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As of 19:44 CDT

Weather in Vandalia, IL

49°Current weather

Vandalia, Saturday, 17 October, 19:44

Clear. Feels like 49°. High 58°, low 40°.

Pressure30.45 inHg
Wind2.1 mph NE
Humidity66%
Visibility6.2 mi
Dew point38°
Sun, 1862° / 40°0Clear
62 °Clear

Vandalia, Sunday, 18 October

Clear. High 62°, low 40°.

Pressure30.47 inHg
Wind7.4 mph S
Humidity49%
Visibility6.2 mi
Dew point39°
Mon, 1966° / 42°0Clear
66 °Clear

Vandalia, Monday, 19 October

Clear. High 66°, low 42°.

Pressure30.42 inHg
Wind1.6 mph S
Humidity49%
Visibility6.2 mi
Dew point44°
Tue, 2068° / 45°0Mostly clear
68 °Mostly clear

Vandalia, Tuesday, 20 October

Mostly clear. High 68°, low 45°.

Pressure30.39 inHg
Wind2.2 mph E
Humidity48%
Visibility6.2 mi
Dew point46°
Wed, 2170° / 51°0Clear
70 °Clear

Vandalia, Wednesday, 21 October

Clear. High 70°, low 51°.

Pressure30.27 inHg
Wind0.9 mph E
Humidity52%
Visibility6.2 mi
Dew point48°
Thu, 2271° / 49°0Clear
71 °Clear

Vandalia, Thursday, 22 October

Clear. High 71°, low 49°.

Pressure30.27 inHg
Wind5 mph NE
Humidity45%
Visibility—
Dew point45°
Fri, 2375° / 51°0Partly cloudy
75 °Partly cloudy

Vandalia, Friday, 23 October

Partly cloudy. High 75°, low 51°.

Pressure30.24 inHg
Wind7.4 mph SE
Humidity34%
Visibility—
Dew point40°
Sat, 2476° / 53°0Overcast
76 °Overcast

Vandalia, Saturday, 24 October

Overcast. High 76°, low 53°.

Pressure30.30 inHg
Wind8 mph S
Humidity23%
Visibility—
Dew point31°
Sun, 2579° / 57°0Overcast
79 °Overcast

Vandalia, Sunday, 25 October

Overcast. High 79°, low 57°.

Pressure30.21 inHg
Wind13.4 mph SW
Humidity25%
Visibility—
Dew point37°
Mon, 2679° / 60°0Overcast
79 °Overcast

Vandalia, Monday, 26 October

Overcast. High 79°, low 60°.

Pressure30.15 inHg
Wind10.7 mph N
Humidity36%
Visibility—
Dew point46°
Tue, 2763° / 51°0.03Light rain
63 °Light rain

Vandalia, Tuesday, 27 October

Light rain. High 63°, low 51°.

Pressure30.24 inHg
Wind12.7 mph NE
Humidity67%
Visibility—
Dew point48°
Wed, 2866° / 44°0Partly cloudy
66 °Partly cloudy

Vandalia, Wednesday, 28 October

Partly cloudy. High 66°, low 44°.

Pressure30.27 inHg
Wind13 mph SE
Humidity37%
Visibility—
Dew point34°
Thu, 2973° / 51°0.07Light rain
73 °Light rain

Vandalia, Thursday, 29 October

Light rain. High 73°, low 51°.

Pressure29.97 inHg
Wind17.5 mph S
Humidity52%
Visibility—
Dew point50°
Fri, 3075° / 66°0.1Light rain
75 °Light rain

Vandalia, Friday, 30 October

Light rain. High 75°, low 66°.

Pressure29.91 inHg
Wind19.7 mph S
Humidity73%
Visibility—
Dew point59°
Sat, 3176° / 60°0.42Rain
76 °Rain

Vandalia, Saturday, 31 October

Rain. High 76°, low 60°.

Pressure29.88 inHg
Wind23.7 mph SW
Humidity77%
Visibility—
Dew point65°
Sun, 0177° / 57°0.03Light rain
77 °Light rain

Vandalia, Sunday, 1 November

Light rain. High 77°, low 57°.

Pressure30.12 inHg
Wind13 mph S
Humidity77%
Visibility—
Dew point63°

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.