Castle Rock weather in June

In June, Castle Rock sees average daytime highs of 76°F and overnight lows near 48°F, with 2.1 in of precipitation across 10.2 wet days and about 14.7 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 72°F in the first days to 80°F by the end. The sky is clear or mostly clear about 33% of the time in June, and the air most often feels dry.

Daylight stretches from about 14 h 36 min at the start of June to 14 h 48 min by month's end. Set against the rest of the year, June is Castle Rock's 10th-clearest and 4th-windiest month. For the whole year in context, see Castle Rock's year-round climate.

Daytime high
76°
3rd warmest
Overnight low
48°
10th coldest
Precipitation
2.1 in
10.2 wet days
Daylight
14 h 48 min
4:37 AM – 7:22 PM
Cloud cover
51%
10th clearest
Wind
6 mph
4th windiest
Solar energy
7.41 kWh/m²
Travel score
6.8
out of 10

Castle Rock is town in and seat of Douglas County, Colorado, United States.

Density
635/km²
people per km²
Founded
1874

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 72°F in the first days to 80°F by the end.

A typical June day in Castle Rock reaches about 76°F in the afternoon and slips back to 48°F overnight — a 28°F spread between the day's warmth and the night's chill. On most days the high lands between 65°F and 86°F. Set against its neighbours, June runs about 11°F warmer than May and about 5°F cooler than July.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17144
27144
37245
47245
57345
67346
77346
87446
97446
107447
117547
127547
137547
147648
157648
167648
177748
187749
197749
207849
217850
227850
237950
247950
257951
268051
278051
288051
298052
308052

How June really feels in Castle Rock

Once humidity and wind are folded in, June averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

June sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Castle Rock weather by month

How June compares with the rest of the year at a glance. June is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan39° / 12°0.64.24.79.50.0
Feb42° / 15°0.755.410.50.3
Mar49° / 22°1.76.95.911.72.2
Apr55° / 28°2.69.76.1133.5
May65° / 39°3.012.31.714.15.5
Jun76° / 48°2.110.20.114.76.8
Jul81° / 54°2.510.9014.56.5
Aug79° / 52°2.010.1013.56.9
Sep72° / 45°1.36.40.512.37.6
Oct60° / 32°1.45.52.4115.7
Nov48° / 21°1.04.94.99.82.0
Dec39° / 12°0.73.94.49.30.0

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in June.

Beyond those clear spells, partly cloudy skies cover about 30% of June, with mostly cloudy or overcast conditions the remaining 36%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25842
35941
46040
56040
66040
76040
86139
96040
106139
116139
126238
136238
146337
156337
166337
176436
186436
196535
206535
216634
226733
236733
246733
256832
266832
276832
286931
296931
306931

Chance of precipitation in June

Any precipitation

Castle Rock gets around 2.1 in of rain and snow over 10.2 wet days in June. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 34% and peaks near 40% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
140
240
339
438
538
637
737
837
936
1036
1135
1235
1335
1434
1534
1634
1734
1833
1933
2033
2132
2232
2332
2431
2531
2631
2731
2831
2931
3031

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

Most of June feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, June lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
10991
11991
12991
13991
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28982
29982
30973

Wind in June

Winds average 6 mph in June.

Across June, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in June

DaylightNight

Daylight runs from about 14 h 36 min at the start of June to 14 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over June. Sunrise moves from 4:40 AM to 4:40 AM, and sunset from 7:14 PM to 7:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.64:407:14
214.64:407:15
314.64:397:15
414.64:397:16
514.64:397:17
614.64:387:17
714.74:387:18
814.74:387:18
914.74:387:19
1014.74:377:20
1114.74:377:20
1214.74:377:21
1314.74:377:21
1414.74:377:22
1514.84:377:22
1614.84:377:22
1714.84:377:23
1814.84:377:23
1914.84:377:23
2014.84:377:24
2114.84:377:24
2214.84:387:24
2314.84:387:24
2414.84:387:25
2514.84:387:25
2614.84:397:25
2714.84:397:25
2814.84:397:25
2914.84:407:25
3014.84:407:25

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 7.41 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.61 kWh/m² to a high of 7.41 kWh/m² in June across the year — June's 7.41 kWh/m² sits near the top of that range.

02468151015202530
Solar energy (kWh/m²)Level
17.2Intense
27.2Intense
37.2Intense
47.3Intense
57.3Intense
67.3Intense
77.3Intense
87.3Intense
97.3Intense
107.4Intense
117.4Intense
127.4Intense
137.4Intense
147.4Intense
157.4Intense
167.4Intense
177.5Intense
187.5Intense
197.5Intense
207.5Intense
217.5Intense
227.5Intense
237.5Intense
247.5Intense
257.5Intense
267.5Intense
277.5Intense
287.4Intense
297.4Intense
307.4Intense
Planning a trip in June

Is June a good time to visit Castle Rock?

Our two travel scores rate June for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.8
Sightseeing
3rd-best month of the year
5.9
Beach & pool
3rd-best month of the year

June is a reasonable time to visit Castle Rock for sightseeing.

What to pack for Castle Rock in June

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

In June, Castle Rock sees daytime highs around 76°F and nights near 48°F. Pack sun protection. Worth having: light clothes and rain gear. About 10 days see rain.

sun protectionlight clothesrain gear

UV index in Castle Rock in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June peaks around 11 (very high — sun protection essential). 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 15UV 11Dec 22UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar7Very high
Apr7High
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec2Moderate
Location & terrain

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.

2 miles
646 ft
10 miles
2,028 ft
50 miles
9,268 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
June weather nearby: Parker 11 mi · Highlands Ranch 14 mi · Centennial 14 mi · Castlewood 15 mi · Southglenn 16 mi · Greenwood Village 17 mi · Littleton 19 mi · Columbine 19 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
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).