Castle Rock weather in April: Castle Rock, Colorado: normal highs, lows, rain and records for April
Castle Rock in April has a normal high of 59°F and a normal low of 33°F, a daily mean of 46°F, rising from 57°F on the 1st to 62°F by the 30th. Measurable precipitation falls on 6 days in a normal April, 2.08 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 15°C and low of 0°C, 53 mm of precipitation and 21 cm of snow in April.
- 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 April?
The normal high is 59°F and the normal low 33°F, for a daily mean of 45.8°F. April is 5.6°F warmer than March and 9.2°F cooler than May. April is the 7th warmest month of the year in Castle Rock and the 4th wettest. Across the month the normal high rises 5°F, from 57°F on April 1 to 62°F on April 30. From one year to the next April's mean temperature typically moves about 2.9°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 43°F and 49°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 24%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| April 1 | 57°F | 30°F | 19% | 13% |
| April 8 | 58°F | 31°F | 20% | 14% |
| April 15 | 59°F | 32°F | 21% | 14% |
| April 22 | 60°F | 34°F | 23% | 14% |
| April 30 | 62°F | 36°F | 24% | 14% |
Every day of April: normal high, low and chance of precipitation (warmest afternoon April 30, coldest night April 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| April 1 | 57°F | 30°F | 19% | 13% | 12 h 40 min |
| April 2 | 57°F | 30°F | 19% | 13% | 12 h 40 min |
| April 3 | 57°F | 30°F | 19% | 13% | 12 h 40 min |
| April 4 | 57°F | 30°F | 19% | 13% | 12 h 40 min |
| April 5 | 58°F | 30°F | 19% | 13% | 12 h 50 min |
| April 6 | 58°F | 31°F | 19% | 13% | 12 h 50 min |
| April 7 | 58°F | 31°F | 20% | 14% | 12 h 50 min |
| April 8 | 58°F | 31°F | 20% | 14% | 12 h 50 min |
| April 9 | 58°F | 31°F | 20% | 14% | 13 h |
| April 10 | 58°F | 31°F | 20% | 14% | 13 h |
| April 11 | 58°F | 31°F | 20% | 14% | 13 h |
| April 12 | 58°F | 32°F | 21% | 14% | 13 h |
| April 13 | 58°F | 32°F | 21% | 14% | 13 h 10 min |
| April 14 | 59°F | 32°F | 21% | 14% | 13 h 10 min |
| April 15 | 59°F | 32°F | 21% | 14% | 13 h 10 min |
| April 16 | 59°F | 32°F | 22% | 14% | 13 h 10 min |
| April 17 | 59°F | 33°F | 22% | 14% | 13 h 20 min |
| April 18 | 59°F | 33°F | 22% | 14% | 13 h 20 min |
| April 19 | 59°F | 33°F | 22% | 14% | 13 h 20 min |
| April 20 | 60°F | 33°F | 22% | 14% | 13 h 20 min |
| April 21 | 60°F | 34°F | 23% | 14% | 13 h 30 min |
| April 22 | 60°F | 34°F | 23% | 14% | 13 h 30 min |
| April 23 | 60°F | 34°F | 23% | 14% | 13 h 30 min |
| April 24 | 61°F | 34°F | 23% | 14% | 13 h 30 min |
| April 25 | 61°F | 35°F | 23% | 14% | 13 h 40 min |
| April 26 | 61°F | 35°F | 24% | 14% | 13 h 40 min |
| April 27 | 61°F | 35°F | 24% | 14% | 13 h 40 min |
| April 28 | 62°F | 36°F | 24% | 14% | 13 h 40 min |
| April 29 | 62°F | 36°F | 24% | 14% | 13 h 50 min |
| April 30 | 62°F | 36°F | 24% | 14% | 13 h 50 min |
- Normal high
- 59°FApril average
- Normal low
- 33°FApril average
- Precipitation
- 2.08 inmonth total
- Days with precipitation
- 60.01 inch or more
- Snowfall
- 8.3 inmonth total
- Nights at 32°F or colder
- 17
- Daylight
- 12 h 40 min to 13 h 50 minApril 1 to April 30
- Days at 70°F or more
- 7
- Days at 80°F or more
- 1
- Sunshine
- 76%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 April?
On a given April day the chance of 0.01 inch or more is 21% on average, highest around April 30 (24%). In all, 2.08 in falls on 6 days of a normal April.
In a normal April in Castle Rock, 17 nights fall to freezing, 1 days stay below freezing all day and snowfall averages 8.3 inches.
Snow falls on 3 days in a normal April, and an inch or more covers the ground on 4 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00051401.
What are the records for April in Castle Rock?
The warmest April temperature on this station's record (since 1893) is 91°F, on April 27, 1981; the coldest is −8°F, on April 8, 1909. The wettest April brought 7.90 in (1900); the snowiest, 61.0 inches (1900).
The April mean against the 1991-2020 normal of 45.8°F: 2021 48.7°F (+2.9), 2022 54.0°F (+8.2), 2023 44.8°F (−1.0), 2024 48.0°F (+2.3), 2025 48.0°F (+2.2). 4 of 5 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 48.7°F | +2.9°F | 1.94 in |
| 2022 | 54.0°F | +8.2°F | 0.01 in |
| 2023 | 44.8°F | −1.0°F | 2.20 in |
| 2024 | 48.0°F | +2.3°F | 2.22 in |
| 2025 | 48.0°F | +2.2°F | 0.28 in |
Source: records: ACIS, station USC00051401; recent months: ACIS, station USC00051401. Records and recent months use complete months only.
How does April in Castle Rock compare across Colorado?
Across the 125 places PlainClimate covers in Colorado, April normal highs run from 43°F in Leadville to 71°F in Rocky Ford; Castle Rock's is 59°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.