Boulder, CO sky calendar · August 2027
Full moon: Tue, Aug 17. New moon: Mon, Aug 2, Tue, Aug 31. Sunrise moves from 5:59 AM to 6:27 AM, sunset from 8:14 PM to 7:34 PM. 4 sky events this month (below). Times are local (MDT).
| Date | Sunrise | Sunset | Moonrise | Moonset | Moon |
|---|---|---|---|---|---|
| Sun, Aug 1 | 5:59 AM | 8:14 PM | 4:50 AM | 7:57 PM | Waning crescent · 1% |
| Mon, Aug 2 | 6:00 AM | 8:13 PM | 6:12 AM | 8:32 PM | New moon · 0% |
| Tue, Aug 3 | 6:01 AM | 8:12 PM | 7:32 AM | 9:01 PM | Waxing crescent · 3% |
| Wed, Aug 4 | 6:02 AM | 8:11 PM | 8:49 AM | 9:28 PM | Waxing crescent · 8% |
| Thu, Aug 5 | 6:03 AM | 8:10 PM | 10:03 AM | 9:54 PM | Waxing crescent · 16% |
| Fri, Aug 6 | 6:03 AM | 8:09 PM | 11:15 AM | 10:21 PM | Waxing crescent · 25% |
| Sat, Aug 7 | 6:04 AM | 8:08 PM | 12:25 PM | 10:49 PM | Waxing crescent · 35% |
| Sun, Aug 8 | 6:05 AM | 8:06 PM | 1:34 PM | 11:21 PM | First quarter · 45% |
| Mon, Aug 9 | 6:06 AM | 8:05 PM | 2:41 PM | 11:59 PM | Waxing gibbous · 56% |
| Tue, Aug 10 | 6:07 AM | 8:04 PM | 3:43 PM | — | Waxing gibbous · 66% |
| Wed, Aug 11 | 6:08 AM | 8:03 PM | 4:40 PM | 12:43 AM | Waxing gibbous · 75% |
| Thu, Aug 12 | 6:09 AM | 8:01 PM | 5:30 PM | 1:33 AM | Waxing gibbous · 82% |
| Fri, Aug 13 | 6:10 AM | 8:00 PM | 6:11 PM | 2:29 AM | Waxing gibbous · 89% |
| Sat, Aug 14 | 6:11 AM | 7:59 PM | 6:46 PM | 3:29 AM | Waxing gibbous · 94% |
| Sun, Aug 15 | 6:12 AM | 7:57 PM | 7:15 PM | 4:30 AM | Waxing gibbous · 98% |
| Mon, Aug 16 | 6:13 AM | 7:56 PM | 7:40 PM | 5:32 AM | Waxing gibbous · 100% |
| Tue, Aug 17 | 6:14 AM | 7:55 PM | 8:03 PM | 6:32 AM | Full moon · 100% |
| Wed, Aug 18 | 6:15 AM | 7:53 PM | 8:24 PM | 7:33 AM | Waning gibbous · 98% |
| Thu, Aug 19 | 6:16 AM | 7:52 PM | 8:45 PM | 8:33 AM | Waning gibbous · 95% |
| Fri, Aug 20 | 6:17 AM | 7:50 PM | 9:07 PM | 9:34 AM | Waning gibbous · 89% |
| Sat, Aug 21 | 6:18 AM | 7:49 PM | 9:31 PM | 10:36 AM | Waning gibbous · 82% |
| Sun, Aug 22 | 6:19 AM | 7:47 PM | 9:59 PM | 11:41 AM | Waning gibbous · 74% |
| Mon, Aug 23 | 6:20 AM | 7:46 PM | 10:32 PM | 12:48 PM | Waning gibbous · 64% |
| Tue, Aug 24 | 6:21 AM | 7:44 PM | 11:14 PM | 1:57 PM | Last quarter · 54% |
| Wed, Aug 25 | 6:22 AM | 7:43 PM | — | 3:05 PM | Waning crescent · 43% |
| Thu, Aug 26 | 6:23 AM | 7:41 PM | 12:07 AM | 4:08 PM | Waning crescent · 32% |
| Fri, Aug 27 | 6:23 AM | 7:40 PM | 1:10 AM | 5:03 PM | Waning crescent · 22% |
| Sat, Aug 28 | 6:24 AM | 7:38 PM | 2:24 AM | 5:48 PM | Waning crescent · 13% |
| Sun, Aug 29 | 6:25 AM | 7:37 PM | 3:42 AM | 6:26 PM | Waning crescent · 6% |
| Mon, Aug 30 | 6:26 AM | 7:35 PM | 5:02 AM | 6:58 PM | Waning crescent · 1% |
| Tue, Aug 31 | 6:27 AM | 7:34 PM | 6:20 AM | 7:27 PM | New moon · 0% |
Sky events this month
- Mon, Aug 2 4:06 AMTotal solar eclipseNot visible from Boulder, CO
- Thu, Aug 12Perseids meteor shower peakUp to about 100 meteors an hour under a perfectly dark sky · bright moonlight hides fainter meteors
- Tue, Aug 17 1:13 AMPenumbral lunar eclipseVisible from Boulder, CO
- Tue, Aug 17 1:29 AMFull moon
Month by month
Calculated with Astronomy Engine (MIT license).