Solarposition.org

Tokyo · Japan · 35.70° N · 139.64° E

Solar position in Asagaya-minami

Sun position, daylight and the best solar panel angle for Asagaya-minami — computed for 35.70° N, 139.64° E, 48 m above sea level.

Sunrise today05:56104° ESE
Sunset today16:54256° WSW
Best panel angle35°year-round, facing south
Off-grid angle41°best for the darkest month

The sun right now

Azimuth180.0°
Elevation42.3°
At solar noon, 11:25Open on the sun map

Sun in Asagaya-minami today

Sunday, 25 October 2026 · local time UTC+9

EventTimeDirection / height
Astronomical dawn04:30sun 18° below horizon
Nautical dawn05:0012° below
Civil dawn05:306° below
Sunrise05:56104° ESE
Golden hour ends06:31sun 6° up
Solar noon11:2542.3° high
Golden hour starts16:19sun 6° up
Sunset16:54256° WSW
Civil dusk17:206° below
Nautical dusk17:5012° below
Astronomical dusk18:1918° below
Day length10 h 58 min

Sun path diagram for Asagaya-minami

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 solstice56789101112131415161718EquinoxDecember solstice78910111213141516Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 77.7° at solar noon in Asagaya-minami; on the December solstice only 30.9°. 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
January06:4811:5216:5610 h 08 min34.4°
February06:2211:5517:2811 h 07 min43.7°
March05:4411:4817:5312 h 09 min54.5°
April05:0111:4018:1913 h 18 min66.1°
May04:3211:3818:4314 h 12 min74.5°
June04:2511:4319:0014 h 35 min77.7°
July04:4011:4718:5414 h 14 min74.8°
August05:0411:4418:2413 h 19 min66.4°
September05:2811:3417:4012 h 12 min55.0°
October05:5211:2516:5811 h 06 min43.7°
November06:2211:2716:3110 h 09 min34.4°
December06:4711:3916:319 h 44 min30.9°

A year of daylight in Asagaya-minami

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 Asagaya-minami

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

35°collects the most energy over a year: 1354 kWh per kWp.

41°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 35°Best worst-month 41°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearOctober kWh/kWp/dayBest ÷ worst month
0°115385%2.482.1×
15°128895%2.891.6×
30°1350100%3.141.3×
35° year-round best1354100%3.191.3×
36° = latitude1353100%3.191.3×
41° off-grid best134799%3.211.3×
45°133599%3.211.4×
60°124592%3.101.7×
70°114685%2.922.0×
90°87365%2.352.8×

A fixed array in Asagaya-minami produces the most over a year at 35°. The design month for an off-grid system is October: at 41° it makes 3.21 kWh per kWp a day, and costs 1% of the yearly total. Why steep panels win winter.

Off-grid solar in Asagaya-minami at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 35° (year-round best).

012345January: 4.27 (70°)4.3JanFebruary: 3.88 (70°)3.9FebMarch: 3.59 (70°)3.6MarApril: 3.10 (70°)3.1AprMay: 2.63 (70°)2.6MayJune: 2.18 (70°)2.2JunJuly: 2.27 (70°)2.3JulAugust: 2.74 (70°)2.7AugSeptember: 2.77 (70°)2.8SepOctober: 2.92 (70°)2.9OctNovember: 3.41 (70°)3.4NovDecember: 3.94 (70°)3.9Dec35°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 35°Mean temp.
January2.744.754.273.951.9 °C
February3.304.343.883.993.0 °C
March4.084.073.594.176.4 °C
April4.813.613.104.1811.6 °C
May5.133.142.633.9716.7 °C
June4.592.662.183.3820.5 °C
July4.742.802.273.4824.4 °C
August4.953.372.743.8925.5 °C
September3.863.352.773.4321.8 °C
October3.063.442.923.1915.9 °C
November2.593.923.413.3010.2 °C
December2.414.433.943.574.6 °C
Year3.86 avg3.66 avg1146 kWh1354 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 540 Wp of panels at 70°, versus 370 Wp at 35°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Asagaya-minami

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.

4.3 mrow pitch at 70°

3.8 mrow pitch at 35°

Row spacing calculator

How Asagaya-minami compares in Japan

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

396thof 1,216 places in Japan for sunshine, shared: 3.86 peak sun hours a day on flat ground.

+5%solar energy a year compared with the average place in Japan: 1,354 against 1,284 kWh per kWp.

±0 mindaylight on the longest day, compared with Tokyo: 14 h 35 min against 14 h 35 min.

35°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); Asagaya-minami ranks joint 396th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.18 kWh a day here, against 2.14 kWh on average in Japan. The shortest day lasts 9 h 44 min, ±0 min compared with Tokyo.

The sunniest places in Japan

Solar forecast for Asagaya-minami, 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 Asagaya-minami

What is the best solar panel angle in Asagaya-minami?
For a fixed array facing south, the best year-round tilt in Asagaya-minami is 35°, worth about 1354 kWh per kWp a year. An off-grid system that has to get through October does better at about 41°.
What time is sunrise and sunset in Asagaya-minami today?
On 25 October 2026 the sun rises at 05:56 and sets at 16:54 local time (UTC+9), giving 10 h 58 min of daylight. Solar noon is at 11:25.
How many peak sun hours does Asagaya-minami get?
On a flat surface 3.9 hours a day averaged over the year, from 2.4 in December to 5.1 in May. Panels tilted at 70° receive 2.7 sun hours a day in June.
How high does the sun get in Asagaya-minami?
At solar noon the sun stands 77.7° above the horizon on the June solstice and 30.9° on the December solstice.
Is Asagaya-minami a good place for solar panels?
With 3.9 peak sun hours a day on flat ground, Asagaya-minami ranks joint 396th of 1,216 places in Japan for sunshine. A 1 kWp array at the best angle (35°) makes about 1,354 kWh a year here, 5% more than the average place in Japan.

Places near Asagaya-minami

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.