Hokkaido · Japan · 43.55° N · 144.97° E
Solar position in Nakashibetsu
Sun position, daylight and the best solar panel angle for Nakashibetsu — computed for 43.55° N, 144.97° E, 31 m above sea level.
The sun right now
Sun in Nakashibetsu today
Sunday, 25 October 2026 · local time UTC+9
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:10 | sun 18° below horizon |
| Nautical dawn | 04:43 | 12° below |
| Civil dawn | 05:16 | 6° below |
| Sunrise | 05:46 | 106° ESE |
| Golden hour ends | 06:26 | sun 6° up |
| Solar noon | 11:03 | 34.4° high |
| Golden hour starts | 15:41 | sun 6° up |
| Sunset | 16:21 | 254° WSW |
| Civil dusk | 16:51 | 6° below |
| Nautical dusk | 17:24 | 12° below |
| Astronomical dusk | 17:57 | 18° below |
| Day length | 10 h 36 min | |
Sun path diagram for Nakashibetsu
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 69.9° at solar noon in Nakashibetsu; on the December solstice only 23.1°. Sunrise swings from 56° NE in June to 122° ESE in December — a 67° 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 | 06:46 | 11:31 | 16:16 | 9 h 29 min | 26.6° |
| February | 06:10 | 11:33 | 16:57 | 10 h 47 min | 35.9° |
| March | 05:22 | 11:27 | 17:32 | 12 h 10 min | 46.7° |
| April | 04:28 | 11:19 | 18:09 | 13 h 41 min | 58.3° |
| May | 03:50 | 11:16 | 18:43 | 14 h 54 min | 66.6° |
| June | 03:38 | 11:21 | 19:04 | 15 h 26 min | 69.9° |
| July | 03:57 | 11:26 | 18:54 | 14 h 57 min | 66.9° |
| August | 04:31 | 11:23 | 18:14 | 13 h 44 min | 58.6° |
| September | 05:05 | 11:13 | 17:20 | 12 h 15 min | 47.2° |
| October | 05:41 | 11:04 | 16:27 | 10 h 47 min | 35.8° |
| November | 06:20 | 11:05 | 15:50 | 9 h 30 min | 26.6° |
| December | 06:49 | 11:17 | 15:46 | 8 h 56 min | 23.1° |
A year of daylight in Nakashibetsu
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 Nakashibetsu
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
40°collects the most energy over a year: 1258 kWh per kWp.
58°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° | 1021 | 81% | 1.20 | 3.4× |
| 15° | 1162 | 92% | 1.81 | 2.3× |
| 30° | 1242 | 99% | 2.33 | 1.8× |
| 40° year-round best | 1258 | 100% | 2.61 | 1.6× |
| 44° = latitude | 1256 | 100% | 2.70 | 1.5× |
| 45° | 1255 | 100% | 2.72 | 1.5× |
| 58° off-grid best | 1212 | 96% | 2.94 | 1.4× |
| 60° | 1201 | 95% | 2.96 | 1.4× |
| 70° | 1129 | 90% | 3.02 | 1.5× |
| 90° | 913 | 73% | 2.92 | 2.2× |
A fixed array in Nakashibetsu produces the most over a year at 40°. The design month for an off-grid system is December: at 58° it makes 2.94 kWh per kWp a day, 13% more than at 40°, and costs 4% of the yearly total. Why steep panels win winter.
Off-grid solar in Nakashibetsu at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 40° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 40° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 1.73 | 3.54 | 3.27 | 2.88 | -5.6 °C |
| February snow | 2.59 | 4.18 | 3.86 | 3.63 | -6.0 °C |
| March snow | 3.56 | 4.21 | 3.82 | 4.05 | -2.0 °C |
| April | 4.46 | 3.81 | 3.38 | 4.18 | 2.8 °C |
| May | 4.83 | 3.38 | 2.94 | 3.99 | 7.5 °C |
| June | 4.83 | 3.09 | 2.63 | 3.72 | 12.0 °C |
| July | 4.48 | 2.99 | 2.51 | 3.47 | 15.9 °C |
| August | 4.01 | 3.11 | 2.59 | 3.32 | 18.1 °C |
| September | 3.58 | 3.55 | 3.00 | 3.47 | 16.0 °C |
| October | 2.77 | 3.71 | 3.22 | 3.32 | 10.6 °C |
| November | 1.85 | 3.30 | 2.93 | 2.76 | 4.2 °C |
| December snow | 1.48 | 3.31 | 3.02 | 2.61 | -2.6 °C |
| Year | 3.35 avg | 3.51 avg | 1129 kWh | 1258 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 470 Wp of panels at 70°, versus 450 Wp at 40°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Nakashibetsu
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.
5.9 mrow pitch at 70°
5.1 mrow pitch at 40°
How Nakashibetsu compares in Japan
Against the other 1,215 places in Japan with climate data, for a fixed array at its best angle.
1155thof 1,216 places in Japan for sunshine, shared: 3.35 peak sun hours a day on flat ground.
−2%solar energy a year compared with the average place in Japan: 1,258 against 1,284 kWh per kWp.
+51 mindaylight on the longest day, compared with Tokyo: 15 h 26 min against 14 h 35 min.
40°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); Nakashibetsu ranks joint 1155th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.51 kWh a day here, against 2.14 kWh on average in Japan. The shortest day lasts 8 h 56 min, −48 min compared with Tokyo.
Solar forecast for Nakashibetsu, 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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A free, live card for Nakashibetsu: 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.