Solarposition.org

Fukushima · Japan · 37.49° N · 139.95° E

Solar position in Aizu-Wakamatsu

Sun position, daylight and the best solar panel angle for Aizu-Wakamatsu — computed for 37.49° N, 139.95° E, 238 m above sea level.

Sunrise today05:57105° ESE
Sunset today16:50255° WSW
Best panel angle32°year-round, facing south
Off-grid angle61°best for the darkest month

The sun right now

Azimuth180.0°
Elevation40.5°
At solar noon, 11:24Open on the sun map

Sun in Aizu-Wakamatsu today

Sunday, 25 October 2026 · local time UTC+9

EventTimeDirection / height
Astronomical dawn04:29sun 18° below horizon
Nautical dawn05:0012° below
Civil dawn05:306° below
Sunrise05:57105° ESE
Golden hour ends06:33sun 6° up
Solar noon11:2440.5° high
Golden hour starts16:14sun 6° up
Sunset16:50255° WSW
Civil dusk17:176° below
Nautical dusk17:4712° below
Astronomical dusk18:1818° below
Day length10 h 53 min

Sun path diagram for Aizu-Wakamatsu

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 75.9° at solar noon in Aizu-Wakamatsu; on the December solstice only 29.1°. Sunrise swings from 59° ENE in June to 119° ESE in December — a 60° 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
January06:5111:5116:5110 h 00 min32.6°
February06:2211:5417:2511 h 03 min41.9°
March05:4311:4717:5212 h 09 min52.7°
April04:5811:3918:2013 h 23 min64.3°
May04:2611:3618:4714 h 20 min72.7°
June04:1911:4119:0414 h 45 min75.9°
July04:3511:4618:5714 h 23 min73.0°
August05:0011:4318:2513 h 25 min64.7°
September05:2611:3317:3912 h 13 min53.3°
October05:5311:2416:5511 h 02 min41.9°
November06:2511:2516:2610 h 00 min32.6°
December06:5011:3816:259 h 34 min29.1°

A year of daylight in Aizu-Wakamatsu

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 Aizu-Wakamatsu

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

32°collects the most energy over a year: 1212 kWh per kWp.

61°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 32°Best worst-month 61°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°106688%1.383.1×
15°117096%1.852.4×
30°1211100%2.221.9×
32° year-round best1212100%2.261.8×
37° = latitude1209100%2.351.7×
45°118998%2.461.6×
60°110591%2.561.4×
61° off-grid best109791%2.571.3×
70°101784%2.551.5×
90°78265%2.342.1×

A fixed array in Aizu-Wakamatsu produces the most over a year at 32°. The design month for an off-grid system is December: at 61° it makes 2.57 kWh per kWp a day, 14% more than at 32°, and costs 9% of the yearly total. Why steep panels win winter.

Off-grid solar in Aizu-Wakamatsu at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 32° (year-round best).

012345January: 2.82 (70°)2.8JanFebruary: 3.28 (70°)3.3FebMarch: 3.23 (70°)3.2MarApril: 3.06 (70°)3.1AprMay: 2.78 (70°)2.8MayJune: 2.41 (70°)2.4JunJuly: 2.23 (70°)2.2JulAugust: 2.68 (70°)2.7AugSeptember: 2.81 (70°)2.8SepOctober: 2.86 (70°)2.9OctNovember: 2.79 (70°)2.8NovDecember: 2.55 (70°)2.6Dec32°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 32°Mean temp.
January snow1.883.092.822.47-2.7 °C
February snow2.643.613.283.11-2.3 °C
March3.643.603.233.721.4 °C
April4.543.513.064.077.4 °C
May5.173.272.784.1713.6 °C
June4.922.902.413.7618.0 °C
July4.432.742.233.3822.0 °C
August4.643.272.683.7623.0 °C
September3.783.362.813.4418.7 °C
October2.913.322.863.0612.2 °C
November2.143.162.792.656.0 °C
December snow1.682.842.552.260.4 °C
Year3.54 avg3.22 avg1017 kWh1212 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 530 Wp of panels at 70°, versus 520 Wp at 32°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Aizu-Wakamatsu

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.

4.6 mrow pitch at 70°

3.9 mrow pitch at 32°

Row spacing calculator

How Aizu-Wakamatsu compares in Japan

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

1062ndof 1,216 places in Japan for sunshine, shared: 3.54 peak sun hours a day on flat ground.

−6%solar energy a year compared with the average place in Japan: 1,212 against 1,284 kWh per kWp.

+11 mindaylight on the longest day, compared with Tokyo: 14 h 45 min against 14 h 35 min.

32°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); Aizu-Wakamatsu ranks joint 1062nd. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.23 kWh a day here, against 2.14 kWh on average in Japan. The shortest day lasts 9 h 34 min, −10 min compared with Tokyo.

The sunniest places in Japan

Solar forecast for Aizu-Wakamatsu, 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 Aizu-Wakamatsu

What is the best solar panel angle in Aizu-Wakamatsu?
For a fixed array facing south, the best year-round tilt in Aizu-Wakamatsu is 32°, worth about 1212 kWh per kWp a year. An off-grid system that has to get through December does better at about 61°.
What time is sunrise and sunset in Aizu-Wakamatsu today?
On 25 October 2026 the sun rises at 05:57 and sets at 16:50 local time (UTC+9), giving 10 h 53 min of daylight. Solar noon is at 11:24.
How many peak sun hours does Aizu-Wakamatsu get?
On a flat surface 3.5 hours a day averaged over the year, from 1.7 in December to 5.2 in May. Panels tilted at 70° receive 2.7 sun hours a day in July.
How high does the sun get in Aizu-Wakamatsu?
At solar noon the sun stands 75.9° above the horizon on the June solstice and 29.1° on the December solstice.
Is Aizu-Wakamatsu a good place for solar panels?
With 3.5 peak sun hours a day on flat ground, Aizu-Wakamatsu ranks joint 1062nd of 1,216 places in Japan for sunshine. A 1 kWp array at the best angle (32°) makes about 1,212 kWh a year here, 6% less than the average place in Japan.

Places near Aizu-Wakamatsu

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.