Castle Rock weather in August
In August, Castle Rock sees average daytime highs of 79°F and overnight lows near 52°F, with 2.0 in of rain across 10.1 wet days and about 13.5 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.
Day-to-day highs hold fairly steady near 79°F through the month. The sky is clear or mostly clear about 39% of the time in August, and the air most often feels dry.
Daylight stretches from about 14 h 06 min at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Castle Rock's 8th-clearest and 12th-windiest month. For the whole year in context, see Castle Rock's year-round climate.
- Daytime high
- 79°
- 2nd warmest
- Overnight low
- 52°
- 11th coldest
- Rainfall
- 2.0 in
- 10.1 wet days
- Daylight
- 13 h 36 min
- 5:17 AM – 6:50 PM
- Cloud cover
- 49%
- 8th clearest
- Wind
- 5 mph
- 12th windiest
- Solar energy
- 6.46 kWh/m²
- Travel score
- 6.9
- 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 August
Day-to-day highs hold fairly steady near 79°F through the month.
A typical August day in Castle Rock reaches about 79°F in the afternoon and slips back to 52°F overnight — a 27°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 86°F. Set against its neighbours, August runs about 2°F cooler than July and about 7°F warmer than September.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 78 | 78 | 78 | 78 | 78 | 78 | 77 | 77 |
| Avg low (°F) | 54 | 54 | 54 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 51 | 51 | 51 | 51 | 51 | 51 | 50 | 50 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 80 | 54 |
| 2 | 80 | 54 |
| 3 | 80 | 54 |
| 4 | 80 | 53 |
| 5 | 80 | 53 |
| 6 | 80 | 53 |
| 7 | 80 | 53 |
| 8 | 79 | 53 |
| 9 | 79 | 53 |
| 10 | 79 | 53 |
| 11 | 79 | 53 |
| 12 | 79 | 53 |
| 13 | 79 | 53 |
| 14 | 79 | 53 |
| 15 | 79 | 52 |
| 16 | 79 | 52 |
| 17 | 79 | 52 |
| 18 | 79 | 52 |
| 19 | 79 | 52 |
| 20 | 79 | 52 |
| 21 | 79 | 52 |
| 22 | 79 | 52 |
| 23 | 79 | 52 |
| 24 | 78 | 51 |
| 25 | 78 | 51 |
| 26 | 78 | 51 |
| 27 | 78 | 51 |
| 28 | 78 | 51 |
| 29 | 78 | 51 |
| 30 | 77 | 50 |
| 31 | 77 | 50 |
How August really feels in Castle Rock
Once humidity and wind are folded in, August 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.
August 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 August compares with the rest of the year at a glance. August is the 2nd-warmest and 5th-wettest month here — the current month is highlighted below.
| 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 August
The sky is clear or mostly clear about 39% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 29% of August, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 62 | 63 | 63 | 64 | 64 | 65 | 65 | 66 | 66 | 67 | 67 | 68 | 69 | 69 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 71 | 71 | 72 | 73 | 73 | 74 | 73 |
