EN
English Español

As of 17:09 PDT

Weather in Alton, CA

65°Current weather

Alton, Wednesday, 14 October, 17:09

Clear. Feels like 63°. High 73°, low 44°.

Pressure30.12 inHg
Wind9.2 mph NW
Humidity55%
Visibility6.2 mi
Dew point50°
Thu, 1583° / 48°0Clear
83 °Clear

Alton, Thursday, 15 October

Clear. High 83°, low 48°.

Pressure30.15 inHg
Wind0.4 mph E
Humidity40%
Visibility6.2 mi
Dew point54°
Fri, 1666° / 48°0Partly cloudy
66 °Partly cloudy

Alton, Friday, 16 October

Partly cloudy. High 66°, low 48°.

Pressure30.15 inHg
Wind5.5 mph NW
Humidity65%
Visibility6.2 mi
Dew point53°
Sat, 1761° / 49°0Partly cloudy
61 °Partly cloudy

Alton, Saturday, 17 October

Partly cloudy. High 61°, low 49°.

Pressure30.18 inHg
Wind4.7 mph NW
Humidity79%
Visibility1.2 mi
Dew point53°
Sun, 1856° / 51°0Overcast
56 °Overcast

Alton, Sunday, 18 October

Overcast. High 56°, low 51°.

Pressure30.03 inHg
Wind4.2 mph W
Humidity91%
Visibility4.4 mi
Dew point52°
Mon, 1958° / 45°0.05Light rain
58 °Light rain

Alton, Monday, 19 October

Light rain. High 58°, low 45°.

Pressure30.03 inHg
Wind5.7 mph SE
Humidity70%
Visibility—
Dew point46°
Tue, 2065° / 47°0Clear
65 °Clear

Alton, Tuesday, 20 October

Clear. High 65°, low 47°.

Pressure29.88 inHg
Wind8.6 mph NW
Humidity45%
Visibility—
Dew point41°
Wed, 2166° / 47°0Clear
66 °Clear

Alton, Wednesday, 21 October

Clear. High 66°, low 47°.

Pressure29.88 inHg
Wind8 mph NW
Humidity40%
Visibility—
Dew point39°
Thu, 2263° / 45°0Clear
63 °Clear

Alton, Thursday, 22 October

Clear. High 63°, low 45°.

Pressure29.91 inHg
Wind8.5 mph NW
Humidity47%
Visibility—
Dew point40°
Fri, 2369° / 49°0Clear
69 °Clear

Alton, Friday, 23 October

Clear. High 69°, low 49°.

Pressure30.12 inHg
Wind6.7 mph NW
Humidity37%
Visibility—
Dew point39°
Sat, 2476° / 55°0Clear
76 °Clear

Alton, Saturday, 24 October

Clear. High 76°, low 55°.

Pressure30.21 inHg
Wind6.3 mph NW
Humidity22%
Visibility—
Dew point31°
Sun, 2575° / 50°0Mostly clear
75 °Mostly clear

Alton, Sunday, 25 October

Mostly clear. High 75°, low 50°.

Pressure30.18 inHg
Wind7 mph N
Humidity31%
Visibility—
Dew point37°
Mon, 2670° / 49°0Overcast
70 °Overcast

Alton, Monday, 26 October

Overcast. High 70°, low 49°.

Pressure30.06 inHg
Wind7.6 mph NW
Humidity35%
Visibility—
Dew point39°
Tue, 2772° / 51°0Overcast
72 °Overcast

Alton, Tuesday, 27 October

Overcast. High 72°, low 51°.

Pressure29.94 inHg
Wind5.9 mph NW
Humidity35%
Visibility—
Dew point40°
Wed, 2866° / 49°0Overcast
66 °Overcast

Alton, Wednesday, 28 October

Overcast. High 66°, low 49°.

Pressure29.88 inHg
Wind7.2 mph NW
Humidity55%
Visibility—
Dew point47°
Thu, 2969° / 52°0Overcast
69 °Overcast

Alton, Thursday, 29 October

Overcast. High 69°, low 52°.

Pressure29.88 inHg
Wind7 mph NW
Humidity62%
Visibility—
Dew point53°

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, CA 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, CA 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.