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As of 01:58 CDT

Weather in O'Fallon, IL

51°Current weather

O'Fallon, Saturday, 24 October, 01:58

Clear. Feels like 50°. High 75°, low 47°.

Pressure30.30 inHg
Wind0 mph N
Humidity85%
Visibility6.2 mi
Dew point46°

10-day forecast for O'Fallon, IL: 45° to 78°, with precipitation expected on 1 day. The table below breaks each day into morning, afternoon, evening and overnight.

78°
Best day: Friday, October 30
67° · 0.14 in
Worst day: Sunday, November 1

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

Sun, 2576° / 47°0Overcast
MorningClear51°feels 50°
AfternoonOvercast74°feels 73°
EveningOvercast64°feels 63°
OvernightMostly clear51°feels 50°
76 °Overcast

O'Fallon, Sunday, 25 October

Overcast. High 76°, low 47°.

Pressure30.39 inHg
Wind2.2 mph S
Humidity51%
Visibility6.2 mi
Dew point52°
Mon, 2674° / 55°0Overcast
MorningOvercast56°feels 55°
AfternoonOvercast74°feels 73°
EveningPartly cloudy62°feels 62°
OvernightOvercast57°feels 56°
74 °Overcast

O'Fallon, Monday, 26 October

Overcast. High 74°, low 55°.

Pressure30.33 inHg
Wind3 mph SW
Humidity51%
Visibility6.2 mi
Dew point52°
Tue, 2772° / 53°0Overcast
MorningOvercast56°feels 55°
AfternoonOvercast71°feels 70°
EveningOvercast63°feels 62°
OvernightOvercast56°feels 55°
72 °Overcast

O'Fallon, Tuesday, 27 October

Overcast. High 72°, low 53°.

Pressure30.24 inHg
Wind3.8 mph S
Humidity57%
Visibility6.2 mi
Dew point51°
Wed, 2876° / 54°0.02Light rain
MorningLight rain60°feels 59°
AfternoonLight rain73°feels 72°
EveningLight rain66°feels 65°
OvernightLight rain62°feels 61°
76 °Light rain

O'Fallon, Wednesday, 28 October

Light rain. High 76°, low 54°.

Pressure30.21 inHg
Wind7.7 mph S
Humidity44%
Visibility—
Dew point48°
Thu, 2978° / 55°0Mostly clear
MorningMostly clear61°feels 60°
AfternoonMostly clear74°feels 73°
EveningMostly clear66°feels 65°
OvernightMostly clear62°feels 60°
78 °Mostly clear

O'Fallon, Thursday, 29 October

Mostly clear. High 78°, low 55°.

Pressure30.24 inHg
Wind7.7 mph S
Humidity35%
Visibility—
Dew point44°
Fri, 3078° / 60°0Overcast
MorningOvercast64°feels 62°
AfternoonOvercast74°feels 73°
EveningOvercast67°feels 66°
OvernightOvercast64°feels 62°
78 °Overcast

O'Fallon, Friday, 30 October

Overcast. High 78°, low 60°.

Pressure30.18 inHg
Wind7.4 mph S
Humidity29%
Visibility—
Dew point39°
Sat, 3165° / 61°0.03Light rain
MorningLight rain63°feels 62°
AfternoonLight rain64°feels 62°
EveningLight rain62°feels 61°
OvernightLight rain62°feels 61°
65 °Light rain

O'Fallon, Saturday, 31 October

Light rain. High 65°, low 61°.

Pressure30.12 inHg
Wind12.8 mph S
Humidity43%
Visibility—
Dew point41°
Sun, 0167° / 57°0.14Light rain
MorningLight rain61°feels 60°
AfternoonLight rain62°feels 61°
EveningLight rain59°feels 57°
OvernightLight rain57°feels 55°
67 °Light rain

O'Fallon, Sunday, 1 November

Light rain. High 67°, low 57°.

Pressure30.00 inHg
Wind13.5 mph S
Humidity84%
Visibility—
Dew point57°
Mon, 0262° / 45°0Partly cloudy
MorningPartly cloudy49°feels 46°
AfternoonPartly cloudy59°feels 56°
EveningPartly cloudy52°feels 49°
OvernightPartly cloudy49°feels 46°
62 °Partly cloudy

O'Fallon, Monday, 2 November

Partly cloudy. High 62°, low 45°.

Pressure30.18 inHg
Wind12.9 mph NW
Humidity28%
Visibility—
Dew point26°

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.