Tehran · Iran · 35.52° N · 51.65° E
Solar position in Qīāmdasht
Sun position, daylight and the best solar panel angle for Qīāmdasht — computed for 35.52° N, 51.65° E, 1033 m above sea level.
The sun right now
Sun in Qīāmdasht today
Saturday, 24 October 2026 · local time UTC+3:30
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:52 | sun 18° below horizon |
| Nautical dawn | 05:21 | 12° below |
| Civil dawn | 05:51 | 6° below |
| Sunrise | 06:17 | 104° ESE |
| Golden hour ends | 06:52 | sun 6° up |
| Solar noon | 11:47 | 42.7° high |
| Golden hour starts | 16:42 | sun 6° up |
| Sunset | 17:17 | 256° WSW |
| Civil dusk | 17:43 | 6° below |
| Nautical dusk | 18:12 | 12° below |
| Astronomical dusk | 18:42 | 18° below |
| Day length | 11 h 00 min | |
Sun path diagram for Qīāmdasht
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 77.9° at solar noon in Qīāmdasht; on the December solstice only 31.1°. 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 | 07:10 | 12:14 | 17:19 | 10 h 09 min | 34.6° |
| February | 06:43 | 12:17 | 17:50 | 11 h 07 min | 44.0° |
| March | 06:06 | 12:10 | 18:15 | 12 h 10 min | 54.8° |
| April | 05:23 | 12:02 | 18:41 | 13 h 18 min | 66.4° |
| May | 04:54 | 12:00 | 19:05 | 14 h 11 min | 74.7° |
| June | 04:48 | 12:05 | 19:22 | 14 h 34 min | 77.9° |
| July | 05:03 | 12:09 | 19:15 | 14 h 13 min | 74.9° |
| August | 05:27 | 12:06 | 18:45 | 13 h 18 min | 66.5° |
| September | 05:50 | 11:56 | 18:02 | 12 h 12 min | 55.1° |
| October | 06:14 | 11:47 | 17:20 | 11 h 06 min | 43.7° |
| November | 06:44 | 11:49 | 16:53 | 10 h 09 min | 34.6° |
| December | 07:08 | 12:01 | 16:54 | 9 h 45 min | 31.1° |
A year of daylight in Qīāmdasht
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 Qīāmdasht
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
31°collects the most energy over a year: 1739 kWh per kWp.
60°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° | 1530 | 88% | 2.00 | 3.2× |
| 15° | 1684 | 97% | 2.78 | 2.2× |
| 30° | 1739 | 100% | 3.37 | 1.7× |
| 31° year-round best | 1739 | 100% | 3.40 | 1.7× |
| 36° = latitude | 1732 | 100% | 3.55 | 1.6× |
| 45° | 1693 | 97% | 3.75 | 1.4× |
| 60° off-grid best | 1549 | 89% | 3.89 | 1.3× |
| 70° | 1404 | 81% | 3.85 | 1.4× |
| 90° | 1025 | 59% | 3.44 | 2.3× |
A fixed array in Qīāmdasht produces the most over a year at 31°. The design month for an off-grid system is December: at 60° it makes 3.89 kWh per kWp a day, 14% more than at 31°, and costs 11% of the yearly total. Why steep panels win winter.
Off-grid solar in Qīāmdasht at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 31° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 31° | Mean temp. |
|---|---|---|---|---|---|
| January | 2.69 | 4.45 | 4.01 | 3.64 | 1.7 °C |
| February | 3.48 | 4.55 | 4.05 | 4.10 | 3.7 °C |
| March | 4.67 | 4.68 | 4.09 | 4.73 | 8.9 °C |
| April | 5.66 | 4.22 | 3.61 | 4.94 | 13.8 °C |
| May | 6.95 | 4.02 | 3.35 | 5.39 | 20.1 °C |
| June | 7.97 | 3.91 | 3.18 | 5.71 | 25.7 °C |
| July | 7.58 | 3.99 | 3.21 | 5.50 | 28.3 °C |
| August | 7.10 | 4.64 | 3.76 | 5.63 | 27.1 °C |
| September | 5.99 | 5.41 | 4.48 | 5.52 | 22.7 °C |
| October | 4.41 | 5.37 | 4.56 | 4.79 | 16.3 °C |
| November | 2.96 | 4.60 | 4.04 | 3.78 | 7.9 °C |
| December | 2.43 | 4.31 | 3.85 | 3.40 | 3.3 °C |
| Year | 5.16 avg | 4.51 avg | 1404 kWh | 1739 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 370 Wp of panels at 70°, versus 350 Wp at 31°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Qīāmdasht
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.
4.2 mrow pitch at 70°
3.7 mrow pitch at 31°
How Qīāmdasht compares in Iran
Against the other 422 places in Iran with climate data, for a fixed array at its best angle.
266thof 423 places in Iran for sunshine, shared: 5.16 peak sun hours a day on flat ground.
−1%solar energy a year compared with the average place in Iran: 1,739 against 1,760 kWh per kWp.
−1 mindaylight on the longest day, compared with Tehran: 14 h 34 min against 14 h 35 min.
31°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); Qīāmdasht ranks joint 266th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 3.18 kWh a day here, against 2.96 kWh on average in Iran. The shortest day lasts 9 h 45 min, +1 min compared with Tehran.
Solar forecast for Qīāmdasht, 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 Qīāmdasht: 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.