EN
English Español

As of 00:30 CDT

Weather in Alton, IA

54°Current weather

Alton, Tuesday, 13 October, 00:30

Clear. Feels like 53°. High 61°, low 46°.

Pressure29.85 inHg
Wind9.6 mph NW
Humidity83%
Visibility6.2 mi
Dew point49°
Wed, 1461° / 44°0Partly cloudy
61 °Partly cloudy

Alton, Wednesday, 14 October

Partly cloudy. High 61°, low 44°.

Pressure30.21 inHg
Wind9 mph NE
Humidity57%
Visibility6.2 mi
Dew point41°
Thu, 1556° / 47°0.56Rain
56 °Rain

Alton, Thursday, 15 October

Rain. High 56°, low 47°.

Pressure30.18 inHg
Wind9.9 mph N
Humidity94%
Visibility1.8 mi
Dew point49°
Fri, 1654° / 41°0Clear
54 °Clear

Alton, Friday, 16 October

Clear. High 54°, low 41°.

Pressure30.62 inHg
Wind13.1 mph N
Humidity52%
Visibility6.2 mi
Dew point32°
Sat, 1760° / 38°0Clear
60 °Clear

Alton, Saturday, 17 October

Clear. High 60°, low 38°.

Pressure30.27 inHg
Wind17.4 mph S
Humidity44%
Visibility—
Dew point32°
Sun, 1865° / 47°0Partly cloudy
65 °Partly cloudy

Alton, Sunday, 18 October

Partly cloudy. High 65°, low 47°.

Pressure29.94 inHg
Wind15.2 mph S
Humidity48%
Visibility—
Dew point39°
Mon, 1957° / 49°0Overcast
57 °Overcast

Alton, Monday, 19 October

Overcast. High 57°, low 49°.

Pressure30.03 inHg
Wind10 mph S
Humidity80%
Visibility—
Dew point50°
Tue, 2069° / 52°0Partly cloudy
69 °Partly cloudy

Alton, Tuesday, 20 October

Partly cloudy. High 69°, low 52°.

Pressure29.97 inHg
Wind16.4 mph S
Humidity58%
Visibility—
Dew point50°
Wed, 2168° / 58°0.21Rain
68 °Rain

Alton, Wednesday, 21 October

Rain. High 68°, low 58°.

Pressure29.85 inHg
Wind23 mph S
Humidity83%
Visibility—
Dew point60°
Thu, 2267° / 47°1.16Rain
67 °Rain

Alton, Thursday, 22 October

Rain. High 67°, low 47°.

Pressure29.62 inHg
Wind24.6 mph S
Humidity90%
Visibility—
Dew point64°
Fri, 2359° / 44°0.02Light rain
59 °Light rain

Alton, Friday, 23 October

Light rain. High 59°, low 44°.

Pressure30.06 inHg
Wind17.2 mph W
Humidity51%
Visibility—
Dew point37°
Sat, 2454° / 42°0Mostly clear
54 °Mostly clear

Alton, Saturday, 24 October

Mostly clear. High 54°, low 42°.

Pressure30.45 inHg
Wind11 mph NW
Humidity40%
Visibility—
Dew point28°
Sun, 2555° / 40°0Mostly clear
55 °Mostly clear

Alton, Sunday, 25 October

Mostly clear. High 55°, low 40°.

Pressure30.30 inHg
Wind10.4 mph W
Humidity49%
Visibility—
Dew point33°
Mon, 2659° / 41°0Overcast
59 °Overcast

Alton, Monday, 26 October

Overcast. High 59°, low 41°.

Pressure30.09 inHg
Wind13.1 mph W
Humidity53%
Visibility—
Dew point36°
Tue, 2765° / 50°0Clear
65 °Clear

Alton, Tuesday, 27 October

Clear. High 65°, low 50°.

Pressure29.83 inHg
Wind18.4 mph NW
Humidity58%
Visibility—
Dew point46°
Wed, 2855° / 44°0Clear
55 °Clear

Alton, Wednesday, 28 October

Clear. High 55°, low 44°.

Pressure30.00 inHg
Wind16 mph NW
Humidity39%
Visibility—
Dew point29°

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.