EN
English Español

As of 08:08 CDT

Weather in Alton, IA

61°Current weather

Alton, Sunday, 11 October, 08:08

Clear. Feels like 61°. High 85°, low 61°.

Pressure29.74 inHg
Wind10.7 mph S
Humidity74%
Visibility6.2 mi
Dew point53°
Mon, 1288° / 64°0Clear
88 °Clear

Alton, Monday, 12 October

Clear. High 88°, low 64°.

Pressure29.62 inHg
Wind11.5 mph S
Humidity49%
Visibility6.2 mi
Dew point59°
Tue, 1365° / 53°0Overcast
65 °Overcast

Alton, Tuesday, 13 October

Overcast. High 65°, low 53°.

Pressure29.94 inHg
Wind7.6 mph N
Humidity60%
Visibility6.2 mi
Dew point49°
Wed, 1462° / 47°0Clear
62 °Clear

Alton, Wednesday, 14 October

Clear. High 62°, low 47°.

Pressure30.18 inHg
Wind9.3 mph NE
Humidity53%
Visibility6.2 mi
Dew point40°
Thu, 1557° / 51°0.41Rain
57 °Rain

Alton, Thursday, 15 October

Rain. High 57°, low 51°.

Pressure30.18 inHg
Wind12.3 mph N
Humidity90%
Visibility—
Dew point52°
Fri, 1656° / 40°0Clear
56 °Clear

Alton, Friday, 16 October

Clear. High 56°, low 40°.

Pressure30.68 inHg
Wind15.2 mph N
Humidity48%
Visibility—
Dew point33°
Sat, 1743° / 26°0Clear
43 °Clear

Alton, Saturday, 17 October

Clear. High 43°, low 26°.

Pressure30.65 inHg
Wind14.7 mph N
Humidity31%
Visibility—
Dew point10°
Sun, 1855° / 32°0Partly cloudy
55 °Partly cloudy

Alton, Sunday, 18 October

Partly cloudy. High 55°, low 32°.

Pressure30.24 inHg
Wind23.3 mph S
Humidity32%
Visibility—
Dew point19°
Mon, 1967° / 40°0Clear
67 °Clear

Alton, Monday, 19 October

Clear. High 67°, low 40°.

Pressure30.03 inHg
Wind13 mph S
Humidity37%
Visibility—
Dew point33°
Tue, 2067° / 45°0Clear
67 °Clear

Alton, Tuesday, 20 October

Clear. High 67°, low 45°.

Pressure29.88 inHg
Wind16.8 mph S
Humidity37%
Visibility—
Dew point35°
Wed, 2165° / 50°0Overcast
65 °Overcast

Alton, Wednesday, 21 October

Overcast. High 65°, low 50°.

Pressure30.06 inHg
Wind9.8 mph N
Humidity28%
Visibility—
Dew point29°
Thu, 2264° / 45°0Clear
64 °Clear

Alton, Thursday, 22 October

Clear. High 64°, low 45°.

Pressure30.36 inHg
Wind12.2 mph SE
Humidity39%
Visibility—
Dew point34°
Fri, 2377° / 55°0.09Light rain
77 °Light rain

Alton, Friday, 23 October

Light rain. High 77°, low 55°.

Pressure29.85 inHg
Wind23.8 mph SW
Humidity66%
Visibility—
Dew point57°
Sat, 2457° / 44°0Partly cloudy
57 °Partly cloudy

Alton, Saturday, 24 October

Partly cloudy. High 57°, low 44°.

Pressure30.30 inHg
Wind17.7 mph NW
Humidity37%
Visibility—
Dew point28°
Sun, 2558° / 37°0Mostly clear
58 °Mostly clear

Alton, Sunday, 25 October

Mostly clear. High 58°, low 37°.

Pressure30.39 inHg
Wind11.9 mph W
Humidity43%
Visibility—
Dew point29°
Mon, 2656° / 40°0Mostly clear
56 °Mostly clear

Alton, Monday, 26 October

Mostly clear. High 56°, low 40°.

Pressure30.27 inHg
Wind10.5 mph N
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.