Moonrise, Moonset, and Phase Calendar for Boulder (USA) December 2025

Day

Day of
the week

Moon
day

Moonrise

Moonset

Moonrise

Moon
Noon

Distance
(km)

Illumination

Moon
Phase

01

Mon

12

03:00

14:04

21:04

367065

83.07%

02

Tue

13

04:18

14:36

22:01

361428

90.96%

03

Wed

14

05:39

15:16

23:03

357208

96.59%

04

Thu

15

07:01

16:06

354854

99.48%

Full
Moon
16:14

05

Fri

16

08:17

17:09

00:09

354623

99.39%

06

Sat

17

09:22

18:22

01:17

356526

96.36%

07

Sun

18

10:12

19:39

02:22

360323

90.73%

08

Mon

19

10:51

20:54

03:21

365579

83.03%

09

Tue

20

11:22

22:05

04:14

371758

73.91%

10

Wed

21

11:47

23:12

05:02

378309

63.98%

11

Thu

22

12:09

05:46

384738

53.80%

Third
Quarter
13:51

12

Fri

23

00:15

12:30

06:27

390658

43.79%

13

Sat

24

01:17

12:50

07:08

395795

34.30%

14

Sun

25

02:17

13:11

07:49

399995

25.57%

15

Mon

26

03:19

13:35

08:31

403198

17.83%

16

Tue

27

04:21

14:03

09:15

405423

11.26%

17

Wed

28

05:23

14:36

10:02

406736

6.06%

18

Thu

29

06:24

15:16

10:51

407227

2.42%

19

Fri

30

07:21

16:04

11:43

406983

0.48%

New
Moon
18:43

20

Sat

1

08:13

17:00

12:35

406077

0.35%

21

Sun

2

08:57

18:02

13:27

404549

2.09%

22

Mon

3

09:33

19:08

14:17

402409

5.68%

23

Tue

4

10:04

20:14

15:05

399642

11.05%

24

Wed

5

10:31

21:20

15:51

396230

18.09%

25

Thu

6

10:54

22:27

16:35

392169

26.61%

26

Fri

7

11:17

23:34

17:20

387502

36.36%

27

Sat

8

11:39

18:05

382346

47.00%

First
Quarter
12:09

28

Sun

9

00:43

12:04

18:53

376909

58.07%

29

Mon

10

01:56

12:32

19:45

371503

69.03%

30

Tue

11

03:13

13:06

20:43

366529

79.21%

31

Wed

12

04:32

13:50

21:46

362442

87.93%

All times are local time for Boulder

Moon phase details:

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Moon phases for:
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