Castle Rock weather in March: Castle Rock, Colorado: normal highs, lows, rain and records for March
Castle Rock in March has a normal high of 54°F and a normal low of 27°F, a daily mean of 40°F, rising from 50°F on the 1st to 57°F by the 31st. Measurable precipitation falls on 5 days in a normal March, 1.54 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 12°C and low of −3°C, 39 mm of precipitation and 27 cm of snow in March.
- 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 March?
The normal high is 54°F and the normal low 27°F, for a daily mean of 40.2°F. March is 6.9°F warmer than February and 5.6°F cooler than April. March is the 8th warmest month of the year in Castle Rock and the 6th wettest, and the snowiest. Across the month the normal high rises 7°F, from 50°F on March 1 to 57°F on March 31. From one year to the next March's mean temperature typically moves about 2.8°F either way (NOAA's standard deviation), so roughly two Marchs in three average between 37°F and 43°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 18%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| March 1 | 50°F | 23°F | 16% | 10% |
| March 8 | 52°F | 25°F | 16% | 10% |
| March 15 | 54°F | 27°F | 16% | 11% |
| March 22 | 56°F | 28°F | 17% | 12% |
| March 31 | 57°F | 30°F | 18% | 13% |
Every day of March: normal high, low and chance of precipitation (warmest afternoon March 31, coldest night March 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| March 1 | 50°F | 23°F | 16% | 10% | 11 h 20 min |
| March 2 | 50°F | 23°F | 16% | 10% | 11 h 20 min |
| March 3 | 50°F | 23°F | 16% | 10% | 11 h 20 min |
| March 4 | 51°F | 24°F | 16% | 10% | 11 h 20 min |
| March 5 | 51°F | 24°F | 16% | 10% | 11 h 30 min |
| March 6 | 51°F | 24°F | 16% | 10% | 11 h 30 min |
| March 7 | 52°F | 24°F | 16% | 10% | 11 h 30 min |
| March 8 | 52°F | 25°F | 16% | 10% | 11 h 30 min |
| March 9 | 52°F | 25°F | 16% | 10% | 11 h 40 min |
| March 10 | 53°F | 25°F | 16% | 10% | 11 h 40 min |
| March 11 | 53°F | 26°F | 16% | 10% | 11 h 40 min |
| March 12 | 53°F | 26°F | 16% | 10% | 11 h 40 min |
| March 13 | 53°F | 26°F | 16% | 10% | 11 h 50 min |
| March 14 | 54°F | 26°F | 16% | 11% | 11 h 50 min |
| March 15 | 54°F | 27°F | 16% | 11% | 11 h 50 min |
| March 16 | 54°F | 27°F | 16% | 11% | 12 h |
| March 17 | 54°F | 27°F | 16% | 11% | 12 h |
| March 18 | 55°F | 27°F | 16% | 11% | 12 h |
| March 19 | 55°F | 27°F | 16% | 11% | 12 h |
| March 20 | 55°F | 28°F | 17% | 11% | 12 h 10 min |
| March 21 | 55°F | 28°F | 17% | 12% | 12 h 10 min |
| March 22 | 56°F | 28°F | 17% | 12% | 12 h 10 min |
| March 23 | 56°F | 28°F | 17% | 12% | 12 h 10 min |
| March 24 | 56°F | 28°F | 17% | 12% | 12 h 20 min |
| March 25 | 56°F | 29°F | 17% | 12% | 12 h 20 min |
| March 26 | 56°F | 29°F | 17% | 12% | 12 h 20 min |
| March 27 | 56°F | 29°F | 18% | 12% | 12 h 20 min |
| March 28 | 57°F | 29°F | 18% | 13% | 12 h 30 min |
| March 29 | 57°F | 29°F | 18% | 13% | 12 h 30 min |
| March 30 | 57°F | 29°F | 18% | 13% | 12 h 30 min |
| March 31 | 57°F | 30°F | 18% | 13% | 12 h 30 min |
- Normal high
- 54°FMarch average
- Normal low
- 27°FMarch average
- Precipitation
- 1.54 inmonth total
- Days with precipitation
- 50.01 inch or more
- Snowfall
- 10.7 inmonth total
- Nights at 32°F or colder
- 24
- Daylight
- 11 h 20 min to 12 h 30 minMarch 1 to March 31
- Days at 70°F or more
- 3
- Sunshine
- 78%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 March?
On a given March day the chance of 0.01 inch or more is 16% on average, highest around March 31 (18%). In all, 1.54 in falls on 5 days of a normal March.
In a normal March in Castle Rock, 24 nights fall to freezing, 2 days stay below freezing all day and snowfall averages 10.7 inches.
Snow falls on 3 days in a normal March, and an inch or more covers the ground on 5 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00051401.
What are the records for March in Castle Rock?
The warmest March temperature on this station's record (since 1893) is 82°F, on March 28, 2022; the coldest is −20°F, on March 19, 1906. The wettest March brought 7.08 in (2003); the snowiest, 50.0 inches (1983).
The March mean against the 1991-2020 normal of 40.2°F: 2021 43.0°F (+2.8), 2022 44.2°F (+4.0), 2023 35.5°F (−4.7), 2024 39.3°F (−0.9), 2025 45.2°F (+5.0). 3 of 5 ran warmer than normal.
| March | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 43.0°F | +2.8°F | 3.42 in |
| 2022 | 44.2°F | +4.0°F | 1.69 in |
| 2023 | 35.5°F | −4.7°F | 0.54 in |
| 2024 | 39.3°F | −0.9°F | 3.36 in |
| 2025 | 45.2°F | +5.0°F | 1.61 in |
Source: records: ACIS, station USC00051401; recent months: ACIS, station USC00051401. Records and recent months use complete months only.
How does March in Castle Rock compare across Colorado?
Across the 125 places PlainClimate covers in Colorado, March normal highs run from 37°F in Leadville to 63°F in Rocky Ford; Castle Rock's is 54°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.