.6 (Moderate)
Wind
SSW 4 mph
Wind Gusts
11 mph
Humidity
83%
Indoor Humidity
83% (Extremely Humid)
Dew Point
73° F
Pressure
↓ 29.69 in
Cloud Cover
76%
Visibility
11 mi
Cloud Ceiling
9500 ft
Day
6/21
79°Hi
RealFeel®
88°
Very Warm
RealFeel Shade™
83°
Pleasant
Cloudy and humid with heavy thunderstorms; storms can bring downpours, damaging winds and even an isolated tornado
Max UV Index10.0 (Very High)
AccuLumen Brightness Index™2 (Dark)
WindSSW 9 mph
Wind Gusts18 mph
Probability of Precipitation99%
Probability of Thunderstorms80%
Precipitation0.59 in
Rain0.59 in
Hours of Precipitation5.5
Hours of Rain5.5
Cloud Cover90%
Night
6/21
63°Lo
RealFeel®
61°
Cool
A thunderstorm in spots this evening; otherwise, cloudy
WindNW 10 mph
Wind Gusts15 mph
Probability of Precipitation55%
Probability of Thunderstorms33%
Precipitation0.13 in
Rain0.13 in
Hours of Precipitation1
Hours of Rain1
Cloud Cover96%
Sun & Moon
14 hrs 53 mins
Rise
5:38 AM
Set
8:31 PM
First Quarter
Rise
12:59 PM
Set
12:59 AM
Temperature History
6/21High
Low
Forecast
79°
63°
Average
86°
65°
Last Year
94°
78°
Current Weather Conditions in O'Fallon
O'Fallon, Missouri is currently Mostly cloudy with a temperature of 79°. The current RealFeel® Temperature is 87° (Very Warm) based on observed conditions including 83% humidity, 76% cloud cover, a UV index of 3, and winds of 4 mph. In shade, the RealFeel Shade™ is 83°. AccuWeather's MinuteCast® provides minute-by-minute precipitation forecasts for O'Fallon, powered by forecasting systems and proprietary technology developed by AccuWeather meteorologists since 1962.
