EN
English Español

As of 15:45 CST

Weather in O'Fallon, IL

64°Current weather

O'Fallon, Monday, 2 November, 15:45

Fog. Feels like 64°. High 65°, low 57°.

Pressure29.97 inHg
Wind11.5 mph S
Humidity97%
Visibility2.0 mi
Dew point63°

Two-week outlook for O'Fallon, IL: week one averages a high of 61.4° and week two 58.5°, so week two runs 2.9° cooler than week one. Around 1.0 inches of precipitation are expected over the 14 days, across 2 wet days. The nearest weekend, November 7: 57°, dry.

Week one vs week two

WeekHighLowPrecipitationVs normal
1st (November 2 – November 8)61.4°52.4°1.0 in / 2 d—
2nd (November 9 – November 15)58.5°41.9°0.0 in / 0 d—

Weekend weather

Sat, November 7
Overcast
57°50°
no precip.
Sun, November 8
Light rain
53°47°
no precip.
Sat, November 14
Overcast
60°41°
no precip.
Sun, November 15
Overcast
59°47°
no precip.
Tue, 0368° / 61°0.92Heavy rain
68 °Heavy rain

O'Fallon, Tuesday, 3 November

Heavy rain. High 68°, low 61°.

Pressure29.80 inHg
Wind18 mph S
Humidity78%
Visibility2.8 mi
Dew point64°
Wed, 0463° / 54°0.05Rain
63 °Rain

O'Fallon, Wednesday, 4 November

Rain. High 63°, low 54°.

Pressure29.83 inHg
Wind9.9 mph W
Humidity66%
Visibility6.2 mi
Dew point49°
Thu, 0568° / 49°0.01Light rain
68 °Light rain

O'Fallon, Thursday, 5 November

Light rain. High 68°, low 49°.

Pressure29.83 inHg
Wind8.3 mph SW
Humidity52%
Visibility6.2 mi
Dew point48°
Fri, 0655° / 50°0.02Light rain
55 °Light rain

O'Fallon, Friday, 6 November

Light rain. High 55°, low 50°.

Pressure29.94 inHg
Wind9.2 mph NW
Humidity75%
Visibility6.2 mi
Dew point46°
Sat, 0757° / 50°0Overcast
57 °Overcast

O'Fallon, Saturday, 7 November

Overcast. High 57°, low 50°.

Pressure30.09 inHg
Wind7.6 mph NW
Humidity61%
Visibility—
Dew point43°
Sun, 0853° / 47°0.01Light rain
53 °Light rain

O'Fallon, Sunday, 8 November

Light rain. High 53°, low 47°.

Pressure29.88 inHg
Wind19.7 mph W
Humidity63%
Visibility—
Dew point38°
Mon, 0955° / 41°0Overcast
55 °Overcast

O'Fallon, Monday, 9 November

Overcast. High 55°, low 41°.

Pressure30.12 inHg
Wind12.8 mph NW
Humidity44%
Visibility—
Dew point31°
Tue, 1064° / 42°0Clear
64 °Clear

O'Fallon, Tuesday, 10 November

Clear. High 64°, low 42°.

Pressure30.03 inHg
Wind11.7 mph NW
Humidity41%
Visibility—
Dew point35°
Wed, 1159° / 43°0.01Light rain
59 °Light rain

O'Fallon, Wednesday, 11 November

Light rain. High 59°, low 43°.

Pressure30.06 inHg
Wind7.9 mph SW
Humidity45%
Visibility—
Dew point35°
Thu, 1256° / 43°0.04Light rain
56 °Light rain

O'Fallon, Thursday, 12 November

Light rain. High 56°, low 43°.

Pressure30.06 inHg
Wind9.8 mph NE
Humidity44%
Visibility—
Dew point32°
Fri, 1356° / 36°0Clear
56 °Clear

O'Fallon, Friday, 13 November

Clear. High 56°, low 36°.

Pressure30.09 inHg
Wind6.3 mph NE
Humidity34%
Visibility—
Dew point24°
Sat, 1460° / 41°0Overcast
60 °Overcast

O'Fallon, Saturday, 14 November

Overcast. High 60°, low 41°.

Pressure30.12 inHg
Wind5.5 mph SW
Humidity26%
Visibility—
Dew point22°
Sun, 1559° / 47°0Overcast
59 °Overcast

O'Fallon, Sunday, 15 November

Overcast. High 59°, low 47°.

Pressure30.03 inHg
Wind7.8 mph E
Humidity27%
Visibility—
Dew point24°

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.