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As of 00:22 CST

Weather in O'Fallon, IL

47°Current weather

O'Fallon, Thursday, 5 November, 00:22

Clear. Feels like 45°. High 63°, low 47°.

Pressure29.83 inHg
Wind5.7 mph S
Humidity96%
Visibility6.2 mi
Dew point47°

10-day forecast for O'Fallon, IL: 36° to 67°, with precipitation expected on 0 days. The table below breaks each day into morning, afternoon, evening and overnight.

67°
Best day: Saturday, November 14
52°
Worst day: Saturday, November 7

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

Fri, 0656° / 43°0Overcast
MorningOvercast52°feels 50°
AfternoonOvercast54°feels 52°
EveningOvercast49°feels 48°
OvernightOvercast52°feels 51°
56 °Overcast

O'Fallon, Friday, 6 November

Overcast. High 56°, low 43°.

Pressure30.15 inHg
Wind9.2 mph N
Humidity59%
Visibility6.2 mi
Dew point41°
Sat, 0752° / 37°0Overcast
MorningClear41°feels 39°
AfternoonOvercast52°feels 49°
EveningClear44°feels 44°
OvernightClear39°feels 37°
52 °Overcast

O'Fallon, Saturday, 7 November

Overcast. High 52°, low 37°.

Pressure30.30 inHg
Wind3.4 mph NW
Humidity52%
Visibility6.2 mi
Dew point34°
Sun, 0862° / 39°0Clear
MorningPartly cloudy44°feels 41°
AfternoonClear61°feels 59°
EveningClear52°feels 51°
OvernightClear40°feels 37°
62 °Clear

O'Fallon, Sunday, 8 November

Clear. High 62°, low 39°.

Pressure30.18 inHg
Wind6.4 mph SW
Humidity60%
Visibility6.2 mi
Dew point45°
Mon, 0966° / 44°0Clear
MorningClear50°feels 49°
AfternoonClear62°feels 62°
EveningClear56°feels 55°
OvernightClear52°feels 51°
66 °Clear

O'Fallon, Monday, 9 November

Clear. High 66°, low 44°.

Pressure30.18 inHg
Wind5.5 mph S
Humidity67%
Visibility—
Dew point50°
Tue, 1063° / 45°0Clear
MorningClear50°feels 47°
AfternoonClear60°feels 58°
EveningClear53°feels 51°
OvernightClear50°feels 47°
63 °Clear

O'Fallon, Tuesday, 10 November

Clear. High 63°, low 45°.

Pressure30.09 inHg
Wind6.2 mph SW
Humidity54%
Visibility—
Dew point43°
Wed, 1160° / 44°0Mostly clear
MorningMostly clear49°feels 46°
AfternoonMostly clear58°feels 55°
EveningMostly clear49°feels 46°
OvernightMostly clear45°feels 41°
60 °Mostly clear

O'Fallon, Wednesday, 11 November

Mostly clear. High 60°, low 44°.

Pressure30.18 inHg
Wind8.2 mph N
Humidity30%
Visibility—
Dew point26°
Thu, 1253° / 37°0Clear
MorningClear41°feels 37°
AfternoonClear51°feels 48°
EveningClear44°feels 39°
OvernightClear40°feels 35°
53 °Clear

O'Fallon, Thursday, 12 November

Clear. High 53°, low 37°.

Pressure30.21 inHg
Wind11.9 mph N
Humidity42%
Visibility—
Dew point28°
Fri, 1358° / 36°0Partly cloudy
MorningPartly cloudy41°feels 38°
AfternoonPartly cloudy54°feels 51°
EveningPartly cloudy48°feels 46°
OvernightPartly cloudy44°feels 41°
58 °Partly cloudy

O'Fallon, Friday, 13 November

Partly cloudy. High 58°, low 36°.

Pressure30.12 inHg
Wind7.1 mph W
Humidity37%
Visibility—
Dew point27°
Sat, 1467° / 42°0Clear
MorningClear48°feels 44°
AfternoonClear62°feels 60°
EveningClear56°feels 54°
OvernightClear50°feels 48°
67 °Clear

O'Fallon, Saturday, 14 November

Clear. High 67°, low 42°.

Pressure30.00 inHg
Wind9.5 mph SW
Humidity41%
Visibility—
Dew point37°

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.