Fukushima · Japan · 37.43° N · 140.48° E
Solar position in Miharu
Sun position, daylight and the best solar panel angle for Miharu — computed for 37.43° N, 140.48° E, 352 m above sea level.
The sun right now
Sun in Miharu today
Sunday, 25 October 2026 · local time UTC+9
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:27 | sun 18° below horizon |
| Nautical dawn | 04:58 | 12° below |
| Civil dawn | 05:28 | 6° below |
| Sunrise | 05:55 | 105° ESE |
| Golden hour ends | 06:31 | sun 6° up |
| Solar noon | 11:21 | 40.5° high |
| Golden hour starts | 16:12 | sun 6° up |
| Sunset | 16:48 | 255° WSW |
| Civil dusk | 17:15 | 6° below |
| Nautical dusk | 17:45 | 12° below |
| Astronomical dusk | 18:16 | 18° below |
| Day length | 10 h 53 min | |
Sun path diagram for Miharu
Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.
- June solstice
- Equinox
- December solstice
- Today
On the June solstice the sun reaches 76.0° at solar noon in Miharu; on the December solstice only 29.2°. 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.
| Month | Sunrise | Solar noon | Sunset | Day length | Noon elevation |
|---|---|---|---|---|---|
| January | 06:49 | 11:49 | 16:49 | 10 h 01 min | 32.7° |
| February | 06:20 | 11:51 | 17:23 | 11 h 03 min | 42.0° |
| March | 05:40 | 11:45 | 17:50 | 12 h 09 min | 52.8° |
| April | 04:55 | 11:36 | 18:18 | 13 h 22 min | 64.4° |
| May | 04:24 | 11:34 | 18:44 | 14 h 20 min | 72.7° |
| June | 04:17 | 11:39 | 19:02 | 14 h 45 min | 76.0° |
| July | 04:33 | 11:44 | 18:55 | 14 h 22 min | 73.1° |
| August | 04:58 | 11:41 | 18:23 | 13 h 24 min | 64.7° |
| September | 05:24 | 11:31 | 17:37 | 12 h 13 min | 53.3° |
| October | 05:51 | 11:22 | 16:53 | 11 h 02 min | 41.9° |
| November | 06:23 | 11:23 | 16:24 | 10 h 01 min | 32.7° |
| December | 06:48 | 11:35 | 16:23 | 9 h 35 min | 29.2° |
A year of daylight in Miharu
Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.
Best solar panel angle in Miharu
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: 1286 kWh per kWp.
44°gives the most in the darkest month — the one an off-grid system is sized for.
- Yearly energy
- Worst-month energy
| Tilt | kWh/kWp per year | Share of best year | December kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1102 | 86% | 1.62 | 2.7× |
| 15° | 1225 | 95% | 2.25 | 1.9× |
| 30° | 1282 | 100% | 2.75 | 1.5× |
| 35° year-round best | 1286 | 100% | 2.89 | 1.5× |
| 37° = latitude | 1286 | 100% | 2.94 | 1.4× |
| 44° off-grid best | 1274 | 99% | 3.08 | 1.3× |
| 45° | 1271 | 99% | 3.10 | 1.3× |
| 60° | 1191 | 93% | 3.26 | 1.5× |
| 70° | 1103 | 86% | 3.25 | 1.7× |
| 90° | 859 | 67% | 3.00 | 2.5× |
A fixed array in Miharu produces the most over a year at 35°. The design month for an off-grid system is December: at 44° it makes 3.08 kWh per kWp a day, 7% more than at 35°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Miharu at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 35° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 35° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.24 | 4.04 | 3.69 | 3.24 | -2.6 °C |
| February snow | 2.93 | 4.22 | 3.84 | 3.65 | -2.0 °C |
| March | 3.86 | 3.90 | 3.50 | 4.02 | 1.6 °C |
| April | 4.71 | 3.64 | 3.18 | 4.21 | 7.5 °C |
| May | 5.18 | 3.26 | 2.77 | 4.11 | 13.5 °C |
| June | 4.86 | 2.85 | 2.37 | 3.64 | 17.9 °C |
| July | 4.40 | 2.71 | 2.21 | 3.29 | 21.9 °C |
| August | 4.56 | 3.21 | 2.63 | 3.65 | 22.9 °C |
| September | 3.71 | 3.30 | 2.76 | 3.37 | 18.7 °C |
| October | 2.97 | 3.42 | 2.94 | 3.18 | 12.2 °C |
| November | 2.35 | 3.61 | 3.18 | 3.06 | 6.1 °C |
| December snow | 1.96 | 3.61 | 3.25 | 2.89 | 0.5 °C |
| Year | 3.65 avg | 3.48 avg | 1103 kWh | 1286 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 410 Wp at 35°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Miharu
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.
4.5 mrow pitch at 70°
4.0 mrow pitch at 35°
How Miharu compares in Japan
Against the other 1,215 places in Japan with climate data, for a fixed array at its best angle.
958thof 1,216 places in Japan for sunshine, shared: 3.65 peak sun hours a day on flat ground.
±0%solar energy a year compared with the average place in Japan: 1,286 against 1,284 kWh per kWp.
+10 mindaylight on the longest day, compared with Tokyo: 14 h 45 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); Miharu ranks joint 958th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.21 kWh a day here, against 2.14 kWh on average in Japan. The shortest day lasts 9 h 35 min, −10 min compared with Tokyo.
Solar forecast for Miharu, next 48 hours
Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.
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Questions about the sun in Miharu
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Places near Miharu
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A free, live card for Miharu: where the sun is right now on today's path, a countdown to sunset or sunrise, the daylight change, the moon phase at night and the best panel angle.
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.