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As of 11:55 CDT

Weather in Vandalia, IL

55°Current weather

Vandalia, Saturday, 17 October, 11:55

Clear. Feels like 53°. High 55°, low 40°.

Pressure30.53 inHg
Wind3.6 mph NE
Humidity59%
Visibility6.2 mi
Dew point41°
Sun, 1862° / 40°0Clear
62 °Clear

Vandalia, Sunday, 18 October

Clear. High 62°, low 40°.

Pressure30.50 inHg
Wind7.7 mph S
Humidity46%
Visibility6.2 mi
Dew point38°
Mon, 1966° / 42°0Clear
66 °Clear

Vandalia, Monday, 19 October

Clear. High 66°, low 42°.

Pressure30.42 inHg
Wind1.5 mph S
Humidity48%
Visibility6.2 mi
Dew point43°
Tue, 2068° / 44°0Overcast
68 °Overcast

Vandalia, Tuesday, 20 October

Overcast. High 68°, low 44°.

Pressure30.36 inHg
Wind2.5 mph E
Humidity46%
Visibility6.2 mi
Dew point45°
Wed, 2169° / 46°0.1Light rain
69 °Light rain

Vandalia, Wednesday, 21 October

Light rain. High 69°, low 46°.

Pressure30.27 inHg
Wind2.6 mph E
Humidity45%
Visibility—
Dew point44°
Thu, 2271° / 48°0Clear
71 °Clear

Vandalia, Thursday, 22 October

Clear. High 71°, low 48°.

Pressure30.24 inHg
Wind3.8 mph NE
Humidity42%
Visibility—
Dew point43°
Fri, 2376° / 53°0Clear
76 °Clear

Vandalia, Friday, 23 October

Clear. High 76°, low 53°.

Pressure30.15 inHg
Wind8.4 mph SE
Humidity29%
Visibility—
Dew point38°
Sat, 2474° / 55°0Overcast
74 °Overcast

Vandalia, Saturday, 24 October

Overcast. High 74°, low 55°.

Pressure30.15 inHg
Wind11.8 mph S
Humidity27%
Visibility—
Dew point35°
Sun, 2577° / 61°0.02Light rain
77 °Light rain

Vandalia, Sunday, 25 October

Light rain. High 77°, low 61°.

Pressure30.09 inHg
Wind11.5 mph SW
Humidity37%
Visibility—
Dew point46°
Mon, 2676° / 56°0Clear
76 °Clear

Vandalia, Monday, 26 October

Clear. High 76°, low 56°.

Pressure30.18 inHg
Wind7.3 mph SE
Humidity44%
Visibility—
Dew point48°
Tue, 2779° / 62°0Overcast
79 °Overcast

Vandalia, Tuesday, 27 October

Overcast. High 79°, low 62°.

Pressure30.09 inHg
Wind16.5 mph S
Humidity28%
Visibility—
Dew point41°
Wed, 2870° / 62°0.21Light rain
70 °Light rain

Vandalia, Wednesday, 28 October

Light rain. High 70°, low 62°.

Pressure29.97 inHg
Wind18.2 mph SW
Humidity46%
Visibility—
Dew point47°
Thu, 2969° / 59°0.12Light rain
69 °Light rain

Vandalia, Thursday, 29 October

Light rain. High 69°, low 59°.

Pressure30.09 inHg
Wind13.5 mph SW
Humidity31%
Visibility—
Dew point35°
Fri, 3077° / 62°0.2Light rain
77 °Light rain

Vandalia, Friday, 30 October

Light rain. High 77°, low 62°.

Pressure29.80 inHg
Wind20.9 mph S
Humidity61%
Visibility—
Dew point61°
Sat, 3172° / 52°0.26Light rain
72 °Light rain

Vandalia, Saturday, 31 October

Light rain. High 72°, low 52°.

Pressure29.83 inHg
Wind22.3 mph SW
Humidity50%
Visibility—
Dew point45°
Sun, 0165° / 46°0Clear
65 °Clear

Vandalia, Sunday, 1 November

Clear. High 65°, low 46°.

Pressure30.15 inHg
Wind7.1 mph E
Humidity30%
Visibility—
Dew point29°

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.