Sunrise and sunset times in Boulder, United States
Current local time: 8:23:27 PM (UTC-7)
Sun Direction: 272°53'2"
Sun Altitude: -41°10'58"
Distance to earth: 147,112,127 km
Sunrise Today: 7:22:11 AM, 120°11'47"
Sunset Today: 4:43:33 PM, 239°49'1"
000204060810121416182022
Night:
00:00 - 5:44:49 AM
6:20:55 PM - 00:00
Total: 11:23:54
Astronomical Twilight:
5:44:49 AM - 6:17:47 AM
5:47:58 PM - 6:20:55 PM
Total: 1:05:55
Nautical Twilight:
6:17:47 AM - 6:51:48 AM
5:13:56 PM - 5:47:58 PM
Total: 1:08:03
Civil Twilight:
6:51:48 AM - 7:22:11 AM
4:43:33 PM - 5:13:56 PM
Total: 1:00:46
Daylight:
7:22:11 AM - 4:43:33 PM
Total: 9:21:22
Today, December 28
- Sunrise7:22:11 AM
- Sunset4:43:33 PM
Tomorrow, December 29
- Sunrise7:22:26 AM
- Sunset4:44:17 PM
December 2025 — Sun in Boulder
| Date | Sun | Day length | Astronomical Twilight | Nautical Twilight | Civil Twilight | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | Sunrise | Sunset | Solar Noon | Lenth | Difference | Start | End | Start | End | Start | End | |
| December 1 | Mon | 7:04 AM | 4:36 PM | 11:50 AM | 9:32:11 | -1:15 | 5:28 AM | 6:12 PM | 6:00 AM | 5:39 PM | 6:34 AM | 5:06 PM |
| December 2 | Tue | 7:05 AM | 4:36 PM | 11:50 AM | 9:31:00 | -1:11 | 5:28 AM | 6:12 PM | 6:01 AM | 5:39 PM | 6:35 AM | 5:06 PM |
| December 3 | Wed | 7:06 AM | 4:36 PM | 11:51 AM | 9:29:51 | -1:09 | 5:29 AM | 6:12 PM | 6:02 AM | 5:39 PM | 6:36 AM | 5:06 PM |
| December 4 | Thu | 7:07 AM | 4:35 PM | 11:51 AM | 9:28:46 | -1:05 | 5:30 AM | 6:12 PM | 6:03 AM | 5:39 PM | 6:37 AM | 5:05 PM |
| December 5 | Fri | 7:08 AM | 4:35 PM | 11:51 AM | 9:27:44 | -1:02 | 5:31 AM | 6:12 PM | 6:04 AM | 5:39 PM | 6:37 AM | 5:05 PM |
| December 6 | Sat | 7:08 AM | 4:35 PM | 11:52 AM | 9:26:46 | -0:58 | 5:32 AM | 6:12 PM | 6:04 AM | 5:39 PM | 6:38 AM | 5:05 PM |
| December 7 | Sun | 7:09 AM | 4:35 PM | 11:52 AM | 9:25:52 | -0:54 | 5:32 AM | 6:12 PM | 6:05 AM | 5:39 PM | 6:39 AM | 5:05 PM |
| December 8 | Mon | 7:10 AM | 4:35 PM | 11:53 AM | 9:25:01 | -0:51 | 5:33 AM | 6:12 PM | 6:06 AM | 5:39 PM | 6:40 AM | 5:05 PM |
| December 9 | Tue | 7:11 AM | 4:35 PM | 11:53 AM | 9:24:13 | -0:48 | 5:34 AM | 6:12 PM | 6:07 AM | 5:39 PM | 6:41 AM | 5:06 PM |
| December 10 | Wed | 7:12 AM | 4:35 PM | 11:54 AM | 9:23:29 | -0:44 | 5:35 AM | 6:12 PM | 6:08 AM | 5:40 PM | 6:42 AM | 5:06 PM |
| December 11 | Thu | 7:13 AM | 4:35 PM | 11:54 AM | 9:22:49 | -0:40 | 5:35 AM | 6:13 PM | 6:08 AM | 5:40 PM | 6:42 AM | 5:06 PM |
| December 12 | Fri | 7:13 AM | 4:36 PM | 11:55 AM | 9:22:13 | -0:36 | 5:36 AM | 6:13 PM | 6:09 AM | 5:40 PM | 6:43 AM | 5:06 PM |
