West Azerbaijan · Iran · 36.52° N · 46.21° E
Solar position in Būkān
Sun position, daylight and the best solar panel angle for Būkān — computed for 36.52° N, 46.21° E, 1365 m above sea level.
The sun right now
Sun in Būkān today
Saturday, 24 October 2026 · local time UTC+3:30
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:14 | sun 18° below horizon |
| Nautical dawn | 05:44 | 12° below |
| Civil dawn | 06:14 | 6° below |
| Sunrise | 06:40 | 104° ESE |
| Golden hour ends | 07:16 | sun 6° up |
| Solar noon | 12:09 | 41.7° high |
| Golden hour starts | 17:02 | sun 6° up |
| Sunset | 17:37 | 256° WSW |
| Civil dusk | 18:04 | 6° below |
| Nautical dusk | 18:34 | 12° below |
| Astronomical dusk | 19:04 | 18° below |
| Day length | 10 h 57 min | |
Sun path diagram for Būkān
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 76.9° at solar noon in Būkān; on the December solstice only 30.1°. 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 | 07:34 | 12:36 | 17:39 | 10 h 05 min | 33.6° |
| February | 07:06 | 12:38 | 18:11 | 11 h 05 min | 43.0° |
| March | 06:27 | 12:32 | 18:37 | 12 h 10 min | 53.8° |
| April | 05:43 | 12:23 | 19:04 | 13 h 20 min | 65.4° |
| May | 05:14 | 12:21 | 19:29 | 14 h 16 min | 73.7° |
| June | 05:07 | 12:26 | 19:46 | 14 h 39 min | 76.9° |
| July | 05:22 | 12:31 | 19:40 | 14 h 17 min | 73.9° |
| August | 05:47 | 12:28 | 19:08 | 13 h 21 min | 65.5° |
| September | 06:12 | 12:18 | 18:23 | 12 h 12 min | 54.1° |
| October | 06:37 | 12:09 | 17:41 | 11 h 04 min | 42.7° |
| November | 07:08 | 12:10 | 17:13 | 10 h 05 min | 33.6° |
| December | 07:33 | 12:23 | 17:13 | 9 h 40 min | 30.1° |
A year of daylight in Būkān
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 Būkān
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: 1752 kWh per kWp.
64°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° | 1548 | 88% | 1.90 | 3.5× |
| 15° | 1700 | 97% | 2.61 | 2.5× |
| 30° year-round best | 1752 | 100% | 3.17 | 1.9× |
| 37° = latitude | 1742 | 99% | 3.38 | 1.7× |
| 45° | 1705 | 97% | 3.55 | 1.6× |
| 60° | 1561 | 89% | 3.72 | 1.4× |
| 64° off-grid best | 1507 | 86% | 3.73 | 1.4× |
| 70° | 1416 | 81% | 3.71 | 1.4× |
| 90° | 1040 | 59% | 3.41 | 2.3× |
A fixed array in Būkān produces the most over a year at 30°. The design month for an off-grid system is December: at 64° it makes 3.73 kWh per kWp a day, 18% more than at 30°, and costs 14% of the yearly total. Why steep panels win winter.
Off-grid solar in Būkān 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 snow | 2.62 | 4.19 | 3.82 | 3.41 | -1.8 °C |
| February snow | 3.51 | 4.61 | 4.17 | 4.08 | -0.1 °C |
| March | 4.35 | 4.37 | 3.88 | 4.46 | 4.5 °C |
| April | 5.52 | 4.18 | 3.63 | 4.93 | 9.6 °C |
| May | 6.96 | 4.06 | 3.44 | 5.55 | 15.5 °C |
| June | 8.30 | 4.00 | 3.30 | 6.06 | 21.8 °C |
| July | 7.91 | 4.14 | 3.37 | 5.84 | 25.6 °C |
| August | 7.30 | 4.84 | 3.96 | 5.90 | 25.1 °C |
| September | 6.12 | 5.70 | 4.76 | 5.79 | 20.3 °C |
| October | 4.23 | 5.30 | 4.55 | 4.70 | 13.5 °C |
| November | 2.82 | 4.51 | 4.01 | 3.67 | 4.7 °C |
| December snow | 2.28 | 4.11 | 3.71 | 3.17 | 0.1 °C |
| Year | 5.17 avg | 4.50 avg | 1416 kWh | 1752 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 360 Wp of panels at 70°, versus 370 Wp at 30°. The steep array is 4% smaller for the same winter. Size your own system.
Row spacing in Būkān
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°
3.7 mrow pitch at 30°
How Būkān compares in Iran
Against the other 422 places in Iran with climate data, for a fixed array at its best angle.
262ndof 423 places in Iran for sunshine, shared: 5.17 peak sun hours a day on flat ground.
±0%solar energy a year compared with the average place in Iran: 1,752 against 1,760 kWh per kWp.
+5 mindaylight on the longest day, compared with Tehran: 14 h 39 min against 14 h 35 min.
30°best year-round tilt here; across Iran it runs from 24° in Kīsh to 33° in Khūy.
Of the 423 places in Iran, Jālq gets the most sun (6.10 peak sun hours a day) and Bandar-e Anzalī the least (3.92); Būkān ranks joint 262nd. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 3.30 kWh a day here, against 2.96 kWh on average in Iran. The shortest day lasts 9 h 40 min, −5 min compared with Tehran.
Solar forecast for Būkān, 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 Būkān
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Places near Būkān
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A free, live card for Būkān: 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.