Sunrise / Sunset Times for the Cascade Volcanoes
(page created February 2004)
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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
(calculated for 2004) 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. Note that on the sun
chart, all times shown are in local standard time (not solar time) and unlike the table above it, the chart does
not include Daylight Savings 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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Select a volcano from the menu at right to recalculate the 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.) Currently, values and charts have been calculated only for the 10
volcanoes listed in the menu. Solar times differ by only a few minutes 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 links at the bottom of the page for further notes
about these calculations.
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Mount Rainier
46.9° N, 121.8° W
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| Date . |
Time Zone |
Twilight Begins |
Sunrise |
Sunset |
Twilight Ends |
Daylight Hours |
Twilight Hours |
| Jan 01 |
PST |
7:17 AM |
7:53 AM |
4:29 PM |
5:04 PM |
8:36 |
9:47 |
| Feb 01 |
PST |
7:00 AM |
7:32 AM |
5:10 PM |
5:42 PM |
9:38 |
10:42 |
| Mar 01 |
PST |
6:16 AM |
6:46 AM |
5:54 PM |
6:24 PM |
11:08 |
12:08 |
| Mar 20 |
PST |
5:39 AM |
6:09 AM |
6:21 PM |
6:51 PM |
12:12 |
13:12 |
| Apr 01 |
PST |
5:15 AM |
5:45 AM |
6:37 PM |
7:08 PM |
12:52 |
13:53 |
| May 01 |
PDT |
5:17 AM |
5:51 AM |
8:18 PM |
8:52 PM |
14:27 |
15:35 |
| Jun 01 |
PDT |
4:38 AM |
5:16 AM |
8:55 PM |
9:33 PM |
15:39 |
16:55 |
| Jun 21 |
PDT |
4:33 AM |
5:13 AM |
9:06 PM |
9:45 PM |
15:53 |
17:12 |
| Jul 01 |
PDT |
4:37 AM |
5:17 AM |
9:05 PM |
9:45 PM |
15:48 |
17:08 |
| Aug 01 |
PDT |
5:12 AM |
5:48 AM |
8:39 PM |
9:14 PM |
14:51 |
16:02 |
| Sep 01 |
PDT |
5:56 AM |
6:27 AM |
7:46 PM |
8:17 PM |
13:19 |
14:21 |
| Sep 22 |
PDT |
6:24 AM |
6:55 AM |
7:04 PM |
7:34 PM |
12:09 |
13:10 |
| Oct 01 |
PDT |
6:36 AM |
7:07 AM |
6:46 PM |
7:16 PM |
11:39 |
12:40 |
| Nov 01 |
PST |
6:19 AM |
6:51 AM |
4:50 PM |
5:22 PM |
9:59 |
11:03 |
| Dec 01 |
PST |
6:58 AM |
7:33 AM |
4:20 PM |
4:55 PM |
8:47 |
9:57 |
| Dec 21 |
PST |
7:15 AM |
7:50 AM |
4:21 PM |
4:57 PM |
8:31 |
9:42 |
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