| Cloudier (%) | 38 | 37 | 37 | 36 | 36 | 35 | 35 | 34 | 34 | 33 | 33 | 32 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 28 | 27 | 27 | 26 | 27 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 62 | 38 |
| 2 | 63 | 37 |
| 3 | 63 | 37 |
| 4 | 64 | 36 |
| 5 | 64 | 36 |
| 6 | 65 | 35 |
| 7 | 65 | 35 |
| 8 | 66 | 34 |
| 9 | 66 | 34 |
| 10 | 67 | 33 |
| 11 | 67 | 33 |
| 12 | 68 | 32 |
| 13 | 69 | 31 |
| 14 | 69 | 31 |
| 15 | 70 | 30 |
| 16 | 70 | 30 |
| 17 | 70 | 30 |
| 18 | 70 | 30 |
| 19 | 70 | 30 |
| 20 | 70 | 30 |
| 21 | 70 | 30 |
| 22 | 70 | 30 |
| 23 | 70 | 30 |
| 24 | 70 | 30 |
| 25 | 71 | 29 |
| 26 | 71 | 29 |
| 27 | 72 | 28 |
| 28 | 73 | 27 |
| 29 | 73 | 27 |
| 30 | 74 | 26 |
| 31 | 73 | 27 |
Chance of precipitation in August
Castle Rock gets around 2.0 in of rain over 10.1 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 32% and peaks near 39% on the wettest days. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 39 | 39 | 39 | 38 | 38 | 37 | 37 | 37 | 36 | 36 | 35 | 34 | 33 | 33 | 32 | 31 | 31 | 30 | 30 | 30 | 29 | 29 | 28 | 28 | 28 | 27 | 27 | 26 | 26 | 26 | 25 |
| Rain chance (%) | |
|---|---|
| 1 | 39 |
| 2 | 39 |
| 3 | 39 |
| 4 | 38 |
| 5 | 38 |
| 6 | 37 |
| 7 | 37 |
| 8 | 37 |
| 9 | 36 |
| 10 | 36 |
| 11 | 35 |
| 12 | 34 |
| 13 | 33 |
| 14 | 33 |
| 15 | 32 |
| 16 | 31 |
| 17 | 31 |
| 18 | 30 |
| 19 | 30 |
| 20 | 30 |
| 21 | 29 |
| 22 | 29 |
| 23 | 28 |
| 24 | 28 |
| 25 | 28 |
| 26 | 27 |
| 27 | 27 |
| 28 | 26 |
| 29 | 26 |
| 30 | 26 |
| 31 | 25 |
Humidity in August
Most of August feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the dry band about 96% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 88 | 88 | 89 | 90 | 91 | 91 | 92 | 93 | 94 | 94 | 95 | 96 | 96 | 97 | 97 | 97 | 97 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 99 | 99 | 99 | 99 | 99 | 99 | 99 |
| Comfortable (%) | 12 | 12 | 11 | 10 | 9 | 9 | 8 | 7 | 6 | 6 | 5 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| 1 | 88 | 12 |
| 2 | 88 | 12 |
| 3 | 89 | 11 |
| 4 | 90 | 10 |
| 5 | 91 | 9 |
| 6 | 91 | 9 |
| 7 | 92 | 8 |
| 8 | 93 | 7 |
| 9 | 94 | 6 |
| 10 | 94 | 6 |
| 11 | 95 | 5 |
| 12 | 96 | 4 |
| 13 | 96 | 4 |
| 14 | 97 | 3 |
| 15 | 97 | 3 |
| 16 | 97 | 3 |
| 17 | 97 | 3 |
| 18 | 98 | 2 |
| 19 | 98 | 2 |
| 20 | 98 | 2 |
| 21 | 98 | 2 |
| 22 | 98 | 2 |
| 23 | 98 | 2 |
| 24 | 98 | 2 |
| 25 | 99 | 1 |
| 26 | 99 | 1 |
| 27 | 99 | 1 |
| 28 | 99 | 1 |
| 29 | 99 | 1 |
| 30 | 99 | 1 |
| 31 | 99 | 1 |
Wind in August
Winds average 5 mph in August, the calmest month.
