Sunrise / Sunset Times for the Cascade Volcanoes
(page created February 2004, last updated May 2012)
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During the spring and summer, the sun is the primary factor affecting the condition and quality of the snow surface.
Maximum enjoyment (and often personal safety, too) depends on proper timing relative to sunhit on the slopes of
interest for skiing and climbing. This page displays a table of the sunrise and sunset times throughout the year
at several volcanoes spaced along the entire 750-mile (1200 km) length of the Cascade Range, along with a sun chart
for each which shows the elevation and azimuth of the sun throughout the winter and spring. The equinoxes and
solstices are highlighted in color in the table. The times for Civil Twilight (when the sun is less than 6°
below the horizon) are also included, since during this period there is usually sufficient light for climbing or
even skiing without artificial illumination. At these latitudes, twilight is longest at the summer solstice,
shortest at the equinoxes (when the sun rises and sets at its steepest angle), and moderately long again near the
winter solstice.
Note that on the sun chart, all times shown are in local standard time (not solar time) and unlike the table, the
chart does not include Daylight Saving Time. The second half of the year is nearly symmetrical, so the sun chart's
curve for May 21 also applies for July 21 (and Apr 20 for Aug 21, Mar 20 for Sep 22, etc.) with only a tiny
shift of a few minutes in the local time.
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Currently, values and charts have been calculated only for the 10 volcanoes listed in the menu, for the year 2004
(although DST is now calculated using the new law which went into effect in 2007).
Solar times differ by only a few minutes for other years and at neighboring volcanoes, so this list
should be sufficient for all practical purposes. Note that all calculations are made assuming a site at sea
level at the given coordinates. At high elevations, the sun will rise several minutes earlier and set several
minutes later. Varying atmospheric conditions which affect the amount of refraction of the sun's rays can also
shift the rise and set times by several minutes. See the "Notes" at the bottom of the page for further info
about these calculations.
Select a volcano from the menu at right to recalculate the first table and chart. The "Extended Version" has entries at
roughly 10-day intervals, while the "Printable Format" produces a plain page without headers, footers, and text.
The standard version in "Printable Format" will fit on a single printed page, but the "Extended Version" will
not unless the font size is greatly reduced. Using "Landscape Format" will allow either version to fit on a
single page printed in landscape orientation.
Select a date from the menu at right to change the date shown in
the lower table, which compares the sunrise / sunset times on the
summer and winter solstices and the selected day throughout the length of the Cascade Range.
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Mount Rainier
Washington 46.9° N, 121.8° W Dates of Daylight Saving Time valid for 2024
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| Date . |
Time
Zone |
Twilight
Begins |
Sunrise |
Solar
Noon |
Sunset |
Twilight
Ends |
Daylight
Hours |
Twilight
Hours |
Day +
Twilight |
Maximum
Solar Elev |
Sine (Max
Solar Elev) |
| Jan 01 |
PST |
7:17 AM |
7:53 AM |
12:11 PM |
4:29 PM |
5:04 PM |
8:36 |
1:11 |
9:47 |
20.1° |
0.343 |
| Feb 01 |
PST |
7:00 AM |
7:32 AM |
12:21 PM |
5:10 PM |
5:42 PM |
9:38 |
1:04 |
10:42 |
25.6° |
0.433 |
| Mar 01 |
PST |
6:16 AM |
6:46 AM |
12:20 PM |
5:54 PM |
6:24 PM |
11:08 |
1:00 |
12:08 |
35.1° |
0.575 |
| Mar 20 |
PDT |
6:39 AM |
7:09 AM |
1:15 PM |
7:21 PM |
7:51 PM |
12:12 |
1:00 |
13:12 |
42.4° |
0.675 |
| Apr 01 |
PDT |
6:15 AM |
6:45 AM |
1:11 PM |
7:37 PM |
8:08 PM |
12:52 |
1:01 |
13:53 |
47.1° |
0.733 |
| May 01 |
PDT |
5:17 AM |
5:51 AM |
1:04 PM |
8:18 PM |
8:52 PM |
14:27 |
1:08 |
15:35 |
57.8° |
0.847 |
| Jun 01 |
PDT |
4:38 AM |
5:16 AM |
1:05 PM |
8:55 PM |
9:33 PM |
15:39 |
1:16 |
16:55 |
65.1° |
0.907 |
| Jun 21 |
PDT |
4:33 AM |
5:13 AM |
1:09 PM |
9:06 PM |
9:45 PM |
15:53 |
1:19 |
17:12 |
66.6° |
0.918 |
| Jul 01 |
PDT |
4:37 AM |
5:17 AM |
1:11 PM |
9:05 PM |
9:45 PM |
15:48 |
1:20 |
17:08 |
66.2° |
0.915 |
| Aug 01 |
PDT |
5:12 AM |
5:48 AM |
1:13 PM |
8:39 PM |
9:14 PM |
14:51 |
1:11 |
16:02 |
60.7° |
0.872 |
| Sep 01 |
PDT |
5:56 AM |
6:27 AM |
1:06 PM |
7:46 PM |
8:17 PM |
13:19 |
1:02 |
14:21 |
50.6° |
0.772 |
| Sep 22 |
PDT |
6:24 AM |
6:55 AM |
12:59 PM |
7:04 PM |
7:34 PM |
12:09 |
1:01 |
13:10 |
42.4° |
0.675 |
| Oct 01 |
PDT |
6:36 AM |
7:07 AM |
12:56 PM |
6:46 PM |
7:16 PM |
11:39 |
1:01 |
12:40 |
38.9° |
0.628 |
| Nov 01 |
PDT |
7:19 AM |
7:51 AM |
12:50 PM |
5:50 PM |
6:22 PM |
9:59 |
1:04 |
11:03 |
27.9° |
0.469 |
| Dec 01 |
PST |
6:58 AM |
7:33 AM |
11:56 AM |
4:20 PM |
4:55 PM |
8:47 |
1:10 |
9:57 |
21.0° |
0.359 |
| Dec 21 |
PST |
7:15 AM |
7:50 AM |
12:05 PM |
4:21 PM |
4:57 PM |
8:31 |
1:11 |
9:42 |
19.6° |
0.335 |
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Comparison of Longest and Shortest Days of Year
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