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As of 02:17 CDT

Weather in O'Fallon, MO

55°Current weather

O'Fallon, Friday, 23 October, 02:17

Clear. Feels like 54°. High 76°, low 50°.

Pressure30.21 inHg
Wind1.8 mph SE
Humidity78%
Visibility6.2 mi
Dew point48°

10-day forecast for O'Fallon, MO: 48° to 78°, with precipitation expected on 1 day. The table below breaks each day into morning, afternoon, evening and overnight.

78°
Best day: Thursday, October 29
64° · 0.3 in
Worst day: Saturday, October 31

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

Sat, 2474° / 48°0Overcast
MorningClear50°feels 49°
AfternoonMostly clear72°feels 71°
EveningOvercast61°feels 60°
OvernightPartly cloudy54°feels 52°
74 °Overcast

O'Fallon, Saturday, 24 October

Overcast. High 74°, low 48°.

Pressure30.33 inHg
Wind5 mph SE
Humidity53%
Visibility6.2 mi
Dew point50°
Sun, 2575° / 51°0Partly cloudy
MorningOvercast52°feels 51°
AfternoonOvercast75°feels 74°
EveningOvercast62°feels 62°
OvernightMostly clear55°feels 54°
75 °Partly cloudy

O'Fallon, Sunday, 25 October

Partly cloudy. High 75°, low 51°.

Pressure30.39 inHg
Wind2.7 mph S
Humidity54%
Visibility6.2 mi
Dew point53°
Mon, 2674° / 55°0Overcast
MorningOvercast57°feels 57°
AfternoonOvercast72°feels 72°
EveningMostly clear62°feels 61°
OvernightOvercast57°feels 56°
74 °Overcast

O'Fallon, Monday, 26 October

Overcast. High 74°, low 55°.

Pressure30.33 inHg
Wind1.1 mph S
Humidity55%
Visibility6.2 mi
Dew point52°
Tue, 2771° / 52°0Overcast
MorningOvercast57°feels 56°
AfternoonOvercast69°feels 68°
EveningOvercast63°feels 62°
OvernightOvercast55°feels 54°
71 °Overcast

O'Fallon, Tuesday, 27 October

Overcast. High 71°, low 52°.

Pressure30.27 inHg
Wind5.6 mph SE
Humidity51%
Visibility—
Dew point48°
Wed, 2877° / 55°0Mostly clear
MorningMostly clear60°feels 59°
AfternoonMostly clear73°feels 71°
EveningMostly clear65°feels 64°
OvernightMostly clear61°feels 60°
77 °Mostly clear

O'Fallon, Wednesday, 28 October

Mostly clear. High 77°, low 55°.

Pressure30.09 inHg
Wind10.2 mph S
Humidity39%
Visibility—
Dew point45°
Thu, 2978° / 60°0Overcast
MorningOvercast65°feels 63°
AfternoonOvercast77°feels 75°
EveningOvercast69°feels 67°
OvernightOvercast67°feels 65°
78 °Overcast

O'Fallon, Thursday, 29 October

Overcast. High 78°, low 60°.

Pressure30.12 inHg
Wind11.4 mph S
Humidity26%
Visibility—
Dew point38°
Fri, 3073° / 59°0Light rain
MorningLight rain65°feels 64°
AfternoonLight rain72°feels 71°
EveningLight rain65°feels 64°
OvernightLight rain60°feels 59°
73 °Light rain

O'Fallon, Friday, 30 October

Light rain. High 73°, low 59°.

Pressure30.06 inHg
Wind8.9 mph SW
Humidity35%
Visibility—
Dew point42°
Sat, 3164° / 59°0.3Light rain
MorningLight rain59°feels 59°
AfternoonLight rain62°feels 62°
EveningLight rain64°feels 64°
OvernightLight rain63°feels 63°
64 °Light rain

O'Fallon, Saturday, 31 October

Light rain. High 64°, low 59°.

Pressure29.91 inHg
Wind14.2 mph S
Humidity90%
Visibility—
Dew point58°
Sun, 0167° / 61°0.03Light rain
MorningLight rain63°feels 63°
AfternoonLight rain66°feels 66°
EveningLight rain62°feels 62°
OvernightLight rain62°feels 62°
67 °Light rain

O'Fallon, Sunday, 1 November

Light rain. High 67°, low 61°.

Pressure29.97 inHg
Wind10.1 mph S
Humidity80%
Visibility—
Dew point60°

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.