Seasonal figures below use a 2025 reference year. Choose a date in the planner above for that day’s times, golden hour, twilight, and daylight milestones.
Seasonal Sun Milestones in Lake Oswego
Lake Oswego's 9 PM sunsets run from about June 12 to July 9 — 28 evenings in a typical year. The wider season of sunsets at 7 PM or later lasts 202 days, from March 9 to September 26. At the other end of the year, sunsets before 4:30 PM begin around December 1 and last until December 18.
Days in Lake Oswego first reach 12 hours of daylight around March 17, a few days before the March equinox, and drop back under 12 hours after September 24. Days with at least 15 hours of daylight run from May 18 to July 24. Days with less than 9 hours of daylight run from November 30 to January 10 (42 days).
The Sun's rising point moves along the horizon too. Around the June solstice it rises in the NE (54°) and sets in the NW (306°); by the December solstice it rises in the ESE (123°) and sets in the WSW (237°). That is a 69° swing — worth knowing when choosing a west-facing viewpoint for a summer sunset or an east-facing window for winter morning light.
Dates use the 2025 reference year. Clock-time milestones near daylight-saving changes move with the second Sunday in March and the first Sunday in November.
Daylight Through the Year in Lake Oswego
Lake Oswego lies at 45.41°N, high enough in latitude that residents feel the seasons clearly in the length of the day. Between the summer and winter solstice, daylight in Lake Oswego changes by 6h 58m.
On the summer solstice around June 21, Lake Oswego receives 15h 40m of daylight — the longest day of the year. By the winter solstice around December 21, that shrinks to 8h 43m, the shortest day. At the spring and autumn equinoxes, day and night are nearly equal at about 12h 11m, as they are everywhere on Earth.
Sunset moves fastest around September, when it shifts by up to 1.9 minutes a day in Lake Oswego, and barely moves for weeks around the solstices. See how sunrise and sunset change through the year for why.
The Sun's Path Over Lake Oswego
Where the Sun sits in the sky over Lake Oswego depends on the season, and the contrast between summer and winter is set by the city's latitude of 45.41°N. On the summer solstice the midday Sun reaches 68.0° above the horizon in Lake Oswego, its highest point of the year. On the winter solstice the midday Sun only reaches 21.2°, sitting much lower in the southern sky and casting long shadows even at noon.
Those roughly 47 degrees separating the summer and winter midday Sun are exactly what give Lake Oswego its seasons.
The live sun path at the top of this page shows the Sun's altitude and compass bearing for the current moment or any chosen date.
Earliest and Latest Sunrises and Sunsets in Lake Oswego
It is natural to assume Lake Oswego sees its latest sunset on the longest day of the year, but it does not. The latest sunset actually falls around June 25 at about 9:03 PM, while the earliest sunset comes around December 9 at roughly 4:28 PM — noticeably before the December solstice.
On the morning side, the earliest sunrise in Lake Oswego is around June 15 at 5:22 AM, and the latest sunrise around November 1 at 7:51 AM. The equation of time and daylight saving pull these dates away from the solstices — explained in why the latest sunset isn't on the longest day.
How Daylight Saving Time Moves Sunrise and Sunset in Lake Oswego
Lake Oswego, Oregon changes its clocks twice a year, and both changes are visible in this page's numbers. On the second Sunday in March, Lake Oswego springs forward and the evening changes overnight: sunset jumps from about 6:08 PM on Saturday to about 7:09 PM on Sunday. The price is paid at dawn — sunrise slips from around 6:36 AM back to 7:34 AM, so mornings turn dark again just as they were brightening.
The reverse comes on the first Sunday in November, when clocks fall back: sunset drops from about 5:57 PM to 4:56 PM in a single day — the abrupt start of the early-dusk season — while sunrise brightens from around 7:51 AM to 6:52 AM.
Only the clock label shifts on those Sundays; the times above are for a typical year. More in how daylight saving time changes sunrise and sunset.
Golden Hour & Blue Hour Photography in Lake Oswego
For photographers in Lake Oswego, Oregon, the planner shows your selected date's morning and evening golden-hour and blue-hour windows. Choose Today, Tomorrow, or a date in the calendar; all clock times are calculated in Lake Oswego's local timezone.
Golden "hour" is a misnomer — its length in Lake Oswego depends on the season, because it lasts as long as the Sun takes to climb from the horizon to 6° (or descend back). Around the equinoxes it runs about 39 minutes; near the June solstice, when the Sun rises and sets at a shallower angle, it stretches to roughly 46 minutes, and near the December solstice it lasts about 49 minutes.
See the golden hour guide and blue hour guide for how to plan a shoot around these windows.
Solar Energy Potential in Lake Oswego
Under clear skies, Lake Oswego, Oregon receives about 4.6 peak sun hours per day averaged across the year — from roughly 1.3 in December up to 8.2 in June. One peak sun hour equals one hour of sunlight at full intensity (1 kW/m²), the standard unit for estimating solar panel output.
Because Lake Oswego sits at 45.4°N, a fixed, south-facing panel captures the most energy over the year when tilted at roughly 45° from horizontal — about equal to the latitude. If you adjust the tilt seasonally, flatten to about 30° in summer, when the Sun rides high, and steepen to about 60° in winter, when it stays low.
These are clear-sky upper bounds from Lake Oswego's solar geometry, not a forecast; clouds, shading, and equipment lower real output. See what peak sun hours mean.
How Lake Oswego Compares
Daylight in Lake Oswego swings 6h 58m between the June and December solstices. The median across the 1,847 cities on this site is 5h 16m, so the seasons move the clock 1h 41m further in Lake Oswego than in a typical American city. By that measure Lake Oswego ranks 88th of 1,847 nationally, and 10th of the 27 Oregon cities listed here — counting from the largest swing down.
Lake Oswego sits about 2.7° west of 120°W — the meridian Pacific Time is built around. Longitude alone therefore puts mean solar noon roughly 11 minutes after clock noon in standard time, so the Sun runs behind the clock here, which is why evenings hold light later than the time zone would suggest. The equation of time then moves true solar noon up to about 16 minutes either side of that through the year.
About Sun Times in Lake Oswego
Lake Oswego, Oregon, has an estimated urban-area population of 40,381. Its primary county or equivalent is Clackamas; its center is at 45.41°N, 122.70°W. Clocks here follow Pacific Time, which is the timezone all sunrise, sunset, golden-hour and twilight times on this page are shown in.
Times are computed for Lake Oswego's city-center coordinates, so towns to the east see each event slightly earlier and towns to the west slightly later; the nearby-cities list above shows the typical gap.