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Boulder, Colorado, USA — Moonrise, Moonset, and Moon Phases, May 2026

Moon: 56.6%
Waning Gibbous
Current Time: May 8, 2026 at 11:22:50 pm
Moon Direction: 92° East
Moon Altitude: -29.6°
Moon Distance: 246,384 mi
Next New Moon: May 16, 2026, 2:01 pm
Next Full Moon: May 31, 2026, 2:45 am
Next Moonrise: Tomorrow, 2:02 am

Moonrise, Moonset, and Phase Calendar for Boulder, May 2026

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2026 Moonrise/Moonset Meridian Passing
May Moonrise Moonset Moonrise Time Distance (mi) Illumination
1 - 5:35 am (245°) 8:25 pm (118°) 12:32 am (31.7°) 249,151 99.7%
2 - 6:04 am (240°) 9:28 pm (123°) 1:18 am (27.3°) 250,521 99.5%
3 - 6:39 am (235°) 10:28 pm (127°) 2:06 am (24.0°) 251,529 97.4%
4 - 7:20 am (233°) 11:25 pm (128°) 2:55 am (21.9°) 252,091 93.5%
5 - 8:09 am (232°) - 3:47 am (21.1°) 252,115 88.0%
6 12:14 am (127°) 9:04 am (233°) - 4:38 am (21.7°) 251,511 80.9%
7 12:56 am (125°) 10:04 am (236°) - 5:28 am (23.7°) 250,211 72.7%
8 1:32 am (121°) 11:08 am (241°) - 6:17 am (26.9°) 248,189 63.5%
9 2:02 am (115°) 12:13 pm (247°) - 7:03 am (31.2°) 245,464 53.5%
10 2:28 am (109°) 1:18 pm (255°) - 7:49 am (36.4°) 242,137 43.1%
11 2:52 am (101°) 2:25 pm (263°) - 8:33 am (42.4°) 238,360 32.7%
12 3:15 am (93°) 3:33 pm (271°) - 9:18 am (48.9°) 234,385 22.8%
13 3:38 am (84°) 4:44 pm (280°) - 10:05 am (55.7°) 230,506 13.9%
14 4:03 am (76°) 5:59 pm (289°) - 10:55 am (62.4°) 227,080 6.7%
15 4:33 am (67°) 7:19 pm (297°) - 11:49 am (68.5°) 224,429 2.0%
16 5:10 am (60°) 8:40 pm (303°) - 12:49 pm (73.6°) 222,862 0.2%
17 5:56 am (55°) 9:58 pm (307°) - 1:54 pm (76.8°) 222,537 1.7%
18 6:54 am (52°) 11:07 pm (307°) - 3:01 pm (77.8°) 223,466 6.5%
19 8:04 am (53°) - - 4:07 pm (76.5°) 225,498 14.0%
20 - 12:02 am (305°) 9:20 am (57°) 5:08 pm (73.3°) 228,362 23.5%
21 - 12:45 am (299°) 10:36 am (63°) 6:04 pm (68.5°) 231,726 34.3%
22 - 1:19 am (293°) 11:49 am (70°) 6:54 pm (62.9°) 235,280 45.5%
23 - 1:47 am (285°) 12:59 pm (78°) 7:40 pm (56.7°) 238,767 56.5%
24 - 2:10 am (277°) 2:05 pm (87°) 8:24 pm (50.5°) 241,995 66.9%
25 - 2:32 am (269°) 3:08 pm (95°) 9:06 pm (44.3°) 244,841 76.3%
26 - 2:53 am (262°) 4:11 pm (103°) 9:47 pm (38.5°) 247,247 84.3%
27 - 3:15 am (254°) 5:14 pm (110°) 10:30 pm (33.2°) 249,190 90.9%
28 - 3:39 am (247°) 6:17 pm (116°) 11:15 pm (28.6°) 250,679 95.7%
29 - 4:07 am (241°) 7:19 pm (122°) Moon does not pass the meridian on this day.
30 - 4:39 am (237°) 8:21 pm (126°) 12:02 am (25.0°) 251,723 98.7%
31 - 5:18 am (234°) 9:19 pm (128°) 12:51 am (22.5°) 252,332 99.8%
* All times are local time for Boulder. Time is adjusted for DST when applicable. They take into account refraction. Dates are based on the Gregorian calendar. Illumination is calculated at lunar noon.

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