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As of 14:46 CDT

Weather in Alton, IA

59°Current weather

Alton, Saturday, 17 October, 14:46

Clear. Feels like 57°. High 59°, low 33°.

Pressure30.30 inHg
Wind16.6 mph S
Humidity45%
Visibility6.2 mi
Dew point38°
Sun, 1863° / 43°0Clear
63 °Clear

Alton, Sunday, 18 October

Clear. High 63°, low 43°.

Pressure30.15 inHg
Wind13.3 mph S
Humidity56%
Visibility6.2 mi
Dew point40°
Mon, 1962° / 43°0Overcast
62 °Overcast

Alton, Monday, 19 October

Overcast. High 62°, low 43°.

Pressure30.27 inHg
Wind8.1 mph S
Humidity70%
Visibility6.2 mi
Dew point46°
Tue, 2066° / 47°0Partly cloudy
66 °Partly cloudy

Alton, Tuesday, 20 October

Partly cloudy. High 66°, low 47°.

Pressure30.24 inHg
Wind10.7 mph S
Humidity63%
Visibility6.2 mi
Dew point48°
Wed, 2169° / 51°0Clear
69 °Clear

Alton, Wednesday, 21 October

Clear. High 69°, low 51°.

Pressure30.15 inHg
Wind7.1 mph S
Humidity67%
Visibility6.2 mi
Dew point52°
Thu, 2272° / 49°0Clear
72 °Clear

Alton, Thursday, 22 October

Clear. High 72°, low 49°.

Pressure30.18 inHg
Wind8.1 mph SE
Humidity61%
Visibility—
Dew point53°
Fri, 2376° / 58°0.08Light rain
76 °Light rain

Alton, Friday, 23 October

Light rain. High 76°, low 58°.

Pressure29.85 inHg
Wind20.9 mph S
Humidity68%
Visibility—
Dew point60°
Sat, 2475° / 50°0.01Light rain
75 °Light rain

Alton, Saturday, 24 October

Light rain. High 75°, low 50°.

Pressure29.77 inHg
Wind21.7 mph S
Humidity44%
Visibility—
Dew point49°
Sun, 2560° / 49°0Partly cloudy
60 °Partly cloudy

Alton, Sunday, 25 October

Partly cloudy. High 60°, low 49°.

Pressure30.12 inHg
Wind18.4 mph W
Humidity49%
Visibility—
Dew point38°
Mon, 2666° / 46°0.13Light rain
66 °Light rain

Alton, Monday, 26 October

Light rain. High 66°, low 46°.

Pressure29.97 inHg
Wind26.4 mph S
Humidity51%
Visibility—
Dew point43°
Tue, 2773° / 60°0.17Light rain
73 °Light rain

Alton, Tuesday, 27 October

Light rain. High 73°, low 60°.

Pressure29.74 inHg
Wind20.4 mph SW
Humidity51%
Visibility—
Dew point50°
Wed, 2864° / 50°0.04Light rain
64 °Light rain

Alton, Wednesday, 28 October

Light rain. High 64°, low 50°.

Pressure29.77 inHg
Wind16.6 mph NW
Humidity43%
Visibility—
Dew point40°
Thu, 2959° / 43°0Overcast
59 °Overcast

Alton, Thursday, 29 October

Overcast. High 59°, low 43°.

Pressure29.97 inHg
Wind16.3 mph S
Humidity29%
Visibility—
Dew point24°
Fri, 3068° / 49°0.23Light rain
68 °Light rain

Alton, Friday, 30 October

Light rain. High 68°, low 49°.

Pressure29.38 inHg
Wind25.5 mph S
Humidity93%
Visibility—
Dew point54°
Sat, 3148° / 37°0.01Snow
48 °Snow

Alton, Saturday, 31 October

Snow. High 48°, low 37°.

Pressure29.71 inHg
Wind27.9 mph W
Humidity50%
Visibility—
Dew point28°
Sun, 0157° / 40°0Overcast
57 °Overcast

Alton, Sunday, 1 November

Overcast. High 57°, low 40°.

Pressure30.03 inHg
Wind14.3 mph S
Humidity43%
Visibility—
Dew point31°

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.