Weather in Alton, ID
Alton, Saturday, 10 October, 05:42
Mostly clear. Feels like 57°. High 65°, low 48°.
Monthly outlook for Alton, ID: average high 55.7°, average low 38.3°. That is 1.1° above the climate normal for October. Precipitation is expected on 5 days (about 1.8 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 19 October (65.8°), the coolest 22 October (29.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 10 October – 19 October | 56.4° | 55.1° | +0.7° |
| 20 October – 29 October | 54.6° | 50.3° | +2.3° |
| 30 October – 8 November | at normal | 44° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Marse (10 mi).
0.47
Alton, Sunday, 11 October
Rain. High 57°, low 43°.
0.19Alton, Monday, 12 October
Rain. High 52°, low 40°.
0.38Alton, Tuesday, 13 October
Rain. High 54°, low 37°.
0.53Alton, Wednesday, 14 October
Rain. High 46°, low 37°.
0.03Alton, Thursday, 15 October
Light rain. High 51°, low 38°.
0
Alton, Friday, 16 October
Clear. High 52°, low 35°.
0Alton, Saturday, 17 October
Clear. High 57°, low 34°.
0Alton, Sunday, 18 October
Clear. High 64°, low 40°.
0
Alton, Monday, 19 October
Partly cloudy. High 66°, low 42°.
0
Alton, Tuesday, 20 October
Overcast. High 65°, low 43°.
0.03Alton, Wednesday, 21 October
Light rain. High 52°, low 37°.
0Alton, Thursday, 22 October
Overcast. High 51°, low 30°.
0Alton, Friday, 23 October
Overcast. High 52°, low 37°.
0Alton, Saturday, 24 October
Overcast. High 50°, low 35°.
0.03Alton, Sunday, 25 October
Light rain. High 57°, low 37°.
0.07Alton, Monday, 26 October
Climate normal for this date — 60-year average.
0.04Alton, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.06Alton, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.06
Alton, Thursday, 29 October
Climate normal for this date — 60-year average.
0.07Alton, Friday, 30 October
Climate normal for this date — 60-year average.
0.07Alton, Saturday, 31 October
Climate normal for this date — 60-year average.
0.05Alton, Sunday, 1 November
Climate normal for this date — 60-year average.
0.05Alton, Monday, 2 November
Climate normal for this date — 60-year average.
0.04
Alton, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04Alton, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.05Alton, Thursday, 5 November
Climate normal for this date — 60-year average.
0.05Alton, Friday, 6 November
Climate normal for this date — 60-year average.
0.08Alton, Saturday, 7 November
Climate normal for this date — 60-year average.
0.08Alton, Sunday, 8 November
Climate normal for this date — 60-year average.
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, ID 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, ID 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.
Sun and moon today
Weather history
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