EN
English Español

As of 08:22 CST

Weather in O'Fallon, IL

38°Current weather

O'Fallon, Friday, 13 November, 08:22

Overcast. Feels like 30°. High 45°, low 36°.

Pressure30.09 inHg
Wind12.7 mph NW
Humidity68%
Visibility6.2 mi
Dew point30°

10-day forecast for O'Fallon, IL: 30° to 69°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.

69°
Best day: Saturday, November 21
60° · 0.11 in
Worst day: Sunday, November 22

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

Sat, 1447° / 33°0Clear
MorningClear37°feels 35°
AfternoonClear46°feels 46°
EveningClear42°feels 42°
OvernightClear33°feels 29°
47 °Clear

O'Fallon, Saturday, 14 November

Clear. High 47°, low 33°.

Pressure30.33 inHg
Wind4 mph NW
Humidity58%
Visibility6.2 mi
Dew point26°
Sun, 1550° / 30°0Overcast
MorningOvercast35°feels 32°
AfternoonOvercast50°feels 47°
EveningClear39°feels 39°
OvernightClear32°feels 32°
50 °Overcast

O'Fallon, Sunday, 15 November

Overcast. High 50°, low 30°.

Pressure30.47 inHg
Wind0.5 mph NE
Humidity51%
Visibility6.2 mi
Dew point30°
Mon, 1653° / 32°0Clear
MorningClear36°feels 34°
AfternoonClear53°feels 51°
EveningClear41°feels 39°
OvernightClear33°feels 30°
53 °Clear

O'Fallon, Monday, 16 November

Clear. High 53°, low 32°.

Pressure30.53 inHg
Wind2.1 mph S
Humidity48%
Visibility6.2 mi
Dew point33°
Tue, 1755° / 35°0Mostly clear
MorningClear40°feels 38°
AfternoonMostly clear52°feels 49°
EveningMostly clear45°feels 42°
OvernightClear38°feels 34°
55 °Mostly clear

O'Fallon, Tuesday, 17 November

Mostly clear. High 55°, low 35°.

Pressure30.50 inHg
Wind6.4 mph SE
Humidity51%
Visibility—
Dew point33°
Wed, 1860° / 38°0Overcast
MorningOvercast44°feels 40°
AfternoonOvercast57°feels 55°
EveningOvercast53°feels 51°
OvernightOvercast48°feels 45°
60 °Overcast

O'Fallon, Wednesday, 18 November

Overcast. High 60°, low 38°.

Pressure30.36 inHg
Wind10.2 mph S
Humidity51%
Visibility—
Dew point37°
Thu, 1958° / 48°0.04Light rain
MorningLight rain52°feels 48°
AfternoonLight rain57°feels 56°
EveningLight rain52°feels 51°
OvernightLight rain53°feels 52°
58 °Light rain

O'Fallon, Thursday, 19 November

Light rain. High 58°, low 48°.

Pressure30.27 inHg
Wind9.9 mph S
Humidity65%
Visibility—
Dew point45°
Fri, 2065° / 53°0Overcast
MorningOvercast58°feels 57°
AfternoonOvercast61°feels 60°
EveningOvercast56°feels 55°
OvernightOvercast54°feels 53°
65 °Overcast

O'Fallon, Friday, 20 November

Overcast. High 65°, low 53°.

Pressure30.33 inHg
Wind9 mph SE
Humidity69%
Visibility—
Dew point51°
Sat, 2169° / 52°0Mostly clear
MorningMostly clear57°feels 56°
AfternoonMostly clear69°feels 67°
EveningMostly clear65°feels 64°
OvernightMostly clear63°feels 62°
69 °Mostly clear

O'Fallon, Saturday, 21 November

Mostly clear. High 69°, low 52°.

Pressure29.85 inHg
Wind22.9 mph S
Humidity33%
Visibility—
Dew point37°
Sun, 2260° / 41°0.11Light rain
MorningLight rain48°feels 44°
AfternoonLight rain51°feels 47°
EveningLight rain44°feels 41°
OvernightLight rain42°feels 38°
60 °Light rain

O'Fallon, Sunday, 22 November

Light rain. High 60°, low 41°.

Pressure30.12 inHg
Wind12.4 mph W
Humidity47%
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.