Solarposition.org

Semnan · Iran · 35.23° N · 52.31° E

Solar position in Īstgāh-e Rāh Āhan-e Garmsār

Sun position, daylight and the best solar panel angle for Īstgāh-e Rāh Āhan-e Garmsār — computed for 35.23° N, 52.31° E, 848 m above sea level.

Sunrise today06:14104° ESE
Sunset today17:14256° WSW
Best panel angle30°year-round, facing south
Off-grid angle59°best for the darkest month

The sun right now

Azimuth180.0°
Elevation43.0°
At solar noon, 11:44Open on the sun map

Sun in Īstgāh-e Rāh Āhan-e Garmsār today

Saturday, 24 October 2026 · local time UTC+3:30

EventTimeDirection / height
Astronomical dawn04:49sun 18° below horizon
Nautical dawn05:1812° below
Civil dawn05:486° below
Sunrise06:14104° ESE
Golden hour ends06:49sun 6° up
Solar noon11:4443.0° high
Golden hour starts16:40sun 6° up
Sunset17:14256° WSW
Civil dusk17:406° below
Nautical dusk18:1012° below
Astronomical dusk18:3918° below
Day length11 h 00 min

Sun path diagram for Īstgāh-e Rāh Āhan-e Garmsār

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice5678910111213141516171819EquinoxDecember solstice8910111213141516Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 78.2° at solar noon in Īstgāh-e Rāh Āhan-e Garmsār; on the December solstice only 31.4°. 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January07:0612:1217:1710 h 11 min34.9°
February06:4012:1417:4811 h 08 min44.3°
March06:0312:0818:1312 h 10 min55.1°
April05:2111:5918:3813 h 17 min66.7°
May04:5211:5719:0214 h 10 min75.0°
June04:4612:0219:1814 h 32 min78.2°
July05:0112:0719:1214 h 11 min75.2°
August05:2412:0318:4213 h 18 min66.8°
September05:4711:5317:5912 h 12 min55.4°
October06:1111:4517:1811 h 07 min44.0°
November06:4111:4616:5110 h 10 min34.8°
December07:0511:5816:529 h 47 min31.4°

A year of daylight in Īstgāh-e Rāh Āhan-e Garmsār

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in Īstgāh-e Rāh Āhan-e Garmsār

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: 1776 kWh per kWp.

59°gives the most in the darkest month — the one an off-grid system is sized for.

40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 30°Best worst-month 59°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°156388%2.063.1×
15°172097%2.852.2×
30° year-round best1776100%3.451.7×
35° = latitude1771100%3.611.6×
45°172897%3.841.4×
59° off-grid best159390%3.971.3×
60°158089%3.981.3×
70°143281%3.931.5×
90°104359%3.512.3×

A fixed array in Īstgāh-e Rāh Āhan-e Garmsār produces the most over a year at 30°. The design month for an off-grid system is December: at 59° it makes 3.97 kWh per kWp a day, 15% more than at 30°, and costs 10% of the yearly total. Why steep panels win winter.

Off-grid solar in Īstgāh-e Rāh Āhan-e Garmsār at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 30° (year-round best).

01234567January: 4.07 (70°)4.1JanFebruary: 4.19 (70°)4.2FebMarch: 4.20 (70°)4.2MarApril: 3.70 (70°)3.7AprMay: 3.40 (70°)3.4MayJune: 3.18 (70°)3.2JunJuly: 3.22 (70°)3.2JulAugust: 3.78 (70°)3.8AugSeptember: 4.53 (70°)4.5SepOctober: 4.70 (70°)4.7OctNovember: 4.18 (70°)4.2NovDecember: 3.93 (70°)3.9Dec30°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 30°Mean temp.
January2.744.514.073.681.0 °C
February3.614.694.194.233.1 °C
March4.804.804.204.868.4 °C
April5.834.323.705.1113.4 °C
May7.104.083.405.5419.6 °C
June8.013.903.185.7924.9 °C
July7.613.983.225.5827.3 °C
August7.144.643.785.7126.1 °C
September6.065.464.535.6021.9 °C
October4.535.524.704.9215.6 °C
November3.064.754.183.897.3 °C
December2.494.383.933.452.6 °C
Year5.26 avg4.59 avg1432 kWh1776 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 340 Wp at 30°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Īstgāh-e Rāh Āhan-e Garmsār

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°

3.6 mrow pitch at 30°

Row spacing calculator

How Īstgāh-e Rāh Āhan-e Garmsār compares in Iran

Against the other 422 places in Iran with climate data, for a fixed array at its best angle.

236thof 423 places in Iran for sunshine, shared: 5.26 peak sun hours a day on flat ground.

+1%solar energy a year compared with the average place in Iran: 1,776 against 1,760 kWh per kWp.

−3 mindaylight on the longest day, compared with Tehran: 14 h 32 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); Īstgāh-e Rāh Āhan-e Garmsār ranks joint 236th. 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 47 min, +2 min compared with Tehran.

The sunniest places in Iran

Solar forecast for Īstgāh-e Rāh Āhan-e Garmsār, next 48 hours

Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.

Loading the latest forecast…

Questions about the sun in Īstgāh-e Rāh Āhan-e Garmsār

What is the best solar panel angle in Īstgāh-e Rāh Āhan-e Garmsār?
For a fixed array facing south, the best year-round tilt in Īstgāh-e Rāh Āhan-e Garmsār is 30°, worth about 1776 kWh per kWp a year. An off-grid system that has to get through December does better at about 59°.
What time is sunrise and sunset in Īstgāh-e Rāh Āhan-e Garmsār today?
On 24 October 2026 the sun rises at 06:14 and sets at 17:14 local time (UTC+3:30), giving 11 h 00 min of daylight. Solar noon is at 11:44.
How many peak sun hours does Īstgāh-e Rāh Āhan-e Garmsār get?
On a flat surface 5.3 hours a day averaged over the year, from 2.5 in December to 8.0 in June. Panels tilted at 70° receive 3.9 sun hours a day in June.
How high does the sun get in Īstgāh-e Rāh Āhan-e Garmsār?
At solar noon the sun stands 78.2° above the horizon on the June solstice and 31.4° on the December solstice.
Is Īstgāh-e Rāh Āhan-e Garmsār a good place for solar panels?
With 5.3 peak sun hours a day on flat ground, Īstgāh-e Rāh Āhan-e Garmsār ranks joint 236th of 423 places in Iran for sunshine. A 1 kWp array at the best angle (30°) makes about 1,776 kWh a year here, 1% more than the average place in Iran.

Places near Īstgāh-e Rāh Āhan-e Garmsār

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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.