EN
English Español

As of 12:26 CDT

Weather in O'Fallon, IL

72°Current weather

O'Fallon, Monday, 26 October, 12:26

Clear. Feels like 71°. High 74°, low 51°.

Pressure30.33 inHg
Wind6.9 mph W
Humidity49%
Visibility6.2 mi
Dew point52°

Two-week outlook for O'Fallon, IL: week one averages a high of 74° and week two 66.3°, so week two runs 7.7° cooler than week one. Around 0.5 inches of precipitation are expected over the 14 days, across 5 wet days. The nearest weekend, October 31: 72°, with precipitation.

Week one vs week two

WeekHighLowPrecipitationVs normal
1st (October 26 – November 1)74°55.7°0.2 in / 2 d—
2nd (November 2 – November 8)66.3°50.3°0.3 in / 3 d—

Weekend weather

Sat, October 31
Light rain
72°60°
0.07 in
Sun, November 1
Light rain
65°59°
0.1 in
Sat, November 7
Clear
56°43°
no precip.
Sun, November 8
Mostly clear
60°39°
no precip.
Tue, 2774° / 51°0Overcast
74 °Overcast

O'Fallon, Tuesday, 27 October

Overcast. High 74°, low 51°.

Pressure30.24 inHg
Wind5.3 mph S
Humidity55%
Visibility6.2 mi
Dew point52°
Wed, 2875° / 53°0Clear
75 °Clear

O'Fallon, Wednesday, 28 October

Clear. High 75°, low 53°.

Pressure30.21 inHg
Wind5.8 mph S
Humidity51%
Visibility6.2 mi
Dew point53°
Thu, 2979° / 57°0Clear
79 °Clear

O'Fallon, Thursday, 29 October

Clear. High 79°, low 57°.

Pressure30.15 inHg
Wind5.3 mph SW
Humidity55%
Visibility6.2 mi
Dew point57°
Fri, 3079° / 58°0Overcast
79 °Overcast

O'Fallon, Friday, 30 October

Overcast. High 79°, low 58°.

Pressure30.18 inHg
Wind2.8 mph S
Humidity60%
Visibility6.2 mi
Dew point58°
Sat, 3172° / 60°0.07Light rain
72 °Light rain

O'Fallon, Saturday, 31 October

Light rain. High 72°, low 60°.

Pressure30.15 inHg
Wind4.3 mph S
Humidity54%
Visibility—
Dew point53°
Sun, 0165° / 59°0.1Light rain
65 °Light rain

O'Fallon, Sunday, 1 November

Light rain. High 65°, low 59°.

Pressure30.00 inHg
Wind7.3 mph N
Humidity87%
Visibility—
Dew point61°
Mon, 0272° / 59°0.03Light rain
72 °Light rain

O'Fallon, Monday, 2 November

Light rain. High 72°, low 59°.

Pressure29.88 inHg
Wind10.4 mph S
Humidity73%
Visibility—
Dew point58°
Tue, 0365° / 53°0.1Light rain
65 °Light rain

O'Fallon, Tuesday, 3 November

Light rain. High 65°, low 53°.

Pressure29.85 inHg
Wind19.9 mph W
Humidity36%
Visibility—
Dew point34°
Wed, 0464° / 46°0Overcast
64 °Overcast

O'Fallon, Wednesday, 4 November

Overcast. High 64°, low 46°.

Pressure30.00 inHg
Wind15.5 mph W
Humidity22%
Visibility—
Dew point20°
Thu, 0576° / 56°0.04Light rain
76 °Light rain

O'Fallon, Thursday, 5 November

Light rain. High 76°, low 56°.

Pressure29.83 inHg
Wind11.4 mph SW
Humidity37%
Visibility—
Dew point42°
Fri, 0671° / 56°0.15Rain
71 °Rain

O'Fallon, Friday, 6 November

Rain. High 71°, low 56°.

Pressure29.68 inHg
Wind17.6 mph NW
Humidity52%
Visibility—
Dew point49°
Sat, 0756° / 43°0Clear
56 °Clear

O'Fallon, Saturday, 7 November

Clear. High 56°, low 43°.

Pressure29.85 inHg
Wind14.1 mph NW
Humidity34%
Visibility—
Dew point25°
Sun, 0860° / 39°0Mostly clear
60 °Mostly clear

O'Fallon, Sunday, 8 November

Mostly clear. High 60°, low 39°.

Pressure30.09 inHg
Wind6.8 mph SE
Humidity45%
Visibility—
Dew point34°

About this forecast

Can I plan a trip on a 2-week forecast?

Week one is solid for planning — accuracy is high. Week two shows the trend: go by the averages and the comparison with normal, and check the details closer to the date.

What does the "Vs normal" column mean?

It is the gap between the forecast and the climate normal for those same dates in O'Fallon, IL, computed over 60 years. A positive value means the week runs warmer than usual.

Why are weekends shown separately?

Saturday and Sunday plans are what people check most, so we give them their own cards with temperature and precipitation.