Sunrise and Sunsetin Boulder, United States
August 2025
Sunrise
6:00 AM
Sunset
8:14 PM
On 1 August, the sun rises at 6:00 AM and sets at 8:14 PM.
The sun is 14 hours 14 minutes above the horizon (the length of the day).
Astronomical dawn (first rays of light) begins at 4:11 AM and at 10:02 PM it is completely dark (the end of astronomical twilight).
The sun is 14 hours 14 minutes above the horizon (the length of the day).
Astronomical dawn (first rays of light) begins at 4:11 AM and at 10:02 PM it is completely dark (the end of astronomical twilight).
| Date | Sunrise | Sunset | Day length |
|---|---|---|---|
| 1 August 2025, Friday | 6:00 AM | 8:14 PM | 14h 14m |
| 2 August 2025, Saturday | 6:00 AM | 8:13 PM | 14h 12m |
| 3 August 2025, Sunday | 6:01 AM | 8:12 PM | 14h 10m |
| 4 August 2025, Monday | 6:02 AM | 8:11 PM | 14h 08m |
| 5 August 2025, Tuesday | 6:03 AM | 8:10 PM | 14h 06m |
| 6 August 2025, Wednesday | 6:04 AM | 8:09 PM | 14h 04m |
| 7 August 2025, Thursday | 6:05 AM | 8:07 PM | 14h 02m |
| 8 August 2025, Friday | 6:06 AM | 8:06 PM | 14h 00m |
| 9 August 2025, Saturday | 6:07 AM | 8:05 PM | 13h 57m |
| 10 August 2025, Sunday | 6:08 AM | 8:04 PM | 13h 55m |
| 11 August 2025, Monday | 6:09 AM | 8:02 PM | 13h 53m |
| 12 August 2025, Tuesday | 6:10 AM | 8:01 PM | 13h 51m |
| 13 August 2025, Wednesday | 6:11 AM | 8:00 PM | 13h 48m |
| 14 August 2025, Thursday | 6:12 AM | 7:59 PM | 13h 46m |
| 15 August 2025, Friday | 6:13 AM | 7:57 PM | 13h 44m |
| 16 August 2025, Saturday | 6:14 AM | 7:56 PM | 13h 42m |
| 17 August 2025, Sunday | 6:15 AM | 7:54 PM | 13h 39m |
| 18 August 2025, Monday | 6:16 AM | 7:53 PM | 13h 37m |
| 19 August 2025, Tuesday | 6:17 AM | 7:52 PM | 13h 35m |
| 20 August 2025, Wednesday | 6:18 AM | 7:50 PM | 13h 32m |
| 21 August 2025, Thursday | 6:18 AM | 7:49 PM | 13h 30m |
| 22 August 2025, Friday | 6:19 AM | 7:47 PM | 13h 27m |
| 23 August 2025, Saturday | 6:20 AM | 7:46 PM | 13h 25m |
| 24 August 2025, Sunday | 6:21 AM | 7:44 PM | 13h 22m |
| 25 August 2025, Monday | 6:22 AM | 7:43 PM | 13h 20m |
| 26 August 2025, Tuesday | 6:23 AM | 7:41 PM | 13h 18m |
| 27 August 2025, Wednesday | 6:24 AM | 7:40 PM | 13h 15m |
| 28 August 2025, Thursday | 6:25 AM | 7:38 PM | 13h 13m |
| 29 August 2025, Friday | 6:26 AM | 7:37 PM | 13h 10m |
| 30 August 2025, Saturday | 6:27 AM | 7:35 PM | 13h 08m |
| 31 August 2025, Sunday | 6:28 AM | 7:34 PM | 13h 05m |