Castlewood in Spring

In spring (March, April and May), Castlewood sees average daytime highs around 57°F and overnight lows near 31°F, with 8.4 in of precipitation over about 30 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 71°F by late May. The sky is clear or mostly clear about 32% of the time across spring, and the air most often feels dry.

Spring is Castlewood's 3rd-best season to visit on our travel score. For the whole year in context, see Castlewood's year-round climate.

Avg daytime high: 57°F; 3rd-warmest season
Avg overnight low: 31°F
Precipitation: 8.4 in; 30 wet days
Avg wind: 5 mph
Travel score: 3.9; 3rd-best season
Months: Mar · Apr · May

← Winter Castlewood year-round climate Summer →

Spring Summer Fall Winter

Temperature in Castlewood in Spring

Average highAverage lowShaded bands: 10–90% of days

Over the season highs climb from about 46°F in early March to 71°F by late May.

A typical spring day in Castlewood reaches about 57°F and drops to 31°F overnight. The warmest of the three months is May, the coolest March.

How spring really feels in Castlewood

Once humidity and wind are folded in, spring brings about 0 days that feel above 90°F and 67 that feel at or below 32°F.

Days feeling ≥ 90°F

heat index over the day's high

Days feeling ≤ 32°F

6 feel bitter (≤ 14°F)

The story in spring is cold — wind chill drags the overnight "feels like" below the raw low.

Castlewood 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	40° / 14°	0.9	5.3	5.4	9.5	0.0
Feb	42° / 16°	0.9	5.7	5.8	10.4	0.3
Mar	50° / 23°	2.0	7.8	6.5	11.7	2.4
Apr	56° / 29°	3.0	10	6.2	13	3.7
May	66° / 40°	3.5	12.5	1.7	14.1	5.6
Jun	77° / 49°	2.3	9.7	0	14.7	6.9
Jul	83° / 55°	2.2	9.9	0	14.5	6.1
Aug	81° / 54°	1.9	9.4	0	13.6	6.8
Sep	74° / 46°	1.5	6.4	0.6	12.3	7.6
Oct	61° / 34°	1.7	6.3	2.8	10.9	5.9
Nov	48° / 23°	1.2	5.9	5.2	9.8	2.2
Dec	39° / 14°	0.9	4.8	5	9.3	0.0

Cloud cover in Spring

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time across spring.

Chance of precipitation in Spring

Any precipitationSnow

Castlewood gets around 8.4 in of rain and snow over 30 wet days across spring. The line is the day-by-day chance of measurable precipitation.

Humidity in Spring

DryComfortableHumidMuggyOppressiveMiserable

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 5 mph across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 hours in early March to 14 h 36 min by late May. The lit band spans sunrise to sunset each day.

Solar energy in Spring

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across spring, about 6.2 kWh/m².

Planning a trip in spring

Is spring a good time to visit Castlewood?

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.

3.9

Sightseeing

3rd-best month of the year

0.8

Beach & pool

3rd-best month of the year

spring is a weaker month for outdoor sightseeing in Castlewood.

What to pack for Castlewood in Spring

From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In spring, Castlewood sees daytime highs around 57°F and nights near 31°F. Pack a warm layer and sun protection. Worth having: a heavy coat and rain gear. About 30 days see rain.

a warm layersun protectiona heavy coatrain gear

UV index in Castlewood in Spring

LowModerateHighVery highExtreme

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 Castlewood peaks around July 13 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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)	2	4	7	6	8	11	11	10	7	5	4	2
Level	Moderate	Moderate	High	High	Very high	Extreme	Extreme	Very high	Very high	High	Moderate	Low

	UV index (midday)	Level
Jan	2	Moderate
Feb	4	Moderate
Mar	7	High
Apr	6	High
May	8	Very high
Jun	11	Extreme
Jul	11	Extreme
Aug	10	Very high
Sep	7	Very high
Oct	5	High
Nov	4	Moderate
Dec	2	Low

Air quality in Castlewood in Spring

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.

Air quality in Castlewood is worst in August — around 21 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (May, 13 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	17	15	16	13	13	14	14	21	13	15	15	16
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	17	Moderate
Feb	15	Moderate
Mar	16	Moderate
Apr	13	Moderate
May	13	Moderate
Jun	14	Moderate
Jul	14	Moderate
Aug	21	Moderate
Sep	13	Moderate
Oct	15	Moderate
Nov	15	Moderate
Dec	16	Moderate

Location & terrain

Where is Castlewood?

Castlewood sits at 39.6°N, 104.9°W, 5,728 ft above sea level, in United States. The nearest listed city is Centennial, 1.2 mi away.

Topography around Castlewood

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Castlewood.

Within 2 miles, the terrain around Castlewood has only modest variations in elevation — a maximum elevation change of 397 ft around an average of 5,719 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,467 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,459 ft.

The land around Castlewood is covered by artificial surfaces (57%) and trees (30%) within 2 miles, artificial surfaces (40%) and grassland (38%) within 10 miles, and grassland (49%) and trees (30%) within 50 miles.

2 miles

397 ft

artificial surfaces 57%

10 miles

1,467 ft

artificial surfaces 40%

50 miles

9,459 ft

grassland 49%

treesgrasslandcroplandartificial surfacesbare terrainwater

← Winter Castlewood year-round climate Summer →

Spring weather nearby: Centennial 1.2 mi · Southglenn 2.5 mi · Greenwood Village 3.7 mi · Highlands Ranch 4.3 mi · Englewood 6.2 mi · Littleton 6.2 mi · Parker 8.7 mi · Columbine 8.7 mi

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 Castlewood (39.5847°, -104.9011°, elevation 5,728 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.