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As of 15:37 CDT

Weather in O'Fallon, IL

75°Current weather

O'Fallon, Saturday, 24 October, 15:37

Mostly clear. Feels like 74°. High 75°, low 47°.

Pressure30.30 inHg
Wind0 mph N
Humidity38%
Visibility6.2 mi
Dew point48°

Two-week outlook for O'Fallon, IL: week one averages a high of 75.6° and week two 63.6°, so week two runs 12° cooler than week one. Around 0.3 inches of precipitation are expected over the 14 days, across 2 wet days. The nearest weekend, October 24: 75°, dry.

Week one vs week two

WeekHighLowPrecipitationVs normal
1st (October 24 – October 30)75.6°52.7°0.0 in / 0 d—
2nd (October 31 – November 6)63.6°51.9°0.3 in / 2 d—

Weekend weather

Sat, October 24
Overcast
75°47°
no precip.
Sun, October 25
Overcast
76°48°
no precip.
Sat, October 31
Light rain
72°62°
0.03 in
Sun, November 1
Light rain
80°62°
0.13 in
Sun, 2576° / 48°0Overcast
76 °Overcast

O'Fallon, Sunday, 25 October

Overcast. High 76°, low 48°.

Pressure30.42 inHg
Wind2 mph S
Humidity53%
Visibility6.2 mi
Dew point52°
Mon, 2673° / 52°0Overcast
73 °Overcast

O'Fallon, Monday, 26 October

Overcast. High 73°, low 52°.

Pressure30.33 inHg
Wind3 mph SW
Humidity55%
Visibility6.2 mi
Dew point53°
Tue, 2772° / 55°0Overcast
72 °Overcast

O'Fallon, Tuesday, 27 October

Overcast. High 72°, low 55°.

Pressure30.24 inHg
Wind6.9 mph S
Humidity54%
Visibility6.2 mi
Dew point52°
Wed, 2876° / 54°0Clear
76 °Clear

O'Fallon, Wednesday, 28 October

Clear. High 76°, low 54°.

Pressure30.21 inHg
Wind6.7 mph S
Humidity52%
Visibility6.2 mi
Dew point52°
Thu, 2978° / 57°0Overcast
78 °Overcast

O'Fallon, Thursday, 29 October

Overcast. High 78°, low 57°.

Pressure30.18 inHg
Wind7.3 mph S
Humidity46%
Visibility—
Dew point52°
Fri, 3078° / 57°0Partly cloudy
78 °Partly cloudy

O'Fallon, Friday, 30 October

Partly cloudy. High 78°, low 57°.

Pressure30.15 inHg
Wind11.1 mph S
Humidity34%
Visibility—
Dew point44°
Sat, 3172° / 62°0.03Light rain
72 °Light rain

O'Fallon, Saturday, 31 October

Light rain. High 72°, low 62°.

Pressure30.03 inHg
Wind14.7 mph S
Humidity37%
Visibility—
Dew point42°
Sun, 0180° / 62°0.13Light rain
80 °Light rain

O'Fallon, Sunday, 1 November

Light rain. High 80°, low 62°.

Pressure29.77 inHg
Wind17.2 mph S
Humidity52%
Visibility—
Dew point56°
Mon, 0254° / 44°0.11Light rain
54 °Light rain

O'Fallon, Monday, 2 November

Light rain. High 54°, low 44°.

Pressure29.74 inHg
Wind23.5 mph NW
Humidity56%
Visibility—
Dew point33°
Tue, 0354° / 51°0Light rain
54 °Light rain

O'Fallon, Tuesday, 3 November

Light rain. High 54°, low 51°.

Pressure29.65 inHg
Wind19.8 mph NW
Humidity82%
Visibility—
Dew point48°
Wed, 0457° / 49°0.01Light rain
57 °Light rain

O'Fallon, Wednesday, 4 November

Light rain. High 57°, low 49°.

Pressure29.74 inHg
Wind12 mph NW
Humidity65%
Visibility—
Dew point43°
Thu, 0563° / 45°0Partly cloudy
63 °Partly cloudy

O'Fallon, Thursday, 5 November

Partly cloudy. High 63°, low 45°.

Pressure30.00 inHg
Wind3.7 mph NW
Humidity51%
Visibility—
Dew point41°
Fri, 0665° / 51°0Overcast
65 °Overcast

O'Fallon, Friday, 6 November

Overcast. High 65°, low 51°.

Pressure30.15 inHg
Wind6.8 mph N
Humidity51%
Visibility—
Dew point43°

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.