Weather in Castle Rock, CO
Castle Rock, Sunday, 18 October, 06:25
Partly cloudy. Feels like 48°. High 73°, low 45°.
Monthly outlook for Castle Rock, CO: average high 68°, average low 43.3°. That is 5.3° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 21 October (74.6°), the coolest 25 October (37.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 67.1° | 60.8° | +3.5° |
| 28 October – 6 November | 69.4° | 54.2° | +8.4° |
| 7 November – 16 November | at normal | 51.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Stonegate (11 mi).
0
Castle Rock, Monday, 19 October
Clear. High 67°, low 43°.
0Castle Rock, Tuesday, 20 October
Clear. High 71°, low 40°.
0
Castle Rock, Wednesday, 21 October
Overcast. High 75°, low 42°.
0Castle Rock, Thursday, 22 October
Overcast. High 74°, low 53°.
0
Castle Rock, Friday, 23 October
Mostly clear. High 72°, low 54°.
0Castle Rock, Saturday, 24 October
Overcast. High 49°, low 41°.
0Castle Rock, Sunday, 25 October
Overcast. High 60°, low 37°.
0Castle Rock, Monday, 26 October
Overcast. High 64°, low 43°.
0Castle Rock, Tuesday, 27 October
Overcast. High 67°, low 43°.
0Castle Rock, Wednesday, 28 October
Clear. High 68°, low 43°.
0
Castle Rock, Thursday, 29 October
Partly cloudy. High 66°, low 45°.
0Castle Rock, Friday, 30 October
Clear. High 66°, low 40°.
0Castle Rock, Saturday, 31 October
Partly cloudy. High 69°, low 40°.
0Castle Rock, Sunday, 1 November
Mostly clear. High 74°, low 41°.
0Castle Rock, Monday, 2 November
Partly cloudy. High 73°, low 44°.
0.04Castle Rock, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.02Castle Rock, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.02Castle Rock, Thursday, 5 November
Climate normal for this date — 60-year average.
0.03Castle 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.
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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