Tehran · Iran · 35.82° N · 51.64° E
Solar position in Lavāsān
Sun position, daylight and the best solar panel angle for Lavāsān — computed for 35.82° N, 51.64° E, 1681 m above sea level.
The sun right now
Sun in Lavāsān 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 | 06:53 | sun 6° up |
| Solar noon | 11:47 | 42.4° high |
| Golden hour starts | 16:41 | sun 6° up |
| Sunset | 17:16 | 256° WSW |
| Civil dusk | 17:42 | 6° below |
| Nautical dusk | 18:12 | 12° below |
| Astronomical dusk | 18:42 | 18° below |
| Day length | 10 h 59 min | |
Sun path diagram for Lavāsān
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 77.6° at solar noon in Lavāsān; on the December solstice only 30.8°. 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 | 17:18 | 10 h 08 min | 34.3° |
| February | 06:43 | 12:17 | 17:50 | 11 h 07 min | 43.7° |
| March | 06:06 | 12:10 | 18:15 | 12 h 10 min | 54.5° |
| April | 05:23 | 12:02 | 18:41 | 13 h 18 min | 66.1° |
| May | 04:53 | 12:00 | 19:06 | 14 h 12 min | 74.4° |
| June | 04:47 | 12:05 | 19:22 | 14 h 35 min | 77.6° |
| July | 05:02 | 12:09 | 19:16 | 14 h 14 min | 74.6° |
| August | 05:26 | 12:06 | 18:45 | 13 h 19 min | 66.2° |
| September | 05:50 | 11:56 | 18:02 | 12 h 12 min | 54.8° |
| October | 06:15 | 11:47 | 17:20 | 11 h 05 min | 43.4° |
| November | 06:45 | 11:49 | 16:52 | 10 h 08 min | 34.3° |
| December | 07:09 | 12:01 | 16:53 | 9 h 44 min | 30.8° |
A year of daylight in Lavāsān
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 Lavāsān
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: 1631 kWh per kWp.
61°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° | 1441 | 88% | 1.88 | 3.2× |
| 15° | 1582 | 97% | 2.59 | 2.3× |
| 30° year-round best | 1631 | 100% | 3.14 | 1.7× |
| 36° = latitude | 1624 | 100% | 3.30 | 1.6× |
| 45° | 1586 | 97% | 3.49 | 1.4× |
| 60° | 1452 | 89% | 3.62 | 1.3× |
| 61° off-grid best | 1440 | 88% | 3.62 | 1.3× |
| 70° | 1317 | 81% | 3.57 | 1.4× |
| 90° | 966 | 59% | 3.20 | 2.1× |
A fixed array in Lavāsān produces the most over a year at 30°. The design month for an off-grid system is December: at 61° it makes 3.62 kWh per kWp a day, 15% more than at 30°, and costs 12% of the yearly total. Why steep panels win winter.
Off-grid solar in Lavāsān 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 | 2.54 | 4.14 | 3.72 | 3.36 | 2.0 °C |
| February | 3.26 | 4.18 | 3.73 | 3.77 | 3.6 °C |
| March | 4.38 | 4.35 | 3.81 | 4.40 | 8.4 °C |
| April | 5.37 | 4.00 | 3.43 | 4.70 | 13.0 °C |
| May | 6.60 | 3.86 | 3.22 | 5.17 | 19.0 °C |
| June | 7.52 | 3.77 | 3.08 | 5.47 | 24.3 °C |
| July | 7.09 | 3.81 | 3.08 | 5.23 | 26.8 °C |
| August | 6.66 | 4.39 | 3.58 | 5.33 | 26.0 °C |
| September | 5.56 | 5.01 | 4.16 | 5.12 | 22.1 °C |
| October | 4.11 | 4.94 | 4.20 | 4.41 | 16.1 °C |
| November | 2.78 | 4.26 | 3.74 | 3.48 | 8.2 °C |
| December | 2.29 | 4.01 | 3.57 | 3.14 | 3.7 °C |
| Year | 4.85 avg | 4.23 avg | 1317 kWh | 1631 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 380 Wp of panels at 70°, versus 380 Wp at 30°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Lavāsān
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.
4.3 mrow pitch at 70°
3.6 mrow pitch at 30°
How Lavāsān compares in Iran
Against the other 422 places in Iran with climate data, for a fixed array at its best angle.
352ndof 423 places in Iran for sunshine, shared: 4.85 peak sun hours a day on flat ground.
−7%solar energy a year compared with the average place in Iran: 1,631 against 1,760 kWh per kWp.
+1 mindaylight on the longest day, compared with Tehran: 14 h 35 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); Lavāsān ranks joint 352nd. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 3.08 kWh a day here, against 2.96 kWh on average in Iran. The shortest day lasts 9 h 44 min, −1 min compared with Tehran.
Solar forecast for Lavāsān, 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 Lavāsān
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Places near Lavāsān
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A free, live card for Lavāsān: 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.