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As of 00:04 CDT

Weather in O'Fallon, IL

48°Current weather

O'Fallon, Thursday, 22 October, 00:04

Clear. Feels like 48°. High 77°, low 47°.

Pressure30.21 inHg
Wind2.7 mph SE
Humidity87%
Visibility6.2 mi
Dew point48°

Two-week outlook for O'Fallon, IL: week one averages a high of 71.7° and week two 61.6°, so week two runs 10.1° cooler than week one. Around 0.6 inches of precipitation are expected over the 14 days, across 4 wet days. The nearest weekend, October 24: 73°, dry.

Week one vs week two

WeekHighLowPrecipitationVs normal
1st (October 22 – October 28)71.7°49.3°0.1 in / 1 d—
2nd (October 29 – November 4)61.6°45.2°0.5 in / 3 d—

Weekend weather

Sat, October 24
Mostly clear
73°50°
no precip.
Sun, October 25
Overcast
75°51°
no precip.
Sat, October 31
Overcast
70°48°
no precip.
Sun, November 1
Rain
63°54°
0.42 in
Fri, 2374° / 47°0Clear
74 °Clear

O'Fallon, Friday, 23 October

Clear. High 74°, low 47°.

Pressure30.30 inHg
Wind5 mph SE
Humidity47%
Visibility6.2 mi
Dew point48°
Sat, 2473° / 50°0Mostly clear
73 °Mostly clear

O'Fallon, Saturday, 24 October

Mostly clear. High 73°, low 50°.

Pressure30.36 inHg
Wind4.3 mph SE
Humidity49%
Visibility6.2 mi
Dew point49°
Sun, 2575° / 51°0Overcast
75 °Overcast

O'Fallon, Sunday, 25 October

Overcast. High 75°, low 51°.

Pressure30.39 inHg
Wind2.1 mph S
Humidity51%
Visibility6.2 mi
Dew point51°
Mon, 2673° / 54°0Overcast
73 °Overcast

O'Fallon, Monday, 26 October

Overcast. High 73°, low 54°.

Pressure30.33 inHg
Wind4.6 mph SE
Humidity41%
Visibility—
Dew point45°
Tue, 2772° / 53°0Overcast
72 °Overcast

O'Fallon, Tuesday, 27 October

Overcast. High 72°, low 53°.

Pressure30.21 inHg
Wind9.6 mph NW
Humidity38%
Visibility—
Dew point43°
Wed, 2858° / 43°0.09Light rain
58 °Light rain

O'Fallon, Wednesday, 28 October

Light rain. High 58°, low 43°.

Pressure30.30 inHg
Wind15.1 mph NW
Humidity59%
Visibility—
Dew point39°
Thu, 2958° / 41°0.04Light rain
58 °Light rain

O'Fallon, Thursday, 29 October

Light rain. High 58°, low 41°.

Pressure30.33 inHg
Wind12.3 mph NW
Humidity39%
Visibility—
Dew point28°
Fri, 3065° / 40°0Partly cloudy
65 °Partly cloudy

O'Fallon, Friday, 30 October

Partly cloudy. High 65°, low 40°.

Pressure30.18 inHg
Wind11.6 mph S
Humidity32%
Visibility—
Dew point29°
Sat, 3170° / 48°0Overcast
70 °Overcast

O'Fallon, Saturday, 31 October

Overcast. High 70°, low 48°.

Pressure30.06 inHg
Wind18.5 mph S
Humidity40%
Visibility—
Dew point40°
Sun, 0163° / 54°0.42Rain
63 °Rain

O'Fallon, Sunday, 1 November

Rain. High 63°, low 54°.

Pressure30.00 inHg
Wind15 mph S
Humidity88%
Visibility—
Dew point53°
Mon, 0261° / 47°0.07Light rain
61 °Light rain

O'Fallon, Monday, 2 November

Light rain. High 61°, low 47°.

Pressure30.24 inHg
Wind17.8 mph N
Humidity41%
Visibility—
Dew point36°
Tue, 0359° / 38°0Mostly clear
59 °Mostly clear

O'Fallon, Tuesday, 3 November

Mostly clear. High 59°, low 38°.

Pressure30.36 inHg
Wind9.2 mph NW
Humidity27%
Visibility—
Dew point20°
Wed, 0456° / 48°0.02Light rain
56 °Light rain

O'Fallon, Wednesday, 4 November

Light rain. High 56°, low 48°.

Pressure29.91 inHg
Wind18.1 mph S
Humidity74%
Visibility—
Dew point45°

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.