Castle Rock in Spring
In spring (March, April and May), Castle Rock sees average daytime highs around 56°F and overnight lows near 30°F, with 7.4 in of precipitation over about 29 wet days across the season. It is the 3rd-warmest season and the wettest season of the year.
Over the season highs climb from about 46°F in early March to 70°F by late May. The sky is clear or mostly clear about 33% of the time across spring, and the air most often feels dry.
Spring is Castle Rock's 3rd-best season to visit on our travel score. For the whole year in context, see Castle Rock's year-round climate.
- Avg daytime high
- 56°F
- 3rd-warmest season
- Avg overnight low
- 30°F
- Precipitation
- 7.4 in
- 29 wet days
- Avg wind
- 6 mph
- Travel score
- 3.7
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Castle Rock in Spring
Over the season highs climb from about 46°F in early March to 70°F by late May.
A typical spring day in Castle Rock reaches about 56°F and drops to 30°F overnight. The warmest of the three months is May, the coolest March.
How spring really feels in Castle Rock
Once humidity and wind are folded in, spring brings about 0 days that feel above 90°F and 72 that feel at or below 32°F.
The story in spring is cold — wind chill drags the overnight "feels like" below the raw low.
Castle Rock weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 39° / 12° | 0.6 | 4.2 | 4.7 | 9.5 | 0.0 |
| Feb | 42° / 15° | 0.7 | 5 | 5.4 | 10.5 | 0.3 |
| Mar | 49° / 22° | 1.7 | 6.9 | 5.9 | 11.7 | 2.2 |
| Apr | 55° / 28° | 2.6 | 9.7 | 6.1 | 13 | 3.5 |
| May | 65° / 39° | 3.0 | 12.3 | 1.7 | 14.1 | 5.5 |
| Jun | 76° / 48° | 2.1 | 10.2 | 0.1 | 14.7 | 6.8 |
| Jul | 81° / 54° | 2.5 | 10.9 | 0 | 14.5 | 6.5 |
| Aug | 79° / 52° | 2.0 | 10.1 | 0 | 13.5 | 6.9 |
| Sep | 72° / 45° | 1.3 | 6.4 | 0.5 | 12.3 | 7.6 |
| Oct | 60° / 32° | 1.4 | 5.5 | 2.4 | 11 | 5.7 |
| Nov | 48° / 21° | 1.0 | 4.9 | 4.9 | 9.8 | 2.0 |
| Dec | 39° / 12° | 0.7 | 3.9 | 4.4 | 9.3 | 0.0 |
Cloud cover in Spring
The sky is clear or mostly clear about 33% of the time across spring.
Chance of precipitation in Spring
Castle Rock gets around 7.4 in of rain and snow over 29 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 6 mph across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 hours in early March to 14 h 30 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 6.2 kWh/m².
Is spring a good time to visit Castle Rock?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a weaker month for outdoor sightseeing in Castle Rock.
What to pack for Castle Rock in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Castle Rock sees daytime highs around 56°F and nights near 30°F. Pack a warm layer and sun protection. Worth having: a heavy coat and rain gear. About 29 days see rain.
UV index in Castle Rock in Spring
Clear-sky midday UV across spring averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Castle Rock peaks around July 15 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 4 | 7 | 7 | 8 | 11 | 11 | 10 | 8 | 6 | 4 | 2 |
| Level | Moderate | Moderate | Very high | High | Very high | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 4 | Moderate |
| Mar | 7 | Very high |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 10 | Extreme |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 2 | Moderate |
Where is Castle Rock?
Castle Rock sits at 39.4°N, 104.9°W, 6,224 ft above sea level, in United States. The nearest listed city is Parker, 11 mi away.
Topography around Castle Rock
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Castle Rock.
Within 2 miles, the terrain around Castle Rock has only modest variations in elevation — a maximum elevation change of 646 ft around an average of 6,368 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 2,028 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,268 ft.
The land around Castle Rock is covered by grassland (52%) and artificial surfaces (28%) within 2 miles, grassland (74%) within 10 miles, and grassland (55%) and trees (29%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Castle Rock (39.3722°, -104.8561°, elevation 6,224 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.