<p>The further north you go, the time between sunset and darkness becomes longer, no matter the season. The reason is due to the velocity at that latitude. If there is 10 min of twilight on the equator, then there is $10\sqrt{2}$ min at 45° latitude, 20 min at 60° latitude, ...</p>

<p>Added:<br>
I used the <a href="http://aa.usno.navy.mil/data/docs/RS_OneYear.php" rel="nofollow">website</a> that @barrycarter listed above and discovered that there are 2 maxima and minima during the year. The solstices have the longest twilight times and the equinoxes have the shortest twilight times.</p>

CC BY-SA 3.0
2014-10-06T06:19:34.623Z
2014-10-10T01:45:39.443Z
2014-10-10T01:45:39.443Z
LDC3
<p>When one lives away from the equator, say at around 37° latitude, does the sky get darker faster after the sun sets in the winter as compared to the summer?  Why is this the case?  I believe that if you were to draw the path the sun traverses at different times of the year, the paths are parallel to each other but shifted, such that in summertime, the path is longer with a shorter section below the horizon and in winter it is shorter with a longer section below the horizon. I imagine that the angle of the path relative to the horizon is approximately the complement of your latitude.</p>

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2020-11-26T02:01:05.740Z
Just curious, do you feel that the answer that you've currently accepted fully answers your question as asked? If not, you can click again and it will un-accept which will encourage others to post answers you and/or future readers might like better and find more helpful based on what the question asks and what future readers will come here expecting to find answered.
uhoh
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2020-11-27T03:27:22.530Z
@uhoh I selected it as the best answer thus far, wouldn't expect that to mean others shouldn't provide other answers.
WilliamKF
<the-sun><rotation><sunrise><space-geometry><sunset>
Does the sky get darker faster during the winter?
WilliamKF
# Does the sky get darker faster during the winter?

(Asked by: username_0 on 2014-10-06)

When one lives away from the equator, say at around 37° latitude, does the sky get darker faster after the sun sets in the winter as compared to the summer? Why is this the case? I believe that if you were to draw the path the sun traverses at different times of the year, the paths are parallel to each other but shifted, such that in summertime, the path is longer with a shorter section below the horizon and in winter it is shorter with a longer section below the horizon. I imagine that the angle of the path relative to the horizon is approximately the complement of your latitude.

**Tags:** the-sun, rotation, sunrise, space-geometry, sunset

> **Comments:**
> **username_1**: Just curious, do you feel that the answer that you've currently accepted fully answers your question as asked? If not, you can click again and it will un-accept which will encourage others to post answers you and/or future readers might like better and find more helpful based on what the question asks and what future readers will come here expecting to find answered.  
> **username_0**: @username_1 I selected it as the best answer thus far, wouldn't expect that to mean others shouldn't provide other answers.  

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## 1 answers

### Answer by username_2 on 2014-10-06. Score: 2

The further north you go, the time between sunset and darkness becomes longer, no matter the season. The reason is due to the velocity at that latitude. If there is 10 min of twilight on the equator, then there is $10\sqrt{2}$ min at 45° latitude, 20 min at 60° latitude, ...

Added:  
I used the [website](http://aa.usno.navy.mil/data/docs/RS_OneYear.php) that @barrycarter listed above and discovered that there are 2 maxima and minima during the year. The solstices have the longest twilight times and the equinoxes have the shortest twilight times.


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