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As of 08:12 CDT

Weather in O'Fallon, IL

50°Current weather

O'Fallon, Friday, 23 October, 08:12

Clear. Feels like 49°. High 75°, low 49°.

Pressure30.27 inHg
Wind4 mph SE
Humidity92%
Visibility6.2 mi
Dew point48°

Two-week outlook for O'Fallon, IL: week one averages a high of 75° and week two 59.6°, so week two runs 15.4° cooler than week one. Around 0.8 inches of precipitation are expected over the 14 days, across 2 wet days. The nearest weekend, October 24: 74°, dry.

Week one vs week two

WeekHighLowPrecipitationVs normal
1st (October 23 – October 29)75°52.7°0.0 in / 0 d—
2nd (October 30 – November 5)59.6°47.4°0.8 in / 2 d—

Weekend weather

Sat, October 24
Overcast
74°48°
no precip.
Sun, October 25
Overcast
75°49°
no precip.
Sat, October 31
Rain
62°59°
0.69 in
Sun, November 1
Light rain
57°48°
0.01 in
Sat, 2474° / 48°0Overcast
74 °Overcast

O'Fallon, Saturday, 24 October

Overcast. High 74°, low 48°.

Pressure30.36 inHg
Wind3.7 mph SE
Humidity49%
Visibility6.2 mi
Dew point48°
Sun, 2575° / 49°0Overcast
75 °Overcast

O'Fallon, Sunday, 25 October

Overcast. High 75°, low 49°.

Pressure30.42 inHg
Wind3 mph S
Humidity55%
Visibility6.2 mi
Dew point54°
Mon, 2675° / 55°0Overcast
75 °Overcast

O'Fallon, Monday, 26 October

Overcast. High 75°, low 55°.

Pressure30.33 inHg
Wind2.3 mph SW
Humidity47%
Visibility6.2 mi
Dew point50°
Tue, 2773° / 53°0Overcast
73 °Overcast

O'Fallon, Tuesday, 27 October

Overcast. High 73°, low 53°.

Pressure30.24 inHg
Wind5 mph S
Humidity43%
Visibility—
Dew point46°
Wed, 2876° / 58°0Clear
76 °Clear

O'Fallon, Wednesday, 28 October

Clear. High 76°, low 58°.

Pressure30.06 inHg
Wind10 mph SW
Humidity36%
Visibility—
Dew point44°
Thu, 2977° / 56°0Overcast
77 °Overcast

O'Fallon, Thursday, 29 October

Overcast. High 77°, low 56°.

Pressure30.12 inHg
Wind15 mph S
Humidity28%
Visibility—
Dew point38°
Fri, 3065° / 60°0.12Light rain
65 °Light rain

O'Fallon, Friday, 30 October

Light rain. High 65°, low 60°.

Pressure30.06 inHg
Wind11.9 mph S
Humidity48%
Visibility—
Dew point44°
Sat, 3162° / 59°0.69Rain
62 °Rain

O'Fallon, Saturday, 31 October

Rain. High 62°, low 59°.

Pressure29.91 inHg
Wind9.8 mph S
Humidity98%
Visibility—
Dew point60°
Sun, 0157° / 48°0.01Light rain
57 °Light rain

O'Fallon, Sunday, 1 November

Light rain. High 57°, low 48°.

Pressure30.06 inHg
Wind14 mph W
Humidity67%
Visibility—
Dew point44°
Mon, 0253° / 45°0Overcast
53 °Overcast

O'Fallon, Monday, 2 November

Overcast. High 53°, low 45°.

Pressure30.24 inHg
Wind15.4 mph NW
Humidity51%
Visibility—
Dew point33°
Tue, 0357° / 38°0Overcast
57 °Overcast

O'Fallon, Tuesday, 3 November

Overcast. High 57°, low 38°.

Pressure30.33 inHg
Wind8.1 mph NW
Humidity40%
Visibility—
Dew point29°
Wed, 0460° / 41°0Clear
60 °Clear

O'Fallon, Wednesday, 4 November

Clear. High 60°, low 41°.

Pressure30.27 inHg
Wind7.6 mph NW
Humidity36%
Visibility—
Dew point29°
Thu, 0562° / 42°0Clear
62 °Clear

O'Fallon, Thursday, 5 November

Clear. High 62°, low 42°.

Pressure30.27 inHg
Wind6.3 mph S
Humidity34%
Visibility—
Dew point29°

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.