Solarposition.org

Yamaguchi · Japan · 34.38° N · 131.20° E

Solar position in Nagato

Sun position, daylight and the best solar panel angle for Nagato — computed for 34.38° N, 131.20° E, 4 m above sea level.

Sunrise today06:28104° ESE
Sunset today17:29256° WSW
Best panel angle28°year-round, facing south
Off-grid angle55°best for the darkest month

The sun right now

Azimuth180.0°
Elevation43.6°
At solar noon, 11:59Open on the sun map

Sun in Nagato today

Sunday, 25 October 2026 · local time UTC+9

EventTimeDirection / height
Astronomical dawn05:04sun 18° below horizon
Nautical dawn05:3312° below
Civil dawn06:026° below
Sunrise06:28104° ESE
Golden hour ends07:03sun 6° up
Solar noon11:5943.6° high
Golden hour starts16:55sun 6° up
Sunset17:29256° WSW
Civil dusk17:556° below
Nautical dusk18:2412° below
Astronomical dusk18:5318° below
Day length11 h 01 min

Sun path diagram for Nagato

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 solstice678910111213141516171819EquinoxDecember solstice891011121314151617Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 79.1° at solar noon in Nagato; on the December solstice only 32.2°. Sunrise swings from 61° ENE in June to 118° ESE in December — a 58° 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
January07:1912:2617:3310 h 14 min35.7°
February06:5412:2918:0311 h 09 min45.1°
March06:1812:2218:2712 h 09 min55.8°
April05:3712:1418:5113 h 14 min67.5°
May05:0912:1119:1414 h 05 min75.8°
June05:0312:1619:3014 h 27 min79.1°
July05:1712:2119:2514 h 07 min76.1°
August05:4012:1818:5613 h 16 min67.8°
September06:0212:0818:1412 h 12 min56.4°
October06:2511:5917:3411 h 09 min45.0°
November06:5312:0017:0710 h 14 min35.7°
December07:1712:1317:089 h 51 min32.2°

A year of daylight in Nagato

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 Nagato

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

28°collects the most energy over a year: 1227 kWh per kWp.

55°gives the most in the darkest month — the one an off-grid system is sized for.

50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 28°Best worst-month 55°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°111791%1.502.9×
15°120498%1.882.3×
28° year-round best1227100%2.132.0×
30°1226100%2.161.9×
34° = latitude1221100%2.211.9×
45°118396%2.311.7×
55° off-grid best111891%2.341.5×
60°107688%2.331.5×
70°97479%2.271.4×
90°71458%1.981.9×

A fixed array in Nagato produces the most over a year at 28°. The design month for an off-grid system is December: at 55° it makes 2.34 kWh per kWp a day, 10% more than at 28°, and costs 9% of the yearly total. Why steep panels win winter.

Off-grid solar in Nagato at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 28° (year-round best).

012345January: 2.28 (70°)2.3JanFebruary: 2.72 (70°)2.7FebMarch: 3.12 (70°)3.1MarApril: 3.02 (70°)3.0AprMay: 2.66 (70°)2.7MayJune: 2.22 (70°)2.2JunJuly: 2.24 (70°)2.2JulAugust: 2.75 (70°)2.7AugSeptember: 2.82 (70°)2.8SepOctober: 3.15 (70°)3.1OctNovember: 2.78 (70°)2.8NovDecember: 2.27 (70°)2.3Dec28°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 28°Mean temp.
January1.982.612.282.216.8 °C
February2.763.112.722.877.5 °C
March3.853.593.123.699.8 °C
April4.823.543.024.1813.6 °C
May5.323.182.664.2317.7 °C
June4.762.712.223.6221.2 °C
July4.812.782.243.6425.1 °C
August5.103.402.754.0626.7 °C
September4.053.432.823.5523.7 °C
October3.443.753.153.4219.2 °C
November2.463.262.782.7114.4 °C
December1.862.612.272.139.2 °C
Year3.77 avg3.17 avg974 kWh1227 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 530 Wp of panels at 70°, versus 550 Wp at 28°. The steep array is 4% smaller for the same winter. Size your own system.

Row spacing in Nagato

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.

4.1 mrow pitch at 70°

3.5 mrow pitch at 28°

Row spacing calculator

How Nagato compares in Japan

Against the other 1,215 places in Japan with climate data, for a fixed array at its best angle.

863rdof 1,216 places in Japan for sunshine, shared: 3.77 peak sun hours a day on flat ground.

−4%solar energy a year compared with the average place in Japan: 1,227 against 1,284 kWh per kWp.

−7 mindaylight on the longest day, compared with Tokyo: 14 h 27 min against 14 h 35 min.

28°best year-round tilt here; across Japan it runs from 17° in Miyakojima to 41° in Kushiro.

Of the 1,216 places in Japan, Miyakojima gets the most sun (4.34 peak sun hours a day) and Wakkanai and one other place the least (3.17); Nagato ranks joint 863rd. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.22 kWh a day here, against 2.14 kWh on average in Japan. The shortest day lasts 9 h 51 min, +7 min compared with Tokyo.

The sunniest places in Japan

Solar forecast for Nagato, 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 Nagato

What is the best solar panel angle in Nagato?
For a fixed array facing south, the best year-round tilt in Nagato is 28°, worth about 1227 kWh per kWp a year. An off-grid system that has to get through December does better at about 55°.
What time is sunrise and sunset in Nagato today?
On 25 October 2026 the sun rises at 06:28 and sets at 17:29 local time (UTC+9), giving 11 h 01 min of daylight. Solar noon is at 11:59.
How many peak sun hours does Nagato get?
On a flat surface 3.8 hours a day averaged over the year, from 1.9 in December to 5.3 in May. Panels tilted at 70° receive 2.7 sun hours a day in June.
How high does the sun get in Nagato?
At solar noon the sun stands 79.1° above the horizon on the June solstice and 32.2° on the December solstice.
Is Nagato a good place for solar panels?
With 3.8 peak sun hours a day on flat ground, Nagato ranks joint 863rd of 1,216 places in Japan for sunshine. A 1 kWp array at the best angle (28°) makes about 1,227 kWh a year here, 4% less than the average place in Japan.

Places near Nagato

All places in Japan

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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.