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As of 18:03 CST

Weather in O'Fallon, IL

45°Current weather

O'Fallon, Thursday, 12 November, 18:03

Overcast. Feels like 39°. High 51°, low 42°.

Pressure30.00 inHg
Wind12.7 mph N
Humidity63%
Visibility6.2 mi
Dew point32°

Two-week outlook for O'Fallon, IL: week one averages a high of 52.4° and week two 61.9°, so week two runs 9.6° warmer than week one. Around 1.7 inches of precipitation are expected over the 14 days, across 2 wet days. The nearest weekend, November 14: 47°, dry.

Week one vs week two

WeekHighLowPrecipitationVs normal
1st (November 12 – November 18)52.4°34.5°0.0 in / 0 d—
2nd (November 19 – November 25)61.9°48.6°1.7 in / 2 d—

Weekend weather

Sat, November 14
Clear
47°31°
no precip.
Sun, November 15
Overcast
50°30°
no precip.
Sat, November 21
Overcast
70°49°
no precip.
Sun, November 22
Overcast
65°49°
no precip.
Fri, 1348° / 35°0Overcast
48 °Overcast

O'Fallon, Friday, 13 November

Overcast. High 48°, low 35°.

Pressure30.12 inHg
Wind11.9 mph N
Humidity63%
Visibility6.2 mi
Dew point25°
Sat, 1447° / 31°0Clear
47 °Clear

O'Fallon, Saturday, 14 November

Clear. High 47°, low 31°.

Pressure30.33 inHg
Wind3.2 mph NW
Humidity57%
Visibility6.2 mi
Dew point27°
Sun, 1550° / 30°0Overcast
50 °Overcast

O'Fallon, Sunday, 15 November

Overcast. High 50°, low 30°.

Pressure30.45 inHg
Wind1.1 mph N
Humidity51%
Visibility6.2 mi
Dew point29°
Mon, 1653° / 32°0Clear
53 °Clear

O'Fallon, Monday, 16 November

Clear. High 53°, low 32°.

Pressure30.50 inHg
Wind1.8 mph S
Humidity47%
Visibility6.2 mi
Dew point32°
Tue, 1755° / 34°0Clear
55 °Clear

O'Fallon, Tuesday, 17 November

Clear. High 55°, low 34°.

Pressure30.45 inHg
Wind6.2 mph SE
Humidity52%
Visibility—
Dew point33°
Wed, 1864° / 38°0Partly cloudy
64 °Partly cloudy

O'Fallon, Wednesday, 18 November

Partly cloudy. High 64°, low 38°.

Pressure30.30 inHg
Wind14.6 mph S
Humidity37%
Visibility—
Dew point32°
Thu, 1964° / 50°0Overcast
64 °Overcast

O'Fallon, Thursday, 19 November

Overcast. High 64°, low 50°.

Pressure30.27 inHg
Wind12.7 mph S
Humidity34%
Visibility—
Dew point31°
Fri, 2068° / 50°0Overcast
68 °Overcast

O'Fallon, Friday, 20 November

Overcast. High 68°, low 50°.

Pressure30.30 inHg
Wind10.3 mph S
Humidity36%
Visibility—
Dew point36°
Sat, 2170° / 49°0Overcast
70 °Overcast

O'Fallon, Saturday, 21 November

Overcast. High 70°, low 49°.

Pressure30.21 inHg
Wind13.3 mph S
Humidity47%
Visibility—
Dew point44°
Sun, 2265° / 49°0Overcast
65 °Overcast

O'Fallon, Sunday, 22 November

Overcast. High 65°, low 49°.

Pressure30.03 inHg
Wind16.1 mph SE
Humidity54%
Visibility—
Dew point46°
Mon, 2364° / 59°1.54Heavy rain
64 °Heavy rain

O'Fallon, Monday, 23 November

Heavy rain. High 64°, low 59°.

Pressure29.74 inHg
Wind22.5 mph S
Humidity89%
Visibility—
Dew point60°
Tue, 2458° / 45°0.17Rain
58 °Rain

O'Fallon, Tuesday, 24 November

Rain. High 58°, low 45°.

Pressure29.91 inHg
Wind15.5 mph W
Humidity52%
Visibility—
Dew point35°
Wed, 2544° / 38°0Overcast
44 °Overcast

O'Fallon, Wednesday, 25 November

Overcast. High 44°, low 38°.

Pressure30.33 inHg
Wind9.7 mph N
Humidity45%
Visibility—
Dew point23°

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.