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As of 05:23 CDT

Weather in O'Fallon, MO

49°Current weather

O'Fallon, Thursday, 22 October, 05:23

Clear. Feels like 49°. High 76°, low 49°.

Pressure30.24 inHg
Wind1 mph W
Humidity86%
Visibility6.2 mi
Dew point45°

10-day forecast for O'Fallon, MO: 48° to 76°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.

76°
Best day: Thursday, October 22
63° · 0.37 in
Worst day: Saturday, October 31

Tap any day below to see morning, afternoon, evening and overnight.

Fri, 2375° / 48°0Clear
MorningClear51°feels 50°
AfternoonMostly clear75°feels 74°
EveningClear61°feels 60°
OvernightClear52°feels 50°
75 °Clear

O'Fallon, Friday, 23 October

Clear. High 75°, low 48°.

Pressure30.27 inHg
Wind5 mph SE
Humidity50%
Visibility6.2 mi
Dew point50°
Sat, 2472° / 51°0Overcast
MorningOvercast52°feels 51°
AfternoonOvercast71°feels 70°
EveningOvercast60°feels 59°
OvernightOvercast55°feels 54°
72 °Overcast

O'Fallon, Saturday, 24 October

Overcast. High 72°, low 51°.

Pressure30.36 inHg
Wind5.3 mph SE
Humidity52%
Visibility6.2 mi
Dew point50°
Sun, 2575° / 50°0Partly cloudy
MorningClear51°feels 50°
AfternoonOvercast74°feels 73°
EveningOvercast62°feels 61°
OvernightOvercast55°feels 53°
75 °Partly cloudy

O'Fallon, Sunday, 25 October

Partly cloudy. High 75°, low 50°.

Pressure30.39 inHg
Wind2.4 mph S
Humidity51%
Visibility6.2 mi
Dew point52°
Mon, 2673° / 53°0Overcast
MorningOvercast58°feels 57°
AfternoonOvercast70°feels 69°
EveningOvercast64°feels 63°
OvernightOvercast55°feels 54°
73 °Overcast

O'Fallon, Monday, 26 October

Overcast. High 73°, low 53°.

Pressure30.33 inHg
Wind3.9 mph E
Humidity49%
Visibility—
Dew point49°
Tue, 2772° / 53°0Mostly clear
MorningMostly clear59°feels 58°
AfternoonMostly clear71°feels 70°
EveningMostly clear63°feels 62°
OvernightMostly clear60°feels 59°
72 °Mostly clear

O'Fallon, Tuesday, 27 October

Mostly clear. High 72°, low 53°.

Pressure30.24 inHg
Wind6.6 mph NW
Humidity43%
Visibility—
Dew point46°
Wed, 2869° / 49°0Partly cloudy
MorningPartly cloudy54°feels 52°
AfternoonPartly cloudy65°feels 63°
EveningPartly cloudy58°feels 56°
OvernightPartly cloudy53°feels 51°
69 °Partly cloudy

O'Fallon, Wednesday, 28 October

Partly cloudy. High 69°, low 49°.

Pressure30.18 inHg
Wind8.4 mph W
Humidity46%
Visibility—
Dew point42°
Thu, 2969° / 53°0.01Light rain
MorningLight rain57°feels 56°
AfternoonLight rain67°feels 66°
EveningLight rain63°feels 62°
OvernightLight rain60°feels 59°
69 °Light rain

O'Fallon, Thursday, 29 October

Light rain. High 69°, low 53°.

Pressure30.09 inHg
Wind8.2 mph S
Humidity49%
Visibility—
Dew point46°
Fri, 3074° / 58°0.29Light rain
MorningLight rain62°feels 61°
AfternoonLight rain69°feels 68°
EveningLight rain63°feels 64°
OvernightLight rain62°feels 62°
74 °Light rain

O'Fallon, Friday, 30 October

Light rain. High 74°, low 58°.

Pressure29.88 inHg
Wind9.9 mph S
Humidity55%
Visibility—
Dew point51°
Sat, 3163° / 60°0.37Rain
MorningRain61°feels 61°
AfternoonRain62°feels 62°
EveningRain60°feels 60°
OvernightRain60°feels 60°
63 °Rain

O'Fallon, Saturday, 31 October

Rain. High 63°, low 60°.

Pressure29.77 inHg
Wind14.7 mph S
Humidity90%
Visibility—
Dew point59°

About this forecast

How reliable is a 10-day forecast?

The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.

What does the time-of-day table show?

Temperature in O'Fallon, MO around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.

How is the best day chosen?

We weigh the daytime high against precipitation: a warm, dry day scores highest.