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As of 19:25 CDT

Weather in O'Fallon, IL

64°Current weather

O'Fallon, Saturday, 31 October, 19:25

Overcast. Feels like 63°. High 68°, low 58°.

Pressure30.21 inHg
Wind3.4 mph E
Humidity70%
Visibility6.2 mi
Dew point53°

10-day forecast for O'Fallon, IL: 47° to 74°, with precipitation expected on 5 days. The table below breaks each day into morning, afternoon, evening and overnight.

68°
Best day: Saturday, October 31
66° · 0.71 in
Worst day: Wednesday, November 4

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

Sun, 0171° / 60°0.07Light rain
MorningLight rain63°feels 63°
AfternoonPartly cloudy71°feels 70°
EveningOvercast62°feels 61°
OvernightOvercast64°feels 64°
71 °Light rain

O'Fallon, Sunday, 1 November

Light rain. High 71°, low 60°.

Pressure30.27 inHg
Wind10.4 mph SE
Humidity68%
Visibility6.2 mi
Dew point55°
Mon, 0268° / 58°0.01Light rain
MorningOvercast58°feels 58°
AfternoonOvercast67°feels 67°
EveningOvercast67°feels 67°
OvernightOvercast60°feels 60°
68 °Light rain

O'Fallon, Monday, 2 November

Light rain. High 68°, low 58°.

Pressure30.06 inHg
Wind10.3 mph S
Humidity87%
Visibility6.2 mi
Dew point60°
Tue, 0374° / 67°0.69Heavy rain
MorningOvercast67°feels 67°
AfternoonLight rain74°feels 75°
EveningRain67°feels 67°
OvernightOvercast67°feels 67°
74 °Heavy rain

O'Fallon, Tuesday, 3 November

Heavy rain. High 74°, low 67°.

Pressure29.85 inHg
Wind20.2 mph S
Humidity77%
Visibility6.2 mi
Dew point63°
Wed, 0466° / 60°0.71Heavy rain
MorningOvercast60°feels 60°
AfternoonOvercast65°feels 64°
EveningHeavy rain61°feels 60°
OvernightRain65°feels 65°
66 °Heavy rain

O'Fallon, Wednesday, 4 November

Heavy rain. High 66°, low 60°.

Pressure29.74 inHg
Wind9.3 mph SW
Humidity64%
Visibility6.2 mi
Dew point51°
Thu, 0567° / 55°0.11Light rain
MorningLight rain58°feels 56°
AfternoonLight rain64°feels 63°
EveningLight rain59°feels 58°
OvernightLight rain56°feels 56°
67 °Light rain

O'Fallon, Thursday, 5 November

Light rain. High 67°, low 55°.

Pressure29.77 inHg
Wind9.6 mph SW
Humidity53%
Visibility—
Dew point46°
Fri, 0660° / 52°0.04Light rain
MorningLight rain54°feels 54°
AfternoonLight rain59°feels 58°
EveningLight rain55°feels 54°
OvernightLight rain54°feels 53°
60 °Light rain

O'Fallon, Friday, 6 November

Light rain. High 60°, low 52°.

Pressure29.88 inHg
Wind8.6 mph NW
Humidity67%
Visibility—
Dew point48°
Sat, 0759° / 51°0Overcast
MorningOvercast54°feels 53°
AfternoonOvercast57°feels 55°
EveningOvercast53°feels 51°
OvernightOvercast52°feels 50°
59 °Overcast

O'Fallon, Saturday, 7 November

Overcast. High 59°, low 51°.

Pressure29.80 inHg
Wind5.7 mph SE
Humidity57%
Visibility—
Dew point42°
Sun, 0861° / 51°0Overcast
MorningOvercast55°feels 53°
AfternoonOvercast60°feels 58°
EveningOvercast54°feels 52°
OvernightOvercast53°feels 51°
61 °Overcast

O'Fallon, Sunday, 8 November

Overcast. High 61°, low 51°.

Pressure29.83 inHg
Wind15.3 mph NW
Humidity43%
Visibility—
Dew point37°
Mon, 0961° / 47°0Overcast
MorningOvercast49°feels 46°
AfternoonOvercast55°feels 53°
EveningOvercast52°feels 49°
OvernightOvercast48°feels 46°
61 °Overcast

O'Fallon, Monday, 9 November

Overcast. High 61°, low 47°.

Pressure29.97 inHg
Wind10.8 mph NW
Humidity50%
Visibility—
Dew point36°

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.