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As of 15:37 CDT

Weather in O'Fallon, IL

75°Current weather

O'Fallon, Saturday, 24 October, 15:37

Mostly clear. Feels like 74°. High 75°, low 47°.

Pressure30.30 inHg
Wind0 mph N
Humidity38%
Visibility6.2 mi
Dew point48°

10-day forecast for O'Fallon, IL: 44° to 80°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.

78°
Best day: Friday, October 30
54° · 0.11 in
Worst day: Monday, November 2

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

Sun, 2576° / 48°0Overcast
MorningOvercast51°feels 50°
AfternoonOvercast75°feels 75°
EveningOvercast59°feels 58°
OvernightPartly cloudy52°feels 50°
76 °Overcast

O'Fallon, Sunday, 25 October

Overcast. High 76°, low 48°.

Pressure30.42 inHg
Wind2 mph S
Humidity53%
Visibility6.2 mi
Dew point52°
Mon, 2673° / 52°0Overcast
MorningOvercast56°feels 55°
AfternoonOvercast73°feels 72°
EveningClear62°feels 61°
OvernightOvercast54°feels 53°
73 °Overcast

O'Fallon, Monday, 26 October

Overcast. High 73°, low 52°.

Pressure30.33 inHg
Wind3 mph SW
Humidity55%
Visibility6.2 mi
Dew point53°
Tue, 2772° / 55°0Overcast
MorningOvercast55°feels 54°
AfternoonOvercast72°feels 71°
EveningOvercast63°feels 62°
OvernightOvercast56°feels 56°
72 °Overcast

O'Fallon, Tuesday, 27 October

Overcast. High 72°, low 55°.

Pressure30.24 inHg
Wind6.9 mph S
Humidity54%
Visibility6.2 mi
Dew point52°
Wed, 2876° / 54°0Clear
MorningClear58°feels 57°
AfternoonClear75°feels 75°
EveningClear67°feels 66°
OvernightMostly clear57°feels 56°
76 °Clear

O'Fallon, Wednesday, 28 October

Clear. High 76°, low 54°.

Pressure30.21 inHg
Wind6.7 mph S
Humidity52%
Visibility6.2 mi
Dew point52°
Thu, 2978° / 57°0Overcast
MorningOvercast63°feels 62°
AfternoonOvercast76°feels 75°
EveningOvercast68°feels 68°
OvernightOvercast64°feels 63°
78 °Overcast

O'Fallon, Thursday, 29 October

Overcast. High 78°, low 57°.

Pressure30.18 inHg
Wind7.3 mph S
Humidity46%
Visibility—
Dew point52°
Fri, 3078° / 57°0Partly cloudy
MorningPartly cloudy62°feels 62°
AfternoonPartly cloudy75°feels 74°
EveningPartly cloudy67°feels 65°
OvernightPartly cloudy65°feels 64°
78 °Partly cloudy

O'Fallon, Friday, 30 October

Partly cloudy. High 78°, low 57°.

Pressure30.15 inHg
Wind11.1 mph S
Humidity34%
Visibility—
Dew point44°
Sat, 3172° / 62°0.03Light rain
MorningLight rain65°feels 63°
AfternoonLight rain71°feels 69°
EveningLight rain70°feels 69°
OvernightLight rain64°feels 63°
72 °Light rain

O'Fallon, Saturday, 31 October

Light rain. High 72°, low 62°.

Pressure30.03 inHg
Wind14.7 mph S
Humidity37%
Visibility—
Dew point42°
Sun, 0180° / 62°0.13Light rain
MorningLight rain67°feels 66°
AfternoonLight rain75°feels 75°
EveningLight rain67°feels 67°
OvernightLight rain62°feels 61°
80 °Light rain

O'Fallon, Sunday, 1 November

Light rain. High 80°, low 62°.

Pressure29.77 inHg
Wind17.2 mph S
Humidity52%
Visibility—
Dew point56°
Mon, 0254° / 44°0.11Light rain
MorningLight rain47°feels 40°
AfternoonLight rain48°feels 41°
EveningLight rain48°feels 41°
OvernightLight rain49°feels 42°
54 °Light rain

O'Fallon, Monday, 2 November

Light rain. High 54°, low 44°.

Pressure29.74 inHg
Wind23.5 mph NW
Humidity56%
Visibility—
Dew point33°

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.