Weather in Castle Rock, CO
Castle Rock, Tuesday, 20 October, 08:12
Overcast. Feels like 49°. High 67°, low 46°.
Monthly outlook for Castle Rock, CO: average high 59.9°, average low 42.4°. That is 1.4° above the climate normal for October. Precipitation is expected on 6 days (about 0.7 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 23 October (76.1°), the coolest 27 October (33.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 60° | 59.8° | +0.1° |
| 30 October – 8 November | 59.7° | 53.7° | +3.3° |
| 9 November – 18 November | at normal | 50.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Stonegate (11 mi).
0
Castle Rock, Wednesday, 21 October
Partly cloudy. High 71°, low 46°.
0.06
Castle Rock, Thursday, 22 October
Light rain. High 72°, low 51°.
0
Castle Rock, Friday, 23 October
Clear. High 76°, low 57°.
0.21Castle Rock, Saturday, 24 October
Light rain. High 52°, low 44°.
0.26Castle Rock, Sunday, 25 October
Rain. High 57°, low 44°.
0.04
Castle Rock, Monday, 26 October
Snow. High 44°, low 36°.
0.07Castle Rock, Tuesday, 27 October
Light snow. High 45°, low 33°.
0Castle Rock, Wednesday, 28 October
Clear. High 60°, low 37°.
0Castle Rock, Thursday, 29 October
Overcast. High 55°, low 37°.
0Castle Rock, Friday, 30 October
Overcast. High 55°, low 38°.
0Castle Rock, Saturday, 31 October
Clear. High 63°, low 41°.
0Castle Rock, Sunday, 1 November
Overcast. High 62°, low 43°.
0Castle Rock, Monday, 2 November
Overcast. High 63°, low 42°.
0
Castle Rock, Tuesday, 3 November
Mostly clear. High 61°, low 43°.
0.04Castle Rock, Wednesday, 4 November
Light rain. High 55°, low 41°.
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.
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.
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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