Boulder, CO sky calendar · January 2027
Full moon: Fri, Jan 22. New moon: Thu, Jan 7. Sunrise moves from 7:22 AM to 7:10 AM, sunset from 4:46 PM to 5:18 PM. 3 sky events this month (below). Times are local (MST).
| Date | Sunrise | Sunset | Moonrise | Moonset | Moon |
|---|---|---|---|---|---|
| Fri, Jan 1 | 7:22 AM | 4:46 PM | 1:54 AM | 12:15 PM | Waning crescent · 30% |
| Sat, Jan 2 | 7:23 AM | 4:47 PM | 2:59 AM | 12:45 PM | Waning crescent · 22% |
| Sun, Jan 3 | 7:23 AM | 4:48 PM | 4:03 AM | 1:20 PM | Waning crescent · 14% |
| Mon, Jan 4 | 7:23 AM | 4:48 PM | 5:04 AM | 2:01 PM | Waning crescent · 8% |
| Tue, Jan 5 | 7:23 AM | 4:49 PM | 6:00 AM | 2:49 PM | Waning crescent · 4% |
| Wed, Jan 6 | 7:23 AM | 4:50 PM | 6:50 AM | 3:44 PM | Waning crescent · 1% |
| Thu, Jan 7 | 7:23 AM | 4:51 PM | 7:33 AM | 4:43 PM | New moon · 0% |
| Fri, Jan 8 | 7:22 AM | 4:52 PM | 8:09 AM | 5:45 PM | Waxing crescent · 1% |
| Sat, Jan 9 | 7:22 AM | 4:53 PM | 8:38 AM | 6:47 PM | Waxing crescent · 3% |
| Sun, Jan 10 | 7:22 AM | 4:54 PM | 9:04 AM | 7:49 PM | Waxing crescent · 8% |
| Mon, Jan 11 | 7:22 AM | 4:55 PM | 9:27 AM | 8:50 PM | Waxing crescent · 13% |
| Tue, Jan 12 | 7:22 AM | 4:56 PM | 9:48 AM | 9:52 PM | Waxing crescent · 21% |
| Wed, Jan 13 | 7:21 AM | 4:57 PM | 10:09 AM | 10:54 PM | Waxing crescent · 29% |
| Thu, Jan 14 | 7:21 AM | 4:59 PM | 10:31 AM | — | Waxing crescent · 39% |
| Fri, Jan 15 | 7:21 AM | 5:00 PM | 10:56 AM | 12:00 AM | First quarter · 49% |
| Sat, Jan 16 | 7:20 AM | 5:01 PM | 11:25 AM | 1:08 AM | Waxing gibbous · 60% |
| Sun, Jan 17 | 7:20 AM | 5:02 PM | 12:01 PM | 2:20 AM | Waxing gibbous · 71% |
| Mon, Jan 18 | 7:19 AM | 5:03 PM | 12:47 PM | 3:35 AM | Waxing gibbous · 81% |
| Tue, Jan 19 | 7:19 AM | 5:04 PM | 1:46 PM | 4:48 AM | Waxing gibbous · 89% |
| Wed, Jan 20 | 7:18 AM | 5:05 PM | 2:57 PM | 5:54 AM | Waxing gibbous · 95% |
| Thu, Jan 21 | 7:18 AM | 5:06 PM | 4:16 PM | 6:49 AM | Waxing gibbous · 99% |
| Fri, Jan 22 | 7:17 AM | 5:08 PM | 5:38 PM | 7:33 AM | Full moon · 100% |
| Sat, Jan 23 | 7:16 AM | 5:09 PM | 6:58 PM | 8:08 AM | Waning gibbous · 98% |
| Sun, Jan 24 | 7:16 AM | 5:10 PM | 8:13 PM | 8:37 AM | Waning gibbous · 93% |
| Mon, Jan 25 | 7:15 AM | 5:11 PM | 9:25 PM | 9:03 AM | Waning gibbous · 85% |
| Tue, Jan 26 | 7:14 AM | 5:12 PM | 10:35 PM | 9:27 AM | Waning gibbous · 77% |
| Wed, Jan 27 | 7:13 AM | 5:13 PM | 11:42 PM | 9:51 AM | Waning gibbous · 67% |
| Thu, Jan 28 | 7:13 AM | 5:15 PM | — | 10:17 AM | Waning gibbous · 57% |
| Fri, Jan 29 | 7:12 AM | 5:16 PM | 12:49 AM | 10:46 AM | Last quarter · 47% |
| Sat, Jan 30 | 7:11 AM | 5:17 PM | 1:54 AM | 11:19 AM | Waning crescent · 37% |
| Sun, Jan 31 | 7:10 AM | 5:18 PM | 2:57 AM | 11:58 AM | Waning crescent · 28% |
Sky events this month
- Sun, Jan 3 10:56 AMVenus farthest from the Sun in the morning sky47° from the Sun: the best time to see it, low in the east before sunrise
- Sun, Jan 3Quadrantids meteor shower peakUp to about 110 meteors an hour under a perfectly dark sky · the Moon stays out of the way
- Fri, Jan 22 5:17 AMFull moonSupermoon: a full moon close to Earth, slightly bigger and brighter
Month by month
Calculated with Astronomy Engine (MIT license).