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As of 00:15 CDT

Weather in Vandalia, IL

62°Current weather

Vandalia, Friday, 16 October, 00:15

Overcast. Feels like 62°. High 62°, low 53°.

Pressure29.88 inHg
Wind2 mph E
Humidity89%
Visibility6.2 mi
Dew point58°
Sat, 1758° / 42°0Clear
58 °Clear

Vandalia, Saturday, 17 October

Clear. High 58°, low 42°.

Pressure30.56 inHg
Wind3.9 mph NE
Humidity52%
Visibility6.2 mi
Dew point37°
Sun, 1862° / 41°0Clear
62 °Clear

Vandalia, Sunday, 18 October

Clear. High 62°, low 41°.

Pressure30.50 inHg
Wind7.6 mph S
Humidity40%
Visibility6.2 mi
Dew point34°
Mon, 1967° / 42°0Clear
67 °Clear

Vandalia, Monday, 19 October

Clear. High 67°, low 42°.

Pressure30.39 inHg
Wind4.3 mph S
Humidity49%
Visibility6.2 mi
Dew point43°
Tue, 2069° / 44°0Mostly clear
69 °Mostly clear

Vandalia, Tuesday, 20 October

Mostly clear. High 69°, low 44°.

Pressure30.33 inHg
Wind4.7 mph E
Humidity39%
Visibility—
Dew point40°
Wed, 2173° / 49°0Partly cloudy
73 °Partly cloudy

Vandalia, Wednesday, 21 October

Partly cloudy. High 73°, low 49°.

Pressure30.30 inHg
Wind5.1 mph SE
Humidity37%
Visibility—
Dew point40°
Thu, 2277° / 53°0Partly cloudy
77 °Partly cloudy

Vandalia, Thursday, 22 October

Partly cloudy. High 77°, low 53°.

Pressure30.24 inHg
Wind6.4 mph SE
Humidity25%
Visibility—
Dew point34°
Fri, 2378° / 54°0Mostly clear
78 °Mostly clear

Vandalia, Friday, 23 October

Mostly clear. High 78°, low 54°.

Pressure30.15 inHg
Wind9.5 mph SE
Humidity26%
Visibility—
Dew point36°
Sat, 2476° / 57°0Overcast
76 °Overcast

Vandalia, Saturday, 24 October

Overcast. High 76°, low 57°.

Pressure30.21 inHg
Wind7.7 mph SE
Humidity29%
Visibility—
Dew point38°
Sun, 2576° / 55°0Overcast
76 °Overcast

Vandalia, Sunday, 25 October

Overcast. High 76°, low 55°.

Pressure30.21 inHg
Wind7 mph E
Humidity32%
Visibility—
Dew point40°
Mon, 2678° / 56°0Overcast
78 °Overcast

Vandalia, Monday, 26 October

Overcast. High 78°, low 56°.

Pressure30.03 inHg
Wind13.5 mph S
Humidity32%
Visibility—
Dew point40°
Tue, 2768° / 48°0Clear
68 °Clear

Vandalia, Tuesday, 27 October

Clear. High 68°, low 48°.

Pressure30.06 inHg
Wind9.7 mph W
Humidity35%
Visibility—
Dew point35°
Wed, 2867° / 52°0.69Heavy rain
67 °Heavy rain

Vandalia, Wednesday, 28 October

Heavy rain. High 67°, low 52°.

Pressure29.71 inHg
Wind21.9 mph SW
Humidity84%
Visibility—
Dew point54°
Thu, 2962° / 47°0Partly cloudy
62 °Partly cloudy

Vandalia, Thursday, 29 October

Partly cloudy. High 62°, low 47°.

Pressure29.94 inHg
Wind18.9 mph W
Humidity53%
Visibility—
Dew point40°
Fri, 3068° / 47°0Partly cloudy
68 °Partly cloudy

Vandalia, Friday, 30 October

Partly cloudy. High 68°, low 47°.

Pressure30.06 inHg
Wind7.7 mph NW
Humidity42%
Visibility—
Dew point40°
Sat, 3169° / 49°0Overcast
69 °Overcast

Vandalia, Saturday, 31 October

Overcast. High 69°, low 49°.

Pressure29.97 inHg
Wind9.6 mph S
Humidity41%
Visibility—
Dew point42°

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.