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As of 22:08 CDT

Weather in Vandalia, IL

54°Current weather

Vandalia, Sunday, 18 October, 22:08

Clear. Feels like 52°. High 66°, low 38°.

Pressure30.39 inHg
Wind1 mph E
Humidity54%
Visibility6.2 mi
Dew point38°
Mon, 1970° / 42°0Partly cloudy
70 °Partly cloudy

Vandalia, Monday, 19 October

Partly cloudy. High 70°, low 42°.

Pressure30.39 inHg
Wind1.5 mph SE
Humidity47%
Visibility6.2 mi
Dew point44°
Tue, 2071° / 48°0Clear
71 °Clear

Vandalia, Tuesday, 20 October

Clear. High 71°, low 48°.

Pressure30.36 inHg
Wind1.7 mph E
Humidity48%
Visibility6.2 mi
Dew point46°
Wed, 2170° / 45°0Clear
70 °Clear

Vandalia, Wednesday, 21 October

Clear. High 70°, low 45°.

Pressure30.30 inHg
Wind0.7 mph N
Humidity48%
Visibility6.2 mi
Dew point47°
Thu, 2269° / 48°0Clear
69 °Clear

Vandalia, Thursday, 22 October

Clear. High 69°, low 48°.

Pressure30.30 inHg
Wind4.6 mph NE
Humidity54%
Visibility6.2 mi
Dew point49°
Fri, 2368° / 48°0Clear
68 °Clear

Vandalia, Friday, 23 October

Clear. High 68°, low 48°.

Pressure30.33 inHg
Wind6.5 mph E
Humidity50%
Visibility—
Dew point46°
Sat, 2473° / 48°0Overcast
73 °Overcast

Vandalia, Saturday, 24 October

Overcast. High 73°, low 48°.

Pressure30.36 inHg
Wind8.9 mph S
Humidity46%
Visibility—
Dew point45°
Sun, 2569° / 55°0Overcast
69 °Overcast

Vandalia, Sunday, 25 October

Overcast. High 69°, low 55°.

Pressure30.33 inHg
Wind11.4 mph S
Humidity51%
Visibility—
Dew point43°
Mon, 2671° / 53°0Overcast
71 °Overcast

Vandalia, Monday, 26 October

Overcast. High 71°, low 53°.

Pressure30.21 inHg
Wind10.8 mph SE
Humidity51%
Visibility—
Dew point45°
Tue, 2764° / 55°0.03Light rain
64 °Light rain

Vandalia, Tuesday, 27 October

Light rain. High 64°, low 55°.

Pressure30.12 inHg
Wind10 mph SW
Humidity41%
Visibility—
Dew point38°
Wed, 2861° / 54°0.16Light rain
61 °Light rain

Vandalia, Wednesday, 28 October

Light rain. High 61°, low 54°.

Pressure30.12 inHg
Wind6.9 mph E
Humidity69%
Visibility—
Dew point49°
Thu, 2970° / 56°0.11Light rain
70 °Light rain

Vandalia, Thursday, 29 October

Light rain. High 70°, low 56°.

Pressure30.00 inHg
Wind12.1 mph SE
Humidity69%
Visibility—
Dew point57°
Fri, 3071° / 64°0.35Light rain
71 °Light rain

Vandalia, Friday, 30 October

Light rain. High 71°, low 64°.

Pressure29.88 inHg
Wind16.2 mph S
Humidity83%
Visibility—
Dew point65°
Sat, 3164° / 58°0.55Rain
64 °Rain

Vandalia, Saturday, 31 October

Rain. High 64°, low 58°.

Pressure30.03 inHg
Wind12.3 mph SE
Humidity90%
Visibility—
Dew point55°
Sun, 0164° / 47°0.14Light rain
64 °Light rain

Vandalia, Sunday, 1 November

Light rain. High 64°, low 47°.

Pressure29.97 inHg
Wind25.8 mph W
Humidity51%
Visibility—
Dew point36°
Mon, 0262° / 44°0Clear
62 °Clear

Vandalia, Monday, 2 November

Clear. High 62°, low 44°.

Pressure30.06 inHg
Wind9.7 mph SW
Humidity36%
Visibility—
Dew point32°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Vandalia, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Vandalia, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.