Across August, daily wind ranges from about 5 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
| 31 | 5 | calm |
Sunrise & sunset in August
Daylight runs from about 14 h 06 min at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 72 minutes over August. Sunrise moves from 5:03 AM to 5:31 AM, and sunset from 7:08 PM to 6:28 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.1 | 14.1 | 14.0 | 14.0 | 14.0 | 13.9 | 13.9 | 13.9 | 13.8 | 13.8 | 13.7 | 13.7 | 13.7 | 13.6 | 13.6 | 13.6 | 13.5 | 13.5 | 13.4 | 13.4 | 13.4 | 13.3 | 13.3 | 13.2 | 13.2 | 13.2 | 13.1 | 13.1 | 13.0 | 13.0 | 12.9 |
| Sunrise (AM) | 5:03 | 5:04 | 5:05 | 5:06 | 5:06 | 5:07 | 5:08 | 5:09 | 5:10 | 5:11 | 5:12 | 5:13 | 5:14 | 5:15 | 5:16 | 5:17 | 5:18 | 5:19 | 5:20 | 5:21 | 5:22 | 5:23 | 5:23 | 5:24 | 5:25 | 5:26 | 5:27 | 5:28 | 5:29 | 5:30 | 5:31 |
| Sunset (PM) | 7:08 | 7:07 | 7:06 | 7:05 | 7:04 | 7:03 | 7:02 | 7:00 | 6:59 | 6:58 | 6:57 | 6:56 | 6:54 | 6:53 | 6:52 | 6:50 | 6:49 | 6:47 | 6:46 | 6:45 | 6:43 | 6:42 | 6:40 | 6:39 | 6:37 | 6:36 | 6:34 | 6:33 | 6:31 | 6:29 | 6:28 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.1 | 5:03 | 7:08 |
| 2 | 14.1 | 5:04 | 7:07 |
| 3 | 14.0 | 5:05 | 7:06 |
| 4 | 14.0 | 5:06 | 7:05 |
| 5 | 14.0 | 5:06 | 7:04 |
| 6 | 13.9 | 5:07 | 7:03 |
| 7 | 13.9 | 5:08 | 7:02 |
| 8 | 13.9 | 5:09 | 7:00 |
| 9 | 13.8 | 5:10 | 6:59 |
| 10 | 13.8 | 5:11 | 6:58 |
| 11 | 13.7 | 5:12 | 6:57 |
| 12 | 13.7 | 5:13 | 6:56 |
| 13 | 13.7 | 5:14 | 6:54 |
| 14 | 13.6 | 5:15 | 6:53 |
| 15 | 13.6 | 5:16 | 6:52 |
| 16 | 13.6 | 5:17 | 6:50 |
| 17 | 13.5 | 5:18 | 6:49 |
| 18 | 13.5 | 5:19 | 6:47 |
| 19 | 13.4 | 5:20 | 6:46 |
| 20 | 13.4 | 5:21 | 6:45 |
| 21 | 13.4 | 5:22 | 6:43 |
| 22 | 13.3 | 5:23 | 6:42 |
| 23 | 13.3 | 5:23 | 6:40 |
| 24 | 13.2 | 5:24 | 6:39 |
| 25 | 13.2 | 5:25 | 6:37 |
| 26 | 13.2 | 5:26 | 6:36 |
| 27 | 13.1 | 5:27 | 6:34 |
| 28 | 13.1 | 5:28 | 6:33 |
| 29 | 13.0 | 5:29 | 6:31 |
| 30 | 13.0 | 5:30 | 6:29 |
| 31 | 12.9 | 5:31 | 6:28 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 6.46 kWh/m².
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 — August's 6.46 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.4 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.7 | Intense |
| 2 | 6.7 | Intense |
| 3 | 6.7 | Intense |
| 4 | 6.7 | Intense |
| 5 | 6.7 | Intense |
| 6 | 6.7 | Intense |
| 7 | 6.7 | Intense |
| 8 | 6.6 | Intense |
| 9 | 6.6 | Intense |
| 10 | 6.6 | Intense |
| 11 | 6.6 | Intense |
| 12 | 6.6 | Intense |
| 13 | 6.6 | Intense |
| 14 | 6.5 | Intense |
| 15 | 6.5 | Intense |
| 16 | 6.5 | Intense |
| 17 | 6.5 | Intense |
| 18 | 6.5 | Intense |
| 19 | 6.4 | Intense |
| 20 | 6.4 | Intense |
| 21 | 6.4 | Intense |
| 22 | 6.3 | Intense |
| 23 | 6.3 | Intense |
| 24 | 6.3 | Intense |
| 25 | 6.3 | Intense |
| 26 | 6.2 | Intense |
| 27 | 6.2 | Intense |
| 28 | 6.2 | Intense |
| 29 | 6.1 | Intense |
| 30 | 6.1 | Intense |
| 31 | 6.1 | Intense |
Is August a good time to visit Castle Rock?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a reasonable time to visit Castle Rock for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Castle Rock in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Castle Rock sees daytime highs around 79°F and nights near 52°F. Pack sun protection. Worth having: light clothes and rain gear. About 10 days see rain.
UV index in Castle Rock in August
Clear-sky midday UV in August peaks around 10 (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.
| 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. 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).