Weather in Castle Rock, CO
Castle Rock, Wednesday, 21 October, 15:45
Overcast. Feels like 68°. High 70°, low 45°.
Monthly outlook for Castle Rock, CO: average high 59.3°, average low 42.5°. That is 1.5° above the climate normal for October. Precipitation is expected on 6 days (about 0.7 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 23 October (76.1°), the coolest 27 October (35°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 62.9° | 58.9° | +2.3° |
| 31 October – 9 November | 53.3° | 53.6° | -0.1° |
| 10 November – 19 November | at normal | 50.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Stonegate (11 mi).
0Castle Rock, Thursday, 22 October
Overcast. High 70°, low 52°.
0
Castle Rock, Friday, 23 October
Clear. High 76°, low 56°.
0.04
Castle Rock, Saturday, 24 October
Light rain. High 54°, low 43°.
0.09Castle Rock, Sunday, 25 October
Light rain. High 62°, low 42°.
0.13Castle Rock, Monday, 26 October
Light rain. High 53°, low 41°.
0Castle Rock, Tuesday, 27 October
Overcast. High 63°, low 35°.
0
Castle Rock, Wednesday, 28 October
Partly cloudy. High 56°, low 38°.
0Castle Rock, Thursday, 29 October
Overcast. High 61°, low 39°.
0Castle Rock, Friday, 30 October
Overcast. High 64°, low 43°.
0.17Castle Rock, Saturday, 31 October
Rain. High 56°, low 44°.
0.21Castle Rock, Sunday, 1 November
Rain. High 45°, low 43°.
0.04Castle Rock, Monday, 2 November
Light rain. High 51°, low 40°.
0.04Castle Rock, Tuesday, 3 November
Light rain. High 47°, low 40°.
0Castle Rock, Wednesday, 4 November
Clear. High 59°, low 38°.
0Castle Rock, Thursday, 5 November
Overcast. High 62°, low 41°.
0.03
Castle Rock, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Castle Rock, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Castle Rock, Sunday, 8 November
Climate normal for this date — 60-year average.
0.05Castle Rock, Monday, 9 November
Climate normal for this date — 60-year average.
0.03Castle Rock, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.03Castle Rock, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.04Castle Rock, Thursday, 12 November
Climate normal for this date — 60-year average.
0.02Castle Rock, Friday, 13 November
Climate normal for this date — 60-year average.
0.04Castle Rock, Saturday, 14 November
Climate normal for this date — 60-year average.
0.04Castle Rock, Sunday, 15 November
Climate normal for this date — 60-year average.
0.02Castle Rock, Monday, 16 November
Climate normal for this date — 60-year average.
0.04Castle Rock, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.02Castle Rock, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.04Castle Rock, 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 Castle Rock, 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 Castle Rock, 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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