Castle Rock weather in October: Castle Rock, Colorado: normal highs, lows, rain and records for October
Castle Rock in October has a normal high of 65°F and a normal low of 35°F, a daily mean of 50°F, falling from 71°F on the 1st to 60°F by the 31st. Measurable precipitation falls on 4 days in a normal October, 0.85 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 18°C and low of 1°C, 22 mm of precipitation and 7 cm of snow in October.
- NOAA stationCastle Rock
- Station IDUSC00051401
- Location39.41°N 104.91°W
- Elevation6,185 ft (1,885 m)
- Population83,213
- Jan 46° 18°
- Feb 47° 20°
- Mar 54° 27°
- Apr 59° 33°
- May 68° 42°
- Jun 80° 51°
- Jul 86° 56°
- Aug 84° 55°
- Sep 77° 47°
- Oct 65° 35°
- Nov 54° 26°
- Dec 46° 18°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Castle Rock in October?
The normal high is 65°F and the normal low 35°F, for a daily mean of 49.7°F. October is 12.0°F cooler than September and 9.9°F warmer than November. October is the 6th warmest month of the year in Castle Rock and the 8th wettest. Across the month the normal high falls 11°F, from 71°F on October 1 to 60°F on October 31. From one year to the next October's mean temperature typically moves about 3.1°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 47°F and 53°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 16%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 71°F | 40°F | 16% | 9% |
| October 8 | 68°F | 37°F | 15% | 9% |
| October 15 | 65°F | 35°F | 14% | 8% |
| October 22 | 63°F | 33°F | 14% | 8% |
| October 31 | 60°F | 30°F | 14% | 8% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 71°F | 40°F | 16% | 9% | 11 h 50 min |
| October 2 | 70°F | 40°F | 16% | 9% | 11 h 50 min |
| October 3 | 70°F | 39°F | 16% | 9% | 11 h 40 min |
| October 4 | 69°F | 39°F | 15% | 9% | 11 h 40 min |
| October 5 | 69°F | 38°F | 15% | 9% | 11 h 40 min |
| October 6 | 69°F | 38°F | 15% | 9% | 11 h 40 min |
| October 7 | 68°F | 38°F | 15% | 9% | 11 h 30 min |
| October 8 | 68°F | 37°F | 15% | 9% | 11 h 30 min |
| October 9 | 67°F | 37°F | 15% | 9% | 11 h 30 min |
| October 10 | 67°F | 36°F | 15% | 9% | 11 h 30 min |
| October 11 | 67°F | 36°F | 14% | 9% | 11 h 20 min |
| October 12 | 66°F | 36°F | 14% | 9% | 11 h 20 min |
| October 13 | 66°F | 35°F | 14% | 9% | 11 h 20 min |
| October 14 | 65°F | 35°F | 14% | 9% | 11 h 20 min |
| October 15 | 65°F | 35°F | 14% | 8% | 11 h 10 min |
| October 16 | 65°F | 34°F | 14% | 8% | 11 h 10 min |
| October 17 | 64°F | 34°F | 14% | 8% | 11 h 10 min |
| October 18 | 64°F | 34°F | 14% | 8% | 11 h 10 min |
| October 19 | 64°F | 33°F | 14% | 8% | 11 h |
| October 20 | 63°F | 33°F | 14% | 8% | 11 h |
| October 21 | 63°F | 33°F | 14% | 8% | 11 h |
| October 22 | 63°F | 33°F | 14% | 8% | 11 h |
| October 23 | 62°F | 32°F | 14% | 8% | 10 h 50 min |
| October 24 | 62°F | 32°F | 14% | 8% | 10 h 50 min |
| October 25 | 62°F | 32°F | 14% | 8% | 10 h 50 min |
| October 26 | 61°F | 32°F | 14% | 8% | 10 h 50 min |
| October 27 | 61°F | 31°F | 14% | 8% | 10 h 40 min |
| October 28 | 61°F | 31°F | 14% | 8% | 10 h 40 min |
| October 29 | 60°F | 31°F | 14% | 8% | 10 h 40 min |
| October 30 | 60°F | 31°F | 14% | 8% | 10 h 40 min |
| October 31 | 60°F | 30°F | 14% | 8% | 10 h 40 min |
- Normal high
- 65°FOctober average
- Normal low
- 35°FOctober average
- Precipitation
- 0.85 inmonth total
- Days with precipitation
- 40.01 inch or more
- Snowfall
- 2.7 inmonth total
- Nights at 32°F or colder
- 12
- Daylight
- 11 h 50 min to 10 h 40 minOctober 1 to October 31
- Days at 70°F or more
- 13
- Days at 80°F or more
- 3
- Sunshine
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00051401; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Castle Rock in October?
On a given October day the chance of 0.01 inch or more is 14% on average, highest around October 1 (16%). In all, 0.85 in falls on 4 days of a normal October.
In a normal October in Castle Rock, 12 nights fall to freezing, 1 days stay below freezing all day and snowfall averages 2.7 inches.
Snow falls on 1 day in a normal October, and an inch or more covers the ground on 2 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00051401.
What are the records for October in Castle Rock?
The warmest October temperature on this station's record (since 1893) is 88°F, on October 8, 2020; the coldest is −5°F, on October 26, 1913. The wettest October brought 5.43 in (1923); the snowiest, 48.5 inches (1969).
The October mean against the 1991-2020 normal of 49.7°F: 2021 57.5°F (+7.8), 2022 50.7°F (+1.0), 2023 50.5°F (+0.8), 2024 57.7°F (+8.0). 4 of 4 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 57.5°F | +7.8°F | 0.47 in |
| 2022 | 50.7°F | +1.0°F | 0.68 in |
| 2023 | 50.5°F | +0.8°F | 0.94 in |
| 2024 | 57.7°F | +8.0°F | 0.14 in |
Source: records: ACIS, station USC00051401; recent months: ACIS, station USC00051401. Records and recent months use complete months only.
How does October in Castle Rock compare across Colorado?
Across the 125 places PlainClimate covers in Colorado, October normal highs run from 50°F in Leadville to 72°F in Rocky Ford; Castle Rock's is 65°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Castle Rock in September77°F by day, 47°F at night
- Castle Rock in November54°F by day, 26°F at night
- Castle Rock through the yearEvery month, frost dates, records and recent years
- Colorado in OctoberThe statewide normal and the warmest and coolest places
- Rocky Ford: Colorado's warmest Octobernormal high 72°F