December 2026 Sunrise & Sunset Today in Guyancourt, France 🇫🇷
Sun Phase: Nautical Twilight
Sunrise Today: 06:16 ↑ 58.3° ENE
Sunset Today: 21:39 ↑ 301.5° WNW
Day Length: 15h 22m
Sun Direction: NW
Sun Altitude: -7.55°
Sun Distance: 151.938 million km
Next Equinox: Wednesday, September 23, 2026 (September Equinox)
When Is Sunrise & Sunset in Guyancourt?
December 2026 Sunrise & Sunset Times in Guyancourt
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| Day | Sunrise/Sunset | Daylight | Astronomical Twilight | Nautical Twilight | Civil Twilight | Solar Noon | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunrise | Sunset | Length | Diff. | Start | End | Start | End | Start | End | Time | Sun Dist. (Mil km) | |
| 1 |
08:23
↑
123° ESE
|
16:57
↑
237° WSW
|
8h 33m | -1m 49s | 06:29 | 18:51 | 07:07 | 18:13 | 07:46 | 17:34 | 12:40 | 147.52 |
| 2 |
08:24
↑
124° ESE
|
16:57
↑
236° WSW
|
8h 32m | -1m 45s | 06:30 | 18:51 | 07:08 | 18:13 | 07:47 | 17:34 | 12:40 | 147.50 |
| 3 |
08:26
↑
124° ESE
|
16:56
↑
236° SW
|
8h 30m | -1m 40s | 06:31 | 18:51 | 07:09 | 18:13 | 07:49 | 17:33 | 12:41 | 147.48 |
| 4 |
08:27
↑
124° SE
|
16:56
↑
236° SW
|
8h 28m | -1m 36s | 06:32 | 18:50 | 07:10 | 18:12 | 07:50 | 17:33 | 12:41 | 147.46 |
| 5 |
08:28
↑
124° SE
|
16:55
↑
236° SW
|
8h 27m | -1m 31s | 06:33 | 18:50 | 07:11 | 18:12 | 07:51 | 17:33 | 12:42 | 147.43 |
| 6 |
08:29
↑
124° SE
|
16:55
↑
236° SW
|
8h 25m | -1m 26s | 06:34 | 18:50 | 07:12 | 18:12 | 07:52 | 17:32 | 12:42 | 147.41 |
| 7 |
08:30
↑
125° SE
|
16:55
↑
235° SW
|
8h 24m | -1m 21s | 06:35 | 18:50 | 07:13 | 18:12 | 07:53 | 17:32 | 12:42 | 147.39 |
| 8 |
08:31
↑
125° SE
|
16:55
↑
235° SW
|
8h 23m | -1m 16s | 06:36 | 18:50 | 07:14 | 18:12 | 07:54 | 17:32 | 12:43 | 147.37 |
| 9 |
08:32
↑
125° SE
|
16:55
↑
235° SW
|
8h 22m | -1m 11s | 06:37 | 18:50 | 07:15 | 18:12 | 07:55 | 17:32 | 12:43 | 147.35 |
| 10 |
08:33
↑
125° SE
|
16:54
↑
235° SW
|
8h 21m | -1m 06s | 06:38 | 18:50 | 07:16 | 18:12 | 07:56 | 17:32 | 12:44 | 147.34 |
| 11 |
08:34
↑
125° SE
|
16:54
↑
235° SW
|
8h 19m | -1m 00s | 06:38 | 18:50 | 07:17 | 18:12 | 07:57 | 17:32 | 12:44 | 147.32 |
| 12 |
08:35
↑
125° SE
|
16:54
↑
235° SW
|
8h 19m | -0m 55s | 06:39 | 18:50 | 07:18 | 18:12 | 07:58 | 17:32 | 12:45 | 147.30 |
| 13 |
08:36
↑
126° SE
|
16:54
↑
234° SW
|
8h 18m | -0m 50s | 06:40 | 18:51 | 07:18 | 18:12 | 07:58 | 17:32 | 12:45 | 147.28 |
| 14 |
08:37
↑
126° SE
|
16:55
↑
234° SW
|
8h 17m | -0m 44s | 06:41 | 18:51 | 07:19 | 18:12 | 07:59 | 17:32 | 12:46 | 147.27 |
| 15 |
08:38
↑
126° SE
|
16:55
↑
234° SW
|
8h 16m | -0m 39s | 06:42 | 18:51 | 07:20 | 18:13 | 08:00 | 17:33 | 12:46 | 147.25 |
| 16 |
08:39
↑
126° SE
|
16:55
↑
234° SW
|
8h 16m | -0m 33s | 06:42 | 18:51 | 07:21 | 18:13 | 08:01 | 17:33 | 12:47 | 147.23 |
| 17 |
08:39
↑
126° SE
|
16:55
↑
234° SW
|
8h 15m | -0m 27s | 06:43 | 18:52 | 07:21 | 18:13 | 08:01 | 17:33 | 12:47 | 147.22 |
| 18 |
08:40
↑
126° SE
|
16:56
↑
234° SW
|
8h 15m | -0m 22s | 06:44 | 18:52 | 07:22 | 18:14 | 08:02 | 17:33 | 12:48 | 147.21 |
| 19 |
08:41
↑
126° SE
|
16:56
↑
234° SW
|
8h 15m | -0m 16s | 06:44 | 18:52 | 07:23 | 18:14 | 08:03 | 17:34 | 12:48 | 147.19 |
| 20 |
08:41
↑
126° SE
|
16:56
↑
234° SW
|
8h 14m | -0m 10s | 06:45 | 18:53 | 07:23 | 18:14 | 08:03 | 17:34 | 12:49 | 147.18 |
| 21 |
08:42
↑
126° SE
|
16:57
↑
234° SW
|
8h 14m | -0m 05s | 06:45 | 18:53 | 07:24 | 18:15 | 08:04 | 17:35 | 12:49 | 147.17 |
| 22 |
08:42
↑
126° SE
|
16:57
↑
234° SW
|
8h 14m | +0m 00s | 06:46 | 18:54 | 07:24 | 18:15 | 08:04 | 17:35 | 12:50 | 147.16 |
| 23 |
08:43
↑
126° SE
|
16:58
↑
234° SW
|
8h 15m | +0m 06s | 06:46 | 18:54 | 07:25 | 18:16 | 08:05 | 17:36 | 12:50 | 147.15 |
| 24 |
08:43
↑
126° SE
|
16:58
↑
234° SW
|
8h 15m | +0m 12s | 06:47 | 18:55 | 07:25 | 18:17 | 08:05 | 17:36 | 12:51 | 147.14 |
| 25 |
08:44
↑
126° SE
|
16:59
↑
234° SW
|
8h 15m | +0m 17s | 06:47 | 18:56 | 07:25 | 18:17 | 08:06 | 17:37 | 12:51 | 147.13 |
| 26 |
08:44
↑
126° SE
|
17:00
↑
234° SW
|
