Weather in Altona, CO
Altona, Friday, 16 October, 12:59
Clear. Feels like 48°. High 52°, low 29°.
Monthly outlook for Altona, CO: average high 54.1°, average low 36.8°. That is 2.7° below the climate normal for October. Precipitation is expected on 5 days (about 4.7 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 17 October (69.7°), the coolest 26 October (27.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 16 October – 25 October | 59.6° | 61° | -0.8° |
| 26 October – 4 November | 45° | 54° | -5° |
| 5 November – 14 November | at normal | 51.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Boulder (7 mi).
0Altona, Saturday, 17 October
Clear. High 70°, low 35°.
0
Altona, Sunday, 18 October
Overcast. High 66°, low 34°.
0.04
Altona, Monday, 19 October
Light rain. High 59°, low 43°.
0Altona, Tuesday, 20 October
Light rain. High 62°, low 39°.
0
Altona, Wednesday, 21 October
Mostly clear. High 64°, low 41°.
0
Altona, Thursday, 22 October
Partly cloudy. High 67°, low 45°.
0Altona, Friday, 23 October
Partly cloudy. High 65°, low 49°.
0.14Altona, Saturday, 24 October
Light rain. High 54°, low 41°.
0.52
Altona, Sunday, 25 October
Snow. High 37°, low 31°.
0.01Altona, Monday, 26 October
Light snow. High 41°, low 28°.
0Altona, Tuesday, 27 October
Overcast. High 50°, low 33°.
0.04Altona, Wednesday, 28 October
Light rain. High 53°, low 40°.
0Altona, Thursday, 29 October
Overcast. High 51°, low 38°.
2.1Altona, Friday, 30 October
Snow. High 43°, low 32°.
1.85Altona, Saturday, 31 October
Snow. High 33°, low 31°.
0.07
Altona, Sunday, 1 November
Climate normal for this date — 60-year average.
0.08Altona, Monday, 2 November
Climate normal for this date — 60-year average.
0.06Altona, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04Altona, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.03Altona, Thursday, 5 November
Climate normal for this date — 60-year average.
0.04Altona, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Altona, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06Altona, Sunday, 8 November
Climate normal for this date — 60-year average.
0.08Altona, Monday, 9 November
Climate normal for this date — 60-year average.
0.04Altona, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.04Altona, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.04Altona, Thursday, 12 November
Climate normal for this date — 60-year average.
0.04Altona, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Altona, Saturday, 14 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 Altona, CO 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 Altona, CO 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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