As of 09:24 CDT

Weather in Altamont, IL

47°

Altamont, Sunday, 18 October, 09:24

Clear. Feels like 44°. High 63°, low 38°.

Pressure30.53 inHg

Wind4.6 mph SE

Humidity84%

Visibility6.2 mi

Dew point42°

See detailed hourly forecast

Mon, 1966° / 39°

66 °

Altamont, Monday, 19 October

Clear. High 66°, low 39°.

Pressure30.42 inHg

Wind1.4 mph SW

Humidity52%

Visibility6.2 mi

Dew point45°

Tue, 2068° / 44°

68 °

Altamont, Tuesday, 20 October

Clear. High 68°, low 44°.

Pressure30.36 inHg

Wind2.2 mph E

Humidity47%

Visibility6.2 mi

Dew point45°

Wed, 2169° / 45°

69 °

Altamont, Wednesday, 21 October

Clear. High 69°, low 45°.

Pressure30.30 inHg

Wind0.5 mph SW

Humidity49%

Visibility6.2 mi

Dew point47°

Thu, 2269° / 47°

69 °

Altamont, Thursday, 22 October

Clear. High 69°, low 47°.

Pressure30.27 inHg

Wind5.1 mph NE

Humidity47%

Visibility—

Dew point45°

Fri, 2367° / 48°

67 °

Altamont, Friday, 23 October

Clear. High 67°, low 48°.

Pressure30.30 inHg

Wind7 mph E

Humidity53%

Visibility—

Dew point47°

Sat, 2478° / 52°

78 °

Altamont, Saturday, 24 October

Overcast. High 78°, low 52°.

Pressure30.33 inHg

Wind11 mph S

Humidity34%

Visibility—

Dew point41°

Sun, 2570° / 54°

70 °

Altamont, Sunday, 25 October

Overcast. High 70°, low 54°.

Pressure30.39 inHg

Wind10.7 mph NE

Humidity54%

Visibility—

Dew point50°

Mon, 2673° / 52°

73 °

Altamont, Monday, 26 October

Overcast. High 73°, low 52°.

Pressure30.30 inHg

Wind7.2 mph SW

Humidity36%

Visibility—

Dew point40°

Tue, 2775° / 57°

75 °

Altamont, Tuesday, 27 October

Overcast. High 75°, low 57°.

Pressure30.24 inHg

Wind10.2 mph SE

Humidity36%

Visibility—

Dew point43°

Wed, 2873° / 60°

0.09

73 °

Altamont, Wednesday, 28 October

Light rain. High 73°, low 60°.

Pressure30.00 inHg

Wind15.2 mph S

Humidity85%

Visibility—

Dew point58°

Thu, 2978° / 63°

0.1

78 °

Altamont, Thursday, 29 October

Light rain. High 78°, low 63°.

Pressure29.77 inHg

Wind14.1 mph W

Humidity58%

Visibility—

Dew point60°

Fri, 3082° / 60°

0.1

82 °

Altamont, Friday, 30 October

Light rain. High 82°, low 60°.

Pressure29.74 inHg

Wind16 mph S

Humidity54%

Visibility—

Dew point59°

Sat, 3169° / 50°

0.24

69 °

Altamont, Saturday, 31 October

Rain. High 69°, low 50°.

Pressure29.80 inHg

Wind20 mph S

Humidity38%

Visibility—

Dew point34°

Sun, 0155° / 42°

55 °

Altamont, Sunday, 1 November

Clear. High 55°, low 42°.

Pressure30.24 inHg

Wind14.9 mph W

Humidity37%

Visibility—

Dew point26°

Mon, 0260° / 38°

60 °

Altamont, Monday, 2 November

Clear. High 60°, low 38°.

Pressure30.42 inHg

Wind7.8 mph SE

Humidity30%

Visibility—

Dew point24°

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.