Osaka · Japan · 34.79° N · 135.69° E
Solar position in Katano
Sun position, daylight and the best solar panel angle for Katano — computed for 34.79° N, 135.69° E, 31 m above sea level.
The sun right now
Sun in Katano today
Sunday, 25 October 2026 · local time UTC+9
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:46 | sun 18° below horizon |
| Nautical dawn | 05:15 | 12° below |
| Civil dawn | 05:45 | 6° below |
| Sunrise | 06:11 | 104° ESE |
| Golden hour ends | 06:45 | sun 6° up |
| Solar noon | 11:41 | 43.2° high |
| Golden hour starts | 16:36 | sun 6° up |
| Sunset | 17:11 | 256° WSW |
| Civil dusk | 17:36 | 6° below |
| Nautical dusk | 18:06 | 12° below |
| Astronomical dusk | 18:35 | 18° below |
| Day length | 11 h 00 min | |
Sun path diagram for Katano
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 78.6° at solar noon in Katano; on the December solstice only 31.8°. Sunrise swings from 60° ENE in June to 118° ESE in December — a 58° 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 | 07:02 | 12:08 | 17:14 | 10 h 12 min | 35.3° |
| February | 06:36 | 12:11 | 17:45 | 11 h 09 min | 44.6° |
| March | 06:00 | 12:04 | 18:09 | 12 h 09 min | 55.4° |
| April | 05:18 | 11:56 | 18:33 | 13 h 15 min | 67.0° |
| May | 04:50 | 11:53 | 18:57 | 14 h 07 min | 75.4° |
| June | 04:44 | 11:58 | 19:13 | 14 h 30 min | 78.6° |
| July | 04:58 | 12:03 | 19:08 | 14 h 09 min | 75.7° |
| August | 05:21 | 12:00 | 18:38 | 13 h 17 min | 67.3° |
| September | 05:44 | 11:50 | 17:56 | 12 h 12 min | 55.9° |
| October | 06:07 | 11:41 | 17:15 | 11 h 08 min | 44.6° |
| November | 06:36 | 11:42 | 16:49 | 10 h 13 min | 35.3° |
| December | 07:00 | 11:55 | 16:49 | 9 h 49 min | 31.8° |
A year of daylight in Katano
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 Katano
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
30°collects the most energy over a year: 1268 kWh per kWp.
54°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° | 1130 | 89% | 1.65 | 2.6× |
| 15° | 1233 | 97% | 2.18 | 2.0× |
| 30° year-round best | 1268 | 100% | 2.57 | 1.6× |
| 35° = latitude | 1264 | 100% | 2.67 | 1.5× |
| 45° | 1233 | 97% | 2.80 | 1.4× |
| 54° off-grid best | 1179 | 93% | 2.86 | 1.3× |
| 60° | 1131 | 89% | 2.87 | 1.3× |
| 70° | 1029 | 81% | 2.82 | 1.5× |
| 90° | 764 | 60% | 2.48 | 1.9× |
A fixed array in Katano produces the most over a year at 30°. The design month for an off-grid system is December: at 54° it makes 2.86 kWh per kWp a day, 12% more than at 30°, and costs 7% of the yearly total. Why steep panels win winter.
Off-grid solar in Katano at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 30° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 30° | Mean temp. |
|---|---|---|---|---|---|
| January | 2.19 | 3.17 | 2.83 | 2.68 | 3.0 °C |
| February | 2.86 | 3.39 | 3.01 | 3.14 | 3.9 °C |
| March | 3.88 | 3.72 | 3.27 | 3.84 | 6.8 °C |
| April | 4.76 | 3.52 | 3.02 | 4.16 | 11.9 °C |
| May | 5.22 | 3.14 | 2.63 | 4.13 | 16.8 °C |
| June | 4.77 | 2.73 | 2.23 | 3.60 | 20.8 °C |
| July | 4.85 | 2.83 | 2.28 | 3.65 | 24.8 °C |
| August | 5.11 | 3.43 | 2.78 | 4.07 | 25.7 °C |
| September | 4.02 | 3.44 | 2.84 | 3.56 | 22.3 °C |
| October | 3.24 | 3.61 | 3.05 | 3.31 | 16.6 °C |
| November | 2.50 | 3.55 | 3.07 | 2.95 | 11.0 °C |
| December | 2.02 | 3.19 | 2.82 | 2.57 | 5.5 °C |
| Year | 3.79 avg | 3.31 avg | 1029 kWh | 1268 kWh |
Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 530 Wp of panels at 70°, versus 460 Wp at 30°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Katano
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.
4.1 mrow pitch at 70°
3.6 mrow pitch at 30°
How Katano compares in Japan
Against the other 1,215 places in Japan with climate data, for a fixed array at its best angle.
807thof 1,216 places in Japan for sunshine, shared: 3.79 peak sun hours a day on flat ground.
−1%solar energy a year compared with the average place in Japan: 1,268 against 1,284 kWh per kWp.
−5 mindaylight on the longest day, compared with Tokyo: 14 h 30 min against 14 h 35 min.
30°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); Katano ranks joint 807th. In its darkest month, June, 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 49 min, +5 min compared with Tokyo.
Solar forecast for Katano, 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 Katano
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Places near Katano
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A free, live card for Katano: 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.