As of 03:49 CST

Weather in Vandalia, IL

45°

Vandalia, Thursday, 12 November, 03:49

Partly cloudy. Feels like 45°. High 52°, low 34°.

Pressure29.88 inHg

Wind1 mph NE

Humidity85%

Visibility6.2 mi

Dew point41°

See detailed hourly forecast

Fri, 1346° / 34°

46 °

Vandalia, Friday, 13 November

Overcast. High 46°, low 34°.

Pressure30.09 inHg

Wind12.9 mph N

Humidity63%

Visibility6.2 mi

Dew point27°

Sat, 1448° / 31°

48 °

Vandalia, Saturday, 14 November

Clear. High 48°, low 31°.

Pressure30.33 inHg

Wind4 mph NW

Humidity55%

Visibility6.2 mi

Dew point27°

Sun, 1550° / 30°

50 °

Vandalia, Sunday, 15 November

Overcast. High 50°, low 30°.

Pressure30.47 inHg

Wind2.1 mph NW

Humidity50%

Visibility6.2 mi

Dew point28°

Mon, 1652° / 30°

52 °

Vandalia, Monday, 16 November

Clear. High 52°, low 30°.

Pressure30.50 inHg

Wind3.7 mph NE

Humidity48%

Visibility—

Dew point29°

Tue, 1754° / 31°

54 °

Vandalia, Tuesday, 17 November

Clear. High 54°, low 31°.

Pressure30.50 inHg

Wind5.3 mph SE

Humidity47%

Visibility—

Dew point30°

Wed, 1862° / 39°

62 °

Vandalia, Wednesday, 18 November

Clear. High 62°, low 39°.

Pressure30.33 inHg

Wind11.2 mph S

Humidity33%

Visibility—

Dew point28°

Thu, 1963° / 44°

63 °

Vandalia, Thursday, 19 November

Overcast. High 63°, low 44°.

Pressure30.21 inHg

Wind15.1 mph S

Humidity33%

Visibility—

Dew point30°

Fri, 2070° / 48°

70 °

Vandalia, Friday, 20 November

Partly cloudy. High 70°, low 48°.

Pressure30.18 inHg

Wind10.5 mph S

Humidity37%

Visibility—

Dew point38°

Sat, 2170° / 51°

70 °

Vandalia, Saturday, 21 November

Overcast. High 70°, low 51°.

Pressure30.15 inHg

Wind8.5 mph S

Humidity39%

Visibility—

Dew point40°

Sun, 2267° / 50°

0.03

67 °

Vandalia, Sunday, 22 November

Light rain. High 67°, low 50°.

Pressure29.83 inHg

Wind19.3 mph SW

Humidity32%

Visibility—

Dew point34°

Mon, 2349° / 41°

49 °

Vandalia, Monday, 23 November

Overcast. High 49°, low 41°.

Pressure29.91 inHg

Wind11.5 mph W

Humidity46%

Visibility—

Dew point26°

Tue, 2453° / 39°

0.02

53 °

Vandalia, Tuesday, 24 November

Light rain. High 53°, low 39°.

Pressure29.88 inHg

Wind8.6 mph NW

Humidity39%

Visibility—

Dew point27°

Wed, 2544° / 29°

44 °

Vandalia, Wednesday, 25 November

Overcast. High 44°, low 29°.

Pressure30.21 inHg

Wind15.7 mph NW

Humidity38%

Visibility—

Dew point18°

Thu, 2637° / 22°

37 °

Vandalia, Thursday, 26 November

Overcast. High 37°, low 22°.

Pressure30.50 inHg

Wind6.1 mph NW

Humidity20%

Visibility—

Dew point-4°

Fri, 2750° / 32°

50 °

Vandalia, Friday, 27 November

Overcast. High 50°, low 32°.

Pressure30.30 inHg

Wind10.9 mph SW

Humidity27%

Visibility—

Dew point13°

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.