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As of 04:57 CDT

Weather in Altamont, IL

44°Current weather

Altamont, Saturday, 17 October, 04:57

Clear. Feels like 39°. High 56°, low 43°.

Pressure30.47 inHg
Wind6.9 mph N
Humidity80%
Visibility6.2 mi
Dew point38°
Sun, 1862° / 40°0Clear
62 °Clear

Altamont, Sunday, 18 October

Clear. High 62°, low 40°.

Pressure30.50 inHg
Wind7.3 mph S
Humidity42%
Visibility6.2 mi
Dew point36°
Mon, 1967° / 41°0Clear
67 °Clear

Altamont, Monday, 19 October

Clear. High 67°, low 41°.

Pressure30.39 inHg
Wind2.3 mph S
Humidity44%
Visibility6.2 mi
Dew point42°
Tue, 2068° / 44°0Overcast
68 °Overcast

Altamont, Tuesday, 20 October

Overcast. High 68°, low 44°.

Pressure30.36 inHg
Wind1.6 mph NE
Humidity44%
Visibility6.2 mi
Dew point44°
Wed, 2170° / 49°0Overcast
70 °Overcast

Altamont, Wednesday, 21 October

Overcast. High 70°, low 49°.

Pressure30.27 inHg
Wind3.4 mph E
Humidity41%
Visibility—
Dew point43°
Thu, 2272° / 47°0Mostly clear
72 °Mostly clear

Altamont, Thursday, 22 October

Mostly clear. High 72°, low 47°.

Pressure30.21 inHg
Wind4.7 mph SE
Humidity42%
Visibility—
Dew point43°
Fri, 2376° / 54°0Overcast
76 °Overcast

Altamont, Friday, 23 October

Overcast. High 76°, low 54°.

Pressure30.18 inHg
Wind7.9 mph SE
Humidity26%
Visibility—
Dew point35°
Sat, 2476° / 54°0Overcast
76 °Overcast

Altamont, Saturday, 24 October

Overcast. High 76°, low 54°.

Pressure30.18 inHg
Wind9.5 mph SE
Humidity29%
Visibility—
Dew point37°
Sun, 2578° / 60°0Overcast
78 °Overcast

Altamont, Sunday, 25 October

Overcast. High 78°, low 60°.

Pressure30.06 inHg
Wind16.2 mph S
Humidity31%
Visibility—
Dew point41°
Mon, 2668° / 42°0.02Light rain
68 °Light rain

Altamont, Monday, 26 October

Light rain. High 68°, low 42°.

Pressure30.12 inHg
Wind16.2 mph SW
Humidity68%
Visibility—
Dew point44°
Tue, 2758° / 36°0Overcast
58 °Overcast

Altamont, Tuesday, 27 October

Overcast. High 58°, low 36°.

Pressure30.42 inHg
Wind7.6 mph SE
Humidity33%
Visibility—
Dew point24°
Wed, 2871° / 44°0.24Rain
71 °Rain

Altamont, Wednesday, 28 October

Rain. High 71°, low 44°.

Pressure30.12 inHg
Wind19.6 mph S
Humidity24%
Visibility—
Dew point27°
Thu, 2967° / 52°0Light rain
67 °Light rain

Altamont, Thursday, 29 October

Light rain. High 67°, low 52°.

Pressure30.09 inHg
Wind20 mph SW
Humidity42%
Visibility—
Dew point40°
Fri, 3070° / 47°0Overcast
70 °Overcast

Altamont, Friday, 30 October

Overcast. High 70°, low 47°.

Pressure30.06 inHg
Wind13.6 mph SE
Humidity31%
Visibility—
Dew point33°
Sat, 3177° / 57°0.82Rain
77 °Rain

Altamont, Saturday, 31 October

Rain. High 77°, low 57°.

Pressure29.68 inHg
Wind21.9 mph S
Humidity61%
Visibility—
Dew point60°
Sun, 0165° / 49°0.16Light rain
65 °Light rain

Altamont, Sunday, 1 November

Light rain. High 65°, low 49°.

Pressure30.00 inHg
Wind18 mph S
Humidity64%
Visibility—
Dew point43°

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.