8h 15m | +0m 23s | 06:47 | 18:56 | 07:26 | 18:18 | 08:06 | 17:38 | 12:52 | 147.13 |
| 27 |
08:44
↑
126° SE
|
17:01
↑
234° SW
|
8h 16m | +0m 29s | 06:48 | 18:57 | 07:26 | 18:18 | 08:06 | 17:38 | 12:52 | 147.12 |
| 28 |
08:44
↑
126° SE
|
17:01
↑
234° SW
|
8h 16m | +0m 34s | 06:48 | 18:58 | 07:26 | 18:19 | 08:06 | 17:39 | 12:53 | 147.12 |
| 29 |
08:44
↑
126° SE
|
17:02
↑
234° SW
|
8h 17m | +0m 40s | 06:48 | 18:58 | 07:27 | 18:20 | 08:07 | 17:40 | 12:53 | 147.11 |
| 30 |
08:45
↑
126° SE
|
17:03
↑
234° SW
|
8h 18m | +0m 46s | 06:48 | 18:59 | 07:27 | 18:21 | 08:07 | 17:41 | 12:53 | 147.11 |
| 31 |
08:45
↑
125° SE
|
17:04
↑
235° SW
|
8h 19m | +0m 51s | 06:49 | 19:00 | 07:27 | 18:22 | 08:07 | 17:42 | 12:54 | 147.11 |
|
All times are in local time for Guyancourt. Time is adjusted for Daylight Saving Time (DST) when applicable. Calculations account for atmospheric refraction and are based on the Gregorian calendar. Today's date is in the table. |
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In Guyancourt, the earliest sunrise of December is on December 01 and the latest sunset of December is on December 31.
2026 Sun Graph for Guyancourt
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Sun's Path on Selected Date in Guyancourt
Today's Sunrise & Sunset times in other cities in France:
Sunrise & Sunset times in France ›
Is the Day Getting Longer or Shorter in Guyancourt?
Days in Guyancourt are currently getting shorter by about 2m 30s each day, roughly 17 minutes less daylight per week.
Golden Hour & Blue Hour in Guyancourt Today
| Morning | Evening | |
|---|---|---|
| Blue hour | 05:37-05:52 | 22:03-22:18 |
| Golden hour | 05:52-07:02 | 20:53-22:03 |
Guyancourt's Longest and Shortest Days
| Event | Date | Daylight |
|---|---|---|
| Longest day | June 22, 2026 | 16h 09m |
| Shortest day | December 21, 2026 | 8h 14m |
| Earliest sunrise | June 11, 2026 | 05:48 |
| Latest sunset | June 20, 2026 | 21:58 |
Understanding Twilight & the Golden Hour
After the sun drops below the horizon, the sky does not turn dark all at once. Civil twilight is the brightest stage, when there is still enough natural light for most outdoor activities. Nautical twilight follows, when the sea horizon becomes hard to make out. Astronomical twilight is the darkest stage, after which the sky is fully dark and the faintest stars appear. The same three stages occur in reverse before sunrise, as dawn.
In Guyancourt today, the morning golden hour runs 05:52-07:02 and the evening golden hour 20:53-22:03, with the cooler blue hour around 05:37-05:52 and 22:03-22:18. These warm and cool light windows drift through the year as the sun's path changes.
Frequently Asked Questions about Sun in Guyancourt
What time is sunrise in Guyancourt today?
Today Guyancourt has sunrise at 06:16 local time.
What time is sunset in Guyancourt today?
Sunset in Guyancourt today is at 21:39 local time.
What time is solar noon in Guyancourt today?
Solar noon in Guyancourt — when the sun is at its highest point in the sky — is at 13:58 local time today.
When does civil twilight begin and end in Guyancourt?
In Guyancourt today: civil twilight begins at 05:37 (before sunrise) and ends at 22:18 (after sunset). Civil twilight is the brightest of the three twilight phases.
When does nautical twilight occur in Guyancourt?
Nautical twilight in Guyancourt today runs from 04:46 in the morning to 23:09 in the evening — the period when the horizon is still visible to sailors but stars are out.
When is the sky fully dark in Guyancourt for stargazing?
Astronomical twilight in Guyancourt ends at 00:18 in the evening and resumes at 03:38 in the morning — between those times the sky is fully dark, ideal for observing faint stars and deep-sky objects.
Where on the horizon does the sun rise and set in Guyancourt?
Today in Guyancourt, the sun rises at an azimuth of 58° and sets at 302° (measured clockwise from due north). The exact angle shifts slightly each day with the seasons.
