Solarposition.org

Iwate · Japan · 39.02° N · 141.65° E

Solar position in Rikuzen-Takata

Sun position, daylight and the best solar panel angle for Rikuzen-Takata — computed for 39.02° N, 141.65° E, 44 m above sea level.

Sunrise today05:52105° ESE
Sunset today16:41255° WSW
Best panel angle35°year-round, facing south
Off-grid angle54°best for the darkest month

The sun right now

Azimuth180.0°
Elevation38.9°
At solar noon, 11:17Open on the sun map

Sun in Rikuzen-Takata today

Sunday, 25 October 2026 · local time UTC+9

EventTimeDirection / height
Astronomical dawn04:23sun 18° below horizon
Nautical dawn04:5412° below
Civil dawn05:256° below
Sunrise05:52105° ESE
Golden hour ends06:29sun 6° up
Solar noon11:1738.9° high
Golden hour starts16:04sun 6° up
Sunset16:41255° WSW
Civil dusk17:096° below
Nautical dusk17:4012° below
Astronomical dusk18:1118° below
Day length10 h 49 min

Sun path diagram for Rikuzen-Takata

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 74.4° at solar noon in Rikuzen-Takata; 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
January06:4811:4416:419 h 53 min31.1°
February06:1711:4717:1610 h 59 min40.4°
March05:3611:4017:4512 h 10 min51.2°
April04:4911:3218:1513 h 27 min62.8°
May04:1611:3018:4414 h 28 min71.2°
June04:0711:3519:0214 h 55 min74.4°
July04:2411:3918:5414 h 31 min71.5°
August04:5111:3618:2013 h 29 min63.1°
September05:1911:2617:3212 h 13 min51.7°
October05:4811:1716:4710 h 59 min40.3°
November06:2211:1816:159 h 53 min31.1°
December06:4811:3116:149 h 26 min27.6°

A year of daylight in Rikuzen-Takata

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 Rikuzen-Takata

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: 1264 kWh per kWp.

54°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 35°Best worst-month 54°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°107885%1.432.9×
15°120295%2.012.1×
30°1260100%2.461.7×
35° year-round best1264100%2.581.6×
39° = latitude1262100%2.661.6×
45°124999%2.761.5×
54° off-grid best121096%2.851.3×
60°117093%2.881.4×
70°108286%2.861.5×
90°83766%2.592.1×

A fixed array in Rikuzen-Takata produces the most over a year at 35°. The design month for an off-grid system is December: at 54° it makes 2.85 kWh per kWp a day, 11% more than at 35°, and costs 4% of the yearly total. Why steep panels win winter.

Off-grid solar in Rikuzen-Takata at 70°

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

012345January: 3.31 (70°)3.3JanFebruary: 3.52 (70°)3.5FebMarch: 3.45 (70°)3.5MarApril: 3.24 (70°)3.2AprMay: 2.80 (70°)2.8MayJune: 2.50 (70°)2.5JunJuly: 2.29 (70°)2.3JulAugust: 2.63 (70°)2.6AugSeptember: 2.85 (70°)2.8SepOctober: 3.06 (70°)3.1OctNovember: 3.10 (70°)3.1NovDecember: 2.86 (70°)2.9Dec35°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 35°Mean temp.
January snow2.073.663.312.970.3 °C
February snow2.823.903.523.460.2 °C
March3.763.883.453.923.2 °C
April4.693.723.244.237.9 °C
May5.063.292.804.0712.9 °C
June5.002.992.503.8017.1 °C
July4.442.792.293.3720.8 °C
August4.433.202.633.5922.6 °C
September3.743.422.853.4319.7 °C
October2.983.583.063.2414.4 °C
November2.223.553.102.938.7 °C
December1.773.212.862.583.3 °C
Year3.58 avg3.43 avg1082 kWh1264 kWh

Sizing example. To run a 1 kWh-per-day load through July on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 510 Wp of panels at 70°, versus 460 Wp at 35°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Rikuzen-Takata

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°

4.2 mrow pitch at 35°

Row spacing calculator

How Rikuzen-Takata compares in Japan

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

1007thof 1,216 places in Japan for sunshine, shared: 3.58 peak sun hours a day on flat ground.

−2%solar energy a year compared with the average place in Japan: 1,264 against 1,284 kWh per kWp.

+20 mindaylight on the longest day, compared with Tokyo: 14 h 55 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); Rikuzen-Takata ranks joint 1007th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.29 kWh a day here, against 2.14 kWh on average in Japan. The shortest day lasts 9 h 26 min, −19 min compared with Tokyo.

The sunniest places in Japan

Solar forecast for Rikuzen-Takata, 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 Rikuzen-Takata

What is the best solar panel angle in Rikuzen-Takata?
For a fixed array facing south, the best year-round tilt in Rikuzen-Takata is 35°, worth about 1264 kWh per kWp a year. An off-grid system that has to get through December does better at about 54°.
What time is sunrise and sunset in Rikuzen-Takata today?
On 25 October 2026 the sun rises at 05:52 and sets at 16:41 local time (UTC+9), giving 10 h 49 min of daylight. Solar noon is at 11:17.
How many peak sun hours does Rikuzen-Takata get?
On a flat surface 3.6 hours a day averaged over the year, from 1.8 in December to 5.1 in May. Panels tilted at 70° receive 2.8 sun hours a day in July.
How high does the sun get in Rikuzen-Takata?
At solar noon the sun stands 74.4° above the horizon on the June solstice and 27.6° on the December solstice.
Is Rikuzen-Takata a good place for solar panels?
With 3.6 peak sun hours a day on flat ground, Rikuzen-Takata ranks joint 1007th of 1,216 places in Japan for sunshine. A 1 kWp array at the best angle (35°) makes about 1,264 kWh a year here, 2% less than the average place in Japan.

Places near Rikuzen-Takata

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.