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As of 00:32 CDT

Weather in O'Fallon, IL

56°Current weather

O'Fallon, Monday, 26 October, 00:32

Clear. Feels like 56°. High 77°, low 53°.

Pressure30.33 inHg
Wind0 mph N
Humidity85%
Visibility6.2 mi
Dew point52°

10-day forecast for O'Fallon, IL: 49° to 79°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.

79°
Best day: Thursday, October 29
62° · 0.51 in
Worst day: Sunday, November 1

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

Tue, 2774° / 51°0Overcast
MorningOvercast54°feels 53°
AfternoonOvercast71°feels 70°
EveningOvercast63°feels 62°
OvernightOvercast55°feels 54°
74 °Overcast

O'Fallon, Tuesday, 27 October

Overcast. High 74°, low 51°.

Pressure30.24 inHg
Wind4.6 mph S
Humidity55%
Visibility6.2 mi
Dew point51°
Wed, 2875° / 55°0Clear
MorningOvercast57°feels 56°
AfternoonClear75°feels 74°
EveningClear65°feels 64°
OvernightOvercast58°feels 57°
75 °Clear

O'Fallon, Wednesday, 28 October

Clear. High 75°, low 55°.

Pressure30.21 inHg
Wind6.5 mph S
Humidity48%
Visibility6.2 mi
Dew point51°
Thu, 2979° / 57°0Clear
MorningClear60°feels 59°
AfternoonClear78°feels 78°
EveningPartly cloudy69°feels 69°
OvernightClear59°feels 58°
79 °Clear

O'Fallon, Thursday, 29 October

Clear. High 79°, low 57°.

Pressure30.15 inHg
Wind5.6 mph SW
Humidity50%
Visibility6.2 mi
Dew point54°
Fri, 3077° / 58°0Overcast
MorningOvercast64°feels 63°
AfternoonOvercast76°feels 75°
EveningOvercast69°feels 69°
OvernightOvercast65°feels 65°
77 °Overcast

O'Fallon, Friday, 30 October

Overcast. High 77°, low 58°.

Pressure30.15 inHg
Wind6.4 mph SE
Humidity47%
Visibility—
Dew point53°
Sat, 3169° / 61°0Overcast
MorningOvercast63°feels 62°
AfternoonOvercast66°feels 65°
EveningOvercast64°feels 63°
OvernightOvercast63°feels 62°
69 °Overcast

O'Fallon, Saturday, 31 October

Overcast. High 69°, low 61°.

Pressure30.15 inHg
Wind10.6 mph E
Humidity62%
Visibility—
Dew point52°
Sun, 0162° / 58°0.51Rain
MorningRain61°feels 60°
AfternoonRain62°feels 61°
EveningRain58°feels 58°
OvernightRain58°feels 58°
62 °Rain

O'Fallon, Sunday, 1 November

Rain. High 62°, low 58°.

Pressure30.00 inHg
Wind14 mph NE
Humidity73%
Visibility—
Dew point53°
Mon, 0262° / 56°0.16Light rain
MorningLight rain58°feels 58°
AfternoonLight rain60°feels 59°
EveningLight rain58°feels 57°
OvernightLight rain56°feels 56°
62 °Light rain

O'Fallon, Monday, 2 November

Light rain. High 62°, low 56°.

Pressure29.85 inHg
Wind12.2 mph N
Humidity76%
Visibility—
Dew point52°
Tue, 0367° / 52°0Mostly clear
MorningMostly clear56°feels 54°
AfternoonMostly clear65°feels 63°
EveningMostly clear59°feels 58°
OvernightMostly clear56°feels 55°
67 °Mostly clear

O'Fallon, Tuesday, 3 November

Mostly clear. High 67°, low 52°.

Pressure30.09 inHg
Wind7.1 mph NW
Humidity42%
Visibility—
Dew point40°
Wed, 0462° / 49°0Overcast
MorningOvercast54°feels 53°
AfternoonOvercast60°feels 58°
EveningOvercast52°feels 49°
OvernightOvercast49°feels 46°
62 °Overcast

O'Fallon, Wednesday, 4 November

Overcast. High 62°, low 49°.

Pressure30.24 inHg
Wind12.3 mph N
Humidity33%
Visibility—
Dew point31°

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, IL 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.