Weather in Altona, CO
Altona, Wednesday, 21 October, 22:58
Clear. Feels like 56°. High 69°, low 43°.
Monthly outlook for Altona, CO: average high 58.7°, average low 39.5°. That is 1.6° above the climate normal for October. Precipitation is expected on 2 days (about 0.4 inches), against a normal of 4 days and 0.9 inches. The warmest day looks like 23 October (71.1°), the coolest 27 October (30.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 58.4° | 58° | +0.2° |
| 31 October – 9 November | 59.3° | 52.6° | +3.7° |
| 10 November – 19 November | at normal | 49.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Boulder (7 mi).
0.01
Altona, Thursday, 22 October
Light rain. High 69°, low 48°.
0
Altona, Friday, 23 October
Mostly clear. High 71°, low 46°.
0Altona, Saturday, 24 October
Light rain. High 50°, low 39°.
0.04Altona, Sunday, 25 October
Light rain. High 51°, low 35°.
0.31Altona, Monday, 26 October
Light rain. High 42°, low 36°.
0Altona, Tuesday, 27 October
Mostly clear. High 59°, low 30°.
0.01
Altona, Wednesday, 28 October
Light snow. High 48°, low 31°.
0
Altona, Thursday, 29 October
Overcast. High 63°, low 37°.
0Altona, Friday, 30 October
Overcast. High 61°, low 47°.
0.01Altona, Saturday, 31 October
Light rain. High 59°, low 46°.
0
Altona, Sunday, 1 November
Clear. High 55°, low 35°.
0Altona, Monday, 2 November
Clear. High 57°, low 35°.
0Altona, Tuesday, 3 November
Overcast. High 61°, low 40°.
0Altona, Wednesday, 4 November
Overcast. High 60°, low 43°.
0Altona, Thursday, 5 November
Clear. High 65°, low 41°.
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.
0.06
Altona, 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.
0.05Altona, Sunday, 15 November
Climate normal for this date — 60-year average.
0.03Altona, Monday, 16 November
Climate normal for this date — 60-year average.
0.05Altona, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.03Altona, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.04Altona, Thursday, 19 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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