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As of 16:53 CDT

Weather in Alton, IA

56°Current weather

Alton, Wednesday, 14 October, 16:53

Overcast. Feels like 55°. High 56°, low 46°.

Pressure30.15 inHg
Wind8 mph NE
Humidity70%
Visibility6.2 mi
Dew point47°
Thu, 1556° / 48°0.31Rain
56 °Rain

Alton, Thursday, 15 October

Rain. High 56°, low 48°.

Pressure30.09 inHg
Wind7.9 mph N
Humidity92%
Visibility4.6 mi
Dew point49°
Fri, 1651° / 38°0Clear
51 °Clear

Alton, Friday, 16 October

Clear. High 51°, low 38°.

Pressure30.56 inHg
Wind18.7 mph N
Humidity58%
Visibility6.2 mi
Dew point30°
Sat, 1757° / 33°0Clear
57 °Clear

Alton, Saturday, 17 October

Clear. High 57°, low 33°.

Pressure30.47 inHg
Wind13.9 mph S
Humidity47%
Visibility6.2 mi
Dew point30°
Sun, 1862° / 42°0Clear
62 °Clear

Alton, Sunday, 18 October

Clear. High 62°, low 42°.

Pressure30.24 inHg
Wind12.3 mph S
Humidity55%
Visibility6.2 mi
Dew point38°
Mon, 1962° / 42°0Clear
62 °Clear

Alton, Monday, 19 October

Clear. High 62°, low 42°.

Pressure30.30 inHg
Wind8.9 mph S
Humidity57%
Visibility—
Dew point42°
Tue, 2068° / 46°0Clear
68 °Clear

Alton, Tuesday, 20 October

Clear. High 68°, low 46°.

Pressure30.18 inHg
Wind15.1 mph S
Humidity47%
Visibility—
Dew point42°
Wed, 2170° / 55°0.07Light rain
70 °Light rain

Alton, Wednesday, 21 October

Light rain. High 70°, low 55°.

Pressure29.94 inHg
Wind17.9 mph S
Humidity63%
Visibility—
Dew point53°
Thu, 2272° / 54°0Clear
72 °Clear

Alton, Thursday, 22 October

Clear. High 72°, low 54°.

Pressure30.00 inHg
Wind9.6 mph N
Humidity57%
Visibility—
Dew point50°
Fri, 2368° / 57°0.52Rain
68 °Rain

Alton, Friday, 23 October

Rain. High 68°, low 57°.

Pressure29.83 inHg
Wind20.4 mph S
Humidity95%
Visibility—
Dew point60°
Sat, 2466° / 45°0.25Light rain
66 °Light rain

Alton, Saturday, 24 October

Light rain. High 66°, low 45°.

Pressure30.12 inHg
Wind20.7 mph NW
Humidity51%
Visibility—
Dew point35°
Sun, 2553° / 40°0Clear
53 °Clear

Alton, Sunday, 25 October

Clear. High 53°, low 40°.

Pressure30.42 inHg
Wind15.4 mph NW
Humidity43%
Visibility—
Dew point28°
Mon, 2660° / 39°0Clear
60 °Clear

Alton, Monday, 26 October

Clear. High 60°, low 39°.

Pressure30.30 inHg
Wind14.7 mph S
Humidity39%
Visibility—
Dew point29°
Tue, 2763° / 48°0Overcast
63 °Overcast

Alton, Tuesday, 27 October

Overcast. High 63°, low 48°.

Pressure30.00 inHg
Wind21.4 mph SW
Humidity53%
Visibility—
Dew point42°
Wed, 2861° / 44°0Clear
61 °Clear

Alton, Wednesday, 28 October

Clear. High 61°, low 44°.

Pressure29.85 inHg
Wind17.4 mph SW
Humidity56%
Visibility—
Dew point40°
Thu, 2964° / 48°0Overcast
64 °Overcast

Alton, Thursday, 29 October

Overcast. High 64°, low 48°.

Pressure30.00 inHg
Wind10.1 mph S
Humidity45%
Visibility—
Dew point38°

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 Alton, IA 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 Alton, IA 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.