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As of 11:18 CST

Weather in O'Fallon, IL

60°Current weather

O'Fallon, Monday, 2 November, 11:18

Overcast. Feels like 60°. High 66°, low 57°.

Pressure30.06 inHg
Wind11.7 mph S
Humidity96%
Visibility6.2 mi
Dew point59°

Two-week outlook for O'Fallon, IL: week one averages a high of 62.4° and week two 53.8°, so week two runs 8.5° cooler than week one. Around 2.2 inches of precipitation are expected over the 14 days, across 5 wet days. The nearest weekend, November 7: 58°, dry.

Week one vs week two

WeekHighLowPrecipitationVs normal
1st (November 2 – November 8)62.4°52.3°1.3 in / 3 d—
2nd (November 9 – November 15)53.8°40.9°0.8 in / 2 d—

Weekend weather

Sat, November 7
Overcast
58°49°
no precip.
Sun, November 8
Light rain
50°46°
0.06 in
Sat, November 14
Overcast
54°38°
no precip.
Sun, November 15
Rain
44°41°
0.63 in
Tue, 0370° / 63°0.76Heavy rain
70 °Heavy rain

O'Fallon, Tuesday, 3 November

Heavy rain. High 70°, low 63°.

Pressure29.85 inHg
Wind18.1 mph S
Humidity63%
Visibility6.2 mi
Dew point62°
Wed, 0465° / 54°0.5Heavy rain
65 °Heavy rain

O'Fallon, Wednesday, 4 November

Heavy rain. High 65°, low 54°.

Pressure29.83 inHg
Wind11.2 mph W
Humidity61%
Visibility6.2 mi
Dew point48°
Thu, 0568° / 49°0.01Light rain
68 °Light rain

O'Fallon, Thursday, 5 November

Light rain. High 68°, low 49°.

Pressure29.85 inHg
Wind6.4 mph SW
Humidity54%
Visibility6.2 mi
Dew point49°
Fri, 0658° / 48°0Overcast
58 °Overcast

O'Fallon, Friday, 6 November

Overcast. High 58°, low 48°.

Pressure29.94 inHg
Wind11.6 mph NW
Humidity55%
Visibility—
Dew point41°
Sat, 0758° / 49°0Overcast
58 °Overcast

O'Fallon, Saturday, 7 November

Overcast. High 58°, low 49°.

Pressure30.03 inHg
Wind6.6 mph S
Humidity64%
Visibility—
Dew point44°
Sun, 0850° / 46°0.06Light rain
50 °Light rain

O'Fallon, Sunday, 8 November

Light rain. High 50°, low 46°.

Pressure29.77 inHg
Wind16.4 mph NW
Humidity80%
Visibility—
Dew point42°
Mon, 0957° / 41°0Overcast
57 °Overcast

O'Fallon, Monday, 9 November

Overcast. High 57°, low 41°.

Pressure30.09 inHg
Wind10.1 mph W
Humidity47%
Visibility—
Dew point33°
Tue, 1061° / 45°0Clear
61 °Clear

O'Fallon, Tuesday, 10 November

Clear. High 61°, low 45°.

Pressure30.12 inHg
Wind10 mph NW
Humidity41%
Visibility—
Dew point33°
Wed, 1156° / 47°0.22Rain
56 °Rain

O'Fallon, Wednesday, 11 November

Rain. High 56°, low 47°.

Pressure29.97 inHg
Wind9.6 mph S
Humidity87%
Visibility—
Dew point48°
Thu, 1254° / 41°0Overcast
54 °Overcast

O'Fallon, Thursday, 12 November

Overcast. High 54°, low 41°.

Pressure30.15 inHg
Wind12 mph N
Humidity56%
Visibility—
Dew point33°
Fri, 1350° / 35°0Overcast
50 °Overcast

O'Fallon, Friday, 13 November

Overcast. High 50°, low 35°.

Pressure30.21 inHg
Wind5.7 mph E
Humidity50%
Visibility—
Dew point29°
Sat, 1454° / 38°0Overcast
54 °Overcast

O'Fallon, Saturday, 14 November

Overcast. High 54°, low 38°.

Pressure30.09 inHg
Wind11.5 mph SE
Humidity41%
Visibility—
Dew point28°
Sun, 1544° / 41°0.63Rain
44 °Rain

O'Fallon, Sunday, 15 November

Rain. High 44°, low 41°.

Pressure29.77 inHg
Wind9.9 mph NE
Humidity95%
Visibility—
Dew point41°

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.