As of 04:55 CDT

Weather in Altamont, IL

71°

Altamont, Wednesday, 14 October, 04:55

Overcast. Feels like 72°. High 83°, low 69°.

Pressure29.94 inHg

Wind4.6 mph S

Humidity89%

Visibility6.2 mi

Dew point68°

See detailed hourly forecast

Thu, 1583° / 65°

0.95

83 °

Altamont, Thursday, 15 October

Rain. High 83°, low 65°.

Pressure29.97 inHg

Wind10.4 mph SW

Humidity81%

Visibility4.0 mi

Dew point72°

Fri, 1669° / 52°

0.05

69 °

Altamont, Friday, 16 October

Light rain. High 69°, low 52°.

Pressure30.12 inHg

Wind18.8 mph NW

Humidity43%

Visibility6.2 mi

Dew point36°

Sat, 1758° / 43°

58 °

Altamont, Saturday, 17 October

Clear. High 58°, low 43°.

Pressure30.53 inHg

Wind6.8 mph NE

Humidity52%

Visibility6.2 mi

Dew point38°

Sun, 1862° / 41°

62 °

Altamont, Sunday, 18 October

Clear. High 62°, low 41°.

Pressure30.47 inHg

Wind7 mph S

Humidity37%

Visibility—

Dew point32°

Mon, 1967° / 43°

67 °

Altamont, Monday, 19 October

Overcast. High 67°, low 43°.

Pressure30.39 inHg

Wind6.7 mph SW

Humidity41%

Visibility—

Dew point38°

Tue, 2071° / 55°

71 °

Altamont, Tuesday, 20 October

Overcast. High 71°, low 55°.

Pressure30.27 inHg

Wind6.6 mph SW

Humidity43%

Visibility—

Dew point45°

Wed, 2171° / 51°

71 °

Altamont, Wednesday, 21 October

Clear. High 71°, low 51°.

Pressure30.12 inHg

Wind5.9 mph S

Humidity47%

Visibility—

Dew point46°

Thu, 2268° / 50°

68 °

Altamont, Thursday, 22 October

Overcast. High 68°, low 50°.

Pressure30.18 inHg

Wind12.6 mph NE

Humidity52%

Visibility—

Dew point47°

Fri, 2358° / 41°

58 °

Altamont, Friday, 23 October

Clear. High 58°, low 41°.

Pressure30.36 inHg

Wind11.5 mph NE

Humidity26%

Visibility—

Dew point20°

Sat, 2460° / 37°

60 °

Altamont, Saturday, 24 October

Overcast. High 60°, low 37°.

Pressure30.24 inHg

Wind7 mph E

Humidity27%

Visibility—

Dew point21°

Sun, 2554° / 44°

54 °

Altamont, Sunday, 25 October

Overcast. High 54°, low 44°.

Pressure30.03 inHg

Wind11.9 mph W

Humidity80%

Visibility—

Dew point44°

Mon, 2656° / 34°

56 °

Altamont, Monday, 26 October

Clear. High 56°, low 34°.

Pressure30.12 inHg

Wind7.9 mph NW

Humidity26%

Visibility—

Dew point17°

Tue, 2763° / 39°

63 °

Altamont, Tuesday, 27 October

Partly cloudy. High 63°, low 39°.

Pressure30.00 inHg

Wind6 mph SW

Humidity37%

Visibility—

Dew point31°

Wed, 2867° / 45°

0.05

67 °

Altamont, Wednesday, 28 October

Light rain. High 67°, low 45°.

Pressure29.94 inHg

Wind12.2 mph SW

Humidity35%

Visibility—

Dew point35°

Thu, 2955° / 52°

0.03

55 °

Altamont, Thursday, 29 October

Light rain. High 55°, low 52°.

Pressure29.91 inHg

Wind9 mph E

Humidity77%

Visibility—

Dew point47°

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 Altamont, 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 Altamont, 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.