| December 13 | Sat | 7:14 AM | 4:36 PM | 11:55 AM | 9:21:40 | -0:33 | 5:37 AM | 6:13 PM | 6:10 AM | 5:40 PM | 6:44 AM | 5:06 PM |
| December 14 | Sun | 7:15 AM | 4:36 PM | 11:55 AM | 9:21:11 | -0:29 | 5:37 AM | 6:13 PM | 6:10 AM | 5:41 PM | 6:44 AM | 5:06 PM |
| December 15 | Mon | 7:16 AM | 4:36 PM | 11:56 AM | 9:20:47 | -0:24 | 5:38 AM | 6:14 PM | 6:11 AM | 5:41 PM | 6:45 AM | 5:07 PM |
| December 16 | Tue | 7:16 AM | 4:37 PM | 11:56 AM | 9:20:25 | -0:22 | 5:39 AM | 6:14 PM | 6:12 AM | 5:41 PM | 6:46 AM | 5:07 PM |
| December 17 | Wed | 7:17 AM | 4:37 PM | 11:57 AM | 9:20:09 | -0:16 | 5:39 AM | 6:15 PM | 6:12 AM | 5:42 PM | 6:46 AM | 5:07 PM |
| December 18 | Thu | 7:17 AM | 4:37 PM | 11:57 AM | 9:19:55 | -0:14 | 5:40 AM | 6:15 PM | 6:13 AM | 5:42 PM | 6:47 AM | 5:08 PM |
| December 19 | Fri | 7:18 AM | 4:38 PM | 11:58 AM | 9:19:46 | -0:09 | 5:40 AM | 6:15 PM | 6:13 AM | 5:42 PM | 6:48 AM | 5:08 PM |
| December 20 | Sat | 7:19 AM | 4:38 PM | 11:58 AM | 9:19:41 | -0:05 | 5:41 AM | 6:16 PM | 6:14 AM | 5:43 PM | 6:48 AM | 5:09 PM |
| December 21 | Sun | 7:19 AM | 4:39 PM | 11:59 AM | 9:19:40 | -0:01 | 5:42 AM | 6:16 PM | 6:15 AM | 5:43 PM | 6:49 AM | 5:09 PM |
| December 22 | Mon | 7:20 AM | 4:39 PM | 11:59 AM | 9:19:43 | +0:03 | 5:42 AM | 6:17 PM | 6:15 AM | 5:44 PM | 6:49 AM | 5:10 PM |
| December 23 | Tue | 7:20 AM | 4:40 PM | 12:00 PM | 9:19:49 | +0:06 | 5:42 AM | 6:17 PM | 6:15 AM | 5:44 PM | 6:50 AM | 5:10 PM |
| December 24 | Wed | 7:20 AM | 4:40 PM | 12:00 PM | 9:20:00 | +0:11 | 5:43 AM | 6:18 PM | 6:16 AM | 5:45 PM | 6:50 AM | 5:11 PM |
| December 25 | Thu | 7:21 AM | 4:41 PM | 12:01 PM | 9:20:14 | +0:14 | 5:43 AM | 6:19 PM | 6:16 AM | 5:46 PM | 6:50 AM | 5:11 PM |
| December 26 | Fri | 7:21 AM | 4:42 PM | 12:01 PM | 9:20:33 | +0:19 | 5:44 AM | 6:19 PM | 6:17 AM | 5:46 PM | 6:51 AM | 5:12 PM |
| December 27 | Sat | 7:21 AM | 4:42 PM | 12:02 PM | 9:20:55 | +0:22 | 5:44 AM | 6:20 PM | 6:17 AM | 5:47 PM | 6:51 AM | 5:13 PM |
| December 28 | Sun | 7:22 AM | 4:43 PM | 12:02 PM | 9:21:22 | +0:27 | 5:44 AM | 6:20 PM | 6:17 AM | 5:47 PM | 6:51 AM | 5:13 PM |
| December 29 | Mon | 7:22 AM | 4:44 PM | 12:03 PM | 9:21:51 | +0:29 | 5:45 AM | 6:21 PM | 6:18 AM | 5:48 PM | 6:52 AM | 5:14 PM |
| December 30 | Tue | 7:22 AM | 4:45 PM | 12:03 PM | 9:22:26 | +0:35 | 5:45 AM | 6:22 PM | 6:18 AM | 5:49 PM | 6:52 AM | 5:15 PM |
| December 31 | Wed | 7:22 AM | 4:45 PM | 12:04 PM | 9:23:03 | +0:37 | 5:45 AM | 6:23 PM | 6:18 AM | 5:50 PM | 6:52 AM | 5:16 PM |
Rise
7:22:11 AM
120°11'47"
7:22:11 AM
120°11'47"
Meridian
12:02:52 PM
180°
12:02:52 PM
180°
Set
4:43:33 PM
239°49'1"
4:43:33 PM
239°49'1"