Solarposition.org

Toyama · Japan · 36.57° N · 136.91° E

Solar position in Nanto-shi

Sun position, daylight and the best solar panel angle for Nanto-shi — computed for 36.57° N, 136.91° E, 70 m above sea level.

Sunrise today06:08104° ESE
Sunset today17:03255° WSW
Best panel angle28°year-round, facing south
Off-grid angle56°best for the darkest month

The sun right now

Azimuth180.0°
Elevation41.4°
At solar noon, 11:36Open on the sun map

Sun in Nanto-shi today

Sunday, 25 October 2026 · local time UTC+9

EventTimeDirection / height
Astronomical dawn04:41sun 18° below horizon
Nautical dawn05:1112° below
Civil dawn05:426° below
Sunrise06:08104° ESE
Golden hour ends06:44sun 6° up
Solar noon11:3641.4° high
Golden hour starts16:28sun 6° up
Sunset17:03255° WSW
Civil dusk17:306° below
Nautical dusk18:0012° below
Astronomical dusk18:3018° below
Day length10 h 56 min

Sun path diagram for Nanto-shi

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 solstice5678910111213141516171819EquinoxDecember solstice8910111213141516Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 76.9° at solar noon in Nanto-shi; on the December solstice only 30.0°. Sunrise swings from 60° ENE in June to 119° ESE in December — a 59° 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
January07:0112:0317:0510 h 04 min33.5°
February06:3312:0617:3811 h 05 min42.9°
March05:5511:5918:0412 h 09 min53.6°
April05:1111:5118:3113 h 20 min65.3°
May04:4111:4818:5614 h 16 min73.6°
June04:3411:5419:1314 h 40 min76.9°
July04:4911:5819:0714 h 18 min73.9°
August05:1411:5518:3613 h 22 min65.6°
September05:3911:4517:5112 h 12 min54.2°
October06:0411:3617:0811 h 04 min42.8°
November06:3511:3716:4010 h 05 min33.6°
December07:0011:5016:409 h 40 min30.0°

A year of daylight in Nanto-shi

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 Nanto-shi

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: 1180 kWh per kWp.

56°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 56°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°106991%1.233.5×
15°115598%1.562.8×
28° year-round best1180100%1.772.4×
30°1180100%1.802.3×
37° = latitude117099%1.882.2×
45°114297%1.942.0×
56° off-grid best107591%1.971.8×
60°104388%1.961.7×
70°94880%1.921.6×
90°70260%1.691.7×

A fixed array in Nanto-shi produces the most over a year at 28°. The design month for an off-grid system is December: at 56° it makes 1.97 kWh per kWp a day, 11% more than at 28°, and costs 9% of the yearly total. Why steep panels win winter.

Off-grid solar in Nanto-shi at 70°

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

012345January: 2.03 (70°)2.0JanFebruary: 2.52 (70°)2.5FebMarch: 3.03 (70°)3.0MarApril: 3.03 (70°)3.0AprMay: 2.78 (70°)2.8MayJune: 2.42 (70°)2.4JunJuly: 2.31 (70°)2.3JulAugust: 2.79 (70°)2.8AugSeptember: 2.80 (70°)2.8SepOctober: 2.97 (70°)3.0OctNovember: 2.59 (70°)2.6NovDecember: 1.92 (70°)1.9Dec28°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 28°Mean temp.
January1.712.272.031.941.0 °C
February2.462.822.522.631.2 °C
March3.583.433.033.534.1 °C
April4.593.493.034.089.3 °C
May5.233.282.784.2614.6 °C
June4.982.922.423.8718.9 °C
July4.682.832.313.6122.8 °C
August4.913.422.794.0024.3 °C
September3.873.382.803.4620.8 °C
October3.103.492.973.1615.2 °C
November2.162.982.592.469.5 °C
December1.512.181.921.774.0 °C
Year3.57 avg3.04 avg948 kWh1180 kWh

Sizing example. To run a 1 kWh-per-day load through December on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 610 Wp of panels at 70°, versus 670 Wp at 28°. The steep array is 8% smaller for the same winter. Size your own system.

Row spacing in Nanto-shi

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.

4.4 mrow pitch at 70°

3.6 mrow pitch at 28°

Row spacing calculator

How Nanto-shi compares in Japan

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

1033rdof 1,216 places in Japan for sunshine, shared: 3.57 peak sun hours a day on flat ground.

−8%solar energy a year compared with the average place in Japan: 1,180 against 1,284 kWh per kWp.

+5 mindaylight on the longest day, compared with Tokyo: 14 h 40 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); Nanto-shi ranks joint 1033rd. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.92 kWh a day here, against 2.14 kWh on average in Japan. The shortest day lasts 9 h 40 min, −5 min compared with Tokyo.

The sunniest places in Japan

Solar forecast for Nanto-shi, 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 Nanto-shi

What is the best solar panel angle in Nanto-shi?
For a fixed array facing south, the best year-round tilt in Nanto-shi is 28°, worth about 1180 kWh per kWp a year. An off-grid system that has to get through December does better at about 56°.
What time is sunrise and sunset in Nanto-shi today?
On 25 October 2026 the sun rises at 06:08 and sets at 17:03 local time (UTC+9), giving 10 h 56 min of daylight. Solar noon is at 11:36.
How many peak sun hours does Nanto-shi get?
On a flat surface 3.6 hours a day averaged over the year, from 1.5 in December to 5.2 in May. Panels tilted at 70° receive 2.2 sun hours a day in December.
How high does the sun get in Nanto-shi?
At solar noon the sun stands 76.9° above the horizon on the June solstice and 30.0° on the December solstice.
Is Nanto-shi a good place for solar panels?
With 3.6 peak sun hours a day on flat ground, Nanto-shi ranks joint 1033rd of 1,216 places in Japan for sunshine. A 1 kWp array at the best angle (28°) makes about 1,180 kWh a year here, 8% less than the average place in Japan.

Places near Nanto-shi

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.