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Lunar phase today Boulder

Lunar Day 50

Moon phase today December 15, 2025

What is moon today in Boulder?

Today's lunar phase in Boulder, United States, the moon is in 🌘 the Waning Crescent phase, with 14.53% illumination, with an age of 25.86 days. The current distance between Boulder, United States and the moon is 404,205.93km.

Content:

Moon phase today

Note: all moon data below it's analytic based on this location coordinates latitude 40.0175 and longitude -105.2797 also base on Time zone America/Denver because of that and for higher accuracy you will find it different from place to place.
Monday, December 15, 2025
04:10:31 PM
Lunar Day 50
Waning Crescent
14.53%
Boulder
United States
  • Location:
    United States, Boulder
  • Moon phase:
    🌘 Waning Crescent
  • Lunar day (Moon Age):
    25.86
  • Illumination:
    14.53%
  • MoonRise/MoonSet:
    03:20/13:35
  • Altitude:
    8.34°
  • Period:
    🕑 10 Hours and 15 Minutes
  • Angular diameter:
    28.23°
  • Distance to Boulder:
    404,205.93km
  • Next full Moon:
    January 2, 2026 at 3:54 PM
  • Next full Moon countdown:
    17 Days, 23 Hours and 43 Minutes

Upcoming moon phases

December 16, 2025
Lunar Day 26
Waning Crescent
Illumination: 12.42%
Rise
04:21
Set
14:03
December 17, 2025
Lunar Day 27
Waning Crescent
Illumination: 6.9%
Rise
05:24
Set
14:36
December 18, 2025
Lunar Day 27
New Moon
Illumination: 2.9%
Rise
06:25
Set
15:17
December 19, 2025
Lunar Day 28
New Moon
Illumination: 0.58%
Rise
07:22
Set
16:05
December 20, 2025
Lunar Day 0
New Moon
Illumination: 0.04%
Rise
08:13
Set
17:01
December 21, 2025
Lunar Day 1
New Moon
Illumination: 1.36%
Rise
08:57
Set
18:03
December 22, 2025
Lunar Day 2
Waxing Crescent
Illumination: 4.55%
Rise
09:34
Set
19:08

Current moon cycle

It's common to give the moon four phases names (Moon Cycle), it's like they divide the moon phases to forth different times, First one is the new moon, second one is the first quarter, third one full moon, fourth one and the last it's the last quarter, In the below we will list for you the current moon cycles with the four times that we talked about
PhaseStart DateMoonriseMoonrsetIlluminationAge
🌑 New MoonThursday, November 20, 202507:3216:360%0.01
🌓 First QuarterThursday, November 27, 202512:2723:2939.75%6.41
🌕 Full MoonThursday, December 4, 202516:0607:0299.29%13.97
🌗 Last QuarterWednesday, December 10, 202523:1311:4866.2%20.6

Moon Phase Calendar for December, 2025

SundayMondayTuesdayWednesdayThursdayFridaySaturday
 
1Waxing Gibbous🌔 81.14%Age 10.54
2Waxing Gibbous🌔 89.49%Age 11.66
3Waxing Gibbous🌔 95.73%Age 12.81
4Full Moon🌕 99.29%Age 13.97
5Full Moon🌕 99.84%Age 15.14
6Full Moon🌕 97.37%Age 16.3
7Waning Gibbous🌖 92.19%Age 17.43
8Waning Gibbous🌖 84.85%Age 18.52
9Waning Gibbous🌖 75.97%Age 19.58
10Last Quarter🌗 66.2%Age 20.6
11Last Quarter🌗 56.05%Age 21.58
12Last Quarter🌗 45.97%Age 22.53
13Last Quarter🌗 36.3%Age 23.45
14Waning Crescent🌘 27.33%Age 24.36
15Waning Crescent🌘 19.3%Age 25.26
16Waning Crescent🌘 12.42%Age 26.14
17Waning Crescent🌘 6.9%Age 27.03
18New Moon🌑 2.9%Age 27.92
19New Moon🌑 0.58%Age 28.82
20New Moon🌑 0.04%Age 0.19
21New Moon🌑 1.36%Age 1.1
22Waxing Crescent🌒 4.55%Age 2.02
23Waxing Crescent🌒 9.57%Age 2.96
24Waxing Crescent🌒 16.31%Age 3.91
25Waxing Crescent🌒 24.59%Age 4.88
26First Quarter🌓 34.14%Age 5.87
27First Quarter🌓 44.64%Age 6.88
28First Quarter🌓 55.65%Age 7.92
29First Quarter🌓 66.67%Age 8.98
30Waxing Gibbous🌔 77.08%Age 10.07
31Waxing Gibbous🌔 86.21%Age 11.19