EN
English Español

As of 18:49 CDT

Weather in Alton, IA

80°Current weather

Alton, Saturday, 10 October, 18:49

Clear. Feels like 80°. High 87°, low 64°.

Pressure29.65 inHg
Wind17.3 mph S
Humidity42%
Visibility6.2 mi
Dew point55°
Sun, 1184° / 65°0Partly cloudy
84 °Partly cloudy

Alton, Sunday, 11 October

Partly cloudy. High 84°, low 65°.

Pressure29.74 inHg
Wind13.2 mph S
Humidity50%
Visibility6.2 mi
Dew point56°
Mon, 1283° / 64°0Overcast
83 °Overcast

Alton, Monday, 12 October

Overcast. High 83°, low 64°.

Pressure29.65 inHg
Wind9.5 mph S
Humidity54%
Visibility6.2 mi
Dew point62°
Tue, 1365° / 54°0Overcast
65 °Overcast

Alton, Tuesday, 13 October

Overcast. High 65°, low 54°.

Pressure29.97 inHg
Wind7.2 mph N
Humidity64%
Visibility6.2 mi
Dew point47°
Wed, 1463° / 48°0Overcast
63 °Overcast

Alton, Wednesday, 14 October

Overcast. High 63°, low 48°.

Pressure30.21 inHg
Wind7.6 mph N
Humidity53%
Visibility6.2 mi
Dew point41°
Thu, 1560° / 50°0.33Rain
60 °Rain

Alton, Thursday, 15 October

Rain. High 60°, low 50°.

Pressure30.30 inHg
Wind7.9 mph N
Humidity85%
Visibility—
Dew point49°
Fri, 1651° / 32°0Light rain
51 °Light rain

Alton, Friday, 16 October

Light rain. High 51°, low 32°.

Pressure30.39 inHg
Wind25.5 mph NW
Humidity56%
Visibility—
Dew point27°
Sat, 1739° / 26°0Overcast
39 °Overcast

Alton, Saturday, 17 October

Overcast. High 39°, low 26°.

Pressure30.59 inHg
Wind20.4 mph NW
Humidity39%
Visibility—
Dew point12°
Sun, 1844° / 26°0Mostly clear
44 °Mostly clear

Alton, Sunday, 18 October

Mostly clear. High 44°, low 26°.

Pressure30.56 inHg
Wind15.9 mph S
Humidity32%
Visibility—
Dew point12°
Mon, 1958° / 37°0Partly cloudy
58 °Partly cloudy

Alton, Monday, 19 October

Partly cloudy. High 58°, low 37°.

Pressure30.24 inHg
Wind18.7 mph S
Humidity42%
Visibility—
Dew point28°
Tue, 2064° / 42°0Clear
64 °Clear

Alton, Tuesday, 20 October

Clear. High 64°, low 42°.

Pressure30.12 inHg
Wind14.2 mph S
Humidity45%
Visibility—
Dew point37°
Wed, 2167° / 49°0Overcast
67 °Overcast

Alton, Wednesday, 21 October

Overcast. High 67°, low 49°.

Pressure29.97 inHg
Wind14.5 mph S
Humidity46%
Visibility—
Dew point39°
Thu, 2257° / 45°0.3Rain
57 °Rain

Alton, Thursday, 22 October

Rain. High 57°, low 45°.

Pressure30.27 inHg
Wind20.2 mph N
Humidity53%
Visibility—
Dew point40°
Fri, 2349° / 38°0Overcast
49 °Overcast

Alton, Friday, 23 October

Overcast. High 49°, low 38°.

Pressure30.42 inHg
Wind12.2 mph N
Humidity54%
Visibility—
Dew point31°
Sat, 2453° / 36°0Clear
53 °Clear

Alton, Saturday, 24 October

Clear. High 53°, low 36°.

Pressure30.30 inHg
Wind6.6 mph S
Humidity52%
Visibility—
Dew point31°
Sun, 2558° / 40°0Overcast
58 °Overcast

Alton, Sunday, 25 October

Overcast. High 58°, low 40°.

Pressure30.18 inHg
Wind10.6 mph S
Humidity46%
Visibility—
Dew point32°

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.