Solarposition.org

Maryland · United States · 38.99° N · 76.98° W

Solar position in Langley Park

Sun position, daylight and the best solar panel angle for Langley Park — computed for 38.99° N, 76.98° W, 46 m above sea level.

Sunrise today07:26105° ESE
Sunset today18:16255° WSW
Best panel angle34°year-round, facing south
Off-grid angle63°best for the darkest month

The sun right now

Azimuth180.0°
Elevation39.1°
At solar noon, 12:51Open on the sun map

Sun in Langley Park today

Saturday, 24 October 2026 · local time UTC−4

EventTimeDirection / height
Astronomical dawn05:57sun 18° below horizon
Nautical dawn06:2812° below
Civil dawn06:596° below
Sunrise07:26105° ESE
Golden hour ends08:03sun 6° up
Solar noon12:5139.1° high
Golden hour starts17:39sun 6° up
Sunset18:16255° WSW
Civil dusk18:446° below
Nautical dusk19:1512° below
Astronomical dusk19:4618° below
Day length10 h 50 min

Sun path diagram for Langley Park

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice67891011121314151617181920EquinoxDecember solstice8910111213141516Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 74.5° at solar noon in Langley Park; on the December solstice only 27.6°. Sunrise swings from 58° ENE in June to 120° ESE in December — a 62° arc along the horizon.

Sunrise, sunset and sun height by month

Values for the 21st of each month, local clock time including daylight saving time.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January07:2212:1917:169 h 54 min31.3°
February06:5112:2117:5211 h 01 min40.7°
March07:0913:1519:2012 h 11 min51.5°
April06:2213:0619:5113 h 28 min63.1°
May05:5013:0420:1914 h 29 min71.3°
June05:4213:0920:3714 h 54 min74.5°
July05:5913:1420:2814 h 30 min71.4°
August06:2613:1019:5413 h 28 min63.0°
September06:5413:0019:0612 h 12 min51.5°
October07:2312:5218:2010 h 57 min40.2°
November06:5711:5316:499 h 52 min31.0°
December07:2312:0616:489 h 26 min27.6°

A year of daylight in Langley Park

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in Langley Park

Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.

34°collects the most energy over a year: 1432 kWh per kWp.

63°gives the most in the darkest month — the one an off-grid system is sized for.

40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 34°Best worst-month 63°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°122285%1.493.4×
15°136595%2.102.4×
30°1429100%2.571.8×
34° year-round best1432100%2.681.7×
39° = latitude1427100%2.781.6×
45°141098%2.891.5×
60°131092%3.021.3×
63° off-grid best128190%3.031.3×
70°120384%3.011.3×
90°90964%2.721.9×

A fixed array in Langley Park produces the most over a year at 34°. The design month for an off-grid system is December: at 63° it makes 3.03 kWh per kWp a day, 13% more than at 34°, and costs 10% of the yearly total. Why steep panels win winter.

Off-grid solar in Langley Park at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 34° (year-round best).

012345January: 3.36 (70°)3.4JanFebruary: 3.61 (70°)3.6FebMarch: 3.66 (70°)3.7MarApril: 3.41 (70°)3.4AprMay: 2.96 (70°)3.0MayJune: 2.87 (70°)2.9JunJuly: 2.94 (70°)2.9JulAugust: 3.18 (70°)3.2AugSeptember: 3.48 (70°)3.5SepOctober: 3.58 (70°)3.6OctNovember: 3.53 (70°)3.5NovDecember: 3.01 (70°)3.0Dec34°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 34°Mean temp.
January snow2.093.723.362.99-0.1 °C
February2.924.013.613.611.1 °C
March3.904.143.664.125.7 °C
April5.003.973.414.4912.0 °C
May5.583.542.964.4317.5 °C
June6.243.502.874.6222.7 °C
July6.143.622.944.5925.6 °C
August5.413.893.184.4124.8 °C
September4.394.183.484.1521.0 °C
October3.264.183.583.7014.1 °C
November2.404.023.533.277.5 °C
December1.833.363.012.682.5 °C
Year4.10 avg3.84 avg1203 kWh1432 kWh

Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 410 Wp of panels at 70°, versus 440 Wp at 34°. The steep array is 7% smaller for the same winter. Size your own system.

Row spacing in Langley Park

Distance between rows of 2 m long panels (slope length) so that no row shades the next between 10:00 and 14:00 solar time on the winter solstice.

4.8 mrow pitch at 70°

4.1 mrow pitch at 34°

Row spacing calculator

How Langley Park compares in the United States

Against the other 3,120 places in the United States with climate data, for a fixed array at its best angle.

1685thof 3,121 places in the United States for sunshine, shared: 4.10 peak sun hours a day on flat ground.

−6%solar energy a year compared with the average place in the United States: 1,432 against 1,515 kWh per kWp.

−11 mindaylight on the longest day, compared with New York City: 14 h 54 min against 15 h 06 min.

34°best year-round tilt here; across the United States it runs from 18° in Honolulu to 53° in Fairbanks.

Of the 3,121 places in the United States, Fortuna Foothills and 2 other places get the most sun (5.96 peak sun hours a day) and Juneau the least (2.38); Langley Park ranks joint 1685th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.87 kWh a day here, against 2.55 kWh on average in the United States. The shortest day lasts 9 h 26 min, +11 min compared with New York City.

The sunniest places in the United States

Solar forecast for Langley Park, next 48 hours

Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.

Loading the latest forecast…

Questions about the sun in Langley Park

What is the best solar panel angle in Langley Park?
For a fixed array facing south, the best year-round tilt in Langley Park is 34°, worth about 1432 kWh per kWp a year. An off-grid system that has to get through December does better at about 63°.
What time is sunrise and sunset in Langley Park today?
On 24 October 2026 the sun rises at 07:26 and sets at 18:16 local time (UTC−4), giving 10 h 50 min of daylight. Solar noon is at 12:51.
How many peak sun hours does Langley Park get?
On a flat surface 4.1 hours a day averaged over the year, from 1.8 in December to 6.2 in June. Panels tilted at 70° receive 3.5 sun hours a day in June.
How high does the sun get in Langley Park?
At solar noon the sun stands 74.5° above the horizon on the June solstice and 27.6° on the December solstice.
Is Langley Park a good place for solar panels?
With 4.1 peak sun hours a day on flat ground, Langley Park ranks joint 1685th of 3,121 places in the United States for sunshine. A 1 kWp array at the best angle (34°) makes about 1,432 kWh a year here, 6% less than the average place in the United States.

Places near Langley Park

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Sun positions: NREL Solar Position Algorithm. Climate: NASA POWER monthly climatology (NASA Langley Research Center). Forecast: Deutscher Wetterdienst, ICON-EU (CC BY 4.0), processed. Places: GeoNames (CC BY 4.0). Time zones: IANA. Sources and licences.