Tochigi · Japan · 36.33° N · 139.45° E
Solar position in Ashikaga
Sun position, daylight and the best solar panel angle for Ashikaga — computed for 36.33° N, 139.45° E, 45 m above sea level.
The sun right now
Sun in Ashikaga today
Sunday, 25 October 2026 · local time UTC+9
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:31 | sun 18° below horizon |
| Nautical dawn | 05:01 | 12° below |
| Civil dawn | 05:31 | 6° below |
| Sunrise | 05:58 | 104° ESE |
| Golden hour ends | 06:33 | sun 6° up |
| Solar noon | 11:26 | 41.6° high |
| Golden hour starts | 16:18 | sun 6° up |
| Sunset | 16:54 | 255° WSW |
| Civil dusk | 17:20 | 6° below |
| Nautical dusk | 17:50 | 12° below |
| Astronomical dusk | 18:20 | 18° below |
| Day length | 10 h 56 min | |
Sun path diagram for Ashikaga
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 77.1° at solar noon in Ashikaga; on the December solstice only 30.3°. 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.
| Month | Sunrise | Solar noon | Sunset | Day length | Noon elevation |
|---|---|---|---|---|---|
| January | 06:50 | 11:53 | 16:56 | 10 h 06 min | 33.8° |
| February | 06:23 | 11:56 | 17:28 | 11 h 05 min | 43.1° |
| March | 05:45 | 11:49 | 17:54 | 12 h 09 min | 53.9° |
| April | 05:01 | 11:41 | 18:20 | 13 h 19 min | 65.5° |
| May | 04:31 | 11:38 | 18:46 | 14 h 15 min | 73.8° |
| June | 04:24 | 11:43 | 19:03 | 14 h 38 min | 77.1° |
| July | 04:40 | 11:48 | 18:56 | 14 h 17 min | 74.2° |
| August | 05:04 | 11:45 | 18:25 | 13 h 21 min | 65.8° |
| September | 05:28 | 11:35 | 17:41 | 12 h 12 min | 54.4° |
| October | 05:54 | 11:26 | 16:59 | 11 h 05 min | 43.0° |
| November | 06:24 | 11:27 | 16:30 | 10 h 06 min | 33.8° |
| December | 06:49 | 11:40 | 16:30 | 9 h 41 min | 30.3° |
A year of daylight in Ashikaga
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 Ashikaga
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
36°collects the most energy over a year: 1359 kWh per kWp.
37°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 | October kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1149 | 85% | 2.52 | 2.2× |
| 15° | 1287 | 95% | 2.96 | 1.6× |
| 30° | 1353 | 100% | 3.23 | 1.3× |
| 36° year-round best = latitude | 1359 | 100% | 3.28 | 1.3× |
| 37° off-grid best | 1359 | 100% | 3.29 | 1.3× |
| 45° | 1344 | 99% | 3.31 | 1.4× |
| 60° | 1260 | 93% | 3.20 | 1.7× |
| 70° | 1166 | 86% | 3.02 | 1.9× |
| 90° | 902 | 66% | 2.44 | 2.8× |
A fixed array in Ashikaga produces the most over a year at 36°. The design month for an off-grid system is October: at 37° it makes 3.29 kWh per kWp a day, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Ashikaga at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 36° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 36° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.63 | 4.73 | 4.29 | 3.90 | -1.1 °C |
| February snow | 3.32 | 4.62 | 4.18 | 4.15 | -0.2 °C |
| March | 4.14 | 4.17 | 3.72 | 4.30 | 3.5 °C |
| April | 4.84 | 3.67 | 3.19 | 4.25 | 9.3 °C |
| May | 5.18 | 3.21 | 2.71 | 4.03 | 15.0 °C |
| June | 4.65 | 2.73 | 2.25 | 3.43 | 19.1 °C |
| July | 4.52 | 2.74 | 2.23 | 3.33 | 23.1 °C |
| August | 4.69 | 3.26 | 2.66 | 3.70 | 24.0 °C |
| September | 3.77 | 3.28 | 2.73 | 3.36 | 19.9 °C |
| October | 3.09 | 3.53 | 3.02 | 3.28 | 13.7 °C |
| November | 2.61 | 4.04 | 3.55 | 3.43 | 7.6 °C |
| December | 2.33 | 4.31 | 3.87 | 3.53 | 1.8 °C |
| Year | 3.82 avg | 3.69 avg | 1166 kWh | 1359 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 360 Wp at 36°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Ashikaga
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.
4.4 mrow pitch at 70°
3.9 mrow pitch at 36°
How Ashikaga compares in Japan
Against the other 1,215 places in Japan with climate data, for a fixed array at its best angle.
664thof 1,216 places in Japan for sunshine, shared: 3.82 peak sun hours a day on flat ground.
+6%solar energy a year compared with the average place in Japan: 1,359 against 1,284 kWh per kWp.
+4 mindaylight on the longest day, compared with Tokyo: 14 h 38 min against 14 h 35 min.
36°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); Ashikaga ranks joint 664th. 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 41 min, −3 min compared with Tokyo.
Solar forecast for Ashikaga, 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 Ashikaga
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Places near Ashikaga
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A free, live card for Ashikaga